close

Вход

Забыли?

вход по аккаунту

?

JPH042300

код для вставкиСкачать
Patent Translate
Powered by EPO and Google
Notice
This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
complete, reliable or fit for specific purposes. Critical decisions, such as commercially relevant or
financial decisions, should not be based on machine-translation output.
DESCRIPTION JPH042300
[0001]
FIELD OF THE INVENTION The present invention relates to a headphone reproducing apparatus
for realizing localization outside a head of a sound image in headphone reproduction in a
television or the like. Prior Art FIG. 5 is a block diagram of a conventional headphone
reproduction apparatus. In FIG. 4, 1 is a sound reproducing apparatus for reproducing an audio
signal, 2 is an amplifier for amplifying the audio signal, and 3 is a headphone. In FIG. 5, an
acoustic signal output from the acoustic reproduction device 1 is amplified through the amplifier
2 and is independently reproduced on the left and right ears by the headphones 3. Problems to
be Solved by the Invention However, in the configuration as described above, as well known, the
sound image generated by the acoustic signal is generated in the head, there is a sense of
unnaturalness, and therefore fatigue is increased. I had it. The present invention has been made
in view of the above problems, and provides a headphone reproduction device that realizes
localization outside the head of a sound image also in headphone reproduction and can perform
reproduction similar to that in normal speaker reproduction. Means for Solving the Problems In
order to solve the above problems, the headphone reproducing apparatus of the present
invention comprises an image sound reproducing means for reproducing an audio signal and an
image signal synchronized therewith, and an image for monitoring the reproduced image signal.
Reflected sound generation that determines whether this sound signal is a stereo signal or a
monaural signal from the reproduction means and the reproduced sound signal, and generates
spatially reflected sound and crosstalk signal suitable for each signal from the judgment result
Means, phase control means for controlling the phase of the output signal of the reflected sound
generation means, addition means for adding the output signal of the phase control means and
the acoustic signal, acoustic signals output from the addition means left and right ears It has
headphones to play independently. The present invention adds visual effects by reproducing an
image synchronized with an audio signal simultaneously with an audio signal according to the
10-05-2019
1
above configuration, and further generates a reflected sound in a room, which occurs in normal
speaker reproduction and does not occur in headphone reproduction. By compensating the
spatial loss-talk signal at the time of headphone reproduction, it is possible to localize the sound
image outside the head in headphone reproduction. Embodiment A headphone reproduction
apparatus according to an embodiment of the present invention will be described with reference
to the drawings. FIG. 1 is a block diagram of a headphone reproduction apparatus according to
an embodiment of the present invention. In FIG. 1, 5 is a video decoder for reproducing two
audio signals and a video signal synchronized therewith, 6 is a television for monitoring video, 7
is an addition circuit for adding input signals, and 8.9 is a video decoder 5 for reproduction.
Sound generation circuit for generating a spatially reflected sound for the right ear and for the
left ear that is suitable for each signal, and 10.11 is the generated reflected sound A phase
control circuit for controlling the phase, an adder circuit 12.13 for adding the acoustic signal and
the reflected sound subjected to the phase control, and a headphone 14 for reproducing the
input acoustic signal independently on the left and right ears.
The operation of the headphone reproduction apparatus according to the present embodiment
configured as described above will be described using the drawings. First, two audio signals and
two audio signals from which a video signal synchronized with this audio signal is reproduced by
the video deck 5 are two signals for Ishikawa and left for a stereo signal, and the same signal for
a monaural signal. Indicates that two are output. The video signal is input to the television 6 and
the video is reproduced. Also, the two acoustic signals are input to the adder 7 and added. Next,
the added signal is input to the reflected sound generation circuit 8.9 to generate a reflected
sound. Here, the reflected sound refers to a reflected sound from a wall or the like generated
when the input signal is reproduced by a speaker in a normal lighting room. At this time, the
reflected sound generation circuit 8.9 determines the stereo or monaural state by looking at the
level of the difference between the two audio signals reproduced from the video decoder 5, and
the reflected sound suitable for each is generated. FIG. 2 shows a specific example of the portion
for generating the reflected sound in the reflected sound generation circuit 8.9. In FIG. 2, 24 is a
delay element (.tau.1 to .tau.n: delay time) for delaying the signal by a given time, and 25 is a
multiplier (Al.about.An) for multiplying the output signal of each delay element by a certain
value. : Multiplication value), 30 is an adder. The value of the multiplier and the delay time of the
delay element are determined from the result of actually measuring the structure of the reflected
sound in a normal lighting room or the like, and the reflected sound structure obtained by
computer simulation. For example, FIG. 3 shows a reflected sound structure obtained by
computer simulation, in which the vertical axis is amplitude and the horizontal axis is time. As
shown in FIG. 3, when the delay time of the reflected sound is T1 to T4 and the amplitude is 81
to B4, .tau.1 = T1, AI = 81.tau.2 = 72-T1, A2 = B2.tau.3 = T 3-T2, A3. It sets with = B3 (tau) 4 =
T4-T3 and A4 = B4. The output signal of the reflected sound generation circuit 8.9 is input to the
phase control circuit 10.11. In this phase control circuit 10.11, phase control is performed so
that there is no correlation between the signals of Ishikawa and the left side. For example, when
10-05-2019
2
this phase control is simply performed, the signal input to the phase control circuit 11 is
multiplied by (-1) to invert the phase. It is possible to localize the sound image out of the head
only by this operation. At this time, naturally, the effect is the same even if the phase of
Ishikawa's signal is reversed. The output signals of the phase control circuit 10.11 are
respectively input to the adder circuit 12.13, and are respectively added to the two acoustic
signals reproduced by the video decoder 5.
The summed signals are respectively emitted to the ears by the headphones 14. Note that the
reflected sound generation circuit 8.9 that generates the reflected sound is a more usual speaker
reproduction by adding a reverberation signal that is created by combining circuits in which the
input signal is fed back like an all-pass filter as shown in FIG. It is close to the state of the, and
the effect is more pronounced. In FIG. 4, 31.35.36 is a multiplier, 32.33 is an adder, and 34 is a
delay unit. Also, g in the figure represents a gain, and ? represents a delay time. In the present
embodiment, the determination of the monaural and stereo of the acoustic signal in the reflected
sound generation circuit is made to look at the level of the difference between the two signals,
but when using television broadcasting, the monaural included in the FM signal is used. The
decision is made using the stereo decision signal. As described above, according to the present
invention, the sound signal and the image sound reproducing means for reproducing the image
signal synchronized with the sound signal, the image reproducing means for monitoring the
reproduced image signal, and the reproduced sound signal Reflected sound generation means for
judging whether an acoustic signal is a stereo signal or a monaural signal, and generating a
spatially reflected sound and crosstalk signal suitable for each signal from the judgment result,
and a phase of an output signal of the reflected sound generation means Control means for
controlling phase control means, addition means for adding the output signal of the phase
control means and the acoustic signal, and headphones for reproducing the sound signal
outputted from the addition means separately to the left and right ears By simultaneously using
an image signal synchronized with the video signal, and by adding a signal such as a reflected
sound and crosstalk, in a normal speaker reproduction. Condition was reproduced during
headphone reproduction, it becomes possible to realize a head outside lateralization in
headphone reproduction.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram of a headphone reproduction apparatus according to an embodiment of
10-05-2019
3
the present invention, FIGS. 2 and 3 illustrate a reflected sound generation circuit according to an
embodiment of the present invention, and FIG. 4 is a block diagram of an allpass filter. FIG. 5 is a
block diagram of a conventional headphone reproduction apparatus.
5 иии Video и и и и и и и и и и и и и и и и и и и и и и и и и Video и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и
Video и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и и reflected sound generation circuit 10.11. Work 3
ииииииииииииииииииииииииииииииии Headphones. Name of the agent Attorney Attorney Shigetaka Hagino 1 person
Figure 1 p calculation 4 figure 4
10-05-2019
4
Документ
Категория
Без категории
Просмотров
0
Размер файла
12 Кб
Теги
jph042300
1/--страниц
Пожаловаться на содержимое документа