US 6,549,495 B1 · Record carrier, playback device and method of recording information

Abstract

A record carrier has substantially parallel tracks, which exhibit first variations of a first physical parameter and second variations of a second physical parameter of the track. The first variations represent information recorded on the record carrier, which information is recoverable by means of a controllable type of data processing. A modulation pattern of the second variations represents a code for controlling the type of data processing. With respect to a code track that includes the modulation pattern, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track. Thereby crosstalk due to the second variations in decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator and a control unit for retrieving the code from at least two tracks.

Claims17

Dependent claims

A record carrier comprising:

a substrate;
and
substantially parallel tracks on the substrate and exhibiting:
first variations of a first physical parameter of the track, the first variations representing information recorded on the record carrier, which information is recoverable by means of a controllable type of data processing;
and
second variations of a second physical parameter of the track, a modulation pattern of the second variations representing a code for controlling the type of data processing, a code track that has the modulation pattern has a left neighboring track and a right neighboring track, each track having a respective physical parameter, the modulation pattern in the left neighboring track is aligned with the modulation pattern in the right neighboring track and the alignment between the modulation of the right and left neighboring tracks substantially reduces the crosstalk between the code track and the neighboring tracks.

3 more elements

A method comprising the steps of:

providing a record carrier with substantially parallel tracks;
encoding in first variations of a first physical parameter of the track information that is recoverable using a controllable type of data processing;
and
encoding in a modulation pattern of second variations of a second physical parameter of the track, a code for controlling the type of data processing, a code track that has the modulation pattern has a left and right neighboring tracks, each track having a respective second physical parameter, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track, and the alignment between the modulations of the left and right neighboring tracks substantially reduces crosstalk between the code track and the neighboring tracks.

1 more element

A recording device for recording information on a record carrier, comprising:

encoding in first variations of a first physical parameter of a track on the record carrier, information that is recoverable using a controllable type of data processing;
and
encoding in a modulation pattern of second variations of a second physical parameter of the track, a code for controlling the type of data processing, a code track that has the modulation pattern has a left and right neighboring tracks, each track having a respective second physical parameter, the modulation pattern in the left neighboring track is aligned to the modulation pattern in the right neighboring track, and the alignment between the modulations of the left and right neighboring tracks substantially reduces crosstalk between the code track and the neighboring tracks when the code is read out.

Dependencies are inferred from the claim text.

Record carrier, playback device and method of recording information

Life of this patent

Record carrier, playback device and method of recording information

Life of this patent

Abstract

Claims17