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JP2010057085

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DESCRIPTION JP2010057085
PROBLEM TO BE SOLVED: In an AV system in which a TV receiver and an recorder are
respectively HDMI-connected to an AV amplifier, even when headphones are inserted into the TV
receiver while audio reproduced by the recorder is being output by the AV amplifier, Enables
audio output from headphones. SOLUTION: When it is detected that a headphone is inserted in a
TV receiver, when audio is outputted from an AV amplifier, control information to switch an
output destination of audio data is sent from the TV receiver to the AV. Send to amp. The AV
amplifier switches the output destination of the audio data input from the recorder from the
speaker output unit to the TV receiver according to the control information. [Selected figure]
Figure 2
TV receiver and control method thereof
[0001]
The present invention relates to a TV receiver connectable to an AV amplifier and a control
method thereof.
[0002]
There is HDMI (high definition multimedia interface) as a communication standard for
transmitting digital signals such as video and audio between AV devices.
The HDMI standard includes CEC (Consumer Electronics Control) which is a command
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1
transmission / reception function of mutual device control. 2. Description of the Related Art In
recent years, a system in which a TV receiver, an AV amplifier, and a recorder are connected by
using HDMI and a remote controller of the TV receiver can be used to control each device by CEC
is spreading. As shown in FIG. 12A, the remote control of the TV receiver is used to switch and
control whether the audio signal from the recorder is to be output by the speaker of the TV
receiver or the speaker of the AV amplifier. be able to.
[0003]
Further, as shown in FIG. 12 (b), a mode in which a TV receiver and an AV amplifier are
connected to the recorder is also possible, but when connected by HDMI, the connection mode of
FIG. 12 (a) is desirable. Patent Document 1 below describes an AV apparatus having the system
configuration of FIG. 12 (b). It is described that the recorder which is the transmission source
reads the information on the audio output stored in the EDID memories of both the TV receiver
and the AV amplifier, and switches the output destination of the audio signal. JP 2007-267116 A
[0004]
Conventionally, since there are two audio output destinations, the TV receiver and the AV
amplifier, there have been cases where an erroneous operation is performed when listening with
headphones. That is, when the audio is being output from the AV amplifier, the audio is not
output because the headphone is mistakenly inserted into the headphone terminal of the TV
receiver. In particular, in the case of a separate type in which the display panel of the TV receiver
and the tuner unit are separately configured, the tuner unit is often arranged side by side with
the AV amplifier, so the above-mentioned erroneous operation tends to occur.
[0005]
An object of the present invention is to provide a TV receiver capable of audio output even in the
case where the insertion destination of a headphone is mistaken in view of the above-mentioned
problems.
[0006]
The TV receiving apparatus according to the present invention is a TV receiving apparatus
connectable to an audio output apparatus that performs signal processing on input audio data
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and outputs the audio, and detects headphones' insertion and removal and outputs the audio
data to the headphones. And output means, communication means for communicating with the
audio output device, and control means for controlling the audio output device using the
communication means, the control means detecting the insertion of a headphone. And controlling
the audio output device to output audio data input by the audio output device to a TV receiver.
[0007]
According to the present invention, the user can listen to the audio through the headphone
inserted in any of the TV receiver and the AV amplifier without being aware of the audio output
state of the TV receiver and the AV amplifier.
[0008]
Hereinafter, embodiments of the present invention will be described.
[0009]
FIG. 1 is a block diagram of an AV system according to a first embodiment of the present
invention.
This system comprises a TV receiver 100, an AV amplifier 200 as an audio output device, and a
recorder 300 as a video reproduction device.
The video reproduction apparatus may be a personal computer or a game machine.
The TV receiver 100 is connected to the AV amplifier 200 by an HDMI cable capable of
transmitting and receiving control information such as audio data and CEC commands.
However, audio data is transmitted in one direction from the AV amplifier 200 to the TV receiver
100, and control information is transmitted and received in both directions. The TV receiver 100
and the AV amplifier 200 may be connected via a wireless communication I / F such as wireless
HDMI. Also, transmission of audio data from the TV receiver 100 to the AV amplifier 200 is
performed via a digital audio cable such as an optical digital audio cable or a coaxial digital audio
cable. The recorder 300 and the AV amplifier 200 are also connected by an HDMI cable or
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wireless communication means.
[0010]
FIG. 2 is a block diagram of the TV receiver 100. As shown in FIG.
[0011]
The tuner unit 101 receives a broadcast signal, performs demodulation processing on the
selected broadcast signal according to a channel selection instruction from the control unit 109,
generates a transport stream (TS), and transmits the stream to the decoding unit 102. Output.
[0012]
The decoding unit 102 separates the TS into video data, audio data, and information data, and
performs decoding processing respectively.
The decoded video data is output to the image processing unit 112, and the audio data is output
to the audio processing unit 103.
That is, audio data multiplexed into a broadcast signal is separated by a demultiplexer (not
shown) and decoded to be uncompressed data.
[0013]
The audio processing unit 103 (audio processing means) performs audio processing such as
sound quality, presence, etc. and sound processing such as volume processing on the decoded
audio data, and outputs the audio data subjected to audio processing to the audio switching unit
104 Do. The audio processing includes a pseudo-surround process, a process of emphasizing
bass, a process of clarifying speech, and the like.
[0014]
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The voice switching unit 104 (switching means) switches an output path of voice data according
to an instruction from the control unit 109 (control means). Audio data is selectively output to
the speaker output unit 105, the headphone (or earphone) output unit 106 (headphone output
unit), and the digital audio output unit 107 (audio data output unit).
[0015]
The audio data output to the speaker output unit 105 is subjected to D / A conversion and
amplification processing, and is output to a speaker attached to the TV receiver 100.
[0016]
The audio data output to the headphone output unit 106 is subjected to D / A conversion and
amplification processing, and output to the headphone terminal.
The headphone output unit 106 has means for detecting the insertion and removal of
headphones, and when the state of insertion and removal changes, notifies the control unit 109
of that.
[0017]
The audio data output from the audio switching unit 104 is selectively input to the digital audio
output unit 107, and output from the digital audio output terminal connected to the digital audio
output unit 107.
[0018]
Audio data formats include PCM (Pulse Code Modulation) and AAC (Advanced Audio Coding).
In the case of audio data in the encoded format, the audio data may be directly output to the
digital audio output unit 107 without passing through the decoding unit 102 or the audio
processing unit 103. The digital audio output terminal mainly refers to an optical digital audio
output terminal or a coaxial digital audio output terminal, but is not limited to this, and may be,
for example, an analog output terminal. The digital audio output terminal is connected to the AV
amplifier 200.
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[0019]
The HDMI I / F unit 108 (communication means) is an interface for connecting an external
device with the HDMI. External device authentication and copy control, transmission and
reception of control information for external device control, and reception of video data and
audio data are performed via the DDC line / TDMS line / CEC line.
[0020]
Based on the remote control code received by remote control reception unit 110, control unit
109 transmits and receives a CEC command for external device control via HDMI I / F unit 108
in addition to normal television control such as channel selection and input switching. . By
transmitting the CEC command, control is performed to output audio from the speaker of the AV
amplifier 200 without using the speaker of the TV receiver 100. Furthermore, the control unit
109 also performs switching control of the output path of audio data based on the headphone
insertion / removal information from the headphone output unit 105 and the information stored
in the memory unit 111.
[0021]
The memory unit 111 stores channel information and user setting information. The user setting
information is speaker setting information that is output with priority when viewing a broadcast
program or reproducing content from the recorder 300. The speakers include a speaker attached
to the TV receiver 100 and a speaker attached to the AV amplifier 200. Furthermore, the user
setting information includes operation setting information at the time of headphone insertion,
such as whether the speaker is muted and audio is output only from the headphone when the
headphone is inserted, or audio is output to both the speaker and the headphone. The image
processing unit 112 performs image processing such as contrast adjustment, color correction,
contour correction, noise removal, luminance correction, tone correction, edge emphasis, and
white balance correction on the video data.
[0022]
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The display unit 113 displays a video based on the video data processed by the image processing
unit 112. The display unit 113 may be disposed separately from the TV receiver 100.
[0023]
FIG. 3 is a block diagram of the AV amplifier 200. As shown in FIG.
[0024]
The digital audio input unit 201 receives audio data output from the digital audio output unit
107 of the TV receiver 100.
[0025]
The decoding unit 202 performs a decoding process on the encoded audio data.
[0026]
The audio processing unit 203 performs sound quality processing, surround processing, and
volume processing on the audio data output from the decoding unit 202.
[0027]
The voice switching unit 204 switches the output path of the voice data according to an
instruction from the control unit 208.
The audio switching unit 204 selectively outputs audio data to the speaker output unit 205
(audio output unit) and the headphone output unit 206.
[0028]
The speaker output unit 205 performs D / A conversion and amplification processing on the
audio data output from the audio switching unit 204, and outputs the audio data to a speaker
attached to the AV amplifier 200.
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The sound can be output by a speaker of 5.1 channels or more, and as a speaker system, in
addition to the LR speaker, a rear speaker, a center speaker, and a subwoofer speaker are
included.
[0029]
The headphone output unit 206 performs D / A conversion and amplification processing on the
audio data output from the audio switching unit 204, and outputs the audio data to a headphone
(or earphone) terminal attached to the AV amplifier 200.
[0030]
The HDMI I / F unit 207 (output control unit) is an interface for connecting an external device
with the HDMI.
In the present embodiment, the TV receiver 100 and the recorder 3 are connected as external
devices.
[0031]
When the control unit 208 receives a CEC command for input switching from the TV reception
apparatus 100 via the HDMI I / F unit 207, the control unit 208 receives audio data input from
the HDMI I / F unit 207 and the digital audio input unit 201. It switches with the voice data to be
input.
Audio based on the switched audio data is output from the speaker system attached to the AV
amplifier 200.
In this embodiment, the audio data input from the HDMI I / F unit 207 is audio data reproduced
by the recorder 300, and the audio data input from the digital audio input unit 201 is input from
the TV receiver 100. Voice data.
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[0032]
FIG. 4 is a block diagram of the recorder 300. As shown in FIG.
[0033]
The disk drive unit 301 reads video and audio data from various media.
ここでメディアとは、DVDやブルーレイ、ハードディスクなどである。
[0034]
The decoding unit 302 decodes the video / audio data when the video / audio data read by the
disk drive unit 301 is encoded.
[0035]
The multiplexing unit 304 converts the audio data output from the audio processing unit 303
and the video data output from the image processing unit 306 into a format compliant with the
HDMI standard, and multiplexes the converted data.
[0036]
The HDMI I / F unit 305 is an interface for connecting the AV amplifier 200 with the HDMI.
The HDMI I / F unit 305 conforms to the HDMI standard, and acquires each piece of device
information from the TV receiving apparatus 100 or the AV amplifier 200 at a predetermined
timing such as at the time of reproduction.
The device information is stored in an Extended Display Identification Data (EDID) memory
disposed in the TV receiver 100 or the AV amplifier 200. The device information includes a
corresponding display format, a corresponding audio format, lip sync information, and the like.
[0037]
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The image processing unit 306 applies predetermined image processing to video data.
[0038]
The control unit 307 controls reproduction of video and audio data based on a CEC command
input via the HDMI I / F unit 305 and device information.
[0039]
FIG. 5 is a flowchart showing the operation of the TV receiving apparatus 100 when headphones
are inserted into the TV receiving apparatus 100 while the recorder 300 is reproducing video
and audio.
[0040]
The headphone output unit 106 monitors a change in insertion / removal of headphones to the
headphone terminal while the TV receiver 100 is activated (S301).
If there is no change in insertion or removal, the monitoring is continued.
If there is a change in insertion or removal, the control unit 109 is notified of the information on
the insertion or removal.
If the control unit 109 determines that the headphone insertion / removal state has changed, the
control unit 109 acquires user setting information from the memory unit 111 (S302). The user
setting information to be acquired is an audio output setting at the time of headphone insertion.
The user settings include at least the following two settings. One is a first setting in which the
speaker is muted and only the headphone is output when the headphone is inserted, and the
other is a second setting in which both the speaker and the headphone are output. The
acquisition of the user setting information may be, for example, the timing of activation of the TV
receiver or the update of the user setting, in addition to the timing of headphone insertion and
removal.
[0041]
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Thereafter, the control unit 109 confirms the voice output state (S303). There are two audio
output states: an audio output from the TV receiver 100 and an audio output from the AV
amplifier 200. In the case of audio output from the TV receiver 100, the control unit 109
instructs the audio output unit 104 to switch audio output. The audio switching unit 104
switches the audio output from the TV receiver 100 from the speaker output to the headphone
output in accordance with the audio output switching instruction. Alternatively, depending on the
user setting, in addition to the speaker output, it is also output to the headphone (S304). In the
case of audio output from the AV amplifier 200, the control unit 109 switches the speaker output
from the AV amplifier 200 to the headphone output from the TV receiver 100. Alternatively,
according to the user setting, in addition to the speaker output, it is also output to the headphone
(S305).
[0042]
FIG. 6 is a flowchart showing a flow of the TV-to-amplifier audio switching process (S305). First,
the flow on the TV receiver 100 side will be described. When the control unit 109 determines
that the audio data from the AV amplifier 200 is output (S 303), the control unit 109 transmits a
CEC command of input switching to the AV amplifier 200 of the connection destination via the
HDMI I / F unit 108. (S401). Since the AV amplifier 200 receives the audio data from the
recorder 300, the AV amplifier 200 switches the input state of the AV amplifier 200 to the audio
data output from the digital audio output unit 107 of the TV receiver 100. That is, the video /
audio data output from the recorder 300 passes through the AV amplifier 200 and is input to the
TV receiver 100.
[0043]
The control unit 109 monitors input of audio data from the HDMI I / F unit 108 (S402). When
the input of the audio data is confirmed, the control unit 109 performs output processing to the
headphones (S403). The control unit 109 switches the input to the decoding unit 102 from the
tuner unit 102 to the HDMI I / F unit 108, and instructs the sound switching unit 104 to output
to the headphone output unit 106. At the same time, the control unit 109 also instructs the voice
switching unit 104 to output to the digital voice output unit 107. In the case where audio data is
output at all times from the digital audio terminal of the TV receiver 100, the process of
switching the output to the digital audio output unit 107 is unnecessary. The control unit 109
separates the process according to the user setting information (S404). If the user setting is the
second setting, this flow ends. If the user setting is the first setting, the control unit 109 mutes
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the audio data output from the digital audio output unit 107 (S405). At this time, the audio data
output from the speaker output unit 205 is muted by stopping the processing of the audio data
input to the AV amplifier 200 by the CEC command without muting the output from the digital
audio output unit 107. Also good.
[0044]
On the other hand, as a flow on the AV amplifier 200 side, when the control unit 208 receives a
CEC command for input switching from the TV receiver 100 via the HDMI I / F unit 207 (S406),
the input switching process according to the command (S407).
[0045]
FIGS. 7 (a) to 7 (c) are diagrams showing changes in the audio path according to the processes of
FIGS. 5 and 6. FIG.
FIG. 7A shows an audio output state before the headphones are inserted, and schematically
shows how audio data of the recorder 300 is audio output from a speaker connected to the AV
amplifier 200. There is. FIG. 7B shows the audio output state in the case where the user setting at
the time of headphone insertion is the first setting (headphones only output). The AV amplifier
200 switches the audio input to the recorder 300 from the TV receiver 100 based on the CEC
command for input switching from the TV receiver 100. Furthermore, the audio data input from
the recorder 300 is transmitted to the TV receiver 100 through. The TV receiver 100 outputs the
audio data received from the recorder 300 via the AV amplifier 200 to headphones.
[0046]
FIG. 7C shows an audio output state in the case where the user setting at the time of inserting the
headphone is the second setting (both the speaker and the headphone are output). The TV
receiver 100 outputs the audio data received via the AV amplifier 200 to the headphones and
outputs the same audio data to the AV amplifier 200 from the digital audio output terminal. The
AV amplifier 200 is in a state of inputting audio data from the digital audio output terminal in
advance, and outputs audio based on the audio data from the speaker.
[0047]
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On the other hand, when a headphone is inserted into the AV amplifier 200, the audio data is
output to the headphone output unit 206 without the above-described path change process of
audio data, and listening with the headphone becomes possible.
[0048]
As described above, according to the present embodiment, even when headphones are inserted
into any of the TV receiver 100 and the AV amplifier 200, it becomes possible to listen to audio
using headphones regardless of the audio output state.
Furthermore, in the present embodiment, CEC commands conforming to the standard are used.
That is, since it does not depend on the vendor command, it can be implemented universally by
the combination of many TV receivers and AV amplifiers.
[0049]
FIG. 8 is a block diagram of an AV system according to a second embodiment of the present
invention. A connection cable is provided to transmit audio data for audio output from the center
speaker of the TV receiver 400 from the AV amplifier 200. FIG. 9 is a block diagram of a TV
receiver 400 according to a second embodiment of the present invention.
[0050]
The second embodiment is the same as the first embodiment except that the center speaker input
unit 414 (center speaker input unit) is provided. The center speaker audio data is output from
the AV amplifier 200 and input through the center speaker input unit 414 connected to the
center speaker terminal. Then, after predetermined signal processing is performed in the audio
processing unit 403, the signal is output from the speaker output unit 405 through the audio
switching unit 404.
[0051]
FIG. 10 is a flowchart showing an operation when headphones are inserted into the TV receiver
400 in the present embodiment.
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[0052]
The headphone output unit 406 monitors a change in connection / disconnection to the
headphone terminal while the TV receiver 400 is activated (S501).
If there is no change, continue monitoring. If there is a change, information on the insertion or
removal is notified to the control unit 409. If the control unit 409 determines that the headphone
insertion / removal state has changed, the control unit 409 acquires the same user setting
information as in the first embodiment from the memory unit 411 (S502). The acquisition of the
user setting information may be performed at the time of starting the TV or at the time of
updating the user setting.
[0053]
As in the first embodiment, the control unit 409 confirms the voice output state (S 503). In the
case of audio output from the TV receiver 400, the control unit 409 instructs the audio output
unit 404 to switch audio output. The audio switching unit 404 switches the audio output in the
TV receiver 400 from the speaker output to the headphone output or adds it to the speaker
output according to the switching instruction and performs output from the headphone (S504).
In the case of audio output from the AV amplifier 200, the control unit 409 confirms whether
audio data is input from the center speaker input unit 414 (S505). The control unit 409 switches
the speaker output from the AV amplifier 200 to the headphone output from the TV receiver 400
or adds the above-mentioned headphone output in addition to the above-described speaker
output. (S506)。 The flow of the TV-amplifier audio switching process is the same as that
of the first embodiment. Further, the control unit 409 determines whether or not the surround
processing is possible according to the presence or absence of the input from the center speaker
terminal (S507). Here, when there is no input signal from the center speaker terminal, the
processing is ended as it is. On the other hand, when there is an input signal from the center
speaker terminal, it is determined that the surround sound has been output by the AV amplifier
200 before the headphone is inserted. The audio processing unit 403 is instructed to perform
surround processing on the audio data input from the HDMI I / F unit 408 (S508). The surround
processing here is pseudo surround processing, and is processing such that the sound of 2ch
output from the headphones can be virtually heard as sound of a plurality of chs.
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[0054]
According to this embodiment, it is possible to continue the surround effect applied at the time of
listening with the speaker before inserting the headphone when listening with the headphone.
[0055]
The configuration of the AV system according to the third embodiment of the present invention
is the same as that of the first embodiment.
The difference from the first embodiment is that the audio processing in the TV receiver 100 is
made different depending on whether the audio data output from the AV amplifier 200 is
subjected to the surround processing. FIG. 11 is a flowchart showing in detail the TV-to-amplifier
audio switching process in this embodiment. The flow on the TV receiver 100 side will be
described. If it is determined that the audio data from the AV amplifier 200 is output, the control
unit 109 sends a CEC command for input switching to the AV amplifier 200 of the connection
destination via the HDMI I / F unit 108 (S601) ). The AV amplifier 200 receives audio data from
the recorder 300. The TV receiver 100 issues the command for switching the input state of the
AV amplifier 200 to the input of the audio output from the digital audio terminal of the TV
receiver 100.
[0056]
The control unit 109 acquires output information of the speaker sound from the AV amplifier
200 (S602). This process may be performed before S601. The output information is information
as to whether or not surround processing is being performed, and information as to whether or
not sound is output from the speaker. When it is determined that the audio data subjected to the
surround processing by the AV amplifier 200 is output to the speaker, the control unit 109
instructs the audio processing unit 103 to perform the surround processing (S604). The control
unit 109 monitors input of audio data from the HDMI I / F unit 108 (S605). When the input of
the audio data is confirmed, the control unit 109 performs output processing to the headphones
(S606). As in the first embodiment, the control unit 109 divides the processing according to the
user setting information (S607).
[0057]
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Next, the flow on the AV amplifier 200 side will be described. When the control unit 208 receives
a CEC command for input switching from the TV receiving apparatus 100 via the HDMI I / F unit
207 (S609), the control unit 208 performs input switching processing according to the command
(S610). At that time, the control unit 208 determines whether or not the audio data is subjected
to surround processing (S611), and when the surround processing is performed, the control unit
208 transmits that effect to the TV receiver 100 (S612). The other process flow is the same as
that of the first embodiment.
[0058]
In this embodiment, the surround processing is performed by the audio processing unit 103 of
the TV receiver 100, but the audio processing unit 203 of the AV amplifier 200 is performed to
transmit the surround-processed audio data to the TV receiver 100. It is also good.
[0059]
According to this embodiment, regardless of the connection state of the center speaker sound, it
is possible to continue the surround effect applied at the time of listening with the speaker before
inserting the headphone when listening with the headphone.
[0060]
FIG. 1 is a block diagram of an AV system according to the present invention.
It is a block diagram of TV receiver concerning the present invention.
FIG. 1 is a block diagram of an AV amplifier according to the present invention. FIG. 1 is a block
diagram of a recorder according to the present invention. It is a flowchart of the audio | voice
switching process accompanying headphone insertion which concerns on this invention. It is a
flowchart of the audio | voice switching process between TV-amplifiers which concerns on this
invention. It is explanatory drawing which showed the audio path at the time of headphone
insertion which concerns on this invention. It is a block diagram of another AV system based on
this invention. FIG. 6 is a block diagram of another TV receiver according to the present
invention. It is a flowchart of the audio | voice switching process accompanying the other
headphone insertion which concerns on this invention. It is a flowchart of other TV-amplifier
audio switching processing according to the present invention. It is a schematic diagram which
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shows the example of a connection of TV receiver, AV amplifier, and a recorder.
Explanation of sign
[0061]
100, 400 TV receiver apparatus 101 tuner unit 102 decode unit 103 audio processing unit 104
audio switching unit 105 speaker output unit 106 headphone output / detection unit 107 digital
audio output unit 108 HDMI I / F unit 109 control unit 110 remote control receiver 111
memory Unit 112 Image processing unit 113 Display unit 200 AV amplifier 201 Digital audio
input unit 202 Decoding unit 203 Audio processing unit 204 Audio switching unit 205 Speaker
output unit 206 Headphone output unit 207 HDMI I / F unit 208 Control unit 300 Recorder 301
Disk drive unit 302 Decoding unit 303 Audio processing unit 304 Multiplexing unit 305 HDMI I
/ F unit 306 Image processing unit 307 Control unit 414 Center speaker input unit
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