JPS62178080A - Dubbing device - Google Patents

Abstract

PURPOSE:To well reproduce signals without interrupting the reproducing with the search work of an audio signal, by recording the audio signal corresponding to a video signal on a track adjacent to this video signal at the dubbing time. CONSTITUTION:In case of recording of the video signal, magnetic heads 77 and 14 are moved to prescribed tracks by the control of a system controller 15, and a changeover switch 9 is connected to a fixed contact 9a, and the video signal is recorded while switching racks as required in accordance with data in a memory 19 for table. In case of recording of the audio signal, heads 7 and 14 are moved similarly, and the switch 9 is connected to a fixed contact 9b. Data are supplied to an information signal generating circuit 20 from the memory 19 by the indication from the controller 15 to generate a signal API, and signals SID and EID are generated by an identifying signal generating circuit 22, and they are mixed with an audio signal AS from a deemphasis circuit 11 by a mixing circuit 23, and the output of the circuit 23 is recorded on a prescribed track of the second magnetic disc 2 through a preemphasis circuit 24, the switch 9, and an FM modulating circuit 13.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention provides a recording medium in which a video signal recording track and an audio signal recording track are mixed and recorded, which is suitable for use, for example, in a magnetic disk of an electronic still camera. This invention relates to a dubbing device.

[Summary of the invention]

The present invention provides a dubbing device for a recording medium that records and forms a mixture of video signal recording tracks and audio signal recording tracks, which is suitable for use on, for example, a magnetic disk of an electronic still camera. By recording the audio signal corresponding to the video signal on a track adjacent to the predetermined track when recording the video signal on the predetermined track of the second recording medium, the second recording medium after dubbing can be recorded. When playing back, the playback device can quickly search for the audio signal that corresponds to the video signal because it is adjacent to the video signal, and the playback can be played smoothly without being interrupted by the search for the audio signal. It is.

[Conventional technology]

The present applicant has previously proposed, for example, in Japanese Unexamined Patent Publication No. 58-218004, a so-called electronic still camera for recording still images that can also record audio. On a magnetic disk recorded by such an electronic still camera with an audio recording function, video signal tracks and audio signal tracks coexist. There are two types of recording formats for audio signals: one that ends on a single track and one that is recorded over multiple tracks.Also, there are cases in which an audio signal corresponding to the video signal exists and cases in which it does not exist. , these pieces of information are recorded in a control data recording area within the audio signal track. That is, when a series of audio signals is recorded across multiple tracks, the first track number (or address) and the following track number (address) are recorded in the control data recording area, and this Recording track number (address) of the video signal corresponding to the audio signal
is recorded in the control data recording area. When playing back this magnetic disk, when the playback device detects the existence of an audio signal corresponding to each video signal based on the signals in the control data recording area of each track, it searches for this corresponding audio signal. Therefore, when a video signal is played back on a monitor television or the like, audio is played back at the same time.

[Problem that the invention seeks to solve]

However, as mentioned above, when trying to reproduce an audio signal together with a video signal, it may take time to search for the audio signal that corresponds to the video signal, and it may take time to reproduce the required part. There was an inconvenience that the
The audio signal is not necessarily recorded at the same time as the video. For example, it is possible to first record only the video signal for multiple tracks on a magnetic disk, and then record the audio signal later along with the video recorded by so-called dubbing. be. In this case, another video signal may be recorded on a track adjacent to the corresponding video signal recording track, and in this case, the audio signal is recorded on an unrecorded track that is away from the corresponding video signal recording 1-rank. must be recorded. If corresponding video signals and audio signals are recorded on separate tracks in this way, it takes time to search for the corresponding track during playback, resulting in a long so-called muting state in which playback is not performed. There was an inconvenience that even if an attempt was made to play back the video continuously, the playback would become discontinuous.

In view of the above, an object of the present invention is to provide a dubbing device that can record video signals and audio signals in correspondence and search for audio signals in a short time during playback.

[Means for solving problems]

The dubbing apparatus of the present invention, for example, as shown in FIG. In a dubbing device that records on a recording medium (2), when a video signal reproduced from a first recording medium (1) is recorded on a predetermined track of a second recording medium (2), audio corresponding to this video signal is recorded. The signal is recorded on a track adjacent to a predetermined track.

[Effect]

The dubbing device of the present invention records an audio signal corresponding to a video signal in a track adjacent to the video signal during dubbing, so that when the second recording medium (2) that has been dubbed is played back, the playback device Since the audio signal corresponding to the video signal is adjacent to the video signal, it can be quickly searched for, and reproduction can be performed satisfactorily without interruption due to the search operation for the audio signal.

〔Example〕

Hereinafter, one embodiment of the dubbing apparatus of the present invention will be described with reference to the accompanying drawings. The dubbing device of this example is a magnetic disk dubbing device used in the above-mentioned electronic still camera with an audio recording function.

First, the recording format of the audio signal on the magnetic disk to which dubbing is performed by the dubbing device of this example will be explained. In FIG. 2, any one audio track AT on the magnetic disk +11 has four sectors S
It is divided into ^, SR+Sc, and sD, and in one sector, an audio signal AS that has been time-axis compressed based on a format (sector format) as shown in FIG. 3 is recorded. A start identification signal SID as a start flag is placed in front of this audio signal AS, and an end identification signal END as an end flag is placed behind the audio signal AS.
An information signal API serving as a control code for controlling the reproduction operation of the audio signal is arranged.

Here, the disk (1) is driven to rotate at, for example, 3600 rpm, and at this time, the head scanning time for 1 track is 1/60 seconds, so 1 sector is about 1/240 seconds, and the audio signal shown in FIG. The recording time of AS will be longer than this, but by compressing the time axis of the audio signal to be recorded to, for example, about 1/640, it is possible to record an audio signal of about 10 seconds per track. . Furthermore, for longer continuous audio signals,
It is possible to record across a plurality of tracks, and the information regarding the relationship between the tracks at this time is recorded as part of the Jochu Doishi-go API, which serves as the control code. This information signal API also includes information on the recording track number (address) of the video signal corresponding to the audio signal recorded on the track.

That is, the control code data of the information signal API includes at least the current track number Nt, the first I/rank number Nf in the case of continuous audio, and the subsequent track number Nn.
, further includes the number of the video track on which the corresponding video signal is recorded (corresponding track number) Nc, and also includes data regarding the time compression mode, sector usage status, etc., as necessary. There is. When a series of temporally continuous audio signals is recorded across multiple tracks, the track numbers Nf and Nn are the track number Nf where the beginning of the series of audio signals is recorded and the audio signal currently being recorded. Each continuous portion represents the track number Nn recorded. Note that a so-called overlap portion OVL is provided at the end of the audio signal As in FIG. 3, overlapping with the adjacent end of the audio signal of the adjacent sector, to enhance the continuity of the audio signal between sectors.

The configuration of the magnetic disk of this example on which audio signals are recorded as described above will be described below. FIG. 1 is a diagram showing the overall configuration of the dubbing device of this example. 1) Already recorded?
! (video signal and audio signal) to the second magnetic disk (2
). Each magnetic disk +1
1 and (2) are disk drive motors (3) and (
4), each disk drive motor (
The rotational drive speeds of the magnetic disks (1) and (2) according to 3) and (4) are detected by rotational speed detectors (5) and (6), and the timing signal generation circuit (18) described later is detected.
This speed detection pulse signal is supplied to.

The recorded information on the first magnetic disk (11) is recorded on the magnetic head (
The signal reproduced by the magnetic head (7) is supplied to the FM demodulation circuit (8). This FM
The reproduced signal demodulated by the demodulation circuit (8) is transferred to the first fixed contact (9a) of the changeover switch (9), to the monitor television (10), to the de-emphasis circuit (11) and to the synchronization separation circuit II! 3 (12). The reproduced signal obtained at the first fixed contact (9a) of the changeover switch (9) is transferred to the FM demodulation circuit (1) by switching the movable contact (9c).
3) to the magnetic head (14), and is recorded on the second magnetic disk (2) by this magnetic head (14). Furthermore, the video signal is monitored by supplying the demodulated playback signal to the monitor television (10). A synchronization signal of the reproduced signal is supplied to the system controller (15) via the synchronization separation circuit (12). Furthermore, the reproduced signal is supplied to an identification signal detection circuit (16), an information signal detection circuit (17), and a mixing circuit (23) via a de-emphasis circuit (11). The identification signal detection circuit (16) detects the above-mentioned audio signal from the reproduced signal!・Detect the identification signal SID and end identification signal BID, and check the detected identification signals SID and EID.
is supplied to the timing signal generation circuit IaI (18), and the start identification signal SID is supplied to the information signal detection circuit (17).
). The information signal detection circuit (17) detects the above-mentioned information signal API of the audio signal from the reproduced signal by supplying the start identification signal SID, and transmits the detected information signal API to the system controller (15) and the timing signal generation circuit ( 18). The system controller (15) causes the supplied information signal API to be recorded in the table memory (19). Furthermore, the storage contents of this table memory (19) are made so that the storage area can be converted by the system controller (15).

The information signal API stored in the table memory (19) in this way is supplied to the information signal generation circuit (20) under control from the system controller (15). The information signal API created by this information signal creation circuit (20)
is encoded by an encoder (21) in synchronization with a signal from a timing signal generation circuit (18), and this encoded information signal API is supplied to a mixing circuit (23).

Also, the number of times the timing signal was generated is 1t! The identification signal generation circuit (22) generates the identification signal SI in synchronization with the signal from 8 (1B).
Create D,EID, and use this identification signal SID and E,ID.
is supplied to the mixing circuit (23). The mixing circuit (23) is
The reproduction signal from the de-emphasis circuit (11) is mixed with the information signal API and the identification signals SID, EID, and this mixed signal is sent to the second fixed contact of the changeover switch (9) via the pre-emphasis circuit (24). 9b).

This mixed signal is sent to the magnetic head (14) via the FM conversion circuit 13) by switching the movable contact (9c).
and is recorded on the second magnetic disk (2) by this magnetic head (4).

Also, a magnetic head (7) on the first magnetic disk (1)
and a magnetic head (14) on the second magnetic disk (2)
supply drive current from the system controller (15) to the head drive motors (27) and (28) via the head drive circuits (25) and (26), respectively, and the head drive motors (27) and (28) The magnetic heads (7) and (14) are moved onto predetermined tracks.

Here, the table memory (1
The memory map in 9) will be explained. FIG. 4 is a diagram showing the memory map of the table memory (19). In FIG. 4, the memory block for one track consists of 26 bits, bit bo'''b25.

The six bits of bit bo=bs are assigned to its own track number N1 to indicate whether it is bit b6 or not. Also, bits b8 to b13
6 bits are assigned to the above-mentioned first track number Nf, and 6 bits of bits b'14 to bL9 are respectively assigned to the above-mentioned subsequent track number Nn, and bits b20 to b2 are assigned.
5 is assigned to the corresponding track number Nc. Such 26-bit memory blocks are prepared for the total number of tracks that can be recorded on one disk, for example, 50 tracks.

When reproducing a magnetic disk (11) on which audio recording tracks and video recording tracks coexist, first scan all tracks on the disk and read out at least the information signal API sequentially from, for example, the i-th track, and each obtained track number Nf, Nn, and Nc are respectively written to the corresponding positions in the table memory (19) along with their own track numbers NL.These respective track numbers Nf, Nn
, Nc is obtained only for audio tracks; for video tracks, the data for the corresponding audio track is obtained, or when the data for all audio tracks is written on the table. After that, the system controller (15) performs processing to obtain the track number Nc of the audio track corresponding to the video track, the first track number Nf related to the audio track, and the subsequent track number Nn, and use these as the video track number. Writing to the corresponding location in the memory block.

In other words, the corresponding track number Nc in the case of a video track
is the number of the track in which the audio signal corresponding to the video signal is recorded, and Nt' and Nn are the numbers of the leading track and subsequent tracks for the corresponding audio signal. In the manner described above, a table as shown in FIG. 5, for example, can be obtained.

The table shown in FIG. 5 contains >5 tables obtained from the magnetic disk +11 recorded as shown in FIG.
In FIG. 7, Vl-1 indicates the first track of the first segment of the video signal, and A,-1 indicates the first track of the first segment of the audio signal. In Fig. 5, according to the scanning order when scanning all tracks,
For example, the arrangement is such that the track numbers Nt increase sequentially from 1.

In this way, the data in the chiffle stored as shown in Fig. 5 is grouped into the same segment as shown in Fig. 6 under control from the system controller (15), and the order of the tracks is changed. .

In other words, in FIG. 6, items with the same leading number are rearranged according to the sequence, that is, according to the temporal order of a series of audio signals, so that the corresponding video signal track is arranged immediately after the series of audio signal tracks. I'm throwing away what I've organized. For example, in FIG. 5, Nt is 2.4.
Track 48 indicates an audio track in which a series of audio signals are recorded in this order, and a video signal is recorded in a track with Nt of 1, corresponding to an audio signal recorded in a track with Nt of 2. ing. Therefore, in FIG. 6, the track numbers Nu are rearranged in the order of 2, 4.48 according to the audio signal sequence. Then, as shown in parentheses in FIG. 6, the track numbers are converted in the order of the track numbers Nt, and corresponding to this conversion, the first track number Nf, the succeeding track number Nn, and the corresponding track number Nc are also changed (). As shown in (transform).

Based on the data of the track number Nt that has been replaced and ordered in this way, the data of the second magnetic disk (2) is sequentially transferred to the first magnetic disk +1 for each track.
) are recorded as shown in FIG. 7B. That is, for example, the second magnetic disk (2
), a video signal of Nt=1 is recorded on track number l,
An audio signal of Nt-2 is recorded on track number 2, and Nt-3 is recorded on track number 3 (Nt=
48) is recorded, and the audio signals are recorded in the same manner as above in the order of the new track numbers.

Here, when recording a video signal, the magnetic head (7)
and (14) to a predetermined track for playback and recording under control from the system controller (15), and connect the movable contact (9C) of the changeover switch (9) to the first fixed contact (9a). , the video signal is recorded as it is by changing the track as necessary according to the data in the table memory (19). In addition, when recording an audio signal, the magnetic head (7) and (
14) and move the movable contact (9) of the changeover switch (9).
C) is connected to the second fixed contact (9b). and,
Based on instructions from the system controller (15), data is supplied from the memory (19) to the information signal creation circuit (20) to create the information signal API, and the identification signal generation circuit (22) creates identification signals SID and EID. Ru.

Then, in the mixing circuit (23), the information signal API, the Oribetsu signals %srD, EtD, and the audio signal J+AS supplied from the de-emphasis circuit (11) are mixed, and the result shown in FIG.
The signal is recorded on a predetermined track of the second magnetic disk (2) via the pre-emphasis circuit (24), the changeover switch (9) and the FM modulation circuit (13).

By performing dubbing from the first magnetic disk (1) to the second magnetic disk (2) in this way, the video signal and audio signal are grouped together in the same segment, as shown in FIG. 7B. and an adjacent second magnetic disk (
2) is recorded. Therefore, when playing back this second magnetic disk (2) with a playback device, even if the first magnetic disk (11) has not been recorded segment by segment due to post-recording etc., the playback device The audio signal corresponding to the video signal can be quickly searched, and the muting state does not last long until the video and audio are played back by searching for the corresponding track, and for example, multiple videos can be played back in succession. In this case, the video is played continuously with the corresponding audio.

Note that the present invention is not limited to the above-described embodiments, and it goes without saying that various other configurations may be adopted without departing from the gist of the present invention.

〔Effect of the invention〕

According to the dubbing device of the present invention, the audio signal corresponding to the video signal is recorded on the track adjacent to the video signal during dubbing, so that when the second recording medium (2) that has been dubbed is played back, the playback device Since the audio (number %i) corresponding to the video signal is adjacent to each other, it can be quickly searched for, and there is an advantage that the audio signal can be reproduced satisfactorily without being interrupted by the search operation for the audio signal.

[Brief explanation of drawings]

FIG. 1 is a configuration diagram showing an embodiment of the dubbing device of the present invention;
FIGS. 2 to 7 are diagrams for explaining the example in FIG. 1, respectively. (13 is the first magnetic disk, (2) is the second magnetic disk, (15) is the system controller, and (19) is the table memory.

Claims (1)

[Scope of Claims] A dubbing device that reproduces a first recording medium in which a video signal recording track and an audio signal recording track are mixed, and records the reproduced signal on a second recording medium, comprising: When a video signal reproduced from the first recording medium is recorded on a predetermined track of the second recording medium, an audio signal corresponding to the video signal is recorded on a track adjacent to the predetermined track. dubbing equipment.