JPS62180686A - Sound recording system for still picture disk - Google Patents

Abstract

PURPOSE:To quite easily perform an after-recording operation by operating a device so that a still picture is outputted on a monitor television, etc., after switching a mode to a reproduction mode when a sound signal is added on a specified still picture, and the sound information is inputted. CONSTITUTION:When a start button for a sound recording is depressed in a reproduction mode, first of all, it is decided whether the mode is a still mode or not, and when the still mode is set, a sound track to be recorded is decided. And similarly as in a normal recording mode, after a sound compression ratio is read, and a time Tc possible to collect the sound in one track, a head is moved to a sound track to be recorded when a sound collection time is extended, and next, a sound track number to be recorded, a control code, and a video track number are inputted to a head data, then a sound recording being started. When the recording of the sound track is completed, the head is returned to the video track of the still picture, and the reproduction of the still picture is performed, and a process is returned to a flow to record the sound information on the next sound track if the remaining sound information is present, while the reproduction of the still picture is performed.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention provides an image recording and reproducing device capable of recording and reproducing still images, audio signals, etc. on a rotating recording medium such as a #z floppy disk. In particular, the present invention provides an audio recording method for adding audio to still images.

[Summary of the invention]

The audio recording method for the still image disc of this invention is as follows:
When adding an audio signal to a still image recorded on concentric tracks of a rotating recording medium, the audio signal to be recorded is input while the still image is being played back, and the audio signal is added to the recorded RVf audio signal. A control signal, a video track number being reproduced, a subsequent audio track number, etc. are added. Therefore, the after-recording operation becomes extremely easy.

[Conventional technology]

Techniques have been developed for recording dozens of still images on small-diameter rotating recording media, such as compact disks and floppy disks.

Such a recording/reproducing method records video signals for one screen on concentric recording tracks, such as those found in recording media of electronic cameras, and allows any still image to be reproduced by searching for the track number. being done.

In this case, when adding the r11 signal to the still image, as shown in FIG.
, v2. The audio signal A1.v3... is on a different track. A7. It is conceivable to record A3...

Then, the audio signal recorded on this audio track is played back and stored in a memory or the like, and then the still image played back from the video track is output and the audio signal is read out from the memory at the same time. You can add an audio signal to the video and watch it on a TV monitor.

[Problem that the invention seeks to solve]

However, in this method, no information about the audio track is recorded on the video track, so for example, when adding an audio signal later to a still image that has already been recorded (dub-recording), A directory for the track is installed in the device, and it is necessary to externally specify the video tracker and second pick-up of the screen for dubbing, which makes the circuit configuration complicated and at the same time causes problems such as poor operability of the device. be.

The present invention has been made in view of these problems, and provides an audio recording method for still image discs that allows for easy recording of audio signals for still images later.

[Means for solving problems]

In the audio recording method of the present invention, when adding an audio signal to a specific still image, the user first sets the playback mode, outputs the still image to a monitor TV, etc., and inputs audio information. Ru.

[Effect]

If you set the audio recording mode while still images are being played,
A track (usually an empty channel) on which audio is to be recorded is determined within the device, and the input audio signal is compressed on the time axis and read into a memory or the like. When it is determined that the audio input has exceeded the storage time of one track, the recording head starts recording to the specified audio track, but at this time, the video track number currently being played, and It is programmed to record the next audio track number, control code, etc., and then record the time-axis compressed audio signal. Therefore, the still image to which the audio has been added can be specified using this audio track, and after-recording operations can also be performed on-the-fly.

〔Example〕

First, an outline of the image recording and reproducing apparatus of the present invention will be explained with reference to FIG.

In this figure, IO indicates the operation panel surface, 11 is the loading opening for the floppy disk, and 12 is the button for selecting the audio compression ratio, which allows you to select, for example, the recording sound overlap time for 1 track. It is something. 13 indicates buttons to be operated during audio recording, such as start,
It consists of a pause and exit button. 14 is an indicator for indicating the audio recording (playback) level, and 15 is a disc eject button.

Reference numeral 16 indicates an operation button for selecting the playback mode or recording mode of the apparatus, and reference numeral 17 indicates a video signal recording button, which can be selected to enable recording in frame units FLM and field units FLD.

Step 8 indicates the erase button, which can be used to erase the entire recorded surface of the disc (ALLER) or erase only one screen (during playback) (E).
RASE) can be selected.

19 is an operation button for rewriting (rewriting), 20 is an operation button used when dubbing the playback screen with an external recording/playback device, 21A and 21B are operation buttons for moving still images frame by frame, and 22 is a still playback button. Buttons 23 and 24 are high-speed search buttons that continuously search for still images, respectively.

FIG. 2 shows an outline of a block diagram of such a recording/reproducing device, in which 30 is a central processing circuit (CPU) that controls the operation of the device, 31 is an input operation button device, and 3
2.33 indicates a floppy disk and a spindle motor rotating the floppy disk; 34, a spindle servo circuit; and 35, a recording/playback head; It is controlled by a head access driver 36 for traversing.

The part 40 surrounded by a dashed line indicates the recording signal input circuit, 41 is a decoder that separates the composite video signal from Y/C and performs signal processing, and 42 is a modulator, which outputs FM modulated video. The signal is sent to the next recording amplifier 43
is input.

This modulator 42 receives an audio signal output from a microphone amplifier 44 or an NR circuit 45 connected to an audio input line terminal, and inputs the audio signal to an A/D converter, memory (RAM), D
The control signal and track number data etc. output from the CPU 30 are compressed on the time axis in a digital processing circuit 46 consisting of a /A converter and supplied via a pre-emphasis 47.
8 and a pulse modulator 49.

A portion 50 of the dashed-dotted line indicates an output signal circuit, in which the reproduced RF multiplied signal is converted into a composite video signal via a reproducing amplifier 51, a demodulator 52, and an encoder 53.

Furthermore, the control signal and track number data contained therein are extracted from the reproduced audio signal, and then sent to the C through the control signal forming circuit 54 and the RF detection circuit 55.
It is taken into PU30.

Further, the demodulated audio signal is converted to a normal audio pitch by a digital processing circuit 58 that extends the time axis via a de-emphasis 57 and outputted via an NR circuit 59.

Note that 60 sets the compression/compression ratio (expansion ratio) of the memory (RAM) of the digital processing circuits 46 and 58;
This figure shows a memory control circuit that controls write and read timing. ,.

The device to which the present invention is applied is a still image recording and reproducing device as described above, and the operation buttons shown in Fig. 1:
One still picture can be recorded or played back on one track of a disc, and at the same time, the audio signal corresponding to the still picture can also be recorded on another recording track by time axis compression.

In this case, the start part of the audio signal includes a track pick-up in which a still image corresponding to the audio signal is recorded, as shown in the flowchart described later, and a control signal (: the relevant track number, □ compression ratio, and other control signals).
, sequential numerals, etc. are added as head data.

When a disk is loaded into the apparatus, this head data is first taken into the index table of the CPU 30, and the playback, recording, and other modes are controlled by the operation buttons.

The main operation examples will be briefly explained below.

In the case of normal playback, playback is started from the beginning of a sequence consisting of a still image and an audio signal specifying the recording track number of the still image.

That is, the head data is read from the audio track corresponding to the still image, and then the time-axis compressed audio signal is taken into the memory of the digital processing circuit of the reproduction circuit. Then, based on the head data, the still image is reproduced, and the time-axis expanded audio signal is read out from the memory.

When the reading from this memory is completed, the head moves to the audio track corresponding to the still image of Bb2, and the still image of Nb2 and the audio signal are similarly reproduced. but,
When the frame advance buttons 21A and 21B are operated, the program shifts to the next program and returns to normal playback with the track to which it has been shifted.

When the still button is pressed, the frame-by-frame mode is entered, and only still images are played back according to the sequence recorded on the audio track.

Also, by pressing the audio play button in still mode, audio corresponding to the still image can be output.

When in recording mode, the input video signal is output through the monitor. When the user presses the video record button in this state, the video signal for one frame is recorded on an empty track on the disc.

When both record and playback are pressed, a video signal is recorded on the disc by video recording, and then the state can be returned to the state where the recorded video is played back.

The audio recording method of the present invention is particularly distinctive when recording audio in playback mode and recording mode.

As shown in the flowchart in Figure 3, when the audio recording start button is pressed while in recording mode,
First, the audio recording track is specified by the CPU 30 (101,), and then the audio compression ratio is read and the audio recording track is read.
A time Tc during which sound can be collected is determined, and sound collection of the audio input signal is started. (102) When the audio recording signal becomes longer than the sound collection time Tc, the head is sent to the specified recording track (104) and the audio signal compressed on the time axis is recorded. A control code, the video track number immediately before recording, the number of the next audio recording track, and the like are added to the second data.

(105) When the recording of this audio recording track is completed, the audio signal in the memory, which has been time-axis compressed, is recorded again on the next designated audio track, but at this time as well, the control code and the immediately before recording head data are recorded. The video track number, the next audio recording track number, etc. are added.
(102 to 105) However, when the recording interruption (pause) button is pressed, a transition is made to a pause routine (not shown), and the sound collection operation (time axis compression) is stopped.

Also, when the recording end button (END) is pressed, it becomes an end button, head forwarding (301), audio recording (3
02), end information is input to the head data in addition to the aforementioned various control data, and the process moves to still image reproduction (303) (304).

Incidentally, in the case of the audio recording method of the present invention, an after-recording mode is added in order to record audio corresponding to the still image when the still mode is set.

As shown in the flowchart in Figure S3, when the start button for audio recording is pressed in playback mode, first it is determined whether or not the mode is still mode (201), and if it is in still mode, the audio track to be recorded is determined. Do (20
2) Then, as in the normal recording mode, after reading the audio compression ratio and determining Tc, (203), determine whether the sound collection time is larger or smaller than T (204).
When the sound collection time becomes longer, the head is moved to the audio track to be recorded (205), and then the audio track number, control code, and video track number to be recorded are entered into the head data (208), and then Audio recording begins, but the video track number at this time is different from normal audio recording in that the video track number is the video track number of the still image being played back in still mode.

In this way, when the recording of the audio track is finished, the head is returned to the video track of the still image (20?). ), and if there is remaining blind spot information while playing back the still image, the process returns to the flow (203) and (204) for recording it on the next audio track.

Then, when the sound collection time exceeds Tc, the same operation is performed again to record the time-base compressed audio signal from the memory onto the next audio track.

Pause and end of recording are the same as normal audio recording described above, but in the case of dubbing mode, still images are being played while being recorded, and the recording data of the recorded audio track is being played back. The difference is that the track number of the still image is input.

Note that details of audio recording in the rewrite mode (rewrite) mode are omitted, but in this case, a table of audio tracks to be rewritten is created, and audio is erased and recorded based on this table.

Furthermore, by adding a digital signal processing circuit 46 for audio recording, it is possible to record audio in real time while continuously reproducing still images.

〔Effect of the invention〕

As explained above, in the audio recording method of the rotating recording medium of the present invention, especially in a mode in which an audio signal is added to a still image later (dubbing), the still image is first played back and then displayed on a monitor TV or the like. Since audio information can be added to a still image by projecting the image and inputting a desired audio signal, there is an effect that an after-recording operation can be performed extremely easily.

Also, when performing after-recording on multiple still images continuously, by simply switching the still images and storing the audio signal in another storage means at that timing, the correspondence between audio and video can be improved. It has the advantage that it can be carried out in real time.

[Brief explanation of drawings]

FIG. 1 is a front view showing an example of the operation surface of a still image recording and reproducing device to which the present invention is applied, FIG. 2 is a block diagram of a device that can be employed in the audio recording method of the present invention, and FIG. 3 is an audio recording mode. Flowchart showing the operation of the device in 4th
The figure shows a video track VD and an audio track A recorded on a disc. FIG. In the figure, 30 is a CPU, 31 is an input operation button device, 32
35 is a recording/playback head, and 46 is a digital processing circuit for compressing the time axis of the audio signal.

Claims (1)

[Claims] In an image recording and reproducing device that is equipped with a function of accessing a recording track of a rotating recording medium and is capable of reading information on a specified annular recording track and reproducing still images, the recording and reproducing device performs still image reproducing. mode, when the mode is set to record an audio signal, at least the audio signal to be recorded is compressed on the time axis and the control code, the video track number being played,
and an audio track number to be reproduced next is added and recorded on a designated track of the rotary recording medium.