# US 5,351,132 A · Method of recording and reproducing information on a video disk utilizing table of contents data

> Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt

- Number: US 5,351,132 A
- Document ID: US5351132A
- Status: Granted
- Kind: A
- Application number: 07/942,745
- Filed: 1992-09-09
- Granted: 1994-09-27
- Earliest claimed: 1991-09-09
- Assignees: Pioneer Electronic Corporation
- Inventors: Takao Sawabe; Ryuichi Todoroki; Takashi Sakakibara
- Web page: https://patentgrep.com/patent/US5351132A

## CPC

- G11B 27/3027: {used signal is digitally coded}
- G11B 19/12: by sensing distinguishing features of {or on} records, e.g. diameter {end mark}
- G11B 27/034: on discs (G11B27/036, G11B27/038 take precedence)
- G11B 27/105: {of operating discs}
- G11B 27/309: {Table of contents}
- G11B 27/329: {on a disc [VTOC]}
- H04N 9/8233: {the additional signal being a character code signal}
- G11B 2220/20: Disc-shaped record carriers
- G11B 2220/2587: Laser Discs; Optical disc using analog recording
- H04N 9/797: for recording the signal in a plurality of channels, the bandwidth of each channel being less than the bandwidth of the signal (H04N9/804, H04N9/81, H04N9/82 take precedence)
- G11B: INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER (recording measured values in a way that does not require playback through a transducer G01D9/00; recording or playback apparatus using mechanically marked tape, e.g. punched paper tape, or using unit records, e.g. punched or magnetically marked cards G06K; transferring data from one type of record carrier to another G06K1/18; circuits for coupling output of reproducer to radio receiver H04B1/20; gramophone pick-ups or like acoustic electromechanical transducers or circuits therefor H04R)
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION

## Abstract

A method of recording information on a video disk, includes the steps of: recording a video signal on the video disk; and recording table-of-contents data to control reproduction of the recorded video signal, on a plurality of frames in a lead-in area of the video disk. The table-of-contents data has a data structure, which is completed in each of the plurality of frames and is repeatedly identical in each of the plurality of frames adjacent to each other.

## Claims

### Claim 1

A method of recording and reproducing information on a video disk having a program area and a lead-in area, in which a plurality of frames are arranged in a circular direction, comprising the steps of:
recording a video signal on the program area of the video disk;
recording table-of-contents data, to control reproduction of the recorded video signal, on each of the plurality of frames in the lead-in area of the video disk, said table-of-contents data including at least chapter number information and frame number information for all chapter numbers and frame numbers of the recorded video signal in the program area and having a data structure which is completed in each of said plurality of frames in the lead-in area and the table-of-contents data is identically repeated in each of said plurality of frames adjacent to each other;
reading the table-of-contents data from one of the plurality of frames and storing the read table-of-contents data before reproducing the video signal; and
performing chapter number search and frame number search on the basis of the stored table-of-contents data, to reproduce the video signal from the program area.

### Claim 2 (depends on 1)

A method as claimed in claim 1, wherein said video signal comprises a MUSE (Multiple Sub-Nyquist Sampling Encoding) signal, and said table-of-contents data is recorded in a video signal area of said MUSE signal.

### Claim 3 (depends on 2)

A method as claimed in claim 2, wherein said table-of-contents data recording step comprises the step of recording the identical table-of-contents data repeatedly at predetermined intervals.

### Claim 4 (depends on 2)

A method as claimed in claim 2, wherein said table-of-contents data has a block structure completed in each of said frames.

### Claim 5 (depends on 1)

A method as claimed in claim 1, further comprises the step of recording a control code on an undefined area of the video disk in a MUSE (Multiple Sub-Nyquist Sampling Encoding) system.

### Claim 6 (depends on 5)

A method as claimed in claim 5, wherein said undefined area of the video disk comprises a free line having a line number 564 in the MUSE signal.

### Claim 7 (depends on 5)

A method as claimed in claim 5, wherein said control code comprises an identification code showing whether or not the table-of-contents data is recorded.

### Claim 8 (depends on 1)

A method as claimed in claim 1, wherein said identical table-of-contents data is repeatedly recorded on more than thirty frames in said lead-in area.

### Claim 9 (depends on 1)

A method as claimed in claim 1, wherein said video disk has front and back sides each having the program area, and, in the table-of-contents data recording step, the table-of-contents data for both the front and back sides is recorded, to permit direct access to the video signal recorded on the front and back sides.