JPS61255565A - Still picture recording and reproducing device - Google Patents

Abstract

PURPOSE:To simplify the constitution and to attain the recording and reproducing of a still picture without mechanical or electrical switching by recording two fields of data of still picture in one track of a magnetic disc. CONSTITUTION:In one track 2 or another 5 of the magnetic disc 1, a half track of even-number field 3 and of odd-number field 4 are provided, so that two fields of picture data are recorded in one track 2 or 5. The data are reproduced by one magnetic head to correspond to one frame (one scope) of picture. And this is the same with all other tracks. Thus and because one track corresponds with one frame, the constitution of the circuit is made simple. Also, because one head is used, cross talking decreases. In result, the recording and reproducing of the still picture can be executed without mechanical or electrical switching.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a still image recording and reproducing apparatus for recording and reproducing still images.

2. Description of the Related Art A conventional still image recording device is an ESC (electronic still camera). As shown in FIG. 4, one field of image data is recorded on one track on a KEG magnetic disk. A TV image consists of two fields in one frame (
During recording and playback, two magnetic heads 12 and 12' are used to write and read image data.
As shown in the figure, two tracks are completely switched and read by one magnetic head 12 with a total bimorph angle of 3 degrees.

In addition, in FIGS. 4 and 5, 1 is a magnetic disk, 3
is an odd field and 4 is an even field.

Problems to be Solved by the Invention In such a conventional configuration, two magnetic heads 12°12
When using ', there are disadvantages such as high cost, large crosstalk, and the need for signal switching between the magnetic heads 12 and 12'. There were problems such as the need for a mechanism to switch tracks for each field in order to record and reproduce frames.

The entire purpose of the present invention is to provide a device capable of recording and reproducing still images with a simple configuration.

Means for Solving the Problems In order to solve the above problems, the present invention records two fields of image data on one track of a magnetic disk.

Effect of the present invention With the above configuration, one revolution of the magnetic disk is achieved by one rotation of the magnetic disk.
Two fields of image data are recorded or reproduced on the track, corresponding to one frame (one screen) of video.

Embodiment FIG. 1 shows an embodiment of the present invention. A track 2 on a disk 1 is divided into two sectors, and one field of image data is recorded in one sector. FIG. 2 shows a schematic configuration diagram of a still image recording/reproducing apparatus according to an embodiment of the present invention. When recording, pass the subject through the camera 19 and use the CCD
The data converted into electrical signals by the sensor length 18, data of CG (computer graphics) 20, etc. are separated into color signals and luminance signals by the signal processing circuit 17, and then the color difference modulation circuit 16 and the luminance modulation circuit convert the data into color signals and luminance signals. The circuit 16 performs FM modulation, the adder 14 superimposes the signal, the amplifier 13 amplifies it to a recording signal, and the magnetic head 12 records it on the magnetic disk 1. When reproducing, image data recorded on the magnetic disk 1 is read out by the magnetic head 12, the signal is amplified by the amplifier 21, and converted into a color signal and a luminance signal by the color difference demodulation circuit 22 and the luminance demodulation circuit 23, respectively. Demodulated and converted into N by the conversion circuit 24
It is converted into a TSC signal and displayed as a still image on the television receiver 26. FIG. 3 shows an interlaced scan diagram of an NTSCt television image. In the NTSC system used in Japan and the United States, one field consists of 262.6 scanning lines, and one frame (one screen) consists of two fields and 525 scanning lines. The scanning lines of the field are scanned alternately every other line. Also, 30 frames (60 fields) of images are projected per second, and one frame is 1/30 second. In the schematic configuration diagram of Diagram N2, by rotating the motor 11 at 180 rpm (30 rps), one frame (two fields) of data can be recorded on one track (one rotation), and during reproduction, the magnetic head 12 Simply seek to one track and the still image will be displayed on the TV. Also CC1
If it is an IR method, it can be handled by rotating at 15 Q Or p m.

Effects of the Invention As described above, the present invention has an extremely simple configuration, that is, by associating one frame with one track,
The magnetic head has low crosstalk, does not require mechanical or electrical track switching during one frame of video, and has excellent wear resistance between the magnetic head and magnetic disk compared to those with two magnetic heads. The present invention provides a highly reliable still image recording and reproducing device.

[Brief explanation of drawings]

FIG. 1 shows a recording format of an embodiment of the present invention.
FIG. 2 is a schematic configuration diagram of a still image recording and reproducing apparatus according to an embodiment of the present invention, FIG. 3 is an interlaced scan diagram of an NTSC television, and FIGS. 4 and 6 are diagrams of a conventional electronic still camera. FIG. 2 is a diagram showing a recording format of . 1...Magnetic disk, 2,6...Track, 3゜4...Field, 12...
・Magnetic head. Name of agent: Patent attorney Toshio Nakao and 1 other person
6th Hiroj Utsuku Figure 1? , 5 T
Tsuku 3...I high number feel F (h Toku 1. Shoes 4
4.4 scattered fields (/2 track no regrets)

Claims (1)

[Claims] A still image recording and reproducing device for recording and reproducing still images on a disc-shaped recording medium, wherein one track of the disc-shaped recording medium has two
A still image recording and reproducing device characterized by recording still image data of a field.