# US 6,263,155 B1 · Optical disc, recording apparatus, and computer-readable recording medium

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- Number: US 6,263,155 B1
- Document ID: US6263155B1
- Status: Granted
- Kind: B1
- Application number: 09/671,108
- Filed: 2000-09-28
- Granted: 2001-07-17
- Earliest claimed: 1997-09-17
- Assignees: Matsushita Electric Industrial Co., Ltd.
- Inventors: Shinichi Saeki; Kaoru Murase; Tomoyuki Okada; Kazuhiro Tsuga; Tokuo Nakatani
- Web page: https://patentgrep.com/patent/US6263155B1

## CPC

- H04N 9/8042: {involving data reduction}
- G11B 19/022: {Control panels}
- G11B 27/005: {Reproducing at a different information rate from the information rate of recording (for television signals H04N5/783)}
- G11B 27/034: on discs (G11B27/036, G11B27/038 take precedence)
- G11B 27/036: Insert-editing
- G11B 27/105: {of operating discs}
- G11B 27/3027: {used signal is digitally coded}
- G11B 27/329: {on a disc [VTOC]}
- H10B 12/0387: {Making the trench}
- G11B 27/34: Indicating arrangements {(indicating means incorporated in magazine or cassette G11B23/046 and G11B23/0875; indicating measured values in general G01D)}
- G11B 2020/00079: {the compression ratio or quality level being adapted to circumstances, e.g. to the available recording space}
- G11B 2220/216: Rewritable discs
- G11B 2220/2562: DVDs [digital versatile discs]; Digital video discs; MMCDs; HDCDs
- G11B 2220/2575: DVD-RAMs
- H04N 5/775: between a recording apparatus and a television receiver
- H04N 5/85: on discs or drums
- H04N 9/8063: {using time division multiplex of the PCM audio and PCM video signals}
- H04N: PICTORIAL COMMUNICATION, e.g. TELEVISION
- 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)
- H10B: ELECTRONIC MEMORY DEVICES

## Abstract

An optical disc including: a data area storing one or more video objects; and a time map area storing time map information. Each video object includes a plurality of video object units. The time map information includes a first time table and a second time table for each video object. Each first time table includes: addresses of video object units in a corresponding video object; and indicators. The addresses are arranged in order and indicate storage positions of the video object units that correspond to reproduction points that differ by a predetermined time unit. The predetermined time unit is longer than a maximum reproduction period of a video object unit. The indicators specify the video object units which respectively correspond to the addresses. Each second time table includes an entry for each video object unit in the corresponding video object. The entries are arranged in order. Each second time table includes a reproduction period and a data size of each video object unit.

## Claims

### Claim 1

An optical disc comprising:
a data area storing a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible; and
a time map area storing a first table and a second table, wherein
the first table includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time,
the second table includes, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture.

### Claim 2

A recording apparatus comprising:
an input means operable to receive video data to be recorded on an optical disc;
a compression means operable to compress the received video data to generate a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible;
a write means operable to write the compressed video data onto the optical disc; and
a controller operable to control the write means to write the generated video object onto a data area of the optical disc; generate a first table which includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time; generate the second table which includes, for each ofthe plurality of video object units, a reproduction time period and a data size of said video object unit, and a data size of the I-picture included in said video object unit; and control the write means to write the first table and the second table in a time map area of the optical disc.

### Claim 3

A recording method for recording onto an optical disc a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible, the recording method comprising:
writing the video object onto a data area of the optical disc;
generating a first table which includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time;
generating the second table which includes, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit, and a data size of the I-picture included in said video object unit; and
writing the first table and the second table onto a time map area of the optical disc.

### Claim 4

A reproduction apparatus for reproducing a video object stored on an optical disc which further stores a first table and a second table, the video object including a plurality of video object units each of which includes as a first picture an I-picture that is independently reproducible, the first table including, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time, the second table including, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture of said video object units, the reproduction apparatus comprising:
a reading means operable to read the vide object from the optical disc;
a reproduction means operable to reproduce the read video object; and
a controller operable to control the reading means and the reproduction means, wherein the controller receives an instruction to perform a high-speed reproduction ofthe video object in which the video object is reproduced at a predetermined speed higher than that in a normal reproduction,
determines a plurality of reproduction times based on the predetermined speed, controls the reading means to read the first table and the second table, identifies recording addresses of video object units respectively corresponding to the determined reproduction times and data sizes of I-pictures included in the respective identified video object units, and
controls the reading means and the reproduction means to read and reproduce the identified I-pictures to realize the reproduction at the predetermined speed.

### Claim 5

A reproduction method for reproducing a video object stored on an optical disc which further stores a first table and a second table, the video object including a plurality of video object units each of which includes as a first picture an I-picture that is independently reproducible, the first table including, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time, the second table including, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture of said video object units, the reproduction method comprising:
receiving an instruction to perform a high-speed reproduction ofthe video object in which the video object is reproduced at a predetermined speed higher than that in a normal reproduction,
determining a plurality of reproduction times based on the predetermined speed,
controlling the reading means to read the first table and the second table,
identifying recording addresses of video object units respectively corresponding to the determined reproduction times and data sizes of I-pictures included in the respective identified video object units,
controlling the reading means and the reproduction means to read and reproduce the identified I-pictures to realize the reproduction at the predetermined speed.

### Claim 6

A computer-readable recording medium storing a program for use in a recording apparatus for recording onto an optical disc a video object which includes a plurality of video object units, each of the video object units including as a first picture an I-picture that is independently reproducible, the program allowing a computer to execute the steps of:
writing the video object onto a data area of the optical disc;
generating a first table which includes, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time;
generating the second table which includes, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit, and a data size of the I-picture included in said video object unit; and
writing the first table and the second table onto a time map area of the optical disc.

### Claim 7

A computer-readable recording medium storing a program for use in a recording apparatus for reproducing a video object stored on an optical disc which further stores a first table and a second table, the video object including a plurality of video object units each of which includes as a first picture an I-picture that is independently reproducible, the first table including, for each of reproduction times determined at a constant time interval, identification information and an address on the optical disc of a video object unit including a picture to be reproduced at said reproduction time, the second table including, for each of the plurality of video object units, a reproduction time period and a data size of said video object unit and a data size of the I-picture of said video object units, the program allowing a computer to execute the steps of:
receiving an instruction to perform a high-speed reproduction of the video object in which the video object is reproduced at a predetermined speed higher than that in a normal reproduction,
determining a plurality of reproduction times based on the predetermined speed,
controlling the reading means to read the first table and the second table,
identifying recording addresses of video object units respectively corresponding to the determined reproduction times and data sizes of I-pictures included in the respective identified video object units,
controlling the reading means and the reproduction means to read and reproduce the identified I-pictures to realize the reproduction at the predetermined speed.