Record carrier, playback device and method of recording...

Details Record carrier, playback device and method of recording... Record carrier, playback device and method of recording...

G - Physics

11

B

G11B 7/007 (2006.01) G11B 7/013 (2006.01) G11B 20/18 (2006.01) G11B 27/19 (2006.01) G11B 27/24 (2006.01) G11B 7/004 (2006.01) G11B 20/00 (2006.01) G11B 20/14 (2006.01) G11B 27/30 (2006.01)

Patent

CA 2326174

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 said type of data processing. In respect of a code track that comprises the modulation pattern, the modulation pattern in the left neighbouring track (41, 44) is aligned to the modulation pattern in the right neighbouring track (43, 46). Thereby crosstalk due to the second variations is decreased, and at least two tracks have the same modulation pattern. The playback device has a demodulator and a control unit (56) for retrieving the code from at least two tracks.

La présente invention concerne un support d'enregistrement à pistes sensiblement parallèles, qui présente des premières variations d'un premier paramètre physique et des secondes variations d'un second paramètre physique de la piste. Les premières variations représentent une information enregistrée sur le support d'enregistrement, cette information étant récupérable au moyen d'un type de traitement de données réglable. Un schéma de modulation des secondes variations représente un code permettant le réglage dudit traitement de données. Relativement à une piste code qui contient le schéma de modulation, le schéma de modulation de la piste gauche voisine (41, 44) est aligné avec le schéma de modulation de la piste droite voisine (43, 46). La diaphonie due aux secondes variations est ainsi réduite, et au moins deux pistes possèdent le même schéma de modulation. Le dispositif de lecture comprend un démodulateur et une unité de commande (56) destinés à récupérer le code sur au moins deux pistes.

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