Patent ID: 7398395
Filing Date: 2008-07-08
Classification: G10L,G11B

Abstract:
1. A watermark encoding system comprising: a plurality of watermark systems, each watermark system being configured to provide a different type of watermark, and a watermarking selector that is configured to receive content material and to provide therefrom watermarked content material comprising at least two different types of watermarks, wherein, the watermarking selector is configured to identify a first segment of the content material and apply a first type of watermark in accordance with a first watermark system, and to identify a second segment of the content material and apply a second type of watermark in accordance with a second watermark system, wherein the first and second watermark systems are selected from the plurality of watermarked systems, wherein the watermarking selector is biased in favor of selecting one or more select watermark systems, and wherein a preferred encoder is biased by a random process to ensure that a substantial portion of the content material is encoded using desired watermarking processes so that a number of watermark detectors is reduced in a rendering device and the number is less than a total number of different watermark encoders in an encoding device that provides different watermark types in accordance with the plurality of watermark systems.