JP2890427B2 - Editing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an editing method in a recording device for a recording medium capable of recording an image and additional information of the image in association with each other.

[Related Art] As a recording medium capable of recording, for example, audio as an additional information in association with an image, for example, a still video floppy (hereinafter, referred to as an electronic still video conference) by an electronic still video conference
Simply called a floppy. ) There is an audio recording format. That is, the video signal is recorded on one annular track per field, two tracks are used for one frame of the video signal, and the audio signal is time-axis compressed by digital processing technology. The frequency band is increased to the band of the video signal, and recording is performed using the same recording processing system as the video signal. In the case of an audio signal, one track is composed of four sectors # 0 to # 3.
There are four types. That is, type 1 means that the next sector of the same track is continued, type 2 means that the recording of the track is finished, and the first sector of the next track of the sequence is followed by # 0, and type 3 is continued. Indicates the end of the sequence, and type 4 indicates unused or the remaining sectors of types 1, 2, and 3 of the track. As shown in FIG. 6, in each sector, a start flag is disposed before the time-axis-compressed audio signal, and an end flag is disposed after the time-based compressed audio signal. Identify.

One sequence of the audio signal starts with a type 1 sector and ends with a type 3 sector. FIG. 5 shows the type of each sector when one audio sequence is recorded on four tracks.

Each sector also contains a control code for controlling the sequence of the audio signal, the contents of which are shown in Table 1. With this control code, one sequence of the audio signal can be reproduced as a continuous sound. In addition, one still image is assigned to one trunk,
Sound can be reproduced while reproducing a still image.

[Problems to be Solved by the Invention] When it is desired to add a description of audio to one still image using such an audio format, the video and the audio are recorded simultaneously or the audio is recorded after the video is recorded. To record. However, in either case, if the recording fails, for example, if the reading of the original is mistaken, or if the explanation is too long compared to the recordable time, it is necessary to change a part of the recording. In such a case, for example, the still
If the same image can be associated multiple times in one sequence, such as the audio format of a video floppy, or if the same image can be associated with multiple sequences, I want to change it In order to specify a part and delete / record it, it was necessary to clearly understand the correspondence between the image and the sound.

Therefore, an object of the present invention is to provide an editing method that can easily perform such a change / correction operation.

Means for Solving the Problems An editing method according to the present invention is a method for editing a signal of a recorded area on a recordable recording medium in which an image and additional information of the image are associated with each other, A pre-processing step of setting a recorded area to be edited and a free area of a recording medium as a recordable area; an editing step; and a signal of an unnecessary recorded area remaining in the recorded area to be edited due to editing by the editing step. And a processing step of performing processing so as not to be read.

Embodiment An embodiment of the present invention will be described below with reference to the drawings. In addition, taking the case of still video floppy as an example,
The present invention is not limited to this, for example, using a solid-state memory,
The present invention can also be applied to a case where reproduction is performed from a medium in which image data or additional information corresponding to the image data is recorded for each storage block.

FIG. 1A is a block diagram showing a configuration of an audio signal recording and erasing system in a still video recording / reproducing apparatus, and FIG.
The figure shows a configuration block diagram of the audio and video reproduction system. No.
In FIG. 1A, an analog audio signal at an input terminal 10 is input to a time compressor 12, and the time compressor 12 compresses an audio input at a specified time-axis compression ratio (under the control of an audio control circuit 14). Conversion), and the adder 16 adds the start flag, control code, and end flag from the audio control circuit 14. The output of the adder 16 is FM-modulated by the FM modulation circuit 18.
Modulated, switch 20, recording amplifier 22 and magnetic head 24
Is recorded on the magnetic disk 26, which is a still video floppy. The switch 20 is connected to the contact a during recording, and is connected to the contact b during erasing. Reference numeral 28 denotes an erasing signal generating circuit for generating a recording erasing signal. Reference numeral 30 denotes a head drive circuit that moves the magnetic head 24 in the radial direction of the magnetic disk 26, 32 denotes a disk motor, 34 denotes a motor drive circuit that drives the motor 32, 36 denotes a system control circuit that integrally controls each part of the illustrated circuit, Reference numeral 38 denotes a switch device including various switches, and reference numeral 40 denotes a display device.

In FIG. 1B, a signal reproduced from the magnetic disk 26 by the magnetic head 24 is applied to the FM demodulation circuit 44 via the reproduction amplifier 42. The signal demodulated by the FM demodulation circuit 44 is applied to a video processing circuit 46 and a time expansion circuit 48. The video processing circuit 46 reproduces the signal from the video track,
A still image video signal is output to the output terminal 50, and a time expansion circuit
Reference numeral 48 indicates that the signal from the audio track is expanded on the time axis and returned to its original state, and the reproduced audio signal is output to the output terminal 52. An audio control circuit 54 controls the time expansion circuit 52. Other circuit elements common to FIG. 1A are denoted by the same reference numerals.

The operation of this embodiment will be described with reference to FIGS. 2, 3 and 4. In the editing mode, the reproduction mode is first set (S1), and the video is reproduced and the operation of the recording mode switch is waited (S2, 3). It is determined whether or not the video signal of the track being reproduced has a corresponding audio track (track on which the audio signal is recorded) by the recording mode switch (S4). However, this includes the case where an empty track is reproduced and an audio track corresponds to this empty track. If you have a corresponding audio track, it goes into edit mode (S
5), and that effect is displayed (S6). Then, it waits for an instruction from the stop switch, the recording mode switch (S7), the track feed command (S9) or the start switch (S12).

Stop switch or recording mode switch (S7)
To release the edit mode and enter the playback mode (S8).
Return to S3. If there is a track feed command (S9), the track is fed (S10), the track is reproduced, and the process returns to S4 (S11). In S11, in the case of an empty track or an audio track, the video output may be muted to indicate that it is an audio track or an empty track. Cycle through S7 and S9 until the start switch is pressed,
When the switch is pressed, the process proceeds to S31 (FIG. 3).

In this way, if the playback track has a corresponding audio track, the editing mode is set to rewrite the corresponding audio track, so that another audio sequence is not newly registered for one video track. In addition, a plurality of audio sequences do not correspond to one video track.

Next, the recording mode after S13 will be described. If the playback track has a corresponding audio track (S4), the recording mode is set (S13), and that is indicated by the LED or CRT display device (S14), and the stop switch or the recording mode is displayed.
It waits for an instruction from the switch (S15), the track feed command (S19) or the start switch (S22).

Stop switch or recording mode switch (S1
If 5) is pressed, the playback mode is set when the recording is not paused (S16, 8). If the recording is paused, the audio track recorded in the recording pause is deleted (S17). ), Only the flag is rewritten, and the same audio signal is recorded on the track again (S18), and the process proceeds to S8.
In other words, although the sector type of the audio track to be recorded in the recording pause state is one of (a) to (d) in FIG. 7, it is not possible to cancel the recording mode by the stop switch or the recording mode switch. At this point, the sequence ends, and the flag is temporarily erased and re-recorded in order to rewrite the flag to one of the types (e) to (h) in FIG. Of course, there is no need to rewrite when the reproduction is not hindered.

When there is a track feed command (S19), track feed is performed (S20), and the video of the track is reproduced (S2).
1).

Cycle through S15,19 until start switch is pressed,
When the start switch is pressed, the process proceeds to S61 (FIG. 4).

When the start switch is pressed in S12 of FIG.
(FIG. 3) to enter the edit mode. First, the memory in the time compressor 12 is cleared, and fetching of an audio signal into the memory is started (S31). Then, it is determined whether or not the audio track corresponding to the reproduced image to be edited has been erased (S32). If it has not been erased, one audio track is erased (S33). And the audio signal is 1
The stop switch (S34), until the recording time for the track is reached, and the data is stored in the memory of the time compressor (S37).
Pause switch (S35) or track feed command (S36)
Accept.

When one track is reached, the audio signal is recorded on the floppy for one track (S38). In this case, the recording compression ratio and the control codes W1, W3, W5 are the same as before the editing. The sector type is as shown in FIG.
If the total recording time has not been reached (S39), the video track to be edited is reproduced again (S40), and the process returns to S31. When the total recording time has been reached, the playback mode is set (S41), and the process returns to S2 (FIG. 2). Note that the total recording time refers to a recordable time of an audio signal on the floppy, including all audio tracks corresponding to the track being reproduced and all empty tracks on the floppy.

When the stop switch is pressed in S34, it is determined whether or not the sound being edited corresponds to the last video of the sequence (S51). One track of an audio signal is recorded in one of the sector types in h) (S53). If the sequence is not at the end of the sequence, one audio signal is recorded in any of the sector types in FIGS. 7A to 7D. Track recording is performed (S52). In both cases, the recording compression ratio and the control codes W1, W3, W5 are the same as before the editing. After S52 and S53, if there is still an audio track corresponding to the video track being reproduced, all the remaining tracks are deleted (S54 and S55). Then proceed to S41,
Enter playback mode.

When the pause switch is pressed or a track feed command is issued (S35, 36), one track is recorded with the same recording compression ratio and control code W1, W3, W5 as before editing (S42). The sector type at this time is shown in FIG.
(D). If the audio track before editing still remains, all the remaining tracks are deleted (S44), and if there is a track feed command (S45), the track is fed and the video of the track is reproduced (S48, 49). If there is no track feed command (S45), it is checked whether or not the audio track currently being edited corresponds to the last video track of the sequence (S46). The image is moved to the track or the empty track corresponding to the audio and the image is reproduced (S47), and the process returns to S3 (FIG. 2). In the case of the last track, the video track after the audio sequence is reproduced (S50), and the process returns to S13 (FIG. 2).

Next, the operation after S61 (FIG. 4) will be described. It is determined whether single recording (S) or continuous recording (C) (S61), the respective operations are displayed (S63, 64), the memory of the time compressor is cleared, and the audio signal is stored in the memory. Start (S6
Four). And stop until you take in one track
The switch (S65), the pause switch (S66) and the track feed command (S67) are accepted. When one track is taken in (S68), one track is recorded in the sector type shown in FIG. 7A (S69). In the case of continuous recording, the original image is reproduced (S71), and the process returns to S62 to continue taking the audio signal into the time compressor. In the case of single recording (S70), it is displayed that the single recording mode is paused (S78), the next image is reproduced (S74), and the process returns to S13 (FIG. 2). That is, S2
The pause state is established until the start switch is pressed in step 2 (FIG. 2).

When the pause switch is pressed or a track feed command is issued (S66, 67), one track is recorded in one of the sector types shown in FIGS. 7A to 7D (S72). In the case of the track feed command (S73), the track is fed and the track is reproduced (S75, 76). In the case of single recording, the process returns to S13 (FIG. 2), and in the case of continuous recording, the process returns to S62. Go on (S77).
If there is no track feed command (S73), the next image is reproduced and the process returns to S13 (S74).

In this embodiment, the audio signal is edited when the audio signal corresponds to the video track or the empty track. However, it is needless to say that the editing can be performed only for the audio that does not correspond to the video or the empty track. Further, the additional information added to the image is not limited to the audio signal, and may be, for example, a character signal or a code signal added to the image.

[Effects of the Invention] As can be easily understood from the above description, according to the present invention, when modifying an additional signal (for example, an audio signal) once recorded on a video signal recorded on a medium, Can be automatically re-recorded up to additional information and empty areas, thereby greatly improving usability. Furthermore,
Since the signal recorded in the area remaining after editing is made unreproducible, the remaining area can be effectively used for recording an image.

[Brief description of the drawings]

FIG. 1A is a block diagram showing a configuration of an audio recording and erasing system in the still video recording system, and FIG. 1B is a block diagram showing a configuration of a video and audio reproducing system thereof.
FIG. 5 is an operation flowchart of FIG. 1, FIG. 5 is an example of a change in the recording type of the audio sequence, FIG. 6 is a sector format of the audio track, and FIG.
It is an example of a type. 10: Audio input terminal, 12: Time compressor, 24: Magnetic head, 26:
Magnetic disk, 30: Head drive circuit, 32: Disk motor, 50: Video output terminal, 52: Audio output terminal

Claims (1)

(57) [Claims] 1. A method for editing a signal of a recorded area on a recordable recording medium in which an image and additional information of the image are associated with each other, comprising: a recorded area to be edited and a free area of the recording medium. A pre-processing step of setting a recordable area as a recordable area, an editing step, and a processing step of performing processing so that a signal of an unnecessary recorded area remaining in the recorded area to be edited cannot be read with the editing in the editing step. An editing method characterized by comprising: