Process and device for the scalable coding of audio signals

US6115688A · kind A · utility

Assignee

• Max-Planck-Gesellschaft zur Föderung der Wissenschaften e.V. · US

Inventors

• Karlheinz Brandenburg · Erlangen, DE
• Dieter Seitzer · Erlangen, DE
• Bernhard Grill · Lautenbächle, DE

Key dates

• Filing date: Jul 1, 1998
• Grant date: Sep 5, 2000
• Expiry date: Jul 1, 2018

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B1/665
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

In coding of an audio signal, coded signals with low quality and bit rate on the one hand and coded signals with high quality and bit rate on the other hand are transmitted to a decoder. At first, the audio signal is coded with low bit rate and is transmitted to the decoder before an additional coded signal is transmitted to the decoder, which either alone or together with the first coded signal upon decoding thereof provides a decoded signal with high quality within the decoder. In this manner, a low-quality decoded signal is generated first in the decoder before decoding of the high-quality signal is possible.