Digital Video Express, L.p.

Dolby Laboratories Licensing Corporation

Google Inc.

Guillaume Mercier

Siu-Leong Iu

Robert W Schumann

Michael A Bergeron

Jack Ehrhardt

David W Kravitz

David Moshe Goldschlag

Richard Vitkus

Kobad Bugwadia

Richard Whittemore

Hui Luo

Yun-Ting Lin

Malcom Davis

Shiva Ramadoss

An open digital watermark system and methodology having various features for unifying watermark production and processing among diverse user multimedia terminals (), such as set top box, that may be OPIMA compliant. In accordance with specific aspects, intentional image warping is employed to combat pirating, the analog video channel used to download programming, packet signature implemented for watermark insertion by pixel replacement and use of the data stream made to reduce local data processing and storage.

Watermarking system and methodology for digital multimedia content

A content distribution system and method which prevents unauthorized access to secured content such as movies and music. The system includes a source, a receiver, an authorized security device such as a conditional access module (CAM) for decrypting authorized content and an output device for outputting content. The system can also include a backend for managing accounts and system operations. One aspect of this invention is that the content data is derived from the Internet. The system allows for the verification of authorization to play secured content, the addition of watermarks to the secured content, the conversion of the secured content to a displayable form and the means for preventing output of the secured content.

Digital content distribution system and method

Watermark data may be transported by preprocessing one or more elementary data streams. Preprocessing may be achieved by demultiplexing the elementary data stream or by including an extra elementary data stream among the elementary data stream. To insert a watermark in either the elementary data stream or extra elementary data stream, a watermark object may be created by precomputing watermark change data using watermark metadata. Once created, the watermark object may be transported either by packetizing and multiplexing the watermark object into the elementary data stream or overwriting the extra elementary data stream. Afterwards, process takes place. Where packetizing and multiplexing occurs, processing includes demultiplexing the elementary data stream, creating a watermarked elementary data stream and reinserting the watermarked elementary data stream. Where overwriting occurs, processing may include discarding the watermark object upon completing watermarking and may include decoding the watermarked elementary data stream.

Versatile watermark transport system

An apparatus and method for storing and playing high definition content is disclosed. This invention provides a mechanism for storing and playing back high definition content on a medium such as DVD optical disc. One aspect of the invention is that elementary streams may be multiplexed and processed in a high definition media player instead of at authoring time. Another aspect of the invention is that it provides for extended real-time features such as inserting watermarks into the content stream, decrypting selected sections of the content stream, and performing trick playback display modes.

High definition media storage structure and playback mechanism

A content distribution system and method which prevents unauthorized access to secured content such as movies and music. The apparatus includes a source, a receiver, an authorized security device such as a conditional access module (CAM) for decrypting authorized content, an output device for outputting content and a backend for managing accounts and system operations. One aspect of this invention provides a mechanism for providing secured content on a medium such as a DVD optical disc. These devices may verify that there is authorization to play the secured content, add watermarks to the secured content, convert the secured content to a displayable form and provide a means for preventing output of the secured content.

To enable the source of an unauthorized copy of an information-bearing medium, such as a video DVD, to be traced, a compressed digital signal stream to be stored on the medium is altered to include &ldquo;running marks,&rdquo; that comprise pixel blocks changing in position frame by frame and encoded with information designating where and when the copy was made. The medium under test is played back synchronously with a reference medium containing the locations of the running marks together with original video. The source of copying message is advantageously encrypted and scrambled to avoid detection or alteration by a copyist. The message preferably is spread, for example into a spread spectrum carrier, to enhance discrimination among a large number of sources and enable demodulation in the presence of noise.

Growing community of inventors

McLean, VA, United States of America

Guillaume Mercier