JPS62178079A - Magnetic disk recording and reproducing device - Google Patents

Abstract

PURPOSE:To eliminate a fear of erroneous rewriting of another pair of video signal and audio signal by providing a rewrite control means which takes only a video signal reproduced as a still picture just before and an audio signal related to this video signal as the object at the rewrite time. CONSTITUTION:The audio signal is read from a track and is written in a memory 16, and a head 3 is fed to a video track corresponding to the audio signal. The video signal is reproduced from this track, and the audio signal related to this video signal is read out from the memory 16 and is reproduced. It is judged whether reproduction of the audio signal is terminated or not; and if it is terminated, it is judged whether the sequence is terminated or not. If the sequence is not terminated, the head 3 is fed to the following track in the same sequence; but otherwise, the head 3 is fed to the start track of the following directory.

Description

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

A. Industrial field of application B0 Overview of the invention C1 Prior art 1 Problems to be solved by the invention E1 Means for solving the problems (Fig. 1, Fig. 5, Fig. 1O, Fig. 13) , Fig. 14) F1 Effect G, Example G1 Overview of the configuration of the magnetic disk recording/reproducing apparatus (Figs. 1 to 4) Operation panel of the G2 magnetic disk recording/reproducing apparatus (Fig. 5) G3 magnetic disk recording/reproducing apparatus Description of functions and operations of each mode (FIGS. 6 to 17) H0 Effects of the invention A, Industrial application field The present invention relates to a magnetic disk recording/reproducing device.

B3 Summary of the Invention The present invention provides a magnetic disk recording and reproducing apparatus that records video signals and audio signals related to the same on a magnetic disk and reproduces the same. By rewriting only the signal and the related audio signal, it is possible to rewrite the signal without disturbing the correlation between the signal contents of the video signal and the related audio signal without knowing the recording status of each track. , and prevents the risk of accidentally rewriting another set of video signals and related audio signals.

C8 Prior Art Conventionally, a magnetic disk recording and reproducing apparatus has been proposed in which information signals such as still video signals and related audio signals are recorded on each trunk of a magnetic disk and the information signals are reproduced.

D0 Problems to be Solved by the Invention In such conventional magnetic disk recording and reproducing devices, video signals and related audio signals are recorded and reproduced by specifying recording tracks. If you do not know what kind of signal is recorded on which track, it may disturb the correlation between the signal contents of the video signal and related audio signal set, or cause the signal to be recorded on another set. There is a risk that the video signal and audio signal may be erroneously rewritten.

In view of the above, the present invention can disturb the correlation between the signal contents of a set of video signals and audio signals related to blurring, or disturb the correlation between the signal contents of a set of video signals and audio signals related to blur, even if the recording status of each track is not known. The present invention is intended to propose a magnetic disk recording/reproducing device that is free from the risk of erroneously rewriting audio signals related to this.

Means for Solving the E1 Problem The present invention provides a magnetic disk recording and reproducing apparatus which records video signals and audio signals related thereto on a magnetic disk (1) and reproduces them. The present invention is characterized in that it includes a rewriting control means that rewrites only the video signal that was previously reproduced as a still and the audio signal related thereto.

F2 Effect According to the present invention, at the time of rewriting, only the video signal that was reproduced as a still image immediately before and the audio signal related thereto are to be rewritten.

G. Example Hereinafter, an example of a magnetic disk recording/reproducing apparatus to which the present invention is applied will be explained with reference to the drawings.

G. Overview of the configuration of the magnetic disk recording and reproducing device First, the first
A magnetic disk recording/reproducing apparatus according to an embodiment will be described with reference to the drawings. (1) is a magnetic disk called a still video floppy disk, which is housed in a flat cartridge.

This disk (1) is provided with 50 tracks on which FM-modulated still video signals and time-compressed audio signals related thereto are recorded, and one cue trunk. A control code signal as shown in FIG. 2 is multiplexed on this time-compressed audio signal. This control code signal includes control data such as the track number, the first audio trunk number of the sequence, the following audio track number, the corresponding video track number, and the compression time (time compression ratio). Note that in addition to video signals and audio signals, digital data signals can also be recorded, but this will not be mentioned here.

This disk (1) is rotated at 3,600 rpm when recording and reproducing an NTSC video signal, and at 3,000 rpm when recording a CCIR video signal.

The video signal is recorded for one field on one trunk, so if only the video signal is recorded on the disc (3), one disc (1) can hold up to 50 fields (
=25 frames) of video signals can be recorded.

(2) is a spindle motor that rotationally drives the disk (1), and a drive signal from a system controller (15) is supplied to this motor (2) through an amplifier (18). The system controller (15) has a microcomputer and controls the entire device so that each mode of operation is performed based on button operations to be described later.

(3) is a magnetic head for recording and reproducing, which moves on the radius of the disk (1). (4) is a recording/reproduction changeover switch, the movable contact of which is connected to the head (3). A fixed contact on the playback side of the switch (4) is connected to a video playback circuit (including an FM demodulator) (6) and an audio playback circuit (9) through a playback amplifier (5). The video signal from the video playback circuit (6) is supplied to the encoder (7) and converted into NTSC, C
It is converted into a television signal such as a CIR system and outputted to an output terminal (8). Further, the audio signal from the audio reproduction circuit (9) is supplied to the system controller (15).

On the other hand, the recording side fixed contact of the switch (4) connects the video recording circuit (including the FM modulator) (
12) and an audio recording circuit (13). From the input terminal (line input terminal) (10), NTSC, CCr
A television signal such as R format is supplied to a decoder (11), and the video signal obtained from this is sent to a video recording circuit (
12). In addition, the system controller (15
) is supplied to an audio recording circuit (13).

(16) is a memory connected to the audio reproduction circuit (9) and the audio recording circuit (13), and this memory (16) performs time compression of the audio signal during recording and time expansion of the audio signal during playback. .

(17) are various button switches, and by operating these, various operations described below are performed.

It is assumed that either a video signal or an audio signal is recorded on each track of the disk (1).

FIG. 3 shows an example of one sequence of recording signals, in which video signals V7 and ■2 are recorded on arbitrary different tracks, respectively, and audio signals A1 (VI) and A2 related to the video signal V are recorded.
(Vl ), A3 (Vl ) are recorded on arbitrary different trunks, and the audio signal A associated with the video signal v2
4 (V2) and As (V2) are respectively recorded on arbitrary different tracks. Further, the correspondence relationship between these video signals and audio signals is illustrated in FIG. Generally speaking, an l-sequence recording signal corresponds to a still video signal of one or more fields (frames) recorded on two or more tracks, and a still video signal of one or more fields (frames) of this one or more fields (frames). It consists of an audio signal recorded on one or more tracks.

Operation Panel of G2 Magnetic Disk Recording and Reproducing Apparatus Next, an example of the operation panel of the magnetic disk recording and reproducing apparatus of the embodiment will be described with reference to FIG.

In the figure, (20) indicates the operation panel as a whole.

(21) is an opening/closing lid for the magnetic disk insertion slot. (22
) is an eject button for ejecting the disc.

(23) is an audio level meter. (24), (25
), (26) are the compression time sums for selecting the compression time of the audio signal recorded on one track, and the compression time is 5sec each.
c, 10 sec, 20 sec. (27), (
28) and (29) are START, PAUSE, and END buttons for starting, pausing, and ending audio signal recording, respectively. (3
0) is a volume legitimate child. (31), (32), (33)
are playback, record, and rewrite buttons for playback, recording (recording preparation state), and rewriting (rewriting the recorded signal of a track) of a video signal or an audio signal, respectively. (34a
) and (34b) are field and frame buttons for selecting whether to record video signals in field units or frame units. (35) is a video recording button for recording a video signal (recording a video signal to a trunk where no signal is recorded).

(36) and (37) are an all erase button and an erase button for erasing all trunks and one sequence of recorded signals, respectively. (38) is a dubbing button. (39),
(40) is an amplifier and down button for program selection. (41) is a still button for still reproduction of a video signal.

(42) is a playback button for playing back an audio signal.

(43) is a power switch button for turning on and off the power.

Description of the functions and operations of each mode of the G3 magnetic disk recording/reproducing apparatus Next, the functions and operations of each mode of the magnetic disk recording/reproducing apparatus of the embodiment will be explained with reference to FIGS. 6 to 17.

■Track search (Fig. 6) After the power switch button (43) is pressed to turn on the power, when the disk (1) is inserted into the disk insertion slot of the device (step 5T-101), the spindle motor (
2) rotates step 5T-102), head (3)
is one trunk at a time (in the order of tracks No. 011 to 50)
The disk (1) is sent in the radial direction (step ST-1).
03), the high frequency signal (RF multiplied signal) of the track is read (step 5T-104), and the presence or absence of the high frequency signal and the presence or absence of the recording signal are detected (step ST-1).
05). If no high frequency signal is detected, step 5T
Returning to step ST-103, if a high frequency signal is detected, read the control code signal recorded together with the audio signal (step ST-106), and then store the correspondence between each track number and its sequence number (directory).
Write to [memory of system controller (15)] (
Step 5T-107). And truck No. 50
Step ST-108).
If the track has not been reached yet, return to step ST-103 and repeat steps ST-103 to ST-108. When track No. 50 is reached, direct the head (3) to the first track of IJN0.1 ( voice trunk) (step ST-109). Thereafter, the mode shifts to ① standard playback mode in FIG. still,
During steps 5T-101 to 5T-108, operation of the mode button etc. is prohibited.

■Standard playback mode (Figure 7) First, the audio signal is read from the trunk and stored in the memory (1
6) (step 5T-201), and then sends the head (3) to the video track corresponding to the audio signal (step 5T-201).
Step 5T-202). Then, the video signal is played back from that track, and the audio signal related thereto is read out from the memo IJ (16) and played back (step 5T-
203).

Next, it is determined whether or not the reproduction of the audio signal has ended (step 5T-204). If it has not ended, the process returns to step 5T-203; if it has, it is determined whether the sequence has ended or not. is determined (step ST'-20
5). If the sequence is not finished, head (3)
to the next audio track in the same sequence (step 5T-206), then return to step 5T-201, and if finished, send the head (3) to the first track (audio track) of the next directory (step 5T-206). Step 5T-
207). After that, repeat this ■Standard playback mode.

■Still mode (Fig. 8) When the still button (41) is pressed, it is determined whether or not the mode is playback mode (step 5T-301), and when it is not the playback mode, no operation is performed, but when the playback mode is If so, then it is determined whether the still mode has already been established (step 5T-302). If the still mode is not already in effect, still mode is executed by pressing the still button (41), and after the audio signal being played ends, only the video signal is played back (step 5T-303), and then that video signal is played back. (Step 5T-30)
4). If the still mode is already in effect, the still operation is canceled by pressing the still button (41), so the corresponding audio track is read from the directory stored in the memory (step 5T-305), and then the head ( 3) to the read audio track (step 5T-306). Thereafter, the mode shifts to the standard playback mode (2) in FIG.

■Program selection (Figure 9) Amplifier or down button (39) for program selection,
When (40) is pressed, it is determined whether it is in recording mode or not (
Step 5T-4, 01): If the mode is recording mode, nothing is done; if not, it is determined whether the mode is still mode (step 5T-402). If it is not the still mode, the first track (audio track) of the next (or previous) sequence is read from the directory stored in the memory (step 5T-403), and then the head (3) is sent to the read audio track. (Step 5T
-404). Thereafter, the mode shifts to the standard playback mode (2) in FIG. If it is the still mode, it is determined whether or not an audio signal is being recorded (step 5T-405). If no audio signal is being recorded, read the audio track corresponding to the video signal on the next (or previous) sequence from the directory stored in memory (step 5T-406), and then move the head (3) to its audio trunk. Step 5T: read the audio signal and store it in the memory (16).
-407), then sends the head (3) to the corresponding video signal track, plays the video signal, and memo U
The audio signal is read from (16) and reproduced (the audio signal is reproduced only once) (step 5T-408). If the audio signal is being recorded, it is determined whether or not the rewrite mode is in progress (step 5T-409). In the rewrite mode, the 0 audio recording end (steps ST to 410 in FIG. 17)
), the process moves to step 5T-406. When not in rewrite mode (when in dubbing mode), the 14th
Step 5T-411) Next, the video track on the next (or previous) sequence is read from the directory and the still playback of that video signal is performed (Step 5T-411). -412).

■Rewrite mode (Fig. 10) When the still button (41) is pressed during playback mode and still playback is activated, if you press the rewrite button (33),
It becomes possible to rewrite the video signal being reproduced still and the audio signal sequence related thereto. Then, one field (frame) of the video signal is erased, and a new video signal is rewritten and recorded. In a certain sequence, when there is no video signal and only audio signal,
Video signal paste writing means recording of a new video signal. All audio signals related to a certain video signal are rewritten. When the number of tracks of the new audio signal is greater than the number of tracks of the original audio signal, the excess audio signal is recorded on a new track where no signal is recorded. Conversely, when the number of tracks of the new audio signal is smaller than the number of trunks of the original audio signal, the audio signal of the remaining tracks is deleted. This rewriting is completed by pressing the end button (29).

When the rewrite button (33) is pressed, it is determined whether the mode is rewrite recording mode or playback mode (step 5T-501).
), no operation is performed in the rewrite recording mode, and it is determined whether or not the still mode is in the playback mode (step 5T-502). If it is not in still mode, after the end of the audio signal being played, only the video signal is
It reproduces for sec (step 5T-503). When in the still mode or after step 5T-503, a rewrite operation is performed, and at this time, both the video signal output and the audio signal output are set to the EE mode (the line input signal becomes the output signal as it is), and the recorded It is possible to record (rewrite) a video signal or an audio signal onto a track (step 5T-504).

■Record mode (Figure 11) When the record button (32) is pressed, it is determined whether the mode is record mode or write playback mode (step 5T-601)
. When in the recording mode, the recording mode is canceled and the mode is shifted to the playback mode (step 5T-602). When the rewrite playback mode is on, the mode is set to recording standby [video signal and audio signal output are set to BE (line input signal is set to BE). output signal)] and send the head (3) to the empty track indicated by the directory (Step 5T-603
), then field and frame buttons (34a), (3
By switching the field/frame changeover switch by pressing either one of step 4b), it is determined whether recording is performed in field units or frame units (Step 5T-
604).

(2) Reproduction mode (FIG. 12) When the reproduction button (31) is pressed, it is determined whether the mode is reproduction mode or write recording mode (step 5T-701). No operations are performed in playback mode. In the rewrite recording mode, it is determined whether or not the audio signal is being written to the memory (16) (step 5).
T-702), no operation is performed unless writing is in progress, and if writing is in progress, the process moves to @audio recording end (step 5T-703) in Figure 17, and then the first track of the sequence just recorded (audio The head (3) is moved to the trunk (step 5T-704).

Thereafter, the mode shifts to ① standard playback mode in FIG.

■Video recording mode (Fig. 13) When the record button (32) is pressed, the monitor output signal becomes the line input signal itself. In this state, press the video record button (35
), the video signal will be recorded on the track where no signal is recorded. When both the record button (32) and playback button (31) are pressed, if you then press the video record button (35), the lamps of the record buttons (3, 2) will go out and the video signal just recorded will be played back. It will be done.

When the video record button (35) is pressed, it is determined whether the mode is rewrite, record, or playback (step 5T-801).
). In the rewrite mode, the recording signal is erased (step 5T-802), then the video signal is recorded with the field/frame unchanged (step 5T-803), and then the transition to still mode is made (step 5T-802). -804). In the recording mode, a video signal is recorded (step 5T-805), and then the head (3) is sent to an empty track indicated by the directory (step 5T-806). When in playback mode, no operations are performed.

■Audio recording mode (Fig. 14) Audio signals can also be recorded by pressing the record button (32) or playback button (31). In audio recording when the record button (32) is pressed, the video track indicated by the control code signal of the track where the audio signal is recorded is the track immediately before that recording button (32) was pressed and recording was performed. Become. In audio recording when the playback button (31) is pressed, the video track being played back is designated at the time of audio recording (dubbing). At this time, recording of the audio signal is started by pressing the start button (27). The assignment of the audio signal to the video signal is completed by pressing the pause button (28). The entire sequence is ended by pressing the end button (29).

When the audio recording start button (27) is pressed, it is determined whether the mode is playback mode (after-recording mode), rewrite mode, or record mode (step 5T-901). When in playback mode (dubbing mode), it is determined whether or not it is in still mode (step 5T-9).
02) If it is not the still mode, no operation is performed; in the still mode, the track on which the audio signal is recorded is determined (step 5T-903), and then the audio compression time (compression ratio) selection button is pressed. By pressing (24) to (26), the compression time (compression ratio) of the audio signal is read and the audio signal is written into the memory (16) (step 5T-904).

Then, it is determined whether the write time to the memory (16) is shorter than the write time limit for one track Tc (step 5T-905), and if it is short, this determination is made again, and if it is long, the head (3) ) to the audio recording track and determine the next audio recording track.Step 5T-9
06) Then, an audio signal and a control code signal (the video track is a playback track and the next audio track is an automatically determined track) are recorded (step 5T-9).
07), then send the head (3) to the playback video track (step 5T-908), and then, if a pause was executed directly or between step 5T-905 and step 5T-906, execute a pose off (step 5T-908); −
909) and returns to step 5T-904).

In the rewrite mode, write the rewritten audio track table to the memory of the system controller (15) and create it.Step 5T-910) Next, press the audio compression time (compression ratio) selection buttons (24) to (26) to create the rewritten audio track table. The signal compression time (compression ratio) is read and the audio signal is written to the memory (16) (step 5T-
911).

Then, the writing time to the memo IJ (16) is the limit time T
It is determined whether or not it is shorter than c (ste knob s'F-91
2) If it is short, this judgment is made again, and if it is long, it is judged how many N rewritten audio tracks remain in the memory table (Ste Nobu 5T-913). If there are no rewritten audio tracks left in the table (N=O
), head (3) is sent to the audio recording track, and the next audio recording track is determined (step 5T-914).
Then, the audio signal and the control code signal (the video trunk is the playback track, and the next audio recording trunk is the automatically determined track) are recorded (step 5T-91).
5). The number of remaining audio tracks to rewrite the table is N
When ≧2, the head (3) is sent to the first track on the table (step 5T-916), and then the recording signal of that track is erased (step 5T-917).
), then record the audio signal and control code signal [matching (this means rewriting the control code signal so that it matches the control code signal of the audio trunk before and after the same sequence)] ( Step 5T-918), then erase the erase track on the table (Step 5T-919), and if pause is executed directly or between Step 5T-912 and Step 5T-913, execute pause off (Step 5T-920). ) and returns to step 5T-911.

When the number N of audio tracks to be rewritten is N-1, the next audio track is determined (step 5T-921) f&, and the process moves to Ste/Knob 5T-916.

When in recording mode, determine the audio recording track (step 5T-922), then determine the audio compression time (compression ratio).
By pressing the selection buttons (24) to (26), the compression time (compression ratio) of the audio signal is read and the audio signal is written to the memory (I6) (step 5T-923).
Next, it is judged whether the writing time is shorter than the limit time Tc (step 5T-924), and if it is short, this judgment is made again, and if it is long, the head (3) is sent to the audio recording trunk and the next audio recording is started. A track is determined (step 5T-925), and then an audio signal and a control code signal (the video trunk is the video track of the previous recording, the next audio track is the automatically determined track) are recorded (step 5T-926). ), then directly or step 5
When the pause is executed between T-924 and Step 5T-925, the pause is canceled (Step 5T-927).
) Return to step 5T-923.

[Phase] Audio recording pause (Figure 15) When the audio recording pause button (28) is pressed, the memo I
Even if the writing time to J (16) is shorter than the limit time Tc, the writing of the audio signal to the memory (16) is aborted, and after recording the audio signal, the video signal is still played back in the playback mode, and in the rewrite and recording mode. No action is taken at the time.

When the pause button (28) is pressed, it is determined whether or not an audio signal is being recorded (step 5T-1001), and if it is not recording, no operation is performed, and if it is recording, it is determined whether it is a pause or not. is determined (step 5T-1002), and if it is not a pose, the routine moves to the pose routine of FIG. 14 (step ST-1003), and if it is a pose, a pose off is executed (step 5T-1004).

■ End of audio recording (Figure 16) When the audio recording end button (29) is pressed, it is determined whether or not an audio signal is being recorded (step 5T-1101), and if it is not recording, no operation is performed. , if recording is in progress, move to @audio recording end in Figure 17 (step 5T-
1102).

■Audio recording end (Figure 17) When the end button (29) is pressed, the mode is changed, the disc (1) is ejected, or there are no free tracks left, the end button is pressed. −
Enter Chin. In the end sequence of the Relay I-mode, the continuity with the unrewritten audio signal that follows the rewriting of the audio signal is maintained.

It is determined whether the mode is playback mode (dubbing), light moto, or recording mode (step 5T-1201)
. When in playback mode (dubbing), the bellybutton l-” (3)
to the audio recording track/) (Step 5T-1202
), then record the audio signal and control code signal (including sequence end information) (step 5T-1203)
Then, the head (3) is sent to the reproduction video track (step 5T-1204), and then still reproduction of the video signal is performed (step ST-1205).

In the rewrite mode, it is determined whether there are any unwritten tracks (step ST-1206). If there is no unwritten track, send the head (3) to the audio recording track (step ST-1207), then record the audio signal and control code signal (matching) (step 5T-1208), then proceed to step 5T- described below. 121
Move to 3.

If there is an unwritten track, send the head (3) to the first track on the table (step ST-1209);
Next, the recording signal of the L rack is erased (step 5T-1210), and then the audio signal and control code signal (matching) are recorded (step 5T-1).
211), then erase the audio signal of the remaining track (Step 7B 5T-1212), and then send the head (3) to the playback video track (Step 5T-1213).
, then performs still playback of the video signal (step 5T-
1214).

When in the recording mode, the head (3) is sent to the audio recording track (step 5T-1215), and then the audio signal and control code signal (the video trunk includes the previous recording track, and the audio trunk includes end information). (
Step 5T-1216).

■Press the dubbing playback button (31), connect the slave recording and playback device to the recording and playback device, and press the dubbing button (38) to check the recording capacity of the slave side disk, and the sequence you are trying to dub can be dubbed. It is determined whether or not.

In this state, the entire sequence is dubbed. 1
When dubbing of one sequence is completed, the mode shifts to playback mode.

[Phase] When the erase all erase button (36) is pressed, the recorded signals of all tracks on the disk (1) are erased. When the erase button (37) is pressed, one sequence of recorded signals is erased. When erasure of one sequence of recorded signals is completed, the directory number and remaining capacity of the next sequence are displayed on the monitor receiver.

H0 Effects of the invention According to the invention described above, even if the recording status of each track is not known, it is possible to disturb the correlation between the signal contents of a set of video signals and audio signals related to this, or It is possible to obtain a magnetic disk recording and reproducing device that is free from the risk of accidentally rewriting video signals and audio signals related thereto.

[Brief explanation of drawings]

Fig. 1 is a block diagram showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of signals, Fig. 3 is an explanatory diagram of trucks, Fig. 4 is a corresponding diagram of signals, and Fig. 5 is an illustration of the operation panel. Explanatory diagram, Figure 6~
FIG. 17 is a flowchart for explaining the functions and operations of the present invention. (1) is a magnetic disk, (3) is a magnetic head, (6) is a video playback circuit, (9) is an audio playback circuit, (12) is a video recording circuit, (13) is an audio recording circuit, (15) is A system controller, (16) a memory, and (17) various button switches.

Claims (1)

[Claims] In a magnetic disk recording and reproducing device that records a video signal and an audio signal related thereto on a magnetic disk and reproduces the same, when rewriting, the video signal that has been reproduced as a still image immediately before is rewritten. and a rewriting control means for rewriting only the audio signal related thereto.