JP2757415B2 - Disk recording device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a disk recording apparatus for recording, for example, a still image video signal and a time-compressed audio signal on a magnetic disk.

SUMMARY OF THE INVENTION The present invention provides a disk recording apparatus that records a time-compressed audio signal together with a still image video signal on a magnetic disk, and stops the rotation of the disk when using an internal microphone. When an external microphone is used, the sound is input in a state where the playback screen can be projected by rotating the disc when using an external microphone. This prevents dubbing, and allows the user to perform post-recording while watching the playback screen when using an external microphone.

[Conventional technology]

2. Description of the Related Art There is known an electronic still camera in which a camera body and a playback adapter are configured separately. In such an electronic still camera, a magnetic disk is mounted on the camera body side, and a still image video signal captured by an image sensor of the camera body is recorded on the magnetic disk. During playback, the camera body and the playback adapter are connected, and a playback circuit provided on the playback adapter side plays back the still image video signal recorded on the magnetic disk of the camera body.

In such an electronic still camera, an electronic still camera capable of recording not only a still image but also an audio signal relating to a shot still image has been developed.

Recording of an audio signal by an electronic still camera is performed for a predetermined time (5 seconds, 10 seconds, or 20 seconds) as disclosed in, for example, JP-A-62-99972 and JP-A-62-95079. This is done by collecting audio from an audio signal, compressing the audio signal to a time corresponding to one field, and recording it on one track.

[Problems to be solved by the invention]

As described above, in an electronic still camera capable of recording not only a still image but also an audio signal, each time an image is taken by the camera body alone, or while viewing the playback screen after the end of the still image shooting, the shooting is performed. It is possible to post-record an audio signal related to the obtained still image.

As described above, the electronic still camera capable of recording an audio signal is provided with a built-in microphone so that sound can be easily collected. In the case where voice input is performed each time the camera body itself captures an image, the built-in microphone is mainly used.

However, since the built-in microphone is arranged in the same housing as a noise source such as a motor, if sound is collected using the built-in microphone, noise such as a rotating sound of a disk is picked up.

Therefore, it is conceivable to prevent the noise from being mixed when the built-in microphone is used by always stopping the rotation of the disk during sound pickup.

However, in order to display the playback screen, it is necessary to rotate the disc, so if you always stop the rotation of the disc when collecting sound, you can watch the playback screen after finishing the still image shooting The audio signal relating to the still image cannot be dubbed.

SUMMARY OF THE INVENTION It is therefore an object of the present invention to provide a disk recording apparatus which can prevent noise such as rotation of a disk from being picked up at the time of sound pickup, and perform post-recording while watching a reproduction screen.

[Means for solving the problem]

The present invention provides, in a disk recording device that records a time-compressed audio signal on a disk together with a still image video signal, when using an internal microphone, stops rotation of the disk and performs audio input, When an external microphone is used, the disk recording device is configured to rotate the disk to input a sound so that a reproduction screen can be projected.

[Operation] It is detected whether the external microphone 83 is connected to the external microphone jack 4 and the external microphone 83 is detected.
When the disk 83 is connected, sound is collected while the disk is being rotated. When the external microphone 83 is not connected, sound is collected after the rotation of the disk is stopped.

〔Example〕

An embodiment of the present invention will be described in the following order.

a.Explanation of the appearance of the camera body b.Explanation of the appearance of the playback adapter c.Configuration of the camera body d.Configuration of the playback adapter e.Description of the processing in the post-recording mode with the camera body alone f.Simultaneous with the camera body alone Description of processing in recording mode g. Description of post-recording processing when the playback adapter is connected a. Outline of the appearance of the electronic still camera body In the electronic still camera to which the present invention is applied, the still image The associated audio signal can be recorded.

FIG. 1 shows a camera body 1 to which the present invention is applied as a whole. In FIG. 1, the camera body 1
Although not shown, a photographic lens, a strobe light emission window, and the like are provided on the front side surface 1A of the camera.

On the rear side 1B of the camera body 1, there are a viewfinder 2, a built-in microphone 3, and an external microphone jack 4.
Is arranged. A connector 5 for connecting a playback adapter is provided on the rear side surface 1B of the camera body 1.

At approximately the center on the rear side of the camera body 1, a disk insertion slot 6 is provided. A magnetic disk cassette 7 (FIG. 2) is inserted into the disk insertion slot 6. Still images and audio signals related thereto are recorded on the magnetic disk 41 stored in the magnetic disk cassette 7. The magnetic disk cassette 7 is moved by the eject switch 8.
It can be taken out.

A cover 9 that covers the upper surface 1C of the camera body 1 is provided.
A battery storage recess is formed at a position corresponding to the cover 9, and a charging pack or a dry battery is stored in the battery storage recess.

A liquid crystal display 10 is provided near the disc insertion slot 6. Various operation setting states are displayed on the liquid crystal display 10. For example, when dubbing is performed, the remaining seconds of sound pickup are displayed. When the sound collection is interrupted and the sound is deleted, "E" is displayed. Further, a warning is issued on the liquid crystal display 10 indicating that the number of remaining tracks has decreased.

Various switches are provided on the camera body 1. These switches will be described.

Reference numeral 11 denotes a recording / playback mode changeover switch. The switch 11 for the recording / reproducing mode is a slide switch having three positions. By the switch 11 of the recording / playback mode,
Three modes of voice recording, "no sound", "dubbing", and "simultaneous recording" can be set.

When the camera body 1 is used alone, if the recording / playback mode switch 11 is set to the "after-recording" position, the audio signal relating to the still image taken by operating the after-recording switch 12 which will be described later. It is possible to dub. The possible voice input time during the after-recording operation is, for example, 9.6 seconds. Recording / playback mode switch 11
Is set to the `` simultaneous recording '' position, audio input is enabled for 9.6 seconds, for example, from the end of still image shooting, and the audio signal input during this time is related to the captured still image Be recorded. In addition,
In the “no sound” position, only still image shooting is performed.

When the camera body 1 and the playback adapter 21 (FIG. 3) are connected and used, the playback screen is viewed only when the recording / playback mode switch 11 is set to the “after-recording” position or the “simultaneous recording” position. However, the audio signal related to this can be dubbed. When the camera body 1 and the playback adapter 21 are connected and used, the operation when the recording / playback mode switch 11 is set to the “after-recording” position and the operation when the recording / reproduction mode switch is set to the “simultaneous recording” position are as follows. Is the same.

12 is a dubbing switch. This dubbing switch
When an audio input is made to the built-in microphone 3 or the external microphone attached to the external microphone jack 4 by operating the device 12, audio signals can be recorded.
As this dubbing switch 12, to prevent erroneous operation,
The one that is in a post-recording state when the protrusion 12A is pushed and slid is used. Further, since such a switch does not move unless it is pressed, there is no mixing of switch operation sounds.

Reference numeral 13 denotes a push switch that functions as an audio repeat switch during reproduction, and functions as a half release state setting switch during recording. That is,
When the push switch 13 is pressed during playback, the audio signal is played back repeatedly. When the push switch 13 is pressed during recording, power is supplied to the imaging unit and the recording unit, the rotation of the disk is started, and the apparatus is set to the shooting standby state.

14 is a mode switch. This mode switch 14
Is a four-position rotary switch, and four modes of "lock", "single-shot", "continuous-shot", and "high-speed continuous-shot" can be set by the mode switch 14. In the single shooting mode, one image is shot each time a release button 18 described later is pressed. In continuous shooting mode, the release button 18
While pressing, continuous shooting is performed. However, when the recording / reproduction mode changeover switch 11 is set to the “simultaneous recording” position, even if the mode switch 14 is set to the “continuous shooting” position, single shooting is performed.

Reference numeral 15 denotes a self-timer switch. When the release button 18 is pressed while the self-timer switch 15 is pressed, timer shooting is performed.

Reference numeral 16 denotes a buzzer on / off switch. If the buzzer is set to the on state, various warnings and, for example, a sound collection start time and a sound collection end time during dubbing can be known from the buzzer sound.

Reference numeral 17 denotes a blank search mode setting switch. When the mode is set to the blank search mode, a signal photographed next can be recorded on an empty track of the magnetic disk 41.

18 is a release button. Release button 18
It can be pushed down to the steps. When the release button 18 is lightly pressed, power is supplied to the imaging unit and the recording unit, the rotation of the disc is started, and the imaging standby state is set. When the release button 18 is fully pressed, a still image captured by the image sensor at this time is recorded. The release button 18 functions as a frame feed switch during reproduction.

The camera body 1 alone can record a still image and an audio signal related thereto. When performing playback, connect the playback adapter 21 described below to the camera body 1.
Need to be connected to

b. Outline of the appearance of the reproduction adapter FIG. 3 shows the reproduction adapter 21 as a whole. The playback adapter 21 is connected to the camera body 1 and used to play back a still image shot by the camera body 1.

In FIG. 3, on the upper surface 21A of the reproduction adapter 21,
A storage recess 22 for storing the charging pack 23 or the dry battery is formed. A cover 24 is slidably attached to the upper portion of the reproduction adapter 21 so as to cover the storage recess 22.

The connection cable 25 is led out from the side surface 21B of the reproduction adapter 21, and a connector 26 is attached to the end of the connection cable 25. When a still image captured by the camera main body 1 is reproduced using the reproduction adapter 21, the connector 26 is engaged with the connector 5 of the camera main body 1.

An output terminal 27 is provided on a side surface 21C of the reproduction adapter 21. This output terminal 27 is connected to the input terminal of the monitor receiver. Also, on the side 21C of the playback adapter 21, D
A C input terminal 28 is provided. The plug 30 of the AC adapter 29 is connected to the DC input terminal 28.

Reference numeral 31 denotes a playback button for playing back a still image frame by frame. Reference numeral 32 denotes a continuous play button for continuously playing a still image every 5 seconds, for example, 33 denotes a stop button, 34 denotes a reverse button, 35 denotes a forward button, and 36 denotes a still image.
An erase button 37 for erasing frames is an auto erase button for erasing all signals on the magnetic disk. Note that the cover 24 of the playback adapter 21 is normally closed, and the charging pack 23 and the operation button
31-37 are not exposed to the outside.

c. Configuration of Camera Body FIG. 4 shows the configuration of the camera body 1.

In FIG. 4, reference numeral 41 denotes a magnetic disk. The magnetic disk 41 is housed in the magnetic disk cassette 7 as shown in FIG. The magnetic disk 41 is rotated by a spindle motor 42. Spindle motor 42
Is controlled by the spindle servo circuit 43 under the control of the system controller 48.

Numeral 44 denotes a magnetic head, by which recording / reproduction of the magnetic disk 41 is performed. The position of the magnetic head 44 is controlled by a tracking servo circuit 45 under the control of a system controller 48.

A key switch 47 is connected to the system controller 48. The key switch 47 includes various switches on the camera body 1.

The system controller 48 has a liquid crystal display
10 is connected. Various setting states are displayed on the liquid crystal display 10. Buzzer 46 to system controller 48
Is connected. This buzzer 46 is sounded as necessary.

By operating the key switch 47, a still image can be recorded and an audio signal can be recorded.

Switch circuit 61, switch circuit 63, switch circuit 64
Is switched between video signal recording and audio signal recording. When recording a video signal, the switch circuit 61,
The switch circuit 63 and the switch circuit 64 are respectively switched to the a side. When recording audio signals, switch circuit
61, the switch circuit 63, and the switch circuit 64 are each switched to the b side.

The switch circuit 66 is switched between recording and reproduction. At the time of video signal recording or audio signal recording, the switch circuit 66 is switched to the a side.

First, a case where a still image video signal is recorded will be described. At this time, the switch circuit 61 and the switch circuit 63 are respectively switched to the a side, and the switch circuit 66
Is switched to the a side. In FIG. 4, a subject image is formed on an image sensor 49 such as a CCD or a MOS through a lens 50 and an iris ring 51. The output of image sensor 49 is amplifier 5
2. It is supplied to the line sequential processing circuit 54 via the process circuit 53.

The opening and closing of the iris ring 51 is controlled by the output of the iris drive circuit 55. The iris control circuit 55 is controlled based on a command from the system controller 48. Thereby, iris control is performed. Further, the imaging device 49
It is driven by the output of the drive circuit 56. The drive circuit 56 is controlled based on a command from the system controller 48.

The line-sequencing circuit 54 converts the luminance signal Y and the line-sequential color difference signals (RY) and (B) from the component color video signal.
-Y). Imaged by the image sensor 49,
The signal passed through the amplifier 52 and the process circuit 53 is converted into a luminance signal Y and a line-sequential color difference signal (RY) and (BY) by a line-sequencing circuit 54.

The line-sequentialized color difference signals (RY) and (BY) from the line-sequencing circuit 54 are supplied to an FM modulation circuit 58 via a pre-emphasis circuit 57. In the FM modulation circuit 58, the line-sequentialized color difference signals (RY) and (BY) are FM-modulated. The output of the FM modulation circuit 58 is supplied to one input terminal of the addition circuit 59.

The luminance signal Y from the line-sequencing circuit 54 is supplied to the FM modulation circuit 62 via the pre-emphasis circuit 60 and the switch circuit 61. The luminance signal Y is FM-modulated by the FM modulation circuit 62. FM
The output of the modulation circuit 62 is applied to the addition circuit 59 via the switch circuit 63.
Is supplied to the other input terminal.

The addition circuit 59 outputs the FM-modulated line-sequential color difference signals (RY) and (BY) output from the FM modulation circuit 58 and the FM
The FM modulated luminance signal Y output from the modulation circuit 62 is frequency division multiplexed.

The output of the adder circuit 59 is a switch circuit 64, a recording amplifier 65,
It is supplied to the magnetic head 44 via the switch circuit 66. The video signal is recorded on the track of the magnetic disk 41 by the magnetic head 44.

69 is a strobe discharge tube. In the strobe discharge tube 69,
The discharge circuit 70 is connected. When performing photographing using a strobe, the strobe discharge tube 69 is used. Control of the strobe discharge tube 69 is performed based on a control signal from the system controller 48.

Reference numeral 71 denotes a photometric detection diode. The current flowing through the diode 71 is detected by the detection circuit 72, and the detection output is supplied to the system controller 48.

Next, a case where an audio signal is recorded will be described.

When recording audio signals, switch circuit 6
1. The switch circuit 63 and the switch circuit 64 are switched to the b side.

Audio input can be performed by the built-in microphone 3 and also by the external microphone 83 connected to the external microphone jack 4. When the built-in microphone 3 is used, the switch 81 is switched to a side. When the external microphone 83 is used, the switch 81 is switched to the b side. The switching state of the switch 81 is detected by the switch detecting means 82, and this detection signal is supplied to the system controller 48.

An audio signal from an external microphone 83 connected to the built-in microphone 3 or the external microphone jack 4 is supplied to an amplifier 84 via a switch 81. Amplifier
The output of 84 is band-limited through a high-pass filter 85 and a low-pass filter 86 and is passed through a compressor 87 for noise removal. Then, the data is digitized by the A / D converter 88.

The A / D converter 88 has a write clock generation circuit 89
Supplies a sampling clock having a frequency fs. Further, a clock from the write clock generation circuit 89 is supplied to the address counter 91.

The address counter 91 is controlled by the output of the system controller 48. At the time of writing, the address from the address counter 91 is advanced by the clock of the frequency fs from the write clock generation circuit 89.

The audio signal digitized by the A / D converter 88 is written to the RAM 90 according to the write address from the address counter 91.

At the time of reading, the address from the address counter 91 is the frequency 64 output from the read clock generation circuit 92.
It is advanced by the clock of 0fs. The audio signal stored in the RAM 90 is read according to the read address output from the address counter 91.

The output of the RAM 90 is returned to an analog signal by the D / A converter 93. The D / A converter 93 is supplied with a clock having a frequency of 64 fs from the read clock generation circuit 92.

As described above, the input audio signal is digitized by the sampling clock of the frequency fs and written into the RAM 90, and the digital audio signal stored in the RAM 90 is read by the clock of the frequency 640fs. As a result, the audio signal is temporally compressed to 1/640.

The output of the D / A converter 93 is supplied to the adding circuit 94.
The addition circuit 94 includes a flag and a control code generation circuit.
From 95, a flag indicating the connection information and a control code are generated at a predetermined timing. The flag and the control code are added to a predetermined position of the audio signal compressed on the time axis.

The output of the addition circuit 94 is supplied to the FM modulation circuit 62 via the pre-emphasis circuit 96 and the switch circuit 61. The output of the FM modulation circuit 62 is supplied to the magnetic head 44 via the switch circuit 63, the switch circuit 64, the recording amplifier 65, and the switch circuit 66. The audio signal compressed on the time axis is recorded on the magnetic disk 41 by the magnetic head 44.

The system controller 48 of the camera body 1 and the system controller 101 (FIG. 5) of the playback adapter 21 are bidirectionally connected via an interface 97 and an interface 102. The output terminal 68 is a playback adapter.
It is connected to 21 input terminals 111.

Next, the reproduction time will be described. At the time of reproduction, the switch circuit 66 is switched to the b side. And the magnetic head 44
Is output from the output terminal 68 via the switch circuit 66 and the amplifier 67.

Further, the output of the amplifier 67 is supplied to the signal detection circuit 98. Although the playback operation cannot be performed by the camera body 1 alone,
Whether or not a signal is recorded on the track of the magnetic disk 41 can be detected from the output of the signal detection circuit 98. The detection signal of the signal detection circuit 98 is supplied to the system controller 48.

d. Configuration of playback adapter FIG. 5 shows the configuration of the playback adapter 21.
In FIG. 5, the input terminal 111 is connected to the output terminal 68 of the camera body 1. Also, the system controller 101
Is bidirectionally connected to the system controller 48 of the camera body 1 via the interface 102 and the interface 97. In addition, a key switch 103 including various operation switches provided on the reproduction adapter 21 is connected to the system controller 101.

The output from the output terminal 68 of the camera body 1 is input from the input terminal 111 of the playback adapter 21.

The switch circuit 113 includes a switch circuit 120, a switch circuit
122 is switched between video signal reproduction and audio signal reproduction. During video signal playback, the switch circuit
113, the switch circuit 120, and the switch circuit 122
Side. At the time of audio signal reproduction, the switch circuit 113, the switch circuit 120, and the switch circuit 122 are each switched to the b side.

First, a description will be given from the time of video signal reproduction. At the time of reproducing the video signal, the switch circuit 113, the switch circuit 120, and the switch circuit 122 are switched to the a side. A video signal reproduced from the magnetic disk 41 of the camera body 1 is supplied to the input terminal 111. This video signal is a signal obtained by frequency division multiplexing the FM modulated luminance signal Y and the FM modulated line sequential color difference signals (RY) and (BY).

A video signal from an input terminal 111 is supplied to a band-pass filter 114 and a band-pass filter 119 via an amplifier 112 and a switch circuit 113.

The band-pass filter 114 extracts the FM-modulated line-sequential color difference signals (RY) and (BY).
The output of the band pass filter 114 is supplied to the FM demodulation circuit 116. In the FM demodulation circuit 116, the line-sequentialized color difference signal (R-
Y) and (BY) are demodulated. The output of the FM demodulation circuit 116 is supplied to a video signal processing circuit 118 via a de-emphasis circuit 117.

The band-pass filter 119 extracts the FM-modulated luminance signal Y. The output of the band pass filter 119 is supplied to the FM demodulation circuit 121 via the switch circuit 120.
In the FM demodulation circuit 121, the luminance signal Y is demodulated. The output of FM demodulation circuit 121 is switch circuit 122, de-emphasis circuit
The signal is supplied to the video signal processing circuit 118 via 123.

The video signal processing circuit 118 outputs a line-sequential color difference signal (R-
Y) and (BY) are synchronized, and the component signal Y
And (RY) and (BY).

The output of the video signal processing circuit 118 is supplied to the NTSC encoder 124. The NTSC encoder 124 forms an NTSC composite color video signal from the component signals Y and (RY) and (BY). The NTSC composite color video signal is output from the output terminal 125.

Next, a description will be given of a case where an audio signal is reproduced. During reproduction of the audio signal, the switch circuit 113, the switch circuit 120, and the switch circuit 122 are each switched to the b side.

The input terminal 111 is supplied with a reproduction audio signal that has been time-axis-compressed and FM-modulated. This reproduced audio signal is supplied to the FM demodulation circuit 121 via the amplifier 112, the switch circuit 113, and the switch circuit 120. In the FM demodulation circuit 121, the audio signal from the input terminal 111 is FM-demodulated.

The output of the FM demodulation circuit 121 is supplied to the de-emphasis circuit 131 via the switch circuit 122. The output of the de-emphasis circuit 131 is supplied to an A / D converter 134 via a low-pass filter 132, and a flag and a control code are stored in a flag / control code detection circuit 133.
Is detected by This detection output is
Supplied to 1.

The A / D converter 134 has a write clock generation circuit 13
A clock having a frequency of 640 fs is supplied from 5. The A / D converter 134 converts the time-base compressed audio signal to frequency 6
It is sampled with a clock of 40fs.

Also, the frequency 640 from the write clock generation circuit 135
The clock of fs is supplied to the address counter 137. At the time of writing, the address output from the address counter 137 is advanced by the clock having the frequency of 640 fs. This write address is supplied to the RAM 136.

The output of the A / D converter 134 is supplied to the RAM 136, and the RAM 136
The audio signal from the A / D converter 134 is written to the.

At the time of reading, the clock of the frequency fs from the read clock generation circuit 138 is supplied to the address counter 137, and the address output from the address counter 137 is advanced by the clock of the frequency fs. Based on the address from the address counter 137, the audio signal stored in the RAM 136 is read.

The output of the RAM 136 is supplied to the D / A converter 139. D / A
Converter 139 is supplied with a clock of frequency fs from read clock generation circuit 138. RAM136 output is D / A
The converter 139 returns the signal to an analog signal.

Thus, the time axis is restored by writing the reproduced audio signal, which has been time-axis-compressed to 1/640, to the RAM 136 with a clock of frequency 640 fs and reading it out with the clock of frequency fs.

The output of the D / A converter 139 is extracted from the output terminal 142 via the low-pass filter 140 and the expander 141.

When an audio signal is reproduced using the reproduction adapter 21, information on which track is recorded with which signal is required. Index table 143
, Information such as what signal is recorded on which track is recorded. In addition, a flag / control code detection circuit 133 and a vertical synchronization detection circuit 144 are provided to create such an index table.

e. Description of the process in post-recording mode using the camera body alone FIG. 6 shows the process when the recording / reproducing mode switch 11 of the camera body 1 is set to “post-recording” and the camera body 1 itself performs post-recording processing. This will be described with reference to the flowchart of FIG.

When the single mode is set by the mode switch 14, each time the release button 18 is pressed, a still image is shot one by one. The video signal of the still image is recorded on an annular track of the magnetic disk 41.
When the recording / reproducing mode changeover switch 11 is set to “after-recording”, an empty track for audio is prepared on the outer peripheral side of the recording track of the video signal. When the history of the recording state of the magnetic disk 41 is remembered, the audio signal related to the photographed still image can be dubbed on this audio empty track. The sound pickup time during dubbing is 9.6 seconds.

When the continuous shooting mode is set, a still image is continuously shot while the release button 18 is kept pressed. The video signal of the still image is recorded on an annular track of the magnetic disk 41. When the recording / playback mode switch 11 is set to
At this time, one track on the outer periphery of the video track recorded first during continuous shooting is prepared as an empty track for audio. An audio signal related to a still image that was first shot at the time of continuous shooting can be dubbed on this audio free track. The sound pickup time during dubbing is 9.
6 seconds.

That is, in FIG. 6, it is determined in step 151 whether or not the release button 18 has been pressed. If the release button 18 has been pressed, it is determined whether the mode is the single shooting mode (step 152). In the single shooting mode, one track is left on the outer peripheral side, and the video signal is captured and the magnetic disk 41
(Step 153).

When the release button 18 is pressed, in the continuous shooting mode, first, one track on the outer periphery is opened (step 15).
4) The video signal is recorded on the next track (step 15).
5) Then, it is determined whether or not the release button 18 has been pressed (step 156). If the release button 18 is still pressed, the process returns to step 155, and the video signal of the next still picture is continuously recorded on the next track.

Thereby, as shown in FIG. 7A, in the single shooting mode, the recording tracks V ₁₁ , V ₁₂ ,
... outer peripheral blank track A ₁₁ for audio side, A ₁₂ of, ...
Are respectively provided. In the case of continuous shooting mode,
As shown in FIG. 7 B, provided free track A ₂₁ for audio on the outer peripheral side, on its inner periphery, a recording track V ₂₁ of continuous shooting was still picture video signal, V _22, V ₂₃ ... are provided .

In FIG. 6, it is determined whether or not the post-recording switch 12 has been pressed (step 157).
When is pressed, a buzzer sounds for 0.4 seconds to notify the start of sound collection (step 158). Wait 0.4 seconds are separated by pressing the after-recording switch 12 (step 159), the sound collecting time T _n is initialized to 0 (step 160). Then, sound pickup is started 0.4 seconds after the after-recording switch 12 is pressed and released (step 161).

It is determined whether or not the post-recording switch 12 is pressed during sound pickup (step 162).
If has not been pressed, it is determined whether or not the release button 18 has been half-pressed during sound collection (step 163). If during the sound collecting the release button 18 has not been pressed halfway, whether voice collecting time T _n has elapsed 9.6 seconds is determined (Step 164).

When the sound collection time T _n has elapsed 9.6 seconds, the buzzer is sounded (step 165), is picked-up sound time is informed that ended. Then, it is determined whether the mode is the single shooting mode or the continuous shooting mode (step 166). In single shooting mode, an empty track provided around the recording track of the still image video signal
The collected audio signal is recorded (step 16).
7). In the continuous shooting mode, the picked-up audio signal is recorded on an empty track provided around the recording track of the first still picture video signal in the continuous shooting (step
168).

Sound pickup may fail during sound pickup. In this case, the post-recording switch 12 is pressed during sound pickup, or the release button 18 is half-pressed during sound pickup.

In step 162, it is determined whether or not the post-recording switch 12 has been pressed during sound collection. In step 163, it is determined whether the release button 18 has been half-pressed.
If the post-recording switch 12 is pressed during sound pickup or the release button 18 is half-pressed during sound pickup, it is determined whether the mode is the single shooting mode or the continuous shooting mode (step 169).

In the single shooting mode, the signal on the outer track of the recording track of the still image video signal is deleted (step 17).
0).

In the continuous shooting mode, the signal on the outer track of the recording track of the first still image video signal during the continuous shooting is deleted (step 171).

During sound pickup, a photo opportunity may come. In this case, the release button 18 is fully pressed. When the release button 18 is fully pressed, still image shooting has priority over sound pickup. Thus, shooting can be performed without missing a photo opportunity.

That is, in step 172, it is determined whether or not the release button 18 has been fully pressed.

If the release button 18 has been fully pressed, one track on the outer periphery is opened for audio, and a still or video signal is recorded (step 173).

f. Description of Processing in Simultaneous Recording Mode with Single Camera Body FIG. 8 shows processing when the camera body 1 is set to the “simultaneous recording” mode by itself. The “simultaneous recording” mode is set by the recording / reproducing mode switch 11. In the "simultaneous recording" mode, each time the release switch 18 is pressed and a still image is taken one by one, a video signal of the still image is recorded on an annular track of the magnetic disk. At this time, an empty track is provided on the outer peripheral side of the recording track of the video signal. At the same time, when a still image is shot, the audio signal is set to be inputtable. Then, the input audio signal is recorded in association with the captured still image. The sound collection time when an audio signal is input is 9.6 seconds.

That is, in FIG. 8, it is determined whether or not the release button 18 has been pressed (step 201). When the release button 18 is pressed, one track on the outer periphery is opened for audio and a video signal is recorded (step 202).

Then, the buzzer sounds for 0.4 seconds (step 203),
The rotation of the disk is stopped (step 204). Wait 0.4 seconds (step 205), the sound collecting time T _n is set to 0 (step 206).

The reason why the sound pickup is started after waiting for .4 seconds is to enable sound pickup after the rotation of the disk is completely stopped. At the time of sound pickup, if the disc is rotating,
Noise generated by the rotation of the disk may be mixed.

When the sound collection time T _n is set to 0, the sound pickup is performed (step 207).

It is determined whether the post-recording switch 12 has been pressed during sound pickup (step 208). Dubbing switch 1 during sound pickup
If 2 has not been pressed, it is determined whether the release button 18 has been half-pressed (step 209).

If not post-recording switch 12 and the release button 18 is pressed in the voice collecting, whether voice collecting time T _n has reached 0.6 seconds is determined (Step 210).

When the sound collection time T _n reaches 9.6 seconds, 0.4 seconds buzzer sounded (step 211), the disk is rotated (step 212). Then, the input audio signal is recorded on an empty track around the recording track of the still image video signal (step 213).

Recording may fail during sound pickup. In this case, the post-recording switch 12 is pressed during sound pickup, or the release button 18 is half-pressed during sound pickup.

In step 208, it is determined whether or not the post-recording switch 12 has been pressed during sound collection. In step 209, it is determined whether or not the release button 18 has been half-pressed.
If the post-recording switch 12 is pressed during sound pickup or the release button 18 is half-pressed during sound pickup, the signal on the outer track of the recording track of the still picture video signal is erased (step 214). ).

A shutter chance may come during sound pickup.
In this case, the release button 18 is fully pressed. When the release button 18 is fully pressed, still image shooting has priority over sound pickup. That is, if the release button 18 is fully depressed in step 215, one track on the outer periphery is opened for audio and a still picture video signal is recorded (step 216).

g. Description of post-recording processing when playback adapter is connected FIG. 9 shows processing when the camera body 1 and the reproduction adapter 21 are connected to perform a post-recording operation.
When the camera body 1 and the playback adapter 21 are connected and the audio dubbing switch 12 is pressed, audio dubbing can be performed.

When the camera body 1 and the playback adapter 21 are connected, the playback mode changeover switch 11 is set to "after-recording" or "simultaneous recording". it can. When an external microphone 83 is connected to the external microphone jack 4 and sound is collected using the external microphone 83, sound can be collected while the screen is reproduced. When sound is collected using the built-in microphone 3, the rotation of the disc is stopped at the time of sound collection, and the reproduction screen is muted. This is to prevent the rotation sound of the disk from being mixed as noise when the built-in microphone 3 is used.

In FIG. 9, it is determined whether the after-recording switch 12 has been pressed (step 301). And at this time,
It is determined whether the recording / reproduction mode switch 11 is set to "after-recording" or "simultaneous recording" (step 30).
2) It is determined whether playback is in progress (step 303), and it is determined whether manual frame advance is performed (step 304).

When the recording / playback mode switch 11 is set to "dubbing" or "simultaneous recording", and during playback and manual frame advance, the
A buzzer sounds for a second (step 305), and it is notified that sound collection is started.

At this time, if there is a reproduced sound (step 306), it is immediately muted (step 307). Then, it is determined whether or not the external microphone 83 is connected to the external microphone jack 4 (step 308).

If an external microphone 83 is connected to the external microphone jack 4, sound is collected by the external microphone 83.

That is, when the external microphone 83 is connected to the external microphone jack 4 waits 0.4 seconds (step 309), the sound collecting time T _n is set to 0 (Step 3
Ten). Then, sound is collected by the external microphone 83 connected to the external microphone jack 4 (step 311).

It is determined whether the audio dubbing switch 12 is pressed during sound pickup (step 312).
If no is pressed, whether the sound collecting time T _n has elapsed 9.6 seconds is determined (Step 313).

When the sound collection time T _n has elapsed 9.6 seconds, 0.4 seconds buzzer sounded (step 314), the image is muted (step 3
15).

Then, it is determined whether there is an audio track corresponding to the video (step 316). If there is an audio track corresponding to the video, the collected audio signal is recorded on the track corresponding to the video (step 316).
317). After the audio signal is recorded, the still picture is reproduced by returning to the original video (step 318).

If there is no audio track corresponding to the video, it is determined whether there is an empty track around the recording track of the video signal (step 319). If there is an empty track on the outer circumference of the video track, the collected audio signal is recorded on the empty track on the outer circumference of the video track (step 320). Once the audio signal has been recorded,
Go to step 318 to return to the original video and play the still image.

If it is determined in step 319 that there is no free track on the outer circumference of the video track, the collected audio signal is recorded on the free track on the inner circumference of the video track (step 321). Once the audio signal has been recorded, step 3
Go to 18, return to the original video and play the still image.

As described above, when it is determined in step 308 that the external microphone 83 is connected, sound is collected without stopping the rotation of the disk. Therefore, it is possible to collect sound while watching the playback screen.

When it is determined in step 308 that the external microphone 83 is not connected, the image is immediately muted (step 322), and the rotation of the disk is stopped (step 323).

Then, wait 0.4 seconds (step 324) and start collecting sound
T _n is initialized (step 325). This 0.4 second corresponds to the time until the rotation of the disk completely stops.

Sound collection time T _n from being initialized, sound collection is started (step 326).

It is determined whether the post-recording switch 12 is pressed during sound pickup (step 327).
If no is pressed, whether the sound collecting time T _n has elapsed 9.6 seconds is determined (Step 328).

When the sound collection time T _n has elapsed 9.6 seconds, 0.4 seconds buzzer sounded (step 329), rotation of the disk is started (step 330), go to step 316.

As described above, when it is determined in step 308 that the external microphone 83 is not connected, and sound is collected by the built-in microphone 3, the rotation of the disc is stopped in step 323 before sound collection, and after sound collection is completed. In step 330, the rotation of the disk is started, and the rotation of the disk is stopped during sound collection. Thus, it is possible to prevent noise due to the rotating sound of the disk during sound pickup.

Recording sometimes fails during sound pickup. In this case, the audio dubbing switch 12 is pressed during sound pickup. If it is determined in step 312 or 327 that the post-recording switch 12 has been pressed during sound collection, it is determined whether or not there is an audio track corresponding to the video (step 331). If there is an audio track corresponding to the video, the audio signal recorded on this audio track is deleted (step 332).

〔The invention's effect〕

According to the present invention, whether or not the external microphone 83 is connected to the external microphone jack 4 is detected. When the external microphone 83 is connected, sound is collected while the disk is being rotated, and the external microphone 83 is connected.
When 83 is not connected, sound is collected after the rotation of the disk is stopped. Thus, when sound is collected using the built-in microphone 3, it is possible to prevent noise caused by rotation of the disc from being mixed during sound collection, and when sound is collected using the external microphone 83, the sound is read while watching the playback screen. Sound can be collected.

[Brief description of the drawings]

FIG. 1 is a perspective view of an example of a camera body to which the present invention is applied, FIG. 2 is a perspective view of an example of a magnetic disk cassette according to an embodiment of the present invention, FIG. FIG. 4 is a block diagram showing a configuration of an example of a camera body to which the present invention is applied, FIG. 5 is a block diagram showing a configuration of a playback adapter, and FIG. 6 is a schematic line used for describing one embodiment of the present invention. FIGS. 7 and 8 are schematic diagrams used to explain an embodiment of the present invention, and FIGS. 8 and 9 are flowcharts used to explain an embodiment of the present invention. Description of main reference numerals in the drawings 1: camera body, 3: built-in microphone, 4: external microphone jack, 21: reproduction adapter, 41: magnetic disk, 44: magnetic head, 48: system controller, 49: imaging device.

Claims (1)

(57) [Claims] In a disk recording apparatus for recording a time-compressed audio signal together with a still image video signal on a disk, when an internal microphone is used, the rotation of the disk is stopped and audio input is performed. And a disk recording device that, when an external microphone is used, rotates the disk to input a sound so that a reproduction screen can be projected.