Method and device for the generation of a scalable data stream and method and device for decoding a scalable data stream

US7454353B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Ralph Sperschneider · Erlangen, DE
• Bodo Teichmann · Ergolding, DE
• Manfred Lutzky · Nuremberg, DE
• Bernhard Grill · Lautenbächle, DE

Key dates

• Filing date: Jan 14, 2002
• Grant date: Nov 18, 2008
• Expiry date: Oct 29, 2024

Classification

• Technology area (CPC G): Physics
• CPC primary: G10L19/24
• WIPO field: Computer technology
• WIPO sector: Electrical engineering

Abstract

In a method of producing a scalable data stream of at least two blocks of output data of a first coder and a block of output data of a second coder, wherein the at least two blocks of output data of the first coder together represent a current section of an input signal in the first coder, and wherein the block of output data of the second coder represents the same current section of the input signal, a determination data block for the current section of the input signal is written. In addition, the block of output data of the second coder, in the direction of transfer from a coding device to a decoding device, is written after the determination data block for the current section of the input signal. In addition, at least one block of output data of the first coder, in the direction of transfer, is written in front of the determination data block of the current section of the input signal, whereupon offset information is written into the scalable data stream indicating that the at least one block of output data of the first coder, in the direction of transfer, is in front of the determination data block. Thus a low-delay transfer and decoding of only the first scaling layer can be …