JPS63283375A - Recorder - Google Patents

Abstract

PURPOSE:To effectively use a sound recording track maintained at the time of photographing by deciding the sound recording track at the time of detecting an identification signal for indicating the sound recording track. CONSTITUTION:A reproducing signal is inputted to a flag detecting circuit 24, the output of a flag detecting signal is inputted to a system controller 26 to discriminate that the sector #0 of the reproduced track is a type 4 or not. When the sector #0 is not the type 4 it is displayed that a sound recording cannot be executed in this track by a display means 36. When the sector #0 is the type 4, a change over switch 6 is changed over to an erasing circuit 17 side and this track is erased by a head 20. During this erasing or an operation in the vicinity thereof, a sound signal stored in a memory 31 via an encoder 28, a change over switch 29 and an A/D converter 30 is read from the memory 31 synchronously with the rotation of a floppy and the sound is recorded on this track by the head 20.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an audio recording apparatus, such as a still video recording apparatus, and particularly to a still video recording apparatus for performing after-recording.

[Conventional technology]

2. Description of the Related Art Conventionally known still video recording devices are known to be configured so that they can record and reproduce not only video but also audio over a certain period of time. Video floppy footage recorded with a still video camera,
When performing after-recording (dubbing) to record the corresponding audio on a still video recording device, use unrecorded tracks on the video floppy, or after erasing unnecessary tracks from the recorded video tracks.
use. Recording is performed based on the still video floppy standard established by the still video floppy conference.

[Problems to be solved by the invention] However, in the above conventional example, necessary audio recording (dubbing) cannot be performed because there are no unrecorded tracks, or there are few or no unnecessary video tracks that can be erased. There was a drawback.

[Means for solving problems]

According to the present invention, when an identification signal indicating that the track is for audio recording (dubbing) is detected in each block of the recording medium, means is provided for determining that the track is for audio recording (dubbing). .

[Function] With the above configuration, it is possible to effectively utilize the post-recording track secured during shooting.

〔Example〕

FIG. 1 is a block diagram of a first embodiment of the present invention, and FIG. 2 is a flowchart thereof. Note that for the sake of brevity, descriptions of recording and reproducing color signals are omitted.

The system controller 26 uses the mechanical control 21 to move the head 20 to a certain track. The signal reproduced by 20 is sent to a selector switch 19, a preamplifier 8,
De-emphasis circuits 1o and 22 via FM demodulator 9
Then, it is input to the ID detection circuit 23. The output of 22 is sent to a flag detection circuit 24, a control code detection circuit 25,
It is input to the changeover switch 29.

24 is a circuit for detecting a flag indicating the usage status of each sector of the audio track divided into four sectors. still,
Each sector is configured as shown in Figure 49, and these flags consist of a start flag at the beginning of the sector and an end flag at the end of the sector.The use of each sector is determined by the combination of the polarities of these two flags. Status is recorded. This is shown in FIG. By detecting the flag during playback, it is possible to distinguish between a video track and an audio track, and also to determine the usage status of each sector.

A description of dubbing in the present invention will be given below.

When a video floppy is inserted, 26 moves 20 to a certain track by 21 in response to input switch 35. Reproduction is performed as described above, and the reproduction signal is input to 24. The flag detection signal output of 24 is input to 26, which determines whether sector +0 of the track being reproduced is of type 4 or not. 26 if seftana 0 is not type 4
The display means 36 indicates that dubbing cannot be performed on this track. If sector +0 is type 4,
The selector switch 6 is switched to the erasing circuit 17 side, and the track is erased by the recording amplifier 7 and 20 via the recording amplifier 7 and 19. The encoder 28, the changeover switch 29, and the A/D converter 3 are operated during or before and after this erasure.
The audio signal stored in the memory 31 via 0 is read out from 31 in synchronization with the rotation of the floppy, and is sent to the D/A converter 32) switch 33, addition circuit 14, pre-emphasis circuit 13, switch 3, After passing through the FM modulator 4, the adder circuit 5, and 6.7.19, the audio is recorded (dubbed) on this track by the 20. Note that in 14, a flag and a control code are added.

In this way, when sector ≠ 0, which is the first sector of a certain track, has a type 4 flag, that is, when the usage status of the first sector means "unused," this track is marked as "not a video track." ”, and it can be determined that “no audio signal is recorded”. The present invention aims to make effective use of a certain track by providing means for determining that the track is a track to be used for dubbing when the track is in such a state.

For example, when recording video with a still video camera or video floppy recorder, following the video track,
For example, by recording type 4 flags in all four sectors on the next track, it becomes possible to secure the above-mentioned post-recording track in advance during video recording. FIG. 6 schematically shows the relationship between recorded flags and video floppies.

Note that the determination is not only made based on whether or not sector ≠ 0 is a type 4 flag, but also sector ≠ 0, sector + 1, sector ≠ 2).
The determination may be made when all four sectors of sector +3 are detected as type 4 flags. As long as sector≠0 is included, it does not matter whether the determination is made in combination with any other combination.

FIG. 3 is a flowchart of a second embodiment of the present invention.

This will be explained below using FIG.

The second embodiment uses the user's area of the ID signal used for video signal recording to perform the determination performed using the flag used for audio signal recording in the first embodiment. As in the first embodiment, track movement and track reproduction are performed, and the output of the head 20 is input to the ID detection circuit 23 via 19.8.9. 23 detects the ID code,
Output to 26. 26, if there is a signal recorded in the user's area of the ID code according to a prior agreement, erase and dubbing are performed, and if there is no signal, it is displayed that dubbing cannot be performed.

Similarly to the first embodiment, when recording video with a methyl video camera or video floppy recorder, following the video track, for example, a signal indicating that the next track is a post-recording track is placed in the user's area of the ID code. By recording according to a prior agreement, it is possible to secure the above-mentioned post-recording track in advance at the time of video recording.

In addition, in both the first and second embodiments, the description was given of identifying the dubbing track and performing dubbing; of course, it is not necessary to only identify the dubbing track and not erase or record it. .

When a post-recording track is detected during video floppy playback, it is also possible to prevent that track from being played back.

Also, when recording, if a post-recording track is detected,
It is also possible to wait for the next operation in a recording ready state (ledge standby).

〔Effect of the invention〕

As explained above, according to this embodiment, when an identification signal indicating that a certain track of a video floppy is a track for audio recording (dubbing) is detected, the track for audio recording (dubbing) is detected. By having a means for determining whether the recording is correct or not, it is possible to effectively utilize the dubbing track secured at the time of shooting.

This makes it possible to prevent the drawbacks of the conventional example in which necessary dubbing cannot be performed because there is no unrecorded trunk during dubbing, or there are few or no unnecessary video tracks that can be erased.

Therefore, the audio signal can be recorded satisfactorily after recording the video signal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the present invention, FIG. 2 is a flowchart of the first embodiment of the present invention, and FIG. 3 is a flowchart of the second embodiment of the present invention.
Flowchart of the embodiment, FIG. 4 is a schematic diagram showing the signal arrangement of the sectors, FIG. 5 is a table showing the relationship between the sector usage status and flags, and FIG. 6 is the recording for setting the post-recording track according to the present invention. FIG. 3 is a diagram schematically showing the relationship between flags and video floppy disks. 23...ID detection circuit 24...Flag detection circuit

Claims (4)

[Claims] (1) In a recording device that records video signals and audio signals in each block on a recording medium, when an identification signal indicating a block set for audio recording is detected, the block is assigned to an audio recording track. A recording device characterized by having means for determining that. (2) In the recording device according to claim (1), it is possible to determine that the track is an audio recording track by detecting a track on which a flag indicating that the track is not used for audio recording is recorded. Characteristic recording device. (3) In the recording device according to claim (1), the audio recording track can be tracked by detecting a track in which a signal indicating that the track is an audio recording track is recorded in the identification signal superimposed on the video signal. A recording device characterized in that it determines that. (4) A recording apparatus according to claim (1), wherein the recording apparatus erases a track determined to be an audio recording track and performs audio recording.