Audio encoder and decoder

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United States of America Patent

PATENT NO 8924201
SERIAL NO

13901960

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Abstract

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The present invention teaches a new audio coding system that can code both general audio and speech signals well at low bit rates. A proposed audio coding system comprises linear prediction unit for filtering an input signal based on an adaptive filter; a transformation unit for transforming a frame of the filtered input signal into a transform domain; and a quantization unit for quantizing the transform domain signal. The quantization unit decides, based on input signal characteristics, to encode the transform domain signal with a model-based quantizer or a non-model-based quantizer. Preferably, the decision is based on the frame size applied by the transformation unit.

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Patent Owner(s)

  • DOLBY INTERNATIONAL AB

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Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Carlsson, Pontus Bromma, SE 54 714
Hedelin, Per Göteborg, SE 34 475
Samuelsson, Leif Jonas Sundbyberg, SE 48 292
Schug, Michael Erlangen, DE 46 702

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