Method and device for generating a scalable data stream and method and device for decoding a scalable data stream with provision for a bit saving bank function

US7496517B2 · 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: Feb 24, 2009
• Expiry date: May 6, 2024

Classification

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

Abstract

In a method for generating a scalable data stream from one or several blocks of output data of a first encoder and from one or several blocks of output data of a second encoder a determining data block for a current section of an input signal is written. In addition, output data of the second encoder representing a preceding section of the input signal are written in transmission direction from an encoder to a decoder after the determining data block. When the output data of the second encoder are written for a preceding section of the input signal, the output data of the second encoder are written representing the current section of the input signal. In order to signalize where the output data of the second encoder for the preceding section end and where the output data of the second encoder for the current section begin, buffer information is written into the scalable data stream. By the fact that output data of a preceding section follow a determining data block for the current section, a bit savings bank function may be implemented in the scalable encoder and simply be signalized in the bit stream.