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1. (WO2001003136) ADDITION OF WATERMARK KEYS ACCORDING TO A FLEXIBLE FORMAT

Pub. No.:    WO/2001/003136    International Application No.:    PCT/EP2000/005961
Publication Date: Fri Jan 12 00:59:59 CET 2001 International Filing Date: Wed Jun 28 01:59:59 CEST 2000
IPC: G11B 7/0045
G11B 7/005
G11B 7/007
G11B 19/04
G11B 19/12
G11B 20/00
G11B 20/10
G11B 23/28
H04N 5/913
Applicants: KONINKLIJKE PHILIPS ELECTRONICS N.V.
NUIJTEN, Petrus, A., C., M.
Inventors: NUIJTEN, Petrus, A., C., M.
Title: ADDITION OF WATERMARK KEYS ACCORDING TO A FLEXIBLE FORMAT
Abstract:
A method for embedding supplemental data in an encoded signal that is different from the format used for encoding data of the encoded signal and recording said signal on a disc-like record carrier by applying marks of a first physical type. The supplemental data is encoded in accordance with a second format that is different from the format used for encoding data of the encoded signal. Format description information related to the second format is recorded on the record carrier with either marks of the same physical type but modulated in accordance with a second, different modulation or with marks of a second type having different physical characteristics with respect to the first type.