JPH1188832A - Optical disk recorder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical disk recorder, capable of outputting a reproduced signal from a magneto optical disk(MO) to a high-resolution display without executing specific processing and recording even an NTSC signal in the MO thereby dealing with a low-resolution display by converting a television signal into a high resolution video signal prior to its recording in the MO. SOLUTION: An NTSC type television signal, i.e., an interlaced and scanned television signal in which 525 scanning lines are included in a frame is converted into a high resolution video signal consisting of 1050 successively scanned lines. Both the high resolution video signal and NTSC signal are recorded in the MO by a magnetic field modulation procedure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical disk recording device, and more particularly to an optical disk recording device for recording, for example, a television signal on an optical disk.

[0002]

2. Description of the Related Art As a conventional optical disk recording apparatus of this type, there is an apparatus which directly records an NTSC television signal.

[0003]

However, digital high-resolution displays have become widespread. To output television signals recorded on an optical disk as described above from the high-resolution display, a high-resolution display must be used. Required special treatment. It is also necessary to support existing low-resolution displays.

[0004] Therefore, a main object of the present invention is to provide an optical disk recording apparatus which can output to both a high resolution display and a low resolution display and does not require special processing on the high resolution display side. is there.

[0005]

SUMMARY OF THE INVENTION The present invention provides a resolution converting means for converting a television signal into a high-resolution video signal.
An optical disc recording apparatus includes a recording unit for recording a television signal and a high-resolution video signal on an optical disc.

[0006]

The television signal of the NTSC system, that is, the television signal which is interlaced and has 525 scanning lines per frame, is converted into 1,050 high-resolution video signals which are sequentially scanned by the resolution conversion circuit. Then, both the low-resolution television signal and the high-resolution video signal are converted, for example, by MO (Magneto O
ptical disc). During reproduction, one of the television signal and the high-resolution signal is reproduced from the MO according to the resolution of the monitor at the output destination.

[0007]

According to the present invention, a television signal is converted into a high-resolution video signal, and both the television signal and the high-resolution signal are recorded on an optical disk. And it is not necessary to perform special processing on the reproduced signal in a high-resolution display.

The above objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Referring to FIG. 1, an optical disk recording apparatus 10 of this embodiment is a television signal (NTSC) of the NTSC system.
SC signal). Input terminal C1
Is converted into a digital signal by an A / D converter 12, and the output from the A / D converter 12 is subjected to resolution conversion by a resolution conversion circuit 14. In other words, the NTSC signal is a signal that is interlaced and has 525 scanning lines per frame, and the resolution conversion circuit 14 sequentially scans based on this signal and has 1050 scanning lines per frame. Generate high resolution signals. Then, the high resolution signal and the NTSC signal output from the A / D converter 12 are supplied to encoders 16a and 16b, respectively. The resolution conversion circuit is disclosed in Japanese Unexamined Patent Application Publication No. 6-62267 [H04N] filed on Mar. 4, 1994.
3/27, G09G 1/04, H04N 3/22
3], Japanese Unexamined Patent Application Publication No.
JP-A-311488 [H04N 7/01] and JP-A-5-191 filed on Jul. 30, 1993
No. 785 [H04N 7/01, H04N 5/2
28] can be applied.

The encoders 16a and 16b convert the input digital signal into a code having 2 to 7 bits of "0" between "1" and "1". The codes output from the encoders 16a and 16b are supplied to a head driving circuit 18 via a switch SW1, and the head driving circuit 18
Recording is performed in a different area of the MO 22 by a so-called magnetic field modulation method using 0. As is well known, in the magnetic field modulation system, a signal is recorded by irradiating the recording surface of the MO 22 with a laser beam by the optical pickup 26 and applying an N or S magnetic field to a region where a light spot is formed. You. A method of recording a plurality of signals in different areas of the same disk is disclosed in Japanese Patent Application No. 8-316962 filed on Nov. 12, 1996.

When reproducing the MO22, the optical pickup 26 gives a weaker laser beam to the MO22 than at the time of recording, and reproduces a signal. When a high-resolution display is connected to the optical disc reproducing apparatus 10, the optical pickup 2
6 reproduces a high-resolution signal code, and when a low-resolution display is connected, the optical pickup 26
Reproduce the SC signal code. An RF signal is output from the optical pickup 26 and amplified by the RF amplifier 34.
The RF signal output from the RF amplifier 34 is
6 to obtain a high-resolution video signal or NTSC signal. When the high resolution signal is reproduced, the switch SW2 is connected to the terminal C3,
The high resolution signal is output to a high resolution display. On the other hand, when the NTSC signal is reproduced, the switch SW2 is connected to the terminal C2, and the NTSC signal is output from the output terminal C2 to the low resolution display. The RF signal is also supplied to the servo control circuit 32, and the servo control circuit 3
2 controls the feed motor 30 based on the RF signal,
Adjust tracking and focus.

According to this embodiment, the NTSC signal is converted into a high-resolution video signal when recording on the MO 22, so that the high-resolution display can output a video without performing any special processing. Further, since the MO22 also records an NTSC signal, it can support both a high-resolution display and a low-resolution display. Although the present embodiment has been described using an NTSC television signal, a composite television signal such as a baseband signal, PAL, or SECAM may be used as the television signal input from the input terminal C1. Also,
Two inputs to the resolution conversion circuit 14 may be provided, and a luminance signal and a chrominance signal may be supplied to each of them. Furthermore, in this embodiment, the description has been made using the MO. However, the optical disc is a rewritable CD (Compact Disc) or DVD.
(Digital Versatile Disc). It goes without saying that the recording method needs to be an optical modulation recording method, a phase change recording method, or the like according to the type of the disk.

[Brief description of the drawings]

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

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 ... Optical disk recording device 14 ... Resolution conversion circuit 16 ... Encoder 26 ... Optical pickup 36 ... Decoder

Claims (2)

[Claims] 1. An optical disc recording apparatus comprising: resolution conversion means for converting a television signal into a high-resolution video signal; and recording means for recording the television signal and the high-resolution video signal on an optical disc. 2. The optical disk recording apparatus according to claim 1, further comprising a reproducing unit that reproduces one of the television signal and the high-resolution signal according to a resolution of a video monitor.