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JP2004343293

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DESCRIPTION JP2004343293
The present invention provides an image / sound reproducing apparatus capable of giving a
more realistic feeling when reproducing a moving image together with sound data in which a
short distance sound and a far distance sound are separately recorded. When reproducing a
moving image together with audio data in which short distance audio and far distance audio are
separately recorded, the image audio reproduction device 10 performs signal processing on the
image data to generate an image according to the reproduction zoom operation. To enlarge or
reduce the size of the image signal 114. In addition, the left audio signal 128, the right audio
signal 130, and the far-field audio are adjusted so that the volume balance of the near-field audio
and the far-field audio changes in accordance with the playback zoom operation. A signal 132 is
generated. The audio signals 128, 130 and 132 are subjected to synthesis processing in the
mixing circuit 30, and the left output audio signal 134 and the right output audio signal 136 are
output to realize realistic moving image reproduction. [Selected figure] Figure 1
Image and audio reproduction device
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
image / sound reproducing apparatus capable of reproducing a moving image together with
sound data in which sounds of near and far distances are separately recorded. 2. Description of
the Related Art Conventionally, in order to reproduce a moving image with a sense of realism, for
example, when photographing an image and sound of a subject and recording the moving image,
the subject is provided with a zoom mechanism. There are known video camera devices that
zoom in or zoom out. At this time, it has a built-in microphone built into the device and an
external microphone placed near the subject. When the zoom magnification is high, more voices
near the subject are recorded, and when the magnification is low, the device near the device By
recording more voices, it is possible to perform voice recording that matches the image, and
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when playing back this video, the balance between the voice in the vicinity of the device and the
voice in the vicinity of the subject changes in accordance with zooming. It is possible to play
more realistic voices (Patent Document 1). [0003] Japanese Utility Model Application Publication
No. 5-48477. SUMMARY OF THE INVENTION The video camera device described in the abovementioned Patent Document 1 changes the balance between the sound in the vicinity of the
device and the sound in the vicinity of the subject in accordance with the zooming at the time of
shooting. Therefore, the sound matched to the image is reproduced. However, the point at which
the image and the sound coincide with each other by this zoom is constant. For example, even if
the zoom operation is performed on the reproduced image, the sound does not respond to the
zoom operation, and There is no change in the balance with the sound in the vicinity of the
subject, that is, the far-distance sound. Thus, although it can pick up near-field and far-field
voices, it may not be used effectively. The present invention overcomes the drawbacks of the
prior art and can provide more realistic feeling when reproducing a moving image together with
audio data in which short-distance voice and long-distance voice are separately recorded. An
object of the present invention is to provide an image / sound reproduction device. SUMMARY
OF THE INVENTION According to the present invention, image data and near-field sound data in
which the sound on the front side is recorded in the object field of the image data and sound on
the back side are recorded. A signal processing means for generating an image signal and a first
audio signal and a second audio signal respectively from the image data and the short distance
audio data and the far distance audio data when reproducing distance audio data; The image /
sound reproducing apparatus includes an operation means for operating the enlargement and
reduction of the image represented by the image data, the first sound signal and the second
sound signal, and outputs a third sound signal. Audio signal synthesizing means, which changes
the image represented by the image data in response to the operation of the operation means,
and generates an image signal; Short-range audio data and by changing the speech represented
by the long-distance audio data, and generates the first audio signal and second audio signal,
respectively.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, referring to the attached
drawings, embodiments of an image and sound reproducing apparatus according to the present
invention will be described in detail. In the present embodiment, the sound reproduced by the
image and sound reproducing apparatus includes long-distance sound recorded at the far side of
the object scene, and left and right sound at a short distance recorded at the near side of the
object scene. Audio is used, and two channels are output in stereo corresponding to these three
channel inputs. However, according to the present invention, it is only necessary to correspond
to at least two channels of far-field voice and near-field voice, so one-channel voice may be
output as one channel of near-field voice. Also, for far-field voice, two channels of left voice and
right voice may be provided to increase input voice. Along with these, the number of audio signal
amplifiers and loudspeakers is changed. Further, according to the present invention, at the time
of moving image reproduction, the subject is zoomed up or down according to the reproduction
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zoom operation, and the image is enlarged or reduced and displayed. For example, when the
operator operates the reproduction zoom operation device 44, as shown in FIGS. 2 and 4, when
the reproduction zoom position 46 is set to the tele (T) position direction with respect to the
standard state 48, the image 40 is displayed. When the subject 42 in is zoomed up to be in the
wide (W) position direction, the subject 42 is zoomed out and displayed. When the reproduction
zoom position 46 is on the standard state 48, the subject 42 is displayed without zooming up and
down. As shown in FIG. 1, the image and sound reproducing apparatus 10 according to the
embodiment performs signal processing on the image and sound data recorded in the
information recording medium 18 in a signal processing unit (Digital Signal Processor: DSP) 16,
An image signal is output, and an audio signal is converted to an analog audio signal by a digital
/ analog (D / A) converter 22, and amplified or attenuated by the left audio signal amplifier 24,
the right audio signal amplifier 26, and the far-field audio signal amplifier 28. The main control
unit 14 controls the signal processing unit 16 and each sound according to the state of the
reproduction zoom operation in the operation unit 12 during the reproduction. It is an apparatus
for changing the image signal and the audio signal to be output by controlling the signal
amplifiers 24, 26 and 28. In the present embodiment, the image signal output as described above
is displayed on the image display unit 20, and the audio signal is produced by the left
loudspeaker 32 and the right loudspeaker 34.
Note that parts not directly related to the understanding of the present invention are not shown
and redundant explanations are avoided. The operation unit 12 has a function of outputting an
operation signal 102 in accordance with the manual operation state of the operator, and includes
a reproduction zoom operation device 44 in the present embodiment. The reproduction zoom
operation device 44 sets the reproduction zoom position 46 with respect to the standard state
48, and outputs an instruction of zoom up reproduction or zoom down reproduction according to
the operation zoom signal according to the reproduction zoom position 46. For example, as
shown in FIGS. 2 and 4, when the playback zoom position 46 is from the standard state 48 to the
tele (T) position side, zoom-up playback is instructed, and when from the standard state 48 to the
wide (W) position side, zoom is performed. Instructs you to play down. In addition, the
reproduction zoom operation device 44 may set the reproduction zoom position 44 by, for
example, a button instructing zoom-up and zoom-down. In the following description, each signal
is identified by the reference numeral of the connection line where it appears. The main control
unit 14 is a control function unit that controls and controls the overall operation of the
apparatus, and for example, a microcomputer or the like is used. Particularly in the present
embodiment, the main control unit 14 outputs the control signal 104 for changing the image
according to the state of the reproduction zoom position included in the supplied operation
signal 102, and the left sound control for changing the sound. A signal 106, a right voice control
signal 108 and a far-range voice control signal 110 are output. The signal processing unit 16 has
a function of processing an audio signal, an image signal, and the like as digital signals. In this
embodiment, the image and audio data 112 are read from the information recording medium 18
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and signal processing is performed, and in particular, image processing according to the control
signal 104 is performed on the image data. As a result, the left digital audio signal 116, the right
digital audio signal 118, the far-field digital audio signal 120, and the image signal 114 are
output. In this embodiment, the audio signals 116, 118 and 120 are supplied to the D / A
converter 22, and the image signal 114 is supplied to the image display unit 20. This image
signal 114 has a terminal and is externally provided. It may be output to The information
recording medium 18 has a function of recording an image signal and an audio signal, and a
package containing a rotary recording medium such as a memory card or a magneto-optical disk
on which a semiconductor memory is mounted is used. May be. In this embodiment, a moving
image is recorded, and image data, short distance voice data and far distance voice data are
recorded.
Further, these data may be recorded normally without using a zoom or the like at the time of
moving image recording. The image display unit 20 has a function of displaying an image based
on the input image signal 114. For example, a liquid crystal display (LCD) panel or the like is
used. The left audio signal amplifier 24, the right audio signal amplifier 26, and the far-distance
audio signal amplifier 28 have a function of amplifying or attenuating an analog signal such as
an audio signal, and may be, for example, an analog amplifier such as a microphone amplifier.
Each amplifier 24, 26 and 28 receives the left analog audio signal 122, the right analog audio
signal 124 and the far-distance analog audio signal 126, respectively, and amplifies or attenuates
it with the left gain, the right gain and the far-gain, for example The signal 128 is output as the
right audio signal 130 and the far-field audio signal 132. The left gain, the right gain and the far
distance gain fluctuate in response to the left voice control signal 106, the right voice control
signal 108 and the far voice control signal 110 respectively supplied. The mixing circuit 26 is a
circuit for mixing and synthesizing input audio signals, and, for example, mixes a short distance
audio signal and a long distance audio signal. In this embodiment, the short left audio signal 128
and the right audio signal 130, and the far audio signal 132 are input. These are subjected to
synthesis processing to output a left output audio signal 134 and a right output audio signal 136.
Each of these output audio signals 134 and 136 are supplied to the left loudspeaker 32 and the
right loudspeaker 34 respectively in this embodiment to produce left speech and right speech
but have terminals and are externally output. You may Next, the operation of the video and audio
reproduction apparatus 10 in this embodiment will be described. In the video and audio
reproduction apparatus 10, when the operator operates the reproduction zoom operation device
44 in the operation unit 12 at the time of moving image reproduction, the operation signal 102
instructing the state of reproduction zoom is input to the main control unit 14. At this time, as
shown in FIG. 2 and FIG. 4, when the reproduction zoom position 46 in the reproduction zoom
operation device 44 is on the tele (T) position side from the standard state 48, the operation
signal 102 instructs zoom up reproduction; This is a signal for instructing zoom-down
reproduction when being at the wide (W) position side from the standard state 48. The main
control unit 14 supplies the control signal 104 corresponding to the instruction indicated by the
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operation signal 102 to the signal processing unit 16.
Similarly, the left audio control signal 106, the right audio control signal 108 and the far-field
audio control signal 110 are supplied to the left audio signal amplifier 24, the right audio signal
amplifier 26, and the far-field audio signal amplifier 28, respectively. The control signal 104 is a
signal for controlling the signal processing unit 16 so as to enlarge the image 40 when the
reproduction zoom instruction is zoom-up reproduction and to reduce the image 40 in the zoomdown reproduction. is there. Further, as shown in FIG. 3, the left audio control signal 106 and the
right audio control signal 108 decrease the left volume 52 and the right volume 54 at the time of
zoom-up reproduction, and as shown in FIG. At the time of reproduction, the left volume 52 and
the right volume 54 are increased to adjust the volume balance and control the left audio signal
amplifier 24 and the right audio signal amplifier 26. The far-distance audio control signal 110
increases the far-distance volume 56 at zoom-up reproduction as shown in FIG. 3 and decreases
the far-distance volume 56 at zoom-down reproduction as shown in FIG. To control the fardistance audio signal amplifier 28. These audio control signals 106, 108 and 110 may control
the left gain in the left audio signal amplifier 24, the right gain in the right audio signal amplifier
26, and the far-field gain in the far-field audio signal amplifier 28, respectively. The signal
processor 16 reads the image and sound data 112 from the information recording medium 18
and performs digital signal processing. At this time, the image data is also subjected to image
processing such as enlargement or reduction based on the control signal 104 described above,
and is output to the image display unit 20 as an image signal 114 corresponding to the
reproduction zoom. On the other hand, audio data is supplied to the D / A converter 22 as a left
digital audio signal 116, a right digital audio signal 118 and a far digital audio signal 120, and
the left analog audio signal 122, the right analog audio signal 124 and far It is converted into an
analog audio signal 126. Each analog audio signal 122, 124 and 126 is provided to left audio
signal amplifier 24, right audio signal amplifier 26 and far-field audio signal amplifier 28,
respectively. Here, the left audio signal 128 and the right audio signal 130, and the far-distance
audio signal 132 are relatively amplified according to the reproduction zoom, amplified or
attenuated by the left gain, the right gain, and the far-distance gain, respectively. And are
generated attenuated.
These audio signals 128, 130 and 132 are supplied to the mixing circuit 30 and synthesized. As
a result, the left output audio signal 134 obtained by mixing the left audio signal 128 and the fardistance audio signal 132 and the right output audio signal 136 obtained by mixing the right
audio signal 130 and the far-distance audio signal 132 are output. And the right loudspeaker 34.
At this time, the sound output of the left output audio signal 134 and the right output audio
signal 136 in each of the left loudspeaker 32 and the right loudspeaker 34 and the display of the
image signal 114 output to the image display unit 20 are as follows. The apparatus 10 is
adjusted as a whole so as to have the same timing. As described above, according to the present
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invention, when reproducing a moving image together with audio data in which short-distance
and long-distance voices are separately recorded, according to the present invention, the
reproduction zoom operation is performed. Accordingly, the image and sound signal with a sense
of presence can be reproduced by enlarging or reducing the image and changing the volume
balance of the near and far sounds. By using the present apparatus, it is possible to redo the
operation to perform a zoom operation at the time of reproduction without requiring a user
operation such as a zoom at the time of moving image recording. The present device is applied
particularly effectively to the reproduction of moving pictures with sound in a digital camera, but
can also be applied to a combination of a still picture and the sound associated with it, for
example, for recording of lectures etc. You may use. Further, when using the reproduction zoom,
the output of the image signal and the audio signal can be connected to the input of the
recording device, for example, so that moving images can be cut out and audio after mixing can
be recorded, It can be used to record important points. BRIEF DESCRIPTION OF THE DRAWINGS
FIG. 1 is a block diagram showing an embodiment of an image and sound reproduction apparatus
according to the present invention. FIG. 2 is an explanatory view showing an example of an
image when a reproduction zoom is operated in a tele position direction in the image and sound
reproduction apparatus of the embodiment shown in FIG. 1; 3 shows balance of left and right
volumes at a short distance and volume at a far distance when the playback zoom is operated in
the direction of the tele position in the image / sound playback apparatus of the embodiment
shown in FIG. Is an explanatory view corresponding to FIG. 4 is an explanatory view showing an
example of an image when the reproduction zoom is operated in the direction of the wide
position in the image and sound reproduction apparatus of the embodiment shown in FIG. 1;
5 shows balance of left and right volumes at a short distance and volume at a long distance when
the playback zoom is operated in the direction of the wide position in the image / sound
playback apparatus of the embodiment shown in FIG. Is an explanatory view corresponding to
FIG. [Description of the code] 10 image / sound reproducing device 12 operation unit 14 main
control unit 16 signal processing unit 18 information recording medium 20 image display unit
22 digital / analog converter 24 left audio signal amplifier 26 right audio signal amplifier 28 far
distance audio signal Amplifier 30 Mixing Circuit 32 Left Loudspeaker 34 Right Loudspeaker
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