US 6,744,718 B1 · Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor

Abstract

A physical identification data (PID) addressing method using a wobble signal, a wobble address encoding circuit, a method and circuit for detecting the wobble address and a recording medium therefor. Groove tracks are classified into odd groove tracks and even groove tracks. Address information indicating physical identification information is phase modulated using wobble signals having a predetermined phase difference between two adjacent groove tracks, and recorded in each groove track so that address information modulated using the wobble signals having the phase difference of 90° between adjacent two groove tracks can be a quadrature phase shift keying (QPSK) signal. Accordingly, a larger amount of data can be recorded on the recording medium, and since an interval in which a wobble signal disappears is not caused, recovery of a wobble clock signal can be advantageously performed.

Claims58

Dependent claims

A method of addressing physical identification information using wobble signals on an optical recording medium, the method comprising:

phase modulating wobble address information indicating the physical identification information using the wobble signals;
and
recording the phase modulated wobble address information in one of a groove track and a land track, wherein the phase modulated wobble address information is recorded using the wobble signals having a predetermined phase relation so that the phase modulated wobble address information is readable from one of the groove and land track in which the phase modulated wobble address information is not recorded;
wherein the optical recording medium has groove tracks divided into odd and even groove tracks and land tracks between the groove tracks, and the phase relation between the wobble signals is a phase difference between the wobble signals of one of the even groove tracks and an adjacent one of the odd groove tracks of 90 degrees, so that a signal read from one of the land tracks between the one even groove track and the adjacent odd groove track is a quadrature phase shift keying (QPSK) signal.

1 more element

A method of addressing physical identification information using wobble signals on an optical recording medium, the method comprising:

phase modulating wobble address information indicating the physical identification information using the wobble signals;
and
recording the phase modulated wobble address information in one of a groove track and a land track, wherein the phase modulated wobble address information is recorded using the wobble signals having a predetermined phase relation so that the phase modulated wobble address information is readable from one of the groove and land track in which the phase modulated wobble address information is not recorded;
wherein each of the groove track and the land track comprises minimum recording units, the method further comprising recording a sector mark at a beginning of each minimum recording unit in each track;
and
the optical recording medium comprises odd groove and land tracks and even groove and land tracks, wherein the structures of the sector marks are different in the even groove and land tracks as opposed to the odd groove and land tracks, and the structure of a first sector mark of each track is different from the structure of any of the other sector marks in the same track.

3 more elements

A circuit for detecting a wobble address from an optical recording medium, in which wobble address information indicating physical identification information is phase modulated using wobble clock signals having a predetermined phase relation between adjacent even and odd tracks, which are defined by classifying groove tracks or land tracks into odd tracks and even tracks, and recorded in either a groove track or a land track, in an optical recording and reproducing system having an optical detecting device, the circuit comprising:

a wobble clock recoverer which detects a first one of the wobble clock signals using a difference signal (the push-pull signal) between radially half-divided detection signals of the optical detecting device and providing a second one of the wobble clock signals having the predetermined phase relation with the detected first wobble clock signal;
and
a phase demodulator which recovers the address information from the push-pull signal using the first and second wobble clock signals.

Dependencies are inferred from the claim text.

Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor

Life of this patent

Physical identification data addressing method using wobble signal, wobble address encoding circuit, method and circuit for detecting wobble address, and recording medium therefor

Life of this patent

Abstract

Claims58