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JP2007005853

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DESCRIPTION JP2007005853
PROBLEM TO BE SOLVED: To control output of audio data automatically according to
surrounding conditions. SOLUTION: When it is judged that it is night, for example, based on the
time information acquired by the time information unit 103, the gain adjustment unit 101
reduces the gain of audio data and then outputs it to the audio output unit 104. [Selected figure]
Figure 1
Speech decoder
[0001]
The present invention relates to an audio decoding apparatus that decodes audio stream data.
[0002]
FIG. 23 is a block diagram showing the configuration of a conventional speech decoding
apparatus.
As shown in FIG. 23, the audio decoding unit 100 decodes the audio stream 105, and the
decoded data is input to the audio output unit 104, whereby audio data is output.
[0003]
At this time, the gain, the DRC, the frequency characteristic, the reproduction speed, and the like
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of the audio data output from the audio output unit 104 have always been constant regardless of
time, the genre of the audio stream, and the like.
[0004]
Patent Document 1 describes the gain, frequency characteristics (equalizing characteristics), or
dynamic range of sound output in consideration of the volume level of ambient noise, the gain of
the stream itself, the frequency characteristics (equalizing characteristics), or the dynamic range
characteristics. A technique for setting the optimal setting value is disclosed.
Unexamined-Japanese-Patent No. 11-232787
[0005]
Here, in order to keep the audience easy to hear the voice data while taking care not to make
noise to the surrounding people, the voice data from the voice output unit 104 is used at
nighttime when the ambient noise level is small. In the daytime, when the gain (volume) is
lowered and the noise level is increased, it is considered that the gain is increased for viewing.
[0006]
Furthermore, the audio data is set so that the DRC is high at night (ie, the difference between the
maximum audio level and the minimum audio level is small) in consideration of the surrounding
people, and it is easy to hear in the daytime In order to keep the DRC low (to increase the level
difference) before watching.
[0007]
Also, the audio data is viewed by cutting low frequency domain components that are likely to be
transmitted as noise to the surroundings at night (that is, through a high pass filter for audio),
and is viewed without performing such a cut in the daytime. It is also good.
[0008]
On the other hand, when looking at audio streams by genre, there are various genres such as
rock music with large volume and natural sound for relaxation with small volume.
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When viewing such audio data, the viewer lowers the gain in consideration of the surroundings
for audio data of a genre with a large volume, and increases the gain in order to maintain the
audibleness for audio data of a genre with a small volume. Conceivable.
[0009]
Further, the DRC may be set high in the genre of high sound volume for the audio data, and the
DRC may be set low in the genre of low sound volume for viewing.
[0010]
Further, the audio data may be viewed by cutting the low frequency region component in a genre
of a large volume, and may be viewed without performing such a cut in a genre of a small
volume.
[0011]
Besides, for example, in the case of an audio stream stored in a data storage type medium (CD,
DVD, etc.), it may be possible to maintain the ease of listening if the reproduction speed is
reduced or increased.
[0012]
Also, for example, in the case of viewing audio data in a car, if the window of the car is open, a
method of reducing the gain of the audio data before watching so as not to cause noise to the
surrounding people Is preferred.
[0013]
Furthermore, when the conditions described above are set in reverse according to the preference
of the viewer (for example, the gain is increased at night), the limit value is set so that the
characteristics of the audio data fall within the predetermined range. This may be appropriate
depending on the user's convenience and preferences.
[0014]
However, in the conventional voice decoding apparatus, the viewer has to perform these controls
manually, which has been very time-consuming and troublesome.
08-05-2019
3
[0015]
The present invention has been made in view of such a point, and an object of the present
invention is to automatically control output of audio data in accordance with the surrounding
conditions.
[0016]
That is, the speech decoding apparatus according to the present invention includes: a speech
decoding unit that decodes a speech stream; a gain adjustment unit that performs gain
adjustment of speech data output from the speech decoding unit; A voice output unit for
outputting voice data, a time information unit for obtaining time information, and a gain control
unit for controlling the gain adjustment unit based on the time information.
[0017]
As described above, according to the present invention, it is possible to automatically adjust the
gain and DRC of audio data output from the audio output unit to appropriate values based on
time and illuminance information etc. There is no need for manual adjustment, which is
preferable.
[0018]
Hereinafter, embodiments of the present invention will be described in detail based on the
drawings.
The following description of the preferred embodiments is merely exemplary in nature and is in
no way intended to limit the invention, its applications or its uses.
[0019]
First Embodiment FIG. 1 is a block diagram showing a configuration of a speech decoding
apparatus 1 according to a first embodiment of the present invention.
As shown in FIG. 1, the audio decoding device 1 includes an audio decoding unit 100 for
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decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, time information And a voice
output unit 104 (for example, a speaker etc.) for outputting voice data.
[0020]
When the encoded audio stream 105 is input to the audio decoding apparatus 1, first, the audio
stream 105 is decoded by the audio decoding unit 100 to generate audio data, and this audio
data is a gain adjustment unit 101. Is input to
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0021]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the gain control unit 102.
[0022]
The gain control unit 102 calculates a gain value of audio data according to the received time
information.
Specifically, it is determined that the gain of the audio data should be lowered if the time
information is night (20:00 to 7:00), and if it is daytime (7:00 to 20:00) It is determined that the
gain of the data should be increased, and the gain value corresponding to each case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0023]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
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output unit 104.
[0024]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0025]
As described above, according to the voice decoding device according to the first embodiment,
when listening to voice data output from the voice output unit 104, the viewer can hear the
surrounding noise level at night when the noise level in the surroundings decreases. It is very
convenient to be able to listen by raising the gain (volume) of the voice data as consideration for
human beings and to increase the gain to maintain the ease of listening in the daytime when the
noise level becomes large conversely Increase.
[0026]
In the first embodiment, the configuration in which the audio stream 105 and the audio decoding
unit 100 are combined has been described, but the present invention is not limited to this
configuration, and some audio data is output instead of these combinations. May be
This point is the same as in the following embodiments.
[0027]
Second Embodiment FIG. 2 is a block diagram showing the configuration of a speech decoding
apparatus 2 according to a second embodiment of the present invention.
As shown in FIG. 2, the audio decoding apparatus 2 includes an audio decoding unit 100 for
decoding an audio stream, a DRC adjustment unit 201 for adjusting dynamic range compression
(DRC) of audio data, and a DRC control for controlling the DRC adjustment unit 201. A unit 202,
a time information unit 103 for acquiring time information, and an audio output unit 104 for
outputting audio data.
08-05-2019
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[0028]
When the encoded audio stream 105 is input to the audio decoding device 2, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
DRC adjustment unit 201. Is input to
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0029]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the DRC control unit 202.
[0030]
The DRC control unit 202 calculates a DRC according to the received time information.
Specifically, when time information is night (20:00 to 7:00), DRC of voice data should be set high
(that is, the difference between the maximum voice level and the minimum voice level is small).
In the daytime (7:00 to 20:00), it is determined that the DRC of the audio data should be set low
(so that the level difference becomes large), depending on each case. DRC values are calculated.
Then, the calculated DRC value is transmitted to the DRC adjustment unit 201.
[0031]
The DRC adjustment unit 201 adjusts the DRC value of the audio data output from the audio
decoding unit 100 based on the DRC value, and the adjusted audio data is output to the audio
output unit 104.
[0032]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
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[0033]
Third Embodiment FIG. 3 is a block diagram showing the configuration of a speech decoding
apparatus 3 according to a third embodiment of the present invention.
As shown in FIG. 3, the audio decoding device 3 controls an audio decoding unit 100 that
decodes an audio stream, a frequency adjustment unit 301 that adjusts the gain of a specific
frequency domain component of audio data, and a frequency adjustment unit 301. A frequency
control unit 302, a time information unit 103 for acquiring time information, and an audio
output unit 104 for outputting audio data are provided.
[0034]
When the encoded audio stream 105 is input to the audio decoding device 3, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
output to the frequency adjustment unit 301. Is input to
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0035]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the frequency control unit
302.
[0036]
The frequency control unit 302 calculates the gain value of the low frequency domain
component according to the received time information.
Specifically, when the time information is nighttime (20:00 to 7:00), it is determined that the low
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frequency domain component of the audio data should be cut, and in the daytime (7:00 to 20:00)
In such a case, it is determined that such a cut should not be performed, and the gain value of the
low frequency domain component according to each case is calculated.
Then, the calculated gain value of the low frequency region component is transmitted to the
frequency adjustment unit 301.
[0037]
The frequency adjustment unit 301 adjusts the gain value of the low frequency region
component of the audio data output from the audio decoding unit 100 based on the gain value of
the low frequency region component, and the adjusted audio data Are output to the audio output
unit 104.
[0038]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0039]
Fourth Embodiment FIG. 4 is a block diagram showing the configuration of a speech decoding
apparatus 4 according to a fourth embodiment of the present invention.
As shown in FIG. 4, the audio decoding device 4 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, and illuminance information And
an audio output unit 104 for outputting audio data.
[0040]
When the encoded audio stream 105 is input to the audio decoding device 4, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is a
gain adjustment unit 101. Is input to
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9
At this time, information indicating that voice data has been generated is notified to the
illuminance information unit 403.
[0041]
The illuminance information unit 403 acquires illuminance information at the time when the
notification is received, and transmits the illuminance information to the gain control unit 102.
[0042]
The gain control unit 102 calculates a gain value of audio data according to the received
illuminance information.
Specifically, when the illuminance information indicates the illuminance corresponding to the
nighttime (20:00 to 7:00), it is judged that the gain of the voice data should be lowered, and the
daytime (7:00 to 20: When the illuminance corresponding to 00) is indicated, it is determined
that the gain of the audio data should be increased, and the gain value corresponding to each
case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0043]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0044]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0045]
As described above, according to the speech decoding apparatus according to the fourth
embodiment, when listening to speech data output from the speech output unit 104, it is
determined whether the current day is day or night based on illuminance information. It can be
judged that the viewer listens to the sound during the daytime when the noise level is increased
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by lowering the gain (volume) of the audio data as a consideration for the surrounding people at
night when the ambient noise level decreases. In order to keep the gain can be raised to be able
to hear, it becomes very convenient.
[0046]
Fifth Embodiment FIG. 5 is a block diagram showing the configuration of a speech decoding
apparatus 5 according to a fifth embodiment of the present invention.
As shown in FIG. 5, the audio decoding device 5 includes an audio decoding unit 100 for
decoding an audio stream, a DRC adjustment unit 201 for adjusting dynamic range compression
(DRC) of audio data, and a DRC control for controlling the DRC adjustment unit 201. A section
202, an illuminance information section 403 for acquiring illuminance information, and an audio
output section 104 for outputting audio data.
[0047]
When the encoded audio stream 105 is input to the audio decoding device 5, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
DRC adjustment unit 201. Is input to
At this time, information indicating that voice data has been generated is notified to the
illuminance information unit 403.
[0048]
The illuminance information unit 403 acquires illuminance information at the time when the
notification is received, and transmits the illuminance information to the DRC control unit 202.
[0049]
The DRC control unit 202 calculates a DRC according to the received illuminance information.
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Specifically, when the illuminance information indicates the illuminance corresponding to
nighttime (20:00 to 7:00), the DRC of the audio data is high (that is, the difference between the
maximum audio level and the minimum audio level is small) Is determined to be set, and the DRC
of audio data is set low (in order to increase the level difference) when the illuminance
corresponding to daytime (7:00 to 20:00) is indicated. It is determined that it should be done,
and the DRC value is calculated according to each case.
Then, the calculated DRC value is transmitted to the DRC adjustment unit 201.
[0050]
The DRC adjustment unit 201 adjusts the DRC value of the audio data output from the audio
decoding unit 100 based on the DRC value, and the adjusted audio data is output to the audio
output unit 104.
[0051]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0052]
Sixth Embodiment FIG. 6 is a block diagram showing the configuration of a speech decoding
apparatus 6 according to a sixth embodiment of the present invention.
As shown in FIG. 6, the audio decoding device 6 controls an audio decoding unit 100 for
decoding an audio stream, a frequency adjustment unit 301 for adjusting the gain of a specific
frequency domain component of audio data, and a frequency adjustment unit 301. A frequency
control unit 302, an illuminance information unit 403 for acquiring illuminance information, and
an audio output unit 104 for outputting audio data are provided.
[0053]
When the encoded audio stream 105 is input to the audio decoding device 6, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
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output to the frequency adjustment unit 301. Is input to
At this time, information indicating that voice data has been generated is notified to the
illuminance information unit 403.
[0054]
The illuminance information unit 403 acquires illuminance information indicating the
illuminance at the time when the notification is received, and transmits the illuminance
information to the frequency control unit 302.
[0055]
The frequency control unit 302 calculates the gain value of the low frequency region component
according to the received illuminance information.
Specifically, when the illuminance information indicates the illuminance corresponding to the
nighttime (20:00 to 7:00), it is determined that the low frequency region component of the audio
data should be cut, and the daytime (7: When the illuminance corresponding to 00 to 20:00 is
indicated, it is determined that such a cut should not be performed, and the gain value of the low
frequency region component corresponding to each case is calculated.
Then, the calculated gain value of the low frequency region component is transmitted to the
frequency adjustment unit 301.
[0056]
The frequency adjustment unit 301 adjusts the gain value of the low frequency region
component of the audio data output from the audio decoding unit 100 based on the gain value of
the low frequency region component, and the adjusted audio data Are output to the audio output
unit 104.
[0057]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
08-05-2019
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[0058]
Seventh Embodiment FIG. 7 is a block diagram showing the configuration of a speech decoding
apparatus 7 according to a seventh embodiment of the present invention.
As shown in FIG. 7, the audio decoding device 7 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, and temperature information And
a voice output unit 104 for outputting voice data.
[0059]
When the encoded audio stream 105 is input to the audio decoding device 7, the audio decoding
unit 100 first decodes the audio stream 105 to generate audio data, and this audio data is used
as the gain adjustment unit 101. Is input to
At this time, the temperature information unit 703 is notified of information indicating that voice
data has been generated.
[0060]
The air temperature information unit 703 acquires air temperature information at the time when
the notification is received, and transmits the air temperature information to the gain control unit
102.
[0061]
The gain control unit 102 calculates a gain value of audio data according to the received air
temperature information.
Specifically, when the temperature information indicates the temperature corresponding to the
nighttime (20:00 to 7:00), it is judged that the gain of the voice data should be lowered, and the
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daytime (7:00 to 20:00: When the air temperature corresponding to 00) is indicated, it is judged
that the gain of the audio data should be increased, and the gain value corresponding to each
case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0062]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0063]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0064]
Embodiment 8 FIG. 8 is a block diagram showing the configuration of speech decoding apparatus
8 according to Embodiment 8 of the present invention.
As shown in FIG. 8, the audio decoding apparatus 8 includes an audio decoding unit 100 for
decoding an audio stream, a DRC adjustment unit 201 for adjusting dynamic range compression
(DRC) of audio data, and a DRC control for controlling the DRC adjustment unit 201. A section
202, a temperature information section 703 for acquiring temperature information, and an audio
output section 104 for outputting audio data.
[0065]
When the encoded audio stream 105 is input to the audio decoding device 8, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
DRC adjustment unit 201. Is input to
At this time, the temperature information unit 703 is notified of information indicating that voice
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data has been generated.
[0066]
The air temperature information unit 703 acquires air temperature information at the time when
the notification is received, and transmits the air temperature information to the DRC control unit
202.
[0067]
The DRC control unit 202 calculates a DRC according to the received temperature information.
Specifically, when the temperature information indicates the temperature corresponding to
nighttime (20:00 to 7:00), the DRC of the audio data is high (that is, the difference between the
maximum audio level and the minimum audio level is small) Is determined to be set, and the DRC
of the audio data is set low (so that the above-mentioned level difference becomes large) when
indicating the temperature corresponding to daytime (7:00 to 20:00) It is determined that it
should be done, and the DRC value is calculated according to each case.
Then, the calculated DRC value is transmitted to the DRC adjustment unit 201.
[0068]
The DRC adjustment unit 201 adjusts the DRC value of the audio data output from the audio
decoding unit 100 based on the DRC value, and the adjusted audio data is output to the audio
output unit 104.
[0069]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0070]
Embodiment 9 FIG. 9 is a block diagram showing a configuration of speech decoding apparatus 9
according to Embodiment 9 of the present invention.
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As shown in FIG. 9, the audio decoding device 9 controls an audio decoding unit 100 for
decoding an audio stream, a frequency adjustment unit 301 for adjusting the gain of a specific
frequency domain component of audio data, and a frequency adjustment unit 301. A frequency
control unit 302, an air temperature information unit 703 for acquiring air temperature
information, and an audio output unit 104 for outputting audio data are provided.
[0071]
When the encoded audio stream 105 is input to the audio decoding device 9, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
output to the frequency adjustment unit 301. Is input to
At this time, the temperature information unit 703 is notified of information indicating that voice
data has been generated.
[0072]
The air temperature information unit 703 acquires air temperature information indicating the air
temperature at the time when the notification is received, and the air temperature information is
transmitted to the frequency control unit 302.
[0073]
The frequency control unit 302 calculates the gain value of the low frequency region component
according to the received air temperature information.
Specifically, when the temperature information indicates the temperature corresponding to the
nighttime (20:00 to 7:00), it is judged that the low frequency region component of the audio data
should be cut, and the daytime (7: When the air temperature corresponding to 00 to 20:00 is
indicated, it is determined that such a cut should not be performed, and the gain value of the low
frequency region component corresponding to each case is calculated.
08-05-2019
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Then, the calculated gain value of the low frequency region component is transmitted to the
frequency adjustment unit 301.
[0074]
The frequency adjustment unit 301 adjusts the gain value of the low frequency region
component of the audio data output from the audio decoding unit 100 based on the gain value of
the low frequency region component, and the adjusted audio data Are output to the audio output
unit 104.
[0075]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0076]
Tenth Embodiment FIG. 10 is a block diagram showing the configuration of a speech decoding
apparatus 10 according to a tenth embodiment of the present invention.
As shown in FIG. 10, the audio decoding apparatus 10 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, and genre information. And a voice
output unit 104 for outputting voice data.
[0077]
When the encoded audio stream 105 is input to the audio decoding device 10, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is a
gain adjustment unit 101. Is input to
At this time, the genre information section 1003 is notified of information indicating that audio
data has been generated.
[0078]
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The genre information unit 1003 acquires genre information of the audio stream 105, and
transmits the genre information to the gain control unit 102.
[0079]
The genre information of the audio stream 105 is classified into n types (n = 1, 2, 3,...), And the
genre information unit 1003 and the gain control unit 102 can respectively identify the genre
information. .
[0080]
The gain control unit 102 calculates a gain value of audio data according to the received genre
information.
Specifically, for example, when the genre information is a genre having a large volume such as
rock music, it is determined that the gain of the audio data should be lowered. For example, when
the genre information has a small volume such as natural sound. It is determined that the gain of
the voice data should be increased, and a gain value corresponding to each case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0081]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0082]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0083]
Eleventh Embodiment FIG. 11 is a block diagram showing the configuration of a speech decoding
apparatus 11 according to an eleventh embodiment of the present invention.
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As shown in FIG. 11, the audio decoding apparatus 11 includes an audio decoding unit 100 for
decoding an audio stream, a DRC adjustment unit 201 for adjusting dynamic range compression
(DRC) of audio data, and a DRC control for controlling the DRC adjustment unit 201. A section
202, a genre information section 1003 for acquiring genre information, and an audio output
section 104 for outputting audio data.
[0084]
When the encoded audio stream 105 is input to the audio decoding device 11, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
DRC adjustment unit 201. Is input to
At this time, the genre information section 1003 is notified of information indicating that audio
data has been generated.
[0085]
The genre information unit 1003 acquires genre information of the audio stream 105, and
transmits the genre information to the DRC control unit 202.
[0086]
The genre information of the audio stream 105 is classified into n types (n = 1, 2, 3,...), And the
genre information unit 1003 and the DRC control unit 202 can respectively identify the genre
information. .
[0087]
The DRC control unit 202 calculates a DRC according to the received genre information.
Specifically, if the genre information is a genre with high volume such as rock music, for
example, the DRC of the audio data should be set high (that is, the difference between the
maximum audio level and the minimum audio level is small) It is determined that the DRC of the
08-05-2019
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audio data should be set low (so that the level difference becomes large), for example, in the case
of a genre where the volume of natural sound etc. is small, depending on each case. DRC value is
calculated.
Then, the calculated DRC value is transmitted to the DRC adjustment unit 201.
[0088]
The DRC adjustment unit 201 adjusts the DRC value of the audio data output from the audio
decoding unit 100 based on the DRC value, and the adjusted audio data is output to the audio
output unit 104.
[0089]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0090]
Embodiment 12 FIG. 12 is a block diagram showing a configuration of speech decoding
apparatus 12 according to Embodiment 12 of the present invention.
As shown in FIG. 12, the audio decoding device 12 controls an audio decoding unit 100 that
decodes an audio stream, a frequency adjustment unit 301 that adjusts the gain of a specific
frequency domain component of audio data, and a frequency adjustment unit 301. A frequency
control unit 302, a genre information unit 1003 for acquiring genre information, and an audio
output unit 104 for outputting audio data are provided.
[0091]
When the encoded audio stream 105 is input to the audio decoding device 12, first, the audio
stream 105 is decoded by the audio decoding unit 100 to generate audio data, and this audio
data is output to the frequency adjustment unit 301. Is input to
At this time, the genre information section 1003 is notified of information indicating that audio
08-05-2019
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data has been generated.
[0092]
The genre information unit 1003 acquires genre information of the audio stream 105 and
transmits the genre information to the frequency control unit 302.
[0093]
The genre information of the audio stream 105 is classified into n types (n = 1, 2, 3,...), And the
genre information unit 1003 and the frequency control unit 302 can respectively identify the
genre information. .
[0094]
The frequency control unit 302 calculates the gain value of the low frequency domain
component according to the received genre information.
Specifically, if the genre information is a genre having a large volume such as rock music, for
example, it is determined that the low frequency region component of the audio data should be
cut, for example, a genre having a small volume such as natural sound. In some cases, it is
determined that such a cut should not be performed, and the gain value of the low frequency
domain component is calculated according to each case.
Then, the calculated gain value of the low frequency region component is transmitted to the
frequency adjustment unit 301.
[0095]
The frequency adjustment unit 301 adjusts the gain value of the low frequency region
component of the audio data output from the audio decoding unit 100 based on the gain value of
the low frequency region component, and the adjusted audio data Are output to the audio output
unit 104.
[0096]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
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[0097]
Embodiment 13 FIG. 13 is a block diagram showing a configuration of speech decoding
apparatus 13 according to Embodiment 13 of the present invention.
As shown in FIG. 13, the audio decoding device 13 includes an audio decoding unit 100 for
decoding an audio stream, a speed adjustment unit 1301 for changing the reproduction speed of
audio data, a speed control unit 1302 for controlling the speed adjustment unit 1301, and a
genre. A genre information unit 1003 for acquiring information and an audio output unit 104 for
outputting audio data are provided.
[0098]
When the encoded audio stream 105 is input to the audio decoding device 13, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
transmitted to the speed adjustment unit 1301. Is input to
At this time, the genre information section 1003 is notified of information indicating that audio
data has been generated.
[0099]
The genre information unit 1003 acquires genre information of the audio stream 105 and
transmits the genre information to the speed control unit 1302.
[0100]
The genre information of the audio stream 105 is classified into n types (n = 1, 2, 3,...), And the
genre information unit 1003 and the speed control unit 1302 can respectively identify the genre
information. .
[0101]
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23
The speed control unit 1302 calculates the reproduction speed of audio data according to the
received genre information.
Specifically, it is determined that the reproduction speed of the audio data should be increased if
the genre information is a genre in which the reproduction speed may be changed, such as news
or variety, for example, reproduction of sports, audio, etc. In the case of a genre in which the
speed should not be changed, it is judged that the reproduction speed should not be increased,
and the reproduction speed corresponding to each case is calculated.
Then, a value indicating the calculated reproduction speed is transmitted to the speed adjustment
unit 1301.
[0102]
The speed adjustment unit 1301 adjusts the reproduction speed of the audio data output from
the audio decoding unit 100 based on the value indicating the reproduction speed, and the
adjusted audio data is output to the audio output unit 104. Be done.
[0103]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0104]
As described above, according to the speech decoding apparatus of the thirteenth embodiment,
when listening to speech data output from the speech output unit 104, the reproduction speed
can be changed according to the genre of the speech stream.
That is, if the genre of the audio stream is to save by listening to time such as news or variety, the
viewer should increase the playback speed and listen, and the playback speed of sports, music
etc should not change. In some cases, it is possible to automatically set the playback speed, such
as listening without increasing the playback speed, which greatly enhances convenience.
[0105]
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24
Fourteenth Embodiment FIG. 14 is a block diagram showing the configuration of a speech
decoding apparatus 14 according to a fourteenth embodiment of the present invention.
As shown in FIG. 14, the audio decoding device 14 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, and a viewer. The operation
information unit 1403 acquires operation information indicating the ON / OFF state of the room
light in the room where the room is located, and the voice output unit 104 outputs voice data.
[0106]
When the encoded audio stream 105 is input to the audio decoding device 14, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is a
gain adjustment unit 101. Is input to At this time, information indicating that voice data has been
generated is notified to the operation information unit 1403.
[0107]
The operation information unit 1403 acquires operation information indicating the ON / OFF
state of the indoor light at the time when the notification is given, and transmits the operation
information to the gain control unit 102.
[0108]
The gain control unit 102 calculates a gain value of audio data according to the received
operation information.
Specifically, when the operation information indicates that the room light is ON, that is, night
(20:00 to 7:00), it is determined that the gain of the audio data should be lowered, and the room
light It is determined that the gain of the audio data should be increased if it indicates that it is in
the daytime (7:00 to 20:00), and the gain value according to each case is calculated. . Then, the
calculated gain value is transmitted to the gain adjustment unit 101.
08-05-2019
25
[0109]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0110]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0111]
Fifteenth Embodiment FIG. 15 is a block diagram showing the configuration of a speech decoding
apparatus 15 according to a fifteenth embodiment of the present invention.
As shown in FIG. 15, the audio decoding device 15 includes an audio decoding unit 100 for
decoding an audio stream, a DRC adjustment unit 201 for adjusting dynamic range compression
(DRC) of audio data, and a DRC control for controlling the DRC adjustment unit 201. A section
202, an operation information section 1403 for acquiring operation information indicating an
ON / OFF state of a room light in a room in which a viewer is present, and an audio output
section 104 for outputting audio data.
[0112]
When the encoded audio stream 105 is input to the audio decoding device 15, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is
DRC adjustment unit 201. Is input to
At this time, information indicating that voice data has been generated is notified to the operation
information unit 1403.
[0113]
The operation information unit 1403 acquires operation information indicating the ON / OFF
state of the indoor light at the time when the notification is received, and transmits the time
08-05-2019
26
information to the DRC control unit 202.
[0114]
The DRC control unit 202 calculates a DRC according to the received operation information.
Specifically, when the operation information indicates that the room light is ON, that is, night
(20:00 to 7:00), the DRC of the voice data is high (ie, the maximum voice level and the minimum
voice). If it is determined that the level difference should be small and it indicates that the room
light is off, ie, it is daytime (7:00 to 20:00), the DRC of the audio data should be set. It is
determined that the value should be set low (in order to increase the level difference), and the
DRC value corresponding to each case is calculated. Then, the calculated DRC value is
transmitted to the DRC adjustment unit 201.
[0115]
The DRC adjustment unit 201 adjusts the DRC value of the audio data output from the audio
decoding unit 100 based on the DRC value, and the adjusted audio data is output to the audio
output unit 104.
[0116]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0117]
Sixteenth Embodiment FIG. 16 is a block diagram showing a configuration of the speech
decoding apparatus 16 according to a sixteenth embodiment of the present invention.
As shown in FIG. 16, the audio decoding device 16 controls an audio decoding unit 100 for
decoding an audio stream, a frequency adjustment unit 301 for adjusting the gain of a specific
frequency domain component of audio data, and a frequency adjustment unit 301. A frequency
control unit 302, an operation information unit 1403 for acquiring operation information
indicating an ON / OFF state of a room light in a room where a viewer is present, and an audio
output unit 104 for outputting audio data.
08-05-2019
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[0118]
When the encoded audio stream 105 is input to the audio decoding apparatus 16, first, the audio
stream 105 is decoded by the audio decoding unit 100 to generate audio data, and this audio
data is output to the frequency adjustment unit 301. Is input to
At this time, information indicating that voice data has been generated is notified to the operation
information unit 1403.
[0119]
The operation information unit 1403 acquires operation information indicating the ON / OFF
state of the indoor light at the time when the notification is given, and transmits the time
information to the frequency control unit 302.
[0120]
The frequency control unit 302 calculates the gain value of the low frequency domain
component according to the received operation information.
Specifically, when the operation information indicates that the room light is ON, that is, at night
(20:00 to 7:00), it is determined that the low-frequency component of the audio data should be
cut. If the room light is off, indicating that it is daytime (7:00 to 20:00), it is judged that such a
cut should not be made, and the low frequency range according to each case The gain value of
the component is calculated. Then, the calculated gain value of the low frequency region
component is transmitted to the frequency adjustment unit 301.
[0121]
The frequency adjustment unit 301 adjusts the gain value of the low frequency region
component of the audio data output from the audio decoding unit 100 based on the gain value of
the low frequency region component, and the adjusted audio data Are output to the audio output
unit 104.
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[0122]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0123]
Seventeenth Embodiment FIG. 17 is a block diagram showing the configuration of a speech
decoding apparatus 17 according to a seventeenth embodiment of the present invention.
As shown in FIG. 17, the audio decoding device 17 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, and a car window. An open / close
information unit 1703 for acquiring open / close information indicating an open / close state and
an audio output unit 104 for outputting audio data are provided.
[0124]
When the encoded audio stream 105 is input to the audio decoding device 17, first, the audio
decoding unit 100 decodes the audio stream 105 to generate audio data, and this audio data is a
gain adjustment unit 101. Is input to
At this time, information indicating that audio data has been generated is notified to the open /
close information unit 1703.
[0125]
The open / close information unit 1703 acquires open / close information indicating the open /
close state of the car window at the time when the notification is received, and transmits the
open / close information to the gain control unit 102.
[0126]
The gain control unit 102 calculates a gain value of audio data according to the received opening
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/ closing information.
Specifically, it is determined that the gain of the audio data should be lowered when the open /
close information indicates the open state of the car window, and the gain of the audio data
should be increased when the open state of the car window is indicated. It is determined that the
gain value corresponding to each case is calculated. Then, the calculated gain value is transmitted
to the gain adjustment unit 101.
[0127]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0128]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0129]
As described above, according to the speech decoding apparatus according to the seventeenth
embodiment, when listening to the speech data output from the speech output unit 104, the
viewer can see the surroundings when the car window is open. In order to take care of people,
the gain (volume) of voice data is lowered and heard, and conversely, when the car window is
closed, it is possible to increase the gain and keep listening in order to maintain the ease of
listening. Sex is increased.
[0130]
Embodiment 18 FIG. 18 is a block diagram showing the configuration of a speech decoding
apparatus 18 according to Embodiment 18 of the present invention.
As shown in FIG. 18, the audio decoding device 18 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
control unit 102 for controlling the gain adjustment unit 101, time information And a voice
output unit 104 for outputting voice data, and a setting unit 1805 which allows the user to
arbitrarily set the gain value of the voice data and the corresponding time zone.
08-05-2019
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[0131]
First, in the setting unit 1805, the gain of voice data is increased in the nighttime (20:00 to 7:00)
by the operation of the user, and the gain is decreased in the daytime (7:00 to 20:00) in advance.
deep.
[0132]
Then, when the encoded audio stream 105 is input to the audio decoding device 18, the audio
decoding unit 100 first decodes the audio stream 105 to generate audio data, and this audio data
is gain-adjusted It is input to the unit 101.
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0133]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the gain control unit 102.
[0134]
The gain control unit 102 calculates a gain value of audio data according to the received time
information and the setting information set by the setting unit 1805.
Specifically, it is determined that the gain of the audio data should be increased if the time
information is night (20:00 to 7:00), and if it is daytime (7:00 to 20:00) It is determined that the
gain of the data should be lowered, and the gain value corresponding to each case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0135]
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31
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0136]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0137]
As described above, according to the speech decoding apparatus according to the eighteenth
embodiment, when listening to the speech data output from the speech output unit 104, the
viewer can obtain the gain of the speech data according to his / her convenience or preference. It
can be adjusted and is very useful.
[0138]
Embodiment 19 FIG. 19 is a block diagram showing the configuration of a speech decoding
apparatus 19 according to Embodiment 19 of the present invention.
As shown in FIG. 19, the audio decoding device 19 includes an audio decoding unit 100 for
decoding an audio stream, a DRC adjustment unit 201 for adjusting dynamic range compression
(DRC) of audio data, and a DRC control for controlling the DRC adjustment unit 201. A section
202, a time information section 103 for acquiring time information, an audio output section 104
for outputting audio data, and a setting section 1805 which allows the user to arbitrarily set a
DRC value of audio data and a corresponding time zone.
[0139]
First, the setting unit 1805 sets the DRC of audio data low at night (20:00 to 7:00) and sets the
DRC high at daytime (7:00 to 20:00) by the user's operation in advance. Keep it.
[0140]
Then, when the encoded audio stream 105 is input to the audio decoding apparatus 19, first, the
audio stream 105 is decoded by the audio decoding unit 100 to generate audio data, and this
08-05-2019
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audio data is DRC adjusted. It is input to the unit 201.
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0141]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the DRC control unit 202.
[0142]
The DRC control unit 202 calculates a DRC according to the received time information and the
setting information set by the setting unit 1805.
Specifically, when time information is night (20:00 to 7:00), DRC of voice data should be set low
(that is, the difference between the maximum voice level and the minimum voice level is large). In
the daytime (7:00 to 20:00), it is determined that the DRC of the audio data should be set high
(so that the level difference becomes small), depending on each case. DRC values are calculated.
Then, the calculated DRC value is transmitted to the DRC adjustment unit 201.
[0143]
The DRC adjustment unit 201 adjusts the DRC value of the audio data output from the audio
decoding unit 100 based on the DRC value, and the adjusted audio data is output to the audio
output unit 104.
[0144]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0145]
08-05-2019
33
Embodiment 20 FIG. 20 is a block diagram showing a configuration of speech decoding
apparatus 20 according to Embodiment 20 of the present invention.
As shown in FIG. 20, the audio decoding device 20 controls an audio decoding unit 100 that
decodes an audio stream, a frequency adjustment unit 301 that adjusts the gain of a specific
frequency domain component of audio data, and a frequency adjustment unit 301. Frequency
control unit 302, time information unit 103 for acquiring time information, audio output unit
104 for outputting audio data, setting unit 1805 in which the user can arbitrarily set the low
frequency component cut amount of audio data and the corresponding time zone Is equipped.
[0146]
First, in the setting unit 1805, the low frequency component of audio data is not cut at night
(20:00 to 7:00), and the low frequency component is cut at daytime (7:00 to 20:00), Set in
advance by user operation.
[0147]
Then, when the encoded audio stream 105 is input to the audio decoding apparatus 20, first, the
audio stream 105 is decoded by the audio decoding unit 100 to generate audio data, and this
audio data is frequency adjusted. It is input to the unit 301.
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0148]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the frequency control unit
302.
[0149]
The frequency control unit 302 calculates the gain value of the low frequency region component
according to the received time information and the setting information set by the setting unit
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1805.
Specifically, if the time information is night (20:00 to 7:00), it is judged that the low frequency
domain component of the audio data should not be cut, and if it is daytime (7:00 to 20:00) It is
determined that the low frequency domain component should be cut in order to calculate the
gain value of the low frequency domain component according to each case.
Then, the calculated gain value of the low frequency region component is transmitted to the
frequency adjustment unit 301.
[0150]
The frequency adjustment unit 301 adjusts the gain value of the low frequency region
component of the audio data output from the audio decoding unit 100 based on the gain value of
the low frequency region component, and the adjusted audio data Are output to the audio output
unit 104.
[0151]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0152]
Embodiment 21 FIG. 21 is a block diagram showing the configuration of a speech decoding
apparatus 21 according to Embodiment 21 of the present invention.
As shown in FIG. 21, the audio decoding device 21 includes an audio decoding unit 100 that
decodes an audio stream, a gain adjustment unit 101 that adjusts the gain of audio data, a gain
control unit 102 that controls the gain adjustment unit 101, time information The time
information unit 103 for acquiring the voice data, the voice output unit 104 for outputting voice
data, and the limit value control unit 2106 that allows the user to arbitrarily set the limit value of
the gain after adjustment.
[0153]
First, in the limit value control unit 2106, the limit value is set in advance by the operation of the
08-05-2019
35
user so that the gain value after adjustment falls within the predetermined range.
[0154]
Then, when the encoded audio stream 105 is input to the audio decoding device 21, first, the
audio stream 105 is decoded by the audio decoding unit 100 to generate audio data, and this
audio data is subjected to gain adjustment It is input to the unit 101.
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0155]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the gain control unit 102.
[0156]
The gain control unit 102 calculates a gain value of audio data according to the received time
information.
Specifically, it is determined that the gain of the audio data should be lowered if the time
information is night (20:00 to 7:00), and if it is daytime (7:00 to 20:00) It is determined that the
gain of the data should be increased, and the gain value corresponding to each case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0157]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the limit
value control unit 2106. .
08-05-2019
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[0158]
The limit value control unit 2106 determines whether the adjusted gain value does not exceed
the set limit value.
Here, when the gain value after adjustment is larger than the limit value, the gain value after
adjustment is readjusted in the direction in which the gain value becomes smaller.
If the adjusted gain value is smaller than the limit value, the adjusted gain value is readjusted in
the direction of increasing.
The audio data readjusted in this manner is output to the audio output unit 104.
[0159]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0160]
In the speech decoding apparatus 21 according to the twenty-first embodiment, a configuration
has been described in which the limit value control unit 2106 is provided to the speech decoding
apparatus 1 according to the first embodiment for adjusting the gain. Instead, for example, the
configuration may be such that the limit value control unit 2106 is provided to the second
embodiment adjusting the DRC, the speech decoding apparatus according to the thirteenth
embodiment adjusting the reproduction speed, or the like.
[0161]
Embodiment 22 FIG. 22 is a block diagram showing the configuration of a speech decoding
apparatus 22 according to Embodiment 22 of the present invention.
As shown in FIG. 22, the audio decoding device 22 includes an audio decoding unit 100 for
decoding an audio stream, a gain adjustment unit 101 for adjusting the gain of audio data, a gain
08-05-2019
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control unit 102 for controlling the gain adjustment unit 101, time information , A voice output
unit 104 for outputting voice data, and a switching unit 2207 which allows the user to arbitrarily
switch whether or not to perform gain adjustment.
[0162]
First, in the switching unit 2207, it is set in advance whether or not the gain adjustment of the
audio data is to be performed according to the time information by the operation of the user.
That is, when it is considered that the user does not need gain adjustment, control can be
performed so as not to perform gain adjustment.
[0163]
Then, when the encoded audio stream 105 is input to the audio decoding device 1, first, the
audio decoding unit 100 decodes the audio stream 105 to generate audio data.
[0164]
Here, when the user sets the switching unit 2207 not to perform gain adjustment, the decoded
audio data is output to the audio output unit 104, and the audio output unit 104 can be used as
audio that can be viewed by the user. It is output.
[0165]
On the other hand, when the switching unit 2207 is set to perform gain adjustment, the decoded
audio data is input to the gain adjusting unit 101.
At this time, information indicating that audio data has been generated is notified to the time
information unit 103.
[0166]
The time information unit 103 acquires time information indicating the time when the
notification has been made, and transmits the time information to the gain control unit 102.
08-05-2019
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[0167]
The gain control unit 102 calculates a gain value of audio data according to the received time
information.
Specifically, it is determined that the gain of the audio data should be lowered if the time
information is night (20:00 to 7:00), and if it is daytime (7:00 to 20:00) It is determined that the
gain of the data should be increased, and the gain value corresponding to each case is calculated.
Then, the calculated gain value is transmitted to the gain adjustment unit 101.
[0168]
The gain adjustment unit 101 adjusts the gain value of the audio data output from the audio
decoding unit 100 based on the gain value, and the adjusted audio data is output to the audio
output unit 104.
[0169]
The audio output unit 104 outputs the input audio data as audio that can be viewed by the user.
[0170]
In the speech decoding apparatus 22 according to the twenty-second embodiment, whether to
perform gain adjustment of speech data according to time information is switched, but the
present invention is not limited to this embodiment. For example, the above-described
embodiment Like 2 to 21 voice decoding devices, according to time information, temperature
information, illuminance information, voice stream genre information, home appliance operation
information, car window opening and closing information, gain of voice data, DRC, low frequency
component It may be switched whether or not to control the reproduction speed.
[0171]
08-05-2019
39
As described above, the present invention is extremely useful and industrially applicable because
it can obtain a highly practical effect of being able to automatically control the output of audio
data according to the surrounding conditions. Is high.
That is, the output control operation can be performed according to the user's preference
without spending time and, for example, it can be applied to consumer audio equipment such as
a DVD player, a television, and a car audio.
[0172]
It is a block diagram which shows the structure of the speech decoding apparatus which
concerns on Embodiment 1 of this invention.
It is a block diagram which shows the structure of the audio | voice decoding apparatus
concerning this Embodiment 2. As shown in FIG.
It is a block diagram which shows the structure of the audio | voice decoding apparatus
concerning this Embodiment 3. As shown in FIG. FIG. 16 is a block diagram showing a
configuration of a speech decoding apparatus according to a fourth embodiment. It is a block
diagram which shows the structure of the audio | voice decoding apparatus concerning this
Embodiment 5. As shown in FIG. FIG. 18 is a block diagram showing a configuration of a speech
decoding apparatus according to a sixth embodiment. Fig. 18 is a block diagram showing a
configuration of a speech decoding apparatus according to a seventh embodiment. Fig. 18 is a
block diagram showing the configuration of a speech decoding apparatus according to an eighth
embodiment. Fig. 18 is a block diagram showing a configuration of a speech decoding apparatus
according to a ninth embodiment. Fig. 24 is a block diagram showing a configuration of a speech
decoding apparatus according to a tenth embodiment. FIG. 24 is a block diagram showing the
configuration of a speech decoding apparatus according to an eleventh embodiment. Fig. 24 is a
block diagram showing a configuration of a speech decoding apparatus according to a twelfth
embodiment. FIG. 26 is a block diagram showing the configuration of the speech decoding
apparatus according to Embodiment 13. Fig. 24 is a block diagram showing a configuration of a
speech decoding apparatus according to a fourteenth embodiment. Fig. 24 is a block diagram
showing the configuration of a speech decoding apparatus according to a fifteenth embodiment.
Fig. 26 is a block diagram showing a configuration of a speech decoding apparatus according to
a sixteenth embodiment. FIG. 24 is a block diagram illustrating the configuration of a speech
decoding apparatus according to a seventeenth embodiment. It is a block diagram which shows
08-05-2019
40
the structure of the audio | voice decoding apparatus based on this 18th Embodiment. Fig. 42 is
a block diagram illustrating the configuration of a speech decoding apparatus according to a
nineteenth embodiment. Fig. 26 is a block diagram showing a configuration of a speech decoding
apparatus according to a twentieth embodiment. FIG. 26 is a block diagram showing the
configuration of the speech decoding apparatus according to Embodiment 21. FIG. 26 is a block
diagram showing the configuration of the speech decoding apparatus according to Embodiment
22. It is a block diagram which shows the structure of the conventional audio | voice decoding
apparatus.
Explanation of sign
[0173]
1 to 22 speech decoding apparatus 100 speech decoding unit 101 gain adjustment unit 102 gain
control unit 103 time information unit 104 speech output unit 105 speech stream 201 DRC
adjustment unit 202 DRC control unit 301 frequency adjustment unit 302 frequency control unit
403 illumination information unit 703 Temperature information unit 1003 Genre information
unit 1301 Speed adjustment unit 1302 Speed control unit 1403 Operation information unit
1703 Opening / closing information unit 1805 Setting unit 2106 Limit value control unit 2207
Switching unit
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