JPH01256065A - Recording device and reproducing device - Google Patents

Abstract

PURPOSE:To automatically produce a recording medium for recording a sound and a corresponding image in such places as adjacent to each other by providing an input and output means for a control signal for a cooperative operation with a source of the image and the sound and recording the image and the sound which are corresponding to each other into the adjacent areas of the recording medium. CONSTITUTION:In case of a sound signal having a corresponding image, the reproducing device 10 outputs V.rec signal. When the recording device 12 receives this V.rec signal, the track number of the corresponding image is made as FFHEX stored previously, and the sound signal having been stored in a sound memory is recorded to a magnetic disk at a previously received time compressibility. In case of a frame recording of the image corresponding to the sound in a still video format, an outer circumferential track number out of two recorded tracks is regarded as the corresponding image track number to be recorded to its sound track control code, so that the outer circumferential track number is stored. By this method, the magnetic disk recorded with the sound and the corresponding image closely to each other can automatically be produced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a recording device and a reproducing device for dubbing a recorded signal from a recording medium on which images and sounds are mixedly recorded to another recording medium.

[Conventional technology]

A magnetic disk, which is a recording medium in a still video recording and reproducing apparatus, has a recording method for audio signals, and generally has image signal tracks and audio signal tracks mixed together. Furthermore, an audio signal may be recorded on a single track or may be recorded over multiple tracks. Furthermore, an audio signal may have a corresponding image signal recorded thereon, or may not have a corresponding image signal recorded thereon.

Here, the audio recording format of the magnetic disk will be briefly explained. The track on which audio is recorded (audio track) on a magnetic disk is divided into four sectors (sector*t, s2.13.t4) as shown in Figure 5, and one sector is divided into four sectors as shown in Figure 6. As shown, it consists of a start flag, a control code, an audio signal portion, and a stop flag. At the front of the audio signal portion, an overlap portion with the previous audio recording is provided so that continuous audio reproduction is possible. Furthermore, the audio signal is recorded in a time-compressed manner. As a control code,
The recording track number and audio time compression rate, if continuous audio is recorded, the first track number of the continuous audio, the following track number, and the image record if the corresponding image signal is recorded. The track number (FF, ltx if no corresponding image exists), etc. are recorded.

With the above format, after recording an image, it is possible to record (dub-record) the audio corresponding to the image.

[Problem to be solved by the invention]

However, when audio is recorded later, images and audio that correspond to each other may be recorded on tracks that are far apart. In such a case, during playback, it takes time to find the corresponding track, resulting in a muting state in which playback is interrupted. In order to prevent this muting state from occurring, the magnetic disk on which dubbing has been performed may be dubbed so that the corresponding image signal and audio signal are recorded on adjacent tracks.

In order to perform dubbing to adjust the recording order,
Conventionally, this has been done solely by hand to easily connect a reproducing machine, a recording machine, and a signal line for applying a reproduction signal from the reproducing machine to the recording machine. Because it relies on human hands, for example, it is difficult to accurately match the timing of playback and recording, which leads to problems such as failure and easy to make mistakes during operations.

Therefore, it is an object of the present invention to provide a recording device and a reproducing device suitable for automatically executing such a dubbing operation to arrange the recording order.

[Means to solve the problem]

A recording device according to the present invention is a recording device that records signals on a recordable recording medium by mixing image recording tracks and audio recording tracks, and includes input means for image signals and audio signals, and input means for inputting the image and audio signals. and an input/output means for inputting and outputting control signals for cooperative operation with the source, and records mutually corresponding images and sounds in adjacent areas of the recording medium.

A playback device according to the present invention is a playback device that plays back a signal from a recordable recording medium by mixing image recording tracks and audio recording tracks, and is capable of cooperating with a recording device that records this playback signal. It is characterized by comprising input/output means for control signals.

[Effect]

By providing the above-mentioned control signal, the playback device and the recording device can be operated cooperatively so that images and sounds corresponding to each other are recorded in adjacent areas.

〔Example〕

Hereinafter, one embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows an overall configuration block diagram of an embodiment of the present invention. 10 is a playback device that plays back the source magnetic disk; 12 is a playback signal (image and audio) from the playback device 10;
14 is an image signal, 16 is an audio signal, and 18 is a control signal for operating the playback device 10 and the recording device 12 in synchronization.

Details of the recording device 12 are shown in FIG. 2A. First, a normal recording operation will be explained. The system controller 20 causes the head drive circuit 22 to move the magnetic head 26 to a designated track position on the magnetic disk 24 to make it ready for recording. Further, the motor 28 rotates at a predetermined number of rotations using the PG detection pulse and the known configuration of the servo circuit 30. The input image signal 14 is converted into a recording signal format by a recording circuit,
Emphasis processing is performed by the pre-emphasis circuit 34. At the timing of image recording, the system controller 20 switches the switch 36 to the a contact side and causes the ID generation circuit 38 to generate an IO times signal which is information such as the track number to be recorded. The output of the pre-emphasis circuit 34 is applied to the FM modulation circuit 40 via the switch 36, and the FM
Modulated. The adder 42 outputs the output of the FM modulation circuit 40,
10 signals from the ID generation circuit 38 are added. Adder 4
The output of 2 is amplified by the recording amplifier 44, and the output of
is recorded on the magnetic disk 24.

The audio signal 16 is subjected to noise reduction and conversion processing into a recording format in a recording circuit 46, and is then sent to an A/D converter 48.
, is applied to a time axis compression circuit consisting of an audio memory 50 and a D/A converter 52. That is, by adjusting the writing speed and successive output speed to the audio memory 50, an audio signal compressed at a predetermined time compression rate can be obtained. The output of the D/A converter 52 is applied to an adder 54, and the adder 54 is
The flag (start/start signal) supplied from the flag generation circuit 56
flag and stop flag) and the control code supplied from the control code generation circuit 57. The output of the adder 54 is applied to the FM modulation circuit 40 via the pre-emphasis circuit 58 and the switch 36, and thereafter, as in the case of the image signal, the output is applied to the magnetic disk 2.
Recorded in 4.

Details of the playback device 10 are shown in FIG. 2B. First, normal playback operation will be explained. The system controller 60 uses the head drive circuit 62 to position the magnetic head 65 on a designated track on the magnetic disk 64 . In addition, the servo circuit 66
And the motor 67 rotates the magnetic disk 64 at a predetermined speed.

The output of the magnetic head 65 is amplified by a reproduction amplifier and applied to an FM demodulation circuit 70, an ID detection circuit 71, and a discrimination circuit 72 that discriminates whether it is audio or image. If the reproduced signal is an image signal, the ID signal is detected by the 10 detection circuit 71, and the demodulated signal of the FM demodulation circuit 70 is supplied to the reproduction circuit 75 via the de-emphasis circuit 74. The reproduction surface path 75 outputs the reproduction image signal 14. The synchronization separation circuit 73 separates a synchronization signal from the output of the FM demodulation circuit 70 and applies it to the system controller 60 .

If the reproduced signal is an audio signal, the output of the F demodulation circuit 70 is applied to the de-emphasis circuit. A flag detection circuit 80 detects a start flag and a stop flag, and a control code detection circuit 81 detects a control code and supplies both to the system controller 60. A/D converter 77, audio memory 78
and D/A converter 79 constitute a time axis expansion circuit, and system controller 60 writes the output of A/D converter 77 to voice memo IJ 78 in response to detection of the start flag, and The signal stored in the audio memory 78 is read out at a timing according to the time compression ratio signal, and the time axis is expanded. The reproducing circuit 82 reproduces the output of the D/A converter 79 and outputs the reproduced audio signal 16.

Next, the operation when dubbing will be explained.

FIG. 3 is a timing chart of the reproduction signal 14.16 and the dubbing control signal 18, FIG. 4A, FIG. 4B, and FIG.
FIG. C shows a flowchart of the recording device 12. Reference numeral 90 in FIG. 2A and reference numeral 92 in FIG. 2B are interface circuits for the dubbing control signal 18. In Figure 3, (1
) indicates the dubbing period, DUB signal, (2) indicates the continuous audio reproduction period, A, seq signal, (3) indicates the recording period of the reproduced image signal, V, rec signal, and (4) indicates the reproduction image signal. V and F signals indicating whether it is a field image or a frame image,
(5) is the V, 1ess signal that indicates that the reproduced audio does not have a corresponding image, and (6) is the A, tc that indicates the time compression rate.
The double signal (7) is an Ack signal supplied from the recording device 12 to the playback device 10 for handshaking, and (8) is the playback image signal 14 (the numbers in the figure are explanatory numbers to indicate that the images are different). ), (91 is the reproduced audio signal 1
6 (The numbers in the figure are explanatory numbers of the corresponding images,
0” indicates that there is no corresponding image. ).

The dubbing period will be specifically explained with reference to FIG. Each part is controlled by a system controller 20.
60 does, but in the following explanation, is it just a recycled bag? &10,
It's called the record bag y112. When a dubbing start switch (not shown) is closed, the playback device 10 starts recording on the magnetic disk 64.
Play all the tracks once, and then play part 10. Control·
It reads the code and flag and creates a track information table for the source magnetic disk. Thereafter, the tracks will be played back in order based on this track information table. When the track information table is created, the Dub signal is set to H (Tl in FIG. 3). When the recording device 12 confirms that the Dub signal is H (Sl), the magnetic head 2
6 to the first track of the magnetic disk 24 (S2
), outputs the Ack signal to the playback device 10 (S2, 3)
, upon receiving the Ack signal, the playback device 10 starts normal playback operation based on the previously created track information table, and at the same time receives the A, seq signal, V, rec signal, and V rec signal.
, F signal to the recording device 12 (T2). This allows the recording device 12 to know the start of reproduction. Third
In the example in the figure, the A, seq signal and the V, rec signal are H, V.
, P signal is H (field picture).

Since the A, seq signal is H (34, 5), start writing to the audio memory 50 (S21), V, rec
Since the signal is HlV and the F signal is H (522, 23)
, the reproduced image is field recorded, the magnetic head 26 is moved to the next track (S24), and the track number on which the image is currently being recorded is stored as the image track number corresponding to the audio signal stored in the audio memory 50. Do (33
8). After this process, the recording device 12 sends A to the playback device 10.
A ck signal is output (S32). The playback device 10 is
When receiving the ck signal, V, rec signal and V, F
The output of the signal is stopped, and a signal times A and tc indicating the audio time compression rate is output (T3). Note that the reproduced image signal 14 is recorded during the period T2 to T3 when the V and rec signals are output, and this period is very short, and all the stored signals in the audio memory 78 are read out during this period. Since there is no storage, the muting state of the image signal that occurs to access the next audio track does not occur. Therefore,
Images can be recorded well.

When the recording device 12 receives the A and tc times signal from the playback device 10 (S33), it outputs an Ack signal to the playback device 10 (534), and the playback device 10 stops outputting the A and tc times signal (T4).

Since the A, seq signal is H, when there is no free space in the audio memory 50, the stored signal in the audio memory 50 is recorded on the magnetic disk 24 at the time compression rate based on the previously received A, tc signal, and the overlap is 542) to clear the audio memory 50 while leaving the reproduced audio signal 16.
are subsequently captured into the audio memory 50.

When the V,rec signal becomes H at T5, indicating a change in the reproduced image (S41), the memory signal in the audio memory 5-0 is recorded, and the audio memory 50 is cleared leaving the overlapped portion (542), V, Since the F signal is H (54″
3) field-record the input image signal, move the magnetic head 26 to the next track (S45), and store this recording track as an image track number corresponding to the audio (34B); send the Ack signal to the reproduction device; Output to 10. In response to this Ack signal, the playback device 10 outputs V and Re.
The output of the c signal, V, and F signals is stopped (76 in Fig. 3).

Since T6 to T7 is a very short time, good image recording can be performed without causing a muting state. T6-T7
Then, similarly to T4 and T5, if there are few remaining storage signals in the audio memory 50, they are recorded on the magnetic disk 24 (S39).

When the playback device Z10 outputs a V, 1ess signal at T7, indicating that there is no corresponding image for the audio signal from here (S44), the content of the audio memory 50 is changed to the one corresponding to the image track recorded earlier. It is recorded on the magnetic disk 24 as (S47). The recording device 12 memorizes that there is no corresponding image for the audio from here (FF oix) and records (
S50), and outputs an Ack signal to the playback device 10 (S50).
51).

At T9, when the A and Seq signals become L and it is notified that the reproduction of continuous audio has ended (S35), the acquisition of the reproduced audio signal to the audio memory 50 is stopped 537
), the stored contents are read out using the previously stored time compression ratio, the corresponding image track number is added to the control code as FF□8, a stop flag is set, and the data is recorded on the magnetic disk 24 (S38). Move the magnetic head 26 to the next track and clear the audio memory 50.
40) Outputs an Ack signal to the playback device 10 and returns (S52). The playback device IO responds to this Ack signal and starts the next playback operation. At the same time as the playback device 10 starts playing back the audio for which there is no corresponding image from the TIO,
, seq signal and V.

1ess signal is output to the recording bag W, 12.

When the A, seq signal becomes H (S゛4), the recording device 12 outputs
), start importing the audio signal into the audio memory 50 (521), V, rec signal is L, V, 1ess signal is H (322, 26), so FF++ sets the corresponding image track number for the audio from there. ! 530) and outputs an Ack signal (S32). If the V and tess signals are L, it is a signal transmission error, so the audio memory 50
527) and requests the playback device 10 to redo the playback (S31). When the playback device 10 receives the Ack signal, it outputs the A and tc image signals, and when it receives the Ack signal again from the recording device 12 (S34), it stops outputting the A and tc image signals (T12).

Since the audio signal from T13 has a corresponding image, the playback device 10 outputs the V, rec signal.

When the recording device 12 receives the V, rec signal (S41
), FFIIE that has previously memorized the track number of the corresponding image
X, and the audio signals stored up to that point in the audio memory 50 are recorded on the magnetic disk 24 at the previously received time compression rate (S42). Since the V and F signals are L, the image signal is recorded over two tracks as a frame image (S46
). In still video formats, if the image corresponding to the audio is frame recording, the outer track number of the two recorded tracks is recorded in the control code of the audio track as the track number of the corresponding image. Therefore, the outer track number is stored (S49).

When the A and seq signals become L at T15, the recording device 12 stops capturing the audio signal into the audio memory 50 (537), sets a stop flag, and records the audio (S3B). ), clears the audio memory, and outputs an Ack signal (S52). At T16, the reproducing device 10 outputs the V, rec signal while keeping the A, seq signal at L, and reproduces an image without an audio signal. Recording bag y112 has A, seq signal is L (S4), and V.

Since the rec signal is H (S6) and the V and F signals are L (S7), the image signal is recorded over two tracks as a frame image (S9), and the Ack signal is output (S51).
.

At T18, the Dub signal becomes L and dubbing ends.

Through the dubbing operation described above, it is possible to automatically create a magnetic disk on which corresponding images and sounds are recorded close to each other.

Since the operation of the playback device 10 is the same as the normal playback operation, the dubbed audio and images can be easily confirmed through a speaker, a video monitor device, and the like.

Furthermore, in this embodiment, signals to be copied and various control signals are serially transmitted, and
A timing signal may be transmitted between the two to cause them to operate cooperatively. The ^ck signal may be a method in which the received signal is returned as is.
In this embodiment, an independent recording device and a reproducing device are connected to each other, but the same applies to a double deck type dubbing device in which a system controller is shared between the recording system and the reproducing system.

〔Effect of the invention〕

As can be easily understood from the above description, according to the present invention, it is possible to automatically create a recording medium that records audio and images that correspond to each other in adjacent locations.

[Brief explanation of the drawing]

FIG. 1 is a basic configuration block diagram of an embodiment of the present invention, and FIG.
Figure A is a block diagram of the configuration of the recording device 12, Figure 2B is a block diagram of the configuration of the playback device IO, Figure 3 is a dubbing chart of dubbing operation, and Figures 4A, 4B, and 4C are the block diagram of the recording device 12. An example flowchart, FIG. 5 shows an audio track in a still video floppy, and FIG. 6 shows a signal format of one sector of the audio track.

Claims (2)

[Claims] (1) A recording device that records signals on a recordable recording medium by mixing image recording tracks and audio recording tracks, and cooperative operation between an input means for image signals and audio signals and a source of the images and audio. What is claimed is: 1. A recording device comprising input/output means for inputting and outputting control signals for recording mutually corresponding images and sounds in adjacent areas of a recording medium. (2) A playback device that plays back signals from a recordable recording medium by mixing image recording tracks and audio recording tracks, and inputting and outputting control signals for cooperative operation with the recording device that records this playback signal. A reproducing device comprising means.