JPH01101787A - Still picture recording and reproducing device - Google Patents

Abstract

PURPOSE:To use a picture memory for picture reproduction and edition processing by providing a selection means to switch the memory for picture reproduction and edit processing. CONSTITUTION:A recording means recording a video signal on a magnetic disk 1, a reproducing means reproducing a signal recorded on the magnetic disk, a storage means 29 storing the video signal, the 1st selection means 27 selecting an external video signal supplied externally or a reproduced video signal reproduced by a reproducing means and supplying the result to the storage means 29, and the 2nd selection means 31 selecting either the content stored in the recording means 29 is supplied to the recording means or outputted as the display video signal, are provided. Then the write means writes plural video signals recorded on each track of a disk into the storage means 29 with reduction and the signal written in the memory is recorded on a prescribed track of the disk. The content recorded on the disk is written in the storage means 29 at reproduction and the signal is outputted as the display video signal from the storage means 29.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a still image recording and reproducing device, and more particularly to a still image recording and reproducing device that can edit and search recorded images.

(Background of the Invention) There is a still image recording and reproducing device as a device that records and reproduces information signals such as video signals on a recording medium such as a magnetic disk.

FIG. 5 is a block diagram showing an example of such a still image recording and reproducing apparatus. In the figure, 1 is a disk on which a video signal is recorded, 2 is a head for recording on or reproducing from the disk 1, 3 is a servo motor for rotating the disk 1, and 4 is for positioning the head 2 on a track on the disk 1 to be recorded or reproduced. A head drive mechanism for moving the head 2; 5 records the head 2;
A switch for switching between playback and erasure, 6 a servo motor 3. Head drive mechanism 4. a system controller that provides control signals to the switch 5 and a recording amplifier 25 to be described later;
7 is a reproduction amplifier that amplifies the reproduction signal from the head 2; 8
9 is a Y/C separation circuit that separates the luminance (Y) signal and color (C) signal of the reproduced signal, and 9 is a color difference signal (R-Y) from the modulated C4:5 signal.

10 is a de-emphasis circuit, 11 is a pseudo-frame forming circuit that creates a frame signal from the field signal, and 12 is a color difference signal recorded line-sequentially on disk 1 in a normal state. 13 is a luminance *a circuit that demodulates the modulated Y signal; 14 is a de-emphasis circuit; 15 is a pseudo-frame circuit that creates a frame signal from the field signal; 16
is an encoding circuit that generates a video signal by mixing a color difference signal and a luminance signal. When reproducing a signal recorded on the disc 1, a video signal is extracted from this encoder circuit 16. 17 is the Y signal and C of the video signal supplied from the outside.
A Y/C separation circuit that separates signals, 18 a tecoder that extracts color difference signals (R-Y, B-Y) from the C signal, and 19 an R
20 is an emphasis circuit, 21 is a color modulation circuit that FM modulates the C signal, 22 is an emphasis circuit, and 23 is a luminance circuit that FM modulates the Y signal. A modulation circuit 24 is a mixing circuit that mixes the modulated Y signal and C signal to create a recording signal, 25
is a recording amplifier that amplifies recording signals. Then, the recording signal amplified by the recording amplifier is transferred from the head 2 to the disk 1.
recorded in

Usually, a disc has 50 tracks, and one field of video is recorded on each track, so 50 videos can be recorded. 26 is an erasing circuit that creates an erasing signal when erasing a signal recorded on the disc 1;

The still image recording and reproducing device configured in this manner can record externally supplied image information on a disk, reproduce and retrieve signals recorded on the disk, and can erase or erase the recording on the disk. , it has the feature that it can be performed repeatedly by re-recording.

By the way, such a still image recording and reproducing device is
There was no consideration given to searching for video recorded in .

A still image playback device capable of searching recorded video is described in Japanese Patent Application Laid-Open No. 60-228854. This device reads the video from each track, stores it in an image memory in divided screens, and displays the video recorded in the memory.

Also, I! A still image recording and reproducing device capable of image processing was developed in 1986.
It is described in Japanese Patent No. 0-67386.

This device has multiple memory and different tracks.

This is to mutually rewrite the video signals described in .

(Problems to be Solved by the Invention) The reproducing device described in the above-mentioned Japanese Patent Application Laid-Open No. 60-22885 reproduces all recorded tracks track by track and stores the images in a part of the memory. By repeating the operation of writing in the area, the screen is divided to create a screen that displays multiple images. Therefore, there is a problem in that it takes a lot of time to obtain such a screen.

Further, although the recording and reproducing apparatus described in the above-mentioned Japanese Utility Model Publication No. 62-67386 can perform editing processing, it cannot output the contents recorded in the memory to a monitor television. For this reason, there is a drawback that the disk and head are likely to wear out because the disk is constantly rotating during playback.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to realize a still image recording and reproducing apparatus that can use an image memory for image reproduction and editing processing.

(Means for Solving the Problems) The present invention solves the above problems by providing a recording means for recording video signals on a magnetic disk, a reproducing means for reproducing the signals recorded on the magnetic disk, and a video signal recording means for reproducing the signals recorded on the magnetic disk. a storage means for storing signals; a first selection means for selecting either an external video signal supplied from the outside or a reproduced video signal reproduced by the reproduction means and supplying the selected one to the storage means; The apparatus is characterized by comprising a second selection means for selecting either to supply the content stored in the storage means to the recording means or to output it as a video signal for display.

(Operation) The writing means reduces the plurality of video signals recorded on each track of the disk and writes the reduced image signals into the storage means. The memory records the written signals on predetermined tracks on the disk. During playback, the contents recorded on the disc are written into the storage means and outputted from the storage means as a display video signal.

(Example) Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing one embodiment of the present invention. In the figure, 1 is a disk on which video signals are recorded, 2 is a head that records or plays back on the disk 1, and 3 is a disk 1
4 is a servo motor that rotates head 2 and disk 1.
A head drive mechanism for moving the head 2 onto a track to be recorded or reproduced; 5 a switch for switching the head 2 between recording, reproduction or erasing; 6 a servo motor 3. head drive i
l! l1m structure4. Switch 5 and recording amplifier 2 described later
5 is a system controller that provides a control signal; 7 is a playback amplifier that amplifies the playback signal from the head 2; 8 is a Y that separates the brightness (Y) signal and color (C) signal from the playback signal.
9 is a color demodulation circuit that extracts color difference signals (R-Y, B-Y) from the modulated C signal, 10 is a de-emphasis circuit, and 11 is a pseudo frame generator that creates a frame signal from the field signal. circuit, 12 is disk 1
13 is a luminance 111 circuit that demodulates the modulated Y signal, 14 is a de-emphasis circuit, and 15 is a circuit that converts the frame signal from the field signal. The pseudo frame circuit 16 to be created is an encoding circuit that mixes a color difference signal and a luminance signal to generate a video signal. When reproducing a signal recorded on the disc 1, a video signal is taken out from this encoding circuit 16. 17 is a Y/C separation circuit that separates the Y signal and C signal of the video signal supplied from the outside;
19 is a line sequential circuit that outputs the RY signal and BY signal line sequentially, 20 is an emphasis circuit, and 21 is a C signal FM. a color modulation circuit that modulates, 22 an emphasis circuit;
23 is a brightness modulation circuit that performs FM modulation on the Y signal, 24 is a mixing circuit that mixes the modulated Y signal and C signal to create a recording signal, and 25 is a recording amplifier that amplifies the recording signal.

Then, the recording signal amplified by the recording amplifier is recorded from the head 2 onto the disk 1. Usually, a disc has 50 tracks, and one field of video is recorded on each track, so 50 videos can be recorded. 26 is an erasing circuit that creates an erasing signal when erasing a signal recorded on the disc 1; 26 is a switch for switching the input to the memory between external video and the playback signal from disk 1;
8 is an A/D converter that converts the video signal selected by switch 27 into a digital signal, 29 is a frame memory that stores the video signal digitally converted by A/D converter 28, and 30 is two frame memories. A D/A converter 31 that converts the stored digital video signal into analog is a switch that switches whether the stored video signal is recorded on the disc 1 or supplied to an external device as a video output. Here, switches 27 and 31 . The memory 29 is controlled by control signals from the system controller 6.

The operation of this device will be explained below. During recording, the system controller 6 rotates the disk 1 using the servo motor 3, and moves the head 2 onto the track to be recorded using the head drive mechanism 4.

Also, switch 5. Switch 27. Each switch 31 is switched to the a side. An external video signal is converted into a digital signal by an A/D converter 28 and supplied to a memory 29. At this time, a write signal is given from the system controller 6 to the two memories, and the memory 29 reads and stores one frame of the digitally converted video signal. When reading into the two memories is completed and the disk 1 is rotating at a predetermined rotation speed, the system controller 6 gives a read signal to the memory 29. As a result, the digital signal is read from the memory 29, converted into an analog video signal by the D/A converter 30, and supplied to the Y/C separation circuit 17.

This video signal is separated into a Y signal and a C signal by a Y/C separation circuit. The C signal is converted into color difference signals (R/Y, B
-Y), and further converted into line-sequential color difference signals in which R/Y and B-Y are alternated for each scanning line in a line sequential circuit 19. After this line-sequential color difference signal is subjected to pre-emphasis, it is FM-modulated by a color modulation circuit 21 and supplied to a mixing circuit 24. On the other hand, the Y signal separated by the Y/C separation circuit 17 is pre-emphasized, then FM modulated by the brightness modulation circuit 23 and supplied to the mixing circuit 24. The FM-modulated luminance signal and color signal are mixed in a mixing circuit 24 and then amplified in a recording amplifier 25 to become a recording signal. This recording signal is recorded on a predetermined track of the disk 1 by the head 2 . This type of disc has 50 concentric tracks.
It has a regular configuration, and one screen of video can be recorded on one track.

During playback, the system controller 6 controls the servo motor 3.
The disk 1 is rotated, and the head drive mechanism 4 moves the head 2 onto the track to be reproduced. Also, switch 5. Switch 27° and switch 31 to the b side. The signal recorded on the disc 1 is detected by the head 2, amplified by the reproduction amplifier 7, and then supplied to the Y/C separation circuit 8. The C signal separated by the Y/C separation circuit is demodulated by a color demodulation circuit 9 to extract a color difference signal, which is then de-emphasized and supplied to a pseudo frame generation circuit 11.

The field-recorded color difference signal is framed by the pseudo-frame forming circuit 11, and furthermore, the line-sequential color difference signal is returned to a normal color difference signal by the reverse line sequential circuit 12, and is supplied to the encoding circuit 16. Ru. On the other hand, Y/
The C-separated Y signal is demodulated by a luminance demodulation circuit 13 and then de-emphasized and supplied to a pseudo frame formation circuit 15. The field-recorded luminance signal is framed by the pseudo-framing circuit 11 and supplied to the encoding circuit 16. The color difference signal and the luminance signal are converted into a video signal such as an NTSG signal by an encoding circuit 16 and output.

In this way, when the video recorded on one track from disk 1 is played back, the system controller 6
Give a write signal to 9. For this reason, the encoding circuit 1
The video signal from 6 is converted into digital data by an A/D converter 28 and recorded in a memory 29. Then, the system controller 6 stops the servo motor 3 and also gives a read signal to the memory 29. Therefore, the memory 29 enters the read mode, converts the stored video into an analog video signal using a D/A converter, and outputs the video. In this way, since the video recorded on the disc 1 is once stored in the memory and then played back, there is no need to keep the disc 1 rotating while the same video is being played back. This prevents head and disk wear.

The disk 1 can record 50 frames of video using a normal still image recording and reproducing device. Here, when 48 frames have been recorded, the system controller 6 switches the switch 5. Switch 27. The switches 31 are switched to A, B, and A, respectively, to instruct the servo motor 3 and head drive mechanism 4 to reproduce from the 1st track to the 25th track. In addition, the system controller 6 divides each reproduced video into 115 pixels vertically and horizontally.
An instruction is given to the memory 29 to store a plurality of images by dividing the screen area of the memory 29 into 5 vertically x 5 horizontally. 1 to 25 recorded on disk 1
The system controller 6 switches the switch 5 to "a" and directs the head moving mechanism and recording amplifier to record the contents of the memory 29 on the 49th track. give instructions.

Thereafter, the system controller 6 switches the switch 5 to b and instructs each section to reproduce the 26th to 48th tracks. Also, the system controller 6 compresses each reproduced video to 115 pixels in the vertical and horizontal directions, and the screen area of the memory 29 is reduced to t1.
Give instructions to two memories to divide the screen into 5 x 15 pixels and store it. After the images of the 26th to 48th tracks recorded on the disk 1 are divided into screens and stored in the memory 29, the system controller 6 switches the switch 5 to a to transfer the contents of the memory 29 to the disk 1. An instruction is given to the head moving mechanism and recording amplifier to record on the 50th track. In this way, the 49th track contains the videos recorded on the 1st to 25th tracks.
The images recorded on the 26th to 48th tracks are recorded as index screens on the tracks. This situation is shown in the second
As shown in the figure. In the figure, (a) is the video recorded on the first track, (b) is the video recorded on the second track, (
D) is the video recorded on the 49th track, (E) is the video recorded on the 5th track.
This is a video recorded on track 0. Furthermore, (d) and (
The contents of each image reduced in (e) are omitted.

By reproducing the videos shown in (d) and (e), it is possible to instantly search for a desired video from a plurality of screens recorded on the disc.

FIG. 3 is a diagram showing another embodiment of the present invention.

In the figure, the same parts as in FIG. 1 are given the same numbers and their explanations will be omitted. The difference from FIG. 1 is that a first memory 29a and a second memory 29b are provided as memories, and switches 32 and 33 are provided to select these two memories.

With such a configuration, in addition to performing operations similar to those of the above embodiment, editing processing can be performed. FIG. 4 is a flowchart showing the operation of the apparatus shown in FIG. 3 when performing editing processing.

The operation during editing processing of this embodiment will be described below with reference to FIGS. 3 and 4. The system controller 6 has switches 5, 27, 31, 32 and 33, respectively, b
, b, a, a side (step (2)), the head 2 is moved to the nth track of the disk for reproduction (step (2)), and this playback output is stored in the first memory (step (2)). and,
Switch the switch 5 to the C side (Step ■) to erase the nth track (Step ■). Next, switch the switches 5, 32 and 33 to the A, B, and B sides, respectively (Step ■), and turn the head 2 on. The track is moved to the m-th track and reproduced (Step (2)), and this reproduction output is stored in the second memory (Step (2)). Then, switch 5 is switched to the C side (step 2), and the m-th track is erased (step O).

After this, switch 5, 31 and 33 are set to a.

a, switch to the a side (step ■), and record the contents of the first memory on the m-th track of the disk 1 (step), and switch the switch 33 to the b side (step ■), and move the head 2 to the n-th track. , and record the contents of the second memory on the disk (step ①). By doing this, the video recorded on the first track and the video recorded on the n-th track can be replaced.

(Effects of the Invention) As described in detail above, according to the present invention, since the present invention includes a selection means for switching the memory for image reproduction and editing processing, multiple images recorded on a disk can be instantly changed. It is possible to realize a still image recording and reproducing device that can confirm images and use the memory for image reproduction and editing processing.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing a configuration example of an embodiment of the present invention,
FIG. 2 is an explanatory diagram showing the contents of images recorded on a disk used in the still image recording and reproducing apparatus of the present invention, FIG. 3 is a block diagram showing a configuration example of another embodiment of the present invention, and FIG. The figure is a flowchart explaining the image editing process of the still image recording and reproducing apparatus of the present invention, and FIG. 5 is a block diagram showing a conventional example. 1...Disk 2...Head 6...System controller

Claims (3)

[Claims] (1) Recording means for recording video signals on a magnetic disk, playback means for playing back signals recorded on the magnetic disk, storage means for storing video signals, and external video signals supplied from the outside. or a first selection means for selecting one of the reproduced video signals reproduced by the reproduction means and supplying it to the storage means; and a first selection means for supplying the content stored in the storage means to the recording means or for display. 1. A still image recording and reproducing apparatus comprising: second selection means for selecting either one of outputting as a video signal. (2) The storage means is configured to reduce the reproduced video from the playback means and store a plurality of videos all at once as one screen, and the recording means has a memory in which the plurality of videos are reduced and stored. 2. The still image recording and reproducing apparatus according to claim 1, wherein the still image recording and reproducing apparatus is configured to record contents on a magnetic disk. (3) The storage means is configured to have a capacity capable of storing a plurality of screens, and any two video signals among the plurality of video signals recorded on the magnetic disk are interchanged. A still image recording and reproducing device according to claim 1.