JP2812305B2 - Optical disk drive - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk drive, and more particularly to an optical disk drive suitable for use in editing.

[0002]

2. Description of the Related Art Conventionally, as this type of optical disk device,
Japanese Patent Application Laid-Open No. 5-314492 is known. In the publication, after-recording or pre-recording of only audio or video necessary for program editing is enabled by separating an audio signal and a video signal.

In the optical disk device disclosed in Japanese Patent Laid-Open No. Hei 5-144183, by writing information of an odd field or an even field into a sector,
The odd field and the even field are prevented from overlapping at the joint of editing so that the image quality does not deteriorate.

[0004]

The above-mentioned conventional optical disk device has the following problems. In the former case, since the format of the signal to be recorded is changed, it cannot be said to be versatile after-recording or pre-recording.

In the latter case, the basic
This is to prevent image quality deterioration,
It is not possible to perform after-image only recording
Absent.

[0006] The present invention has been made in view of the above problems.
And insert edit of audio only or video only
It is an object of the present invention to provide an optical disk device that can perform the operation.

[0007]

[Means for Solving the Problems]To achieve the above purpose
Therefore, according to the present invention, the two reproducing heads are sequentially placed on a predetermined track.
A playback mechanism for continuous signal playback by allowing access,
Continuously switch the video signal from each playback head one after another
Video signal switching means for outputting a video signal to the
Audio signals from the
Signal switching means for outputting a signal, and the first sound
The audio signal output from the signal switching means is input and temporarily recorded.
From the first audio signal switching means.
Audio signal input and audio output from the audio memory
Second audio signal switching means for switching between the audio signal and the audio signal;
Storage and reproduction in the memory and the video signal switching means and
The first audio signal switching means and the second audio signal switching means are controlled.
The video signal and the audio signal on the optical disc
Control means to output
You.

[0008] According to comprising such configuration invention, firstly,
Sequentially to access the specified track two reproducing heads in reproducing mechanism continuously to regenerate the signal, by thus switching one after the audio signal from the reproducing head in the first audio signal switching means, sequentially speech Output a signal.
Then, the audio signal output from the first audio signal switching means is input to an audio memory and temporarily stored. Then, again, playback mechanism therefore is sequentially accessed in a predetermined track two reproducing heads continuously to signal reproduction, by switching sequentially the video signal from the reproduction head at the video-signal switching unit, continuous Output the video signal, and sequentially switch the audio signal from each reproducing head by the first audio signal switching means to continuously output the audio signal. During this reproduction, by switching the audio signal output from the audio signal and the audio memory to be outputted from the second audio signal switching unit <br/> the result first audio signal switching means, video signals and audio on an optical disk Can be output in combination with signals. The above control is performed by the control means.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a schematic block diagram showing an optical disk device according to an embodiment of the present invention. In FIG. 1, two heads 10 and 10 can access a predetermined track of an optical disk via a drive mechanism (not shown), and can read information recorded on the optical disk. Each of the heads 10, 10 is connected to a signal processing unit 20, 20, which processes a reproduction signal picked up from each of the heads 10, 10 and outputs a video signal and an audio signal.

In this embodiment, as shown in FIG. 2, one set of video and audio is recorded in one track by dividing the area, and each head 10 has one track when the optical disk rotates. Play the video and audio in the inside. Therefore, when one track is reproduced, the next track is reproduced, and in order to continue reproduction without interruption, before one head 10 finishes reproducing a certain track, the other reproduction track is used for the other head. 10 must be waiting. This is repeated alternately to continuously reproduce.

[0011] Of course, in order to output the reproduced signal to the outside, it is necessary for selecting and outputting alternately switched video signals output from the signal processing unit 20, 20 and an audio signal A video signal switch 30 for outputting and a first audio signal switch 40 are provided. The control unit 50 also accesses the heads 10, 10 and controls the video signal switch 30 and the first audio signal switch 40.
Is controlled by

In the present embodiment, these constitute an optical disk reproducing means. In the present embodiment, two heads 10 are used, but a larger number of heads 10 may be used. However, using two heads for continuous reproduction without breaks saves resources and enables efficient operation.

When the two heads 10 and 10 are used as described above, if there is a material A and a material B each consisting of a set of a combination of video and audio recorded on each track, these are successively transferred. Upon reproduction, as shown in FIG. 3, video A → video B audio A → audio B are connected. However, it is assumed that a video C is to be inserted between the video A and the video B by after recording. Audio C for video C
In addition, since the data is recorded on another track, if the two heads 10 and 10 normally reproduce continuously, the video and the audio are switched as a set, as shown in FIG. Then, the voice C is naturally interrupted.

[0014] In contrast, in the present embodiment, with which an audio memory 60 connected to the output of the first audio signal switching device 40, audio output and the first audio signal from the audio memory 60 A second audio signal switch 70 for switching between audio output from the switch 40 and
As will be described later, after-recording of only audio or only video is possible.

[0015] In this case, constitute the speech memory 60 is a temporary storage means, the second audio signal switching device 70 constitutes a switching means, the control unit 50 for controlling these constitute the switching control means. Generally, the video information requires an absolutely larger capacity than the audio information, so the audio information is temporarily stored in the audio memory 60. However, if the storage capacity is sufficient, the video information is temporarily stored. You may do it.
Further, the switching is not limited to the absolute alternative, and the mixing may be performed by changing the ratio.

[0016] Next, the operation of this embodiment having the above structure. After editing the continuous material A and material B, if only the video of material C is to be inserted,
First, the IN point and the OUT point of the image C are determined. Then, a part of the sound A and a part of the sound B are recorded in the sound memory 60 corresponding to the part where the image C is inserted. This recording is performed by inputting the audio output from the first audio signal switch 40 to the audio memory 60 while continuously reproducing the material A and the material B.

[0017] Next, in order to insert editing, continuously played in two of the head 10, 10 in the order of material A → C → material material B. At the time of such reproduction, the video signal switch 30 and the first audio signal switch 40 are connected to the sequential signal processor 2 as usual.
The outputs 0 and 20 are switched. However, the second audio signal switch 70 selects the output of the second audio signal switch 70 instead of the first audio signal switch 40 from the set IN point to the OUT point. Therefore, as shown in FIG. 5, the output video signal and the audio signal output the material C for the video while the material A and the material B are output for the audio, and the insert editing of only the video is realized. .

In this way, it becomes possible to perform insert editing of a video only (a type of editing in which a new material C is added after cut editing of the material A and the material B), which was not possible in the past. Was. On the other hand, on the other hand, after-recording of only audio is also possible. For example,
Conversely to the above, it is assumed that the sound C is inserted and edited between the sound A and the sound B. In this case, first, the two heads 10 and 10 successively reproduce the material A, the material C, and the material B in this order, and store the sound output from the first sound signal switch 40 in the sound memory 60 at this time. And then,
The material A is continuously reproduced in the order of material B, but the audio output from the second audio signal switch 70 is selected for the audio, while the video is not changed. Then, the material C is inserted and edited only for the audio.
As a result, similar insert editing can be realized without storing a large amount of video.

[0019] The material A in this way, pre-voice memory 60
The sound A and the sound B of the sound C and the sound B are recorded, and the sound C is output in parallel with the sound C when the sound C is reproduced. By outputting the audio output of the audio memory 60, the insert editing of only the video can be performed. The material A, the material C, and the material B can be reproduced in advance, and the sound A, the sound B, and the sound C can be reproduced. If the audio output from the audio memory 60 is selected when the material A and the material B are reproduced in addition to the recording in the memory 60, the insert editing of only the audio can be performed.

[0020]

As described above, according to the present invention, it is possible to provide an optical disk apparatus capable of overwriting only video or audio without changing the format. In addition, since the audio information is stored in the temporary storage memory, the storage area is smaller than that of the video. further,
Since only a minimum of two playheads are used,
The configuration can be simplified.

[0021] Furthermore, the switching unit content can be realized with fewer resources of three.

[Brief description of the drawings]

FIG. 1 is a schematic block diagram of an optical disk device according to an embodiment of the present invention.

FIG. 2 is a diagram showing an information recording position in a track in the optical disc device.

FIG. 3 is a diagram showing an output video, audio, and a video to be edited.

FIG. 4 is a diagram showing video and audio output when edited by a conventional method.

FIG. 5 is a diagram showing video and audio output by insert editing of video only.

FIG. 6 is a diagram showing video and audio output by insert editing of only audio.

[Explanation of symbols]

 Reference Signs List 10 head 20 signal processing unit 30 video signal switching unit 40 first audio signal switching unit 50 control unit 60 audio memory 70 second audio signal switching unit

Claims (1)

(57) [Claims] 1. A reproducing mechanism for successively reproducing signals by causing two reproducing heads to sequentially access a predetermined track, and a video signal switching for continuously outputting video signals by sequentially switching video signals from the respective reproducing heads. Means, first audio signal switching means for successively outputting audio signals by sequentially switching audio signals from each reproducing head, and inputting and temporarily storing the audio signals output from the first audio signal switching means. An audio memory to be switched on; a second audio signal switching means for switching between an audio signal output from the first audio signal switching means and an audio signal output from the audio memory; storage and reproduction in the audio memory and the video A control means for controlling the signal switching means, the first audio signal switching means and the second audio signal switching means to output a combined video signal and audio signal on the optical disc; Optical disk apparatus characterized by comprising a means.