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Reduced bit rate ultra low delay audio coding

: Wabnik, S.; Schuller, G.; Hirschfeld, J.; Krämer, U.

Audio Engineering Society -AES-, New York/N.Y.:
120th AES Convention : May 20 - 23, 2006, Paris, France
New York, NY: AES, 2006
pp.1101-1107 (Vol.2)
Audio Engineering Society (Convention) <120, 2006, Paris>
Conference Paper
Fraunhofer IDMT ()

An audio coder with a very low delay (6-8 ms) for reduced bit rates is presented. Previous coder versions were based on backward adaptive coding, which has suboptimal noise shaping capabilities for reduced bit rate coding. We propose to use a different noise shaping method instead, resulting in an approach which uses forward adaptive predictive coding. We will show that, in comparison, the forward adaptive method has the following advantages: it is more robust against high quantization errors, has additional noise shaping capabilities, has a better ability to obtain a constant bit rate, and shows improved error resilience.