METHOD FOR INSERTING WATERMARK ASSISTANCE DATA IN A BITSTREAM AND BITSTREAM COMPRISING THE WATERMARK ASSISTANCE DATA

• US 20110129114A1
• Filed: 05/20/2010
• Published: 06/02/2011
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: ContentArmor
• Original Assignee: Thomson Licensing (Vantiva SA)
• Inventors: Marie, Pascal, Colaitis, Marie-Jean
• Granted Patent: US 8,462,982 B2
• Time in Patent Office: Days
• US Class Current: 382/100
• CPC Class Codes: G06T 1/0021 Image watermarking
• CPC Class Codes: H04N 19/46 Embedding additional information in the video signal during the compression process H04N19/517, H04N19/68, H04N19/70 take precedence
• CPC Class Codes: H04N 19/467 characterised by the embedded information being invisible, e.g. watermarking
• CPC Class Codes: H04N 19/48 using compressed domain processing techniques other than decoding, e.g. modification of transform coefficients, variable length coding [VLC] data or run-length data motion estimation in a transform domain H04N19/547; processing of decoded motion vectors H04N19/513
• CPC Class Codes: H04N 19/70 characterised by syntax aspects related to video coding, e.g. related to compression standards

Abstract

The invention relates to a method for inserting watermark assistance data in a bitstream of coded data comprising the step of inserting, in the bitstream, identification data identifying coded data to be substituted and, for each coded data to be substituted, at least one substitution data. The method further comprises a step of inserting in the bitstream a format data defining a manner of substituting the coded data to be substituted by the substitution data.

Claims

1. A method for inserting watermark assistance data in a bitstream of coded data representing a digital content comprising the step of inserting, in said bitstream of coded data, identification data identifying coded data to be substituted and, for each coded data to be substituted, at least one substitution data,

said method further comprising a step of inserting, in said bitstream of coded data, a format data defining a manner of substituting the coded data to be substituted by the substitution data.

2. A method of insertion according to claim 1, wherein said format data specifies the number of substitution data.

3. A method of insertion according to claim 1, wherein said format data specifies the format of said identification data.

4. A method of insertion according to claim 1, wherein said format data specifies check data representative of said coded data.

5. A method of insertion according to claim 4, wherein said check data is a cyclic redundancy check computed from the coded data to be substituted.

6. A method of insertion according to claim 4, wherein said check data is the coded data to be substituted.

7. A method of insertion according to claim 3, wherein said format specifies that said identification data is an absolute address identifying the beginning of the coded data to be substituted.

8. A method of insertion according to claim 3, wherein said bitstream of coded data being encapsulated in transport packets, said format specifies that said identification data comprises a data identifying the transport packet comprising the coded data to be substituted and an offset value relative to the beginning of said transport packet identifying the beginning of the coded data to be substituted.

9. A method of insertion to claim 1, wherein said identification data, said substitution coded data and said format data are inserted in said bitstream of coded data in the form of a supplemental enhancement information message.

10. A bitstream of coded data representing a digital content comprising:

identification data identifying coded data to be substituted; and

at least one substitution data for each coded data to be substituted;

said bitstream of coded data further comprising a format data defining a manner of substituting the coded data to be substituted by the substitution data.