Authentication of data streams

US8885818B2 · kind B2 · utility

Assignee

• Dolby International AB · IE

Inventors

• Reinhold Boehm · Koblenzer Straße, DE
• Alexander Groeschel · Nuremberg, DE
• Holger Hoerich · Bad Mergentheim, DE
• Daniel Homm · Nuremberg, DE
• Wolfgang A. Schildbach · Nuremberg, DE
• Michael Schug · Erlangen, DE
• Oliver Watzke · Haag in Oberbayern, DE
• Martin Wolters · Wuppertal, DE
• Thomas Ziegler · Nuremberg, DE

Key dates

• Filing date: Aug 6, 2010
• Grant date: Nov 11, 2014
• Expiry date: Jan 29, 2031

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04H2201/50
• WIPO field: Audio-visual technology
• WIPO sector: Electrical engineering

Abstract

The present document relates to techniques for authentication of data streams. Specifically, the present document relates to the insertion of identifiers into a data stream, such as a Dolby Pulse, AAC or HE AAC bitstream, and the authentication and verification of the data stream based on such identifiers. A method and system for encoding a data stream comprising a plurality of data frames is described. The method comprises the step of generating a cryptographic value of a number N of successive data frames and configuration information, wherein the configuration information comprises information for rendering the data stream. The method then inserts the cryptographic value into the data stream subsequent to the N successive data frames.