| 摘要 |
PURPOSE: A method for inserting watermark assistance data in a bitstream, a method of watermarking the bitstream, a device implementing the method of watermarking and the bitstream comprising the watermark assistance data are provided to be resistive to the attack to user data by inserting identification data and coded data to a bitstream. CONSTITUTION: A method for inserting watermark assistance data in a bitstream(F) of coded data comprising the step of: determining, from the bitstream of coded data, identification data identifying coded data to be substituted, at least one substitution data for each coded data to be substituted and a format data defining a manner of substituting coded data to be substituted by the substitution data; identifying, with the identification data, coded data to be substituted; and watermarking the bitstream of coded data by substituting each coded data to be substituted by one substitution coded data on the basis of the format data and of the watermarking data. |
