JPH06113181A - Video movie - Google Patents

Abstract

PURPOSE:To improve operability, and simultaneously, to attain long-time recording and reproduction by recording a signal on a plate-form recording medium (disk). CONSTITUTION:A video signal inputted by an image pickup part 101 is converted into a digital signal by an A/D converting part 102, and this data is recorded on a rewritable disk 104. Besides, the video signal inputted from the outside too is digitized by the A/D converting part 102, and is recorded on the disk 104. The control of a whole system is executed by a control part 105. At the time of the reproduction, the data read out of the disk 104 is converted into analog data by a D/A converting part 103, and is outputted as the video signal. Besides, when the data is desired to output as the digital data, it is outputted as it is without passing it through the D/A converting part 103. Further, by providing the compressing and expanding means of the digital data, data quantity to be recorded on the recording medium can be reduced so as to promote efficiency.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to improvements in video movies.

[0002]

2. Description of the Related Art An integrated structure of a video camera and a VTR is called a camera-integrated VTR or a video movie. In a conventional video movie, a video signal picked up by an image pickup device such as a CCD is recorded on a magnetic tape as an analog signal.

[0003]

The above-mentioned conventional video movie has the following problems.

Since the data is recorded on the magnetic tape, it is necessary to fast-forward or rewind to the desired position in order to see the desired position at the time of reproduction such as watching and editing, and it is difficult to quickly find the desired position. .

In the case of digital recording, the data amount is large as it is and it is difficult to record for a long time.

Even if the signal is compressed, the recording time on the recording medium is limited, and in order to record for a longer period of time, it is unavoidable to replace the magnetic tape.
At the time of exchange, there will be time that cannot be recorded.

[0007]

In the video movie of the present invention, a plate-shaped recording medium such as a magnetic disk, an optical disk, or a semiconductor memory is used as a recording medium, and means for recording / reproducing a digital signal is used. By providing a means for compressing / expanding, a plurality of recording media can be detachably mounted.

[0008]

Since the plate-shaped recording medium is used, the access time can be shortened. When using a plurality of recording media, when one recording medium is full, recording can be automatically transferred to the next recording medium.

[0009]

1 to 3 are block diagrams of an embodiment in which a disk is used as a plate-shaped recording medium. The disk includes a magnetic disk, an optical disk, a magneto-optical disk, etc., but hereinafter, they are collectively called a disk.

FIG. 1 is a block diagram of the first embodiment.
For example, a video signal input from the image pickup unit 101 including a CCD is converted into a digital signal by the A / D conversion unit 102.
The data is recorded on the rewritable disc 104.
In addition, the video signal input from the outside also receives the A / D conversion unit 102.
Then, it is converted to digital and recorded on the disc 104. The overall control is performed by the control unit 105. Disc 1 during playback
The data read from 04 is converted into analog by the D / A converter 103 and output as a video signal. Alternatively, when it is desired to output as digital data, the D / A conversion unit 1
Output as it is without passing 03.

To record a signal on the disc 104 or reproduce it from the disc 104, a device shown in FIGS. 7A and 7B, which will be described later, is used.

FIG. 2 is a block diagram of the second embodiment.
A video signal generated by the image pickup unit 101 or from the outside is converted into digital data by the A / D conversion unit 102. Further, this data is compressed by the compression unit 203 and written on the disk 104. Disc 104 during playback
The data read from is expanded by the expansion unit 204 and output as it is, or the D / A conversion unit 103 converts it to an analog signal and outputs it.

FIG. 3 is a block diagram of the third embodiment.
Analog data input from the imaging unit 101 or external input is converted into digital data by the A / D conversion unit 102. The data is compressed by the compression unit 203 and then the disk 104
Or 104-1 is recorded. The data called from the disk 104 or the disk 104-1 is expanded by the expansion unit 204, converted into analog by the D / A conversion unit 103, and output as a video signal. Alternatively, when it is desired to output as digital data, it is directly output without passing through the D / A conversion unit 103. The disc 104 and the disc 104-1 can be continuously recorded or reproduced.

4 to 6 are block diagrams of an embodiment in which a semiconductor memory is used as a plate-shaped recording medium.

FIG. 4 is a block diagram of the fourth embodiment.
The video signal input by the image pickup unit 101 is the A / D conversion unit 102.
Is converted into a digital signal by. The data is recorded in the semiconductor memory 504. A video signal input from the outside is also converted into digital by the A / D converter 102 and recorded in the semiconductor memory 504. The overall control is performed by the control unit 105. At the time of reproduction, the data read from the memory 504 is converted into analog by the D / A conversion unit 103 and output as a video signal. Alternatively, when it is desired to output as digital data, it is directly output without passing through the D / A conversion unit 103.

FIG. 5 is a block diagram of the fifth embodiment.
A video signal input from the image pickup unit 101 or from the outside is A
It is converted into digital data by the / D converter 102. Further, this data is compressed by the compression unit 203, and the semiconductor memory 5
Write to 04. At the time of reproduction, the data read from the semiconductor memory 504 is decompressed by the decompression unit 204 and output as it is, or converted into an analog signal by the D / A conversion unit 103 and output.

FIG. 6 is a block diagram of the sixth embodiment.
A video signal input from the image pickup unit 101 or from the outside is A
It is converted into digital data by the / D converter 102. Further, this data is compressed by the compression unit 203, and the semiconductor memory 5
Write to either 04 or 504-1. When the semiconductor memory 504 becomes full during recording, recording is automatically performed in the next semiconductor memory 504-1. During playback,
The data read from one of the semiconductor memories is expanded by the expansion unit 204.
The data is decompressed and output as it is, or the D / A conversion unit 103 converts it to an analog signal and outputs it. The overall control is performed by the control unit 105.

To record a signal on or from a disc, the device shown in FIGS. 7 (a) and 7 (b) is used, for example. FIG. 7A is a side view of the head portion of this device, and FIG. 7B is a plan view thereof. The disk 104 is rotated by the rotating shaft 302. The head 303 can be moved in the radial direction of the disk 104 by a head driving unit 304. Head drive unit 3
The head 303 is moved by 04 to select one track 306 of the data recorded concentrically on the disk 104. Rotation of the disc 104 allows access to the required data in that track.

[0019]

By recording on a plate-shaped recording medium,
When many scenes are recorded, the two-dimensional cueing is performed instead of the one-dimensional fast-forwarding or rewinding like a tape, so that the operation can be performed quickly and the operability is improved. The advantage is great especially in the case of editing work.

By providing the digital data compression / expansion means, the amount of data recorded on the recording medium can be reduced,
The use of the recording medium can be made efficient.

By providing a plurality of recording media, one of the discs can be replaced while the other is being recorded / reproduced, and continuous recording / reproduction for a long time can be supported. Further, it becomes possible to edit by selecting an appropriate portion from one disc and copying it to the other.

When data is recorded in the semiconductor memory,
The mechanical part can be eliminated, and the weight and size can be reduced. Also, power consumption can be reduced.

[Brief description of drawings]

FIG. 1 is a block diagram of a first embodiment of the present invention.

FIG. 2 is a block diagram of a second embodiment of the present invention.

FIG. 3 is a block diagram of a third embodiment of the present invention.

FIG. 4 is a block diagram of a fourth embodiment of the present invention.

FIG. 5 is a block diagram of a fifth embodiment of the present invention.

FIG. 6 is a block diagram of a sixth embodiment of the present invention.

7A and 7B are a side view and a plan view of a head portion of a disk, respectively.

[Explanation of symbols]

 Reference numeral 101 image pickup unit 102 A / D conversion unit 103 D / A conversion unit 104 disk 105 control unit 203 compression unit 204 expansion unit 504 semiconductor memory

Claims (4)

[Claims] 1. A video movie provided with an imaging means, a means for converting a captured video signal into a digital signal, and a means for recording / reproducing the converted digital signal, wherein the recording medium is a magnetic disk, an optical disk, A video movie that is a plate-shaped recording medium such as a semiconductor memory. 2. A means for recording / reproducing a digital signal,
The video movie according to claim 1, further comprising means for compressing / expanding a signal. 3. The video movie according to claim 1, wherein the recording / reproducing means can mount a plurality of recording media. 4. The video movie according to claim 1, wherein the recording medium is detachable from the recording / reproducing means.