Patent · US Active

Audio encoder and decoder

US8484019B2 · kind B2 · utility

15Cited by

12References

9Claims

0Family size

Assignee

Dolby Laboratories Licensing Corporation · US

Inventors

Per Hedelin · Handen, SE
Pontus Carlsson · Bromma, SE
Jonas Samuelsson · Sundbyberg, SE
Michael Schug · Erlangen, DE

Key dates

Filing date	Dec 30, 2008
Grant date	Jul 9, 2013
Priority date	—
Expiry date	Aug 23, 2030

Classification

Technology area (CPC G)Physics
CPC primaryG10L19/035
WIPO fieldComputer technology
WIPO sectorElectrical engineering

Abstract

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.