# US 6,295,270 B1 · Optical record carrier with grooves having wobbles with phases depending on position information pits at predetermined positions

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- Number: US 6,295,270 B1
- Document ID: US6295270B1
- Status: Granted
- Kind: B1
- Application number: 09/268,255
- Filed: 1999-03-15
- Granted: 2001-09-25
- Earliest claimed: 1998-03-16
- Assignees: U.S. Philips Corporation
- Inventors: Gijsbert J. Van Den Enden; Johannes H. M. Spruit; Johannes J. L. M. Van Vlerken; Ronald R. Drenten
- Web page: https://patentgrep.com/patent/US6295270B1

## CPC

- G11B 7/00745: {Sectoring or header formats within a track (formats in general G11B20/12)}
- G11B 7/005: Reproducing (G11B7/0065 takes precedence)
- G11B 7/007: Arrangement of the information on the record carrier, e.g. form of tracks {, actual track shape, e.g. wobbled, or cross-section, e.g. v-shaped; Sequential information structures, e.g. sectoring or header formats within a track}
- G11B 7/013: for discrete information, i.e. where each information unit is stored in a distinct discrete location {, e.g. digital information formats within a data block or sector}
- G11B 7/24082: Meandering
- 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)

## Abstract

An optical disk has tracks with a groove wobbled in a radial direction and addressing information at predetermined positions along the track. Embossed pits at the predetermined positions represent addressing information. The phase of the wobble near the predetermined positions depends on whether a pit is present on a predetermined position or not.

## Claims

### Claim 1

An optical record carrier comprising:
a substrate;
a recording layer having substantially parallel tracks for recording information in a pattern of optically detectable marks;
wobbled grooves along the tracks;
pits for storing position information at predetermined positions along the tracks, the wobble being discontinuous so that the phase of the wobble at the predetermined positions depends on the presence of a pit at such a predetermined position.

### Claim 2

An optical record carrier, comprising:
a substrate;
a recording layer having substantially parallel tracks for recording information in a pattern of optically detectable marks;
wobbled grooves along the tracks;
pits for storing position information at predetermined positions along the tracks, the phase of the wobble at the predetermined positions depends on the presence of a pit at such a predetermined position;
and wherein the wobble has a minimum value at a predetermined position with pit and a maximum value at a predetermined position without pit.

### Claim 3 (depends on 1)

The record carrier of claim 1, wherein the predetermined positions are grouped in series and the wobble in between the series of predetermined positions in the track direction represents information.

### Claim 4 (depends on 3)

The record carrier of claim 3, wherein the position information in the wobble is encoded by phase-shift keying.

### Claim 5 (depends on 1)

The record carrier of claim 1, wherein the predetermined positions are arranged between neighboring grooves.

### Claim 6 (depends on 5)

The record carrier of claim 5, wherein the phase of the wobble of only one of the neighboring grooves depends on the presence of a pit at a predetermined position.

### Claim 7

An optical record carrier, comprising:
a substrate;
a recording layer having substantially parallel tracks for recording information in a pattern of optically detectable marks;
wobbled grooves along the tracks;
pits for storing position information at predetermined positions along the tracks, the phase of the wobble at the predetermined positions depends on the presence of a pit at such a predetermined position;
and wherein the phases of both neighboring grooves depend on the presence of a pit at a predetermined position and the wobble of both neighboring grooves is in anti-phase.

### Claim 8 (depends on 1)

The record carrier of claim 1, wherein the predetermined positions are grouped in doublets of two neighboring predetermined positions, and one pit is present in each doublet.

### Claim 9 (depends on 1)

The record carrier of claim 1, wherein land portions are arranged between neighboring grooves, and land portions are alternatingly provided with pits and without pits.