JPS6334701A - Recorder - Google Patents

Abstract

PURPOSE:To easily execute post recording of audio signals by previously skipping a track for audio signals at the time of recording to record video signals. CONSTITUTION:A switch 75 is a skip recording mode switch for previously determining audio tracks and and their track positions are skipped to record video signal. In case of a skip recording mode and a field recording mode, video signal are successively recorded every other track Vi shown by solid lines so as skip audio tracks Au shown by broken lines on a magnetic sheet of a floppy 51. Since the the positions of the audio tracks Au are previously fixed and the tracks Au are left as unrecorded parts, the post recording of the audio signals can be easily executed.

Description

[Detailed description of the invention] The invention will be explained in the following order.

A. Field of industrial application B. Overview of the invention C. Prior art D. Problem to be solved by the invention E. Means for solving the problem F. Effect G. Embodiment G1 Description of recording device (Fig. 1) G2 Normal recording Explanation of the mode (FIGS. 2 and 3) Explanation of the G3 skip recording mode (FIGS. 4 to 6) H Effect of the invention A Industrial field of application The present invention relates to a recording device such as an electronic still camera. .

B. Summary of the Invention This invention magnetically records a video signal and, for example, an audio signal corresponding to the video signal, on a medium using concentric tracks, and the track for the audio signal is opened at the recording time. This device is designed to record video signals, and since the track position for the audio signal on the recording medium is known, the audio (i.e.
After-recording of issues can be done easily.

C. Conventional Technology In an electronic still camera, one field of video signal is recorded as one annular magnetic track on a "ζ video floppy. In this case, there are two video signal recording modes: "field recording" and "ζ. "Frame recording"
During field recording, one field of video signal is recorded on one magnetic track for each recording, and during frame recording, one frame of video signal is recorded on two adjacent magnetic tracks for one recording. Each field is recorded. The total number of tracks on one video floppy is 50.

In such cameras, it has been considered to record audio signals on a track separate from video signals.

In this case, the recording mode of the audio signal is, for example, 1.
A 10 second mode that can compress and record 0 seconds worth of audio signals into one track, and a 20 seconds mode that can compress and record 20 seconds worth of audio signals into one track. It is being

Furthermore, when recording these video signals and audio signals, there is "independent recording" in which each is recorded separately, and "corresponding recording" in which both audio and image signals are recorded in a corresponding relationship.

D. Problems to be Solved by the Invention If it becomes possible to record video signals and audio signals on a video floppy as described above, in addition to recording the audio signal simultaneously with recording the still video signal, In some cases, only the video signal is recorded first, and then continuous sound such as BGM is added to the floppy disk on which only the video signal is recorded, or so-called dubbing is performed, such as adding comments to each still image. .

When performing such dubbing, you may prepare another unrecorded raw video floppy and edit and record the necessary still video signal and its corresponding audio signal on this floppy, or It is conceivable to erase unnecessary video tracks from a floppy disk on which only video signals have been recorded, or to search for an empty track and record an audio signal on that track.

However, the editing work described above is very troublesome, and it is especially difficult to determine the recording track position when adding continuous BGM to an entire floppy disk.

E. Means for Solving the Problems The present invention facilitates the dubbing of video compatible information such as audio signals. A recording mode is provided to set the track after the frame-by-frame video signal track, and in this recording mode, the video signal is recorded on the video signal track by skipping the above-mentioned video correspondence information for each field or frame. Record them sequentially.

F. Effect In the magnetic recording medium recorded in the above recording mode, the space between the video signal tracks remains as an unused video corresponding information track. Since this unused video compatible information track can be easily found, dubbing can be easily performed.

G Description of Example GL Recording Apparatus FIG. 1 shows an example in which the present invention is applied to an electronic still camera.

In Figure 1, (1) is the subject, (2) is the imaging lens, (3) is the shutter, (10) is the video signal system, and (20) is the shutter.
) indicates the audio signal system. In this example, the shutter (3) is an electromagnetic shutter, and the image sensor (
11) is a COD having a color separation filter.

In addition, (51) indicates a video floppy, and the magnetic sheet built in this floppy (51) is connected to the rotating shaft (52).
The magnetic sheet is rotated by a motor (53) at a field frequency, and a magnetic head (
31) and (32) are placed in opposition. In this case, these heads (31) and (32) are provided at equal angular positions with respect to the rotating direction of the magnetic sheet, and so as to be in contact with adjacent magnetic tracks, respectively.

These heads (31) and (32) are configured to be movable in the radial direction of the magnetic sheet by a motor (58), and a predetermined drive voltage is supplied to the motor (58) from a controller (59) to drive the head (31) and (32). ).

The track position on the magnetic sheet (32) can be changed arbitrarily.

(60) indicates a system controller that controls the overall operation of this camera. This system controller (60) is composed of a microcomputer, (61) is its CPU, (62) is a ROM in which programs for each company's processing are written, (63) is a RAM for the work area, (64) is an input port, (65) is an output port, and these circuits (62) to (65) are connected to the system bus (
66) to the CPU (61).

This system controller (60) includes a shutter switch for photography (71), an audio recording switch (72),
A mode switch (73) for selecting field recording and frame recording and a detection switch (74) are connected. The switch (74) connects this camera to a floppy disk (
51) is used to detect this. Further, (75) is a skip recording mode switch which predetermines an audio track and records a video signal by skipping the track position.

Further, a pulse generator IR (54) is provided opposite the center core of the floppy (51).
1) One pulse PC per rotation of the magnetic sheet
is extracted as a signal indicating the rotational phase, and this pulse PG is sent to the system controller (6) through the shaping amplifier (55).
0), and the system controller (60) supplies the switch (
Various control signals are extracted at predetermined timings in response to the operations 71) and (72). In addition, from the system controller (60), there is a circuit (15).

(2B), (33), and (34) are also supplied with respective control signals.

Furthermore, (80) indicates a clock forming circuit, which is supplied with pulse PG and control signals from the system controller (60) to form various clocks at predetermined timings.
Supplied to each circuit.

Explanation of G2 normal recording mode First, the normal video recording mode will be explained.

As shown in FIG. 2A, when the shutter switch (71) is pressed at an arbitrary time t1, a control signal is supplied from the system controller (60) to the shutter (3), and as shown in FIG. The shutter (3) is opened across L2, the image of the subject (1) is projected onto the CCD (11), and the image of the subject (1) is projected onto the CCD (11).
), the 'ili charge image is accumulated.

If the switch (73) is set to the field W recording mode, then at time t3 of the first pulse PC after time C2, as shown by solid lines in C and D of the figure, The forming circuit (
80) to CCD (11) read clock RDCK
is supplied, and a color video signal Sc for one field is taken out from the CCD (11) as shown by the solid line in FIG.

This signal Sc is then supplied to the video processing circuit (13) through the preamplifier (12), where the luminance signal and color signal are extracted from the signal Sc, and these signals are transferred to the recording circuit (13).
4) and has data such as field recording or frame recording.
d is supplied from the system controller (6o) to the recording circuit (14), and the signal S c + S d is a recording signal in the format of an electronic still camera and video floppy (an FM signal modulated by a luminance signal and a red and blue signal). Addition signal of the line-sequential FM signal modulated by the color difference signal and the DPSK signal modulated by the data signal Sd)
It is said that This signal Sv is then applied to the switch circuit (15
), and a control signal is also supplied from the system controller (60) to the switch circuit (15), and as shown by the solid line in F in the figure, the signal Sv is taken out during the period t] to t4,
This signal Sν is supplied to the recording head (31) through the recording amplifier (16) and the video side contact of the video/audio switch circuit (33), where it is recorded as one annular track on the floppy disk (51). Ru.

On the other hand, when the switch (73) is set to the frame recording mode, the signal RDC) Therefore, as shown by solid lines and broken lines in E and F of the figure, signals Sc and Sv are respectively taken out over one frame period t3 to t5 from time t3.

The signal Sv then passes through the switch circuit (15) and recording amplifier (16) to the switch circuit (33).

(34) and the switch circuit (33)
.

(34) is controlled by the system controller (60), and the signal Sv in the first half field period t3 to t4 is controlled by the switch circuit (
The signal Sv in the latter field period t4-t5 is supplied to the head (31) through the switch circuit (33).
) is supplied to the head (32). therefore,
One frame of signal Sv is recorded on the floppy disk (51) as two adjacent magnetic tracks.

Further, as shown in FIG. 3A, when the recording switch (72) is turned on during an arbitrary period Ta, the audio signal during the on period Ta is recorded. That is, an audio signal Sa from a microphone is supplied to a low-pass filter (23) through an input terminal (21) and a preamplifier (22), and is band-limited and extracted to a signal Sa of, for example, 5 kllz or less, and this signal Sa is used for recording. time axis compression circuit (25) through the noise reduction circuit (24) of
is supplied to This compression circuit (25) is, for example, an A/
It consists of a D converter, a pair of memories that have a capacity for 20 seconds and perform reading and writing alternately, a D/A converter, and a memory controller that controls writing and reading of the memory. Figure B.

As shown in C, the signal Sa is A/D converted and sequentially written into a pair of memories alternately every 10 seconds and every 20 seconds according to the 10 seconds mode and 20 seconds mode.
The information is read out at a faster speed than when it is written, and is D/A converted so that one track's worth of information is obtained every 0 seconds and every 20 seconds. Therefore, from the compression circuit (25), a signal St obtained by time-axis compressing the audio signal to one track, that is, a little less than a field period, is taken out every 10 or 20 seconds.

Then, this signal St passes through the adder circuit (26) to the FM
The signal Sf is supplied to the modulation circuit (27) and converted into an FM signal Sf, and this signal Sf is supplied to the switch circuit (28), and a control signal is supplied from the system controller (6o) to the switch circuit (28) to generate the signal St. The signal Sf is taken out during the period , and each signal Sf is supplied to the recording head (31) through the recording amplifier (29) and the switch circuit (33), and is sequentially recorded on different tracks of the floppy disk (51).

Also, at this time, from the system controller (60) to the encoder (
41), and an identification signal St is generated for each signal St, as shown in the third diagram, for example. This signal St includes, for a certain signal St, a flag indicating whether the signal St is the last signal, that is, whether the signal St continues thereafter, and a track number when the tracks or sectors are continuous. It has a code signal indicating the

This signal Si is then supplied to the adder circuit (26), added to the signal St, and recorded on the floppy disk (51) as the signal St as described above.

The above is the basic configuration and operation of an electronic still camera that can also record audio.

G3 Description of Skip Recording Mode Next, the case where the skip recording mode is performed by pressing the skip mode switch (75) will be described.

This skip recording mode is a mode in which only a video signal is recorded, and an audio track is determined in advance, and a video signal track is formed by skipping this audio track position.

An example of the recording operation in this skip recording mode will be explained with reference to the flowchart of FIG.

First, it is determined whether or not the ski/7p mode skimp switch (75) has been pressed (step (101)). If the switch (75) has been pressed, the process proceeds to step (102), and the ski/I-lid switch is pressed. It is determined whether or not (71) is pressed. When the shutter switch (71) is pressed, the process advances to step (103) and the mode switch (71) is pressed.
Depending on the state of 3), it is determined whether the recording mode is frame recording or field recording. In the field recording mode, the process proceeds to step [104], where one field of video signal is recorded as one track by the head (31) as described above. When this one field recording is completed, the motor (58) is activated via the controller (59).
), the drive voltage is supplied to the heads (31) and (3
2) is moved by two tracks, that is, one track adjacent to the recorded video track is skipped to the next track position (step (105)). Then °ζ,
The process enters a standby state for recording the next video signal (step [106]), and then returns to step (101).

Further, when it is determined in step (103) that the frame recording mode is selected, the process proceeds to step knob (107), and as described above, one frame of video signal is transferred to two tracks by heads (31) and (32). , Vll and Vi2. When this one frame recording is finished,
Proceeding to step (10B), drive voltage is supplied to the motor (58) through the controller (59), The next track is skipped and moved to the next track position. After this step (108), step (1
The process advances to step (101) to enter a standby state for recording the next video signal, and then returns to step (101) to repeat the above operations.

Therefore, in the skip recording mode and in the field recording mode, the track Au designated for audio as shown by the broken line in FIGS. 5A and 6A is skipped on the magnetic sheet of the floppy (51). In the figure, every other track Vi is indicated by a solid line.
The video signals are recorded sequentially as follows.

In addition, in the skip recording mode and in the frame recording mode, the track Au designated for audio as shown by the broken line in FIGS. 5B and 6B is skipped on the magnetic sheet of the floppy disk (51). Video signals are sequentially recorded in two tracks VH1 and Vi2, each indicated by a solid line in the figure.

As described above, the position of the audio track Au is determined in advance and the audio track is left as an unrecorded portion, so that actor recording of audio signals can be easily performed.

Especially in skip recording mode, if one video floppy is used for field recording or frame recording,
Since the position of the audio track Au is fixed on the floppy disk, dubbing is easier.

Also, even if field recording and frame recording are mixed, the audio track is between the video tracks,
By detecting the video track as well as the identification signal Sd, the audio track can be easily identified, and in this case as well, continuous audio signals such as BGM can be automatically recorded.

Furthermore, in this invention, since the track adjacent to the video signal track is reserved as an audio track, during dubbing, audio information corresponding to the recorded content of the video track is recorded on this adjacent audio track. This has the advantage of faster access time.

In other words, when reserving audio track positions for dubbing, it is conceivable to group these audio tracks together at a specific position, but if you do this, you will not be able to record audio signals in correspondence with video signals. In this case, during playback, the head must access the grouped audio track positions each time, resulting in a disadvantage that the access stroke becomes long and the access time becomes slow. It has the advantage of not having any drawbacks.

Also, even when audio tracks are grouped together in this way, access time can be shortened by providing an entire floppy audio memory, but such memory is large and expensive. be. In this respect, in the case of the present invention, the access time is short and the audio signal memory has a capacity of one track.

Note that the above explanation has been based on an example of an audio signal as a signal corresponding to a video signal, so the track to be skipped is for audio, but the signal corresponding to a video signal provided for dubbing is limited to an audio signal. Of course not.

Further, in the above example, one track is skipped for dubbing, but two or more tracks may be skipped, of course.

1 (Effects of the Invention According to this invention, during recording, for example, a track for a signal corresponding to a video signal such as an audio signal is reserved for post-recording, and this track is skipped to record the video signal. Therefore, during dubbing, audio signals etc. can be easily recorded on the reserved track.

In addition, since this reserved track is adjacent to the video signal track, when information associated with the video signal of the adjacent track is recorded on this reserved track, the access time during playback is short and a good result is achieved. It can be played back.

Wlffi explanation of the drawings Fig. 1 is a block diagram of an example of the device of this invention, Figs. 2 and 3 are diagrams for explaining the same, Fig. 4 is a flowchart of the operation of the main part of this invention, and Fig. 5 and FIG. 6 are diagrams for explaining the recording results according to the present invention.

Vi and v1□+V12 are video signal tracks, Au
is the audio signal track, (75) is the skip mode switch, (51) is the video floppy, (31) and (32) are the magnetic heads, and (58) is the head (31) and (32) of the floppy (51). This is a motor for accessing the magnetic sheet in the radial direction.

Claims (1)

[Claims] In an apparatus for recording a video signal or an information signal corresponding to the video signal as concentric tracks on a magnetic recording medium, the track after the video signal track in units of one field or one frame is the above-mentioned track. It has a recording mode that is preset as an information signal track corresponding to the video signal, and in this recording mode, the video signal skips the information signal track every one field or every frame and sequentially enters the video signal track. A recording device adapted to be recorded.