EP 2023339 B1 20100825 - A low-delay audio coder
Title (en)
A low-delay audio coder
Title (de)
Audiodekoder mit geringer Verzögerung
Title (fr)
Codeur audio à faible retard
Publication
Application
Priority
EP 07113397 A 20070730
Abstract (en)
[origin: EP2023339A1] The present invention relates to methods and devices for encoding and decoding digital audio signals, e.g. a speech signal. An audio coder and a decoder are provided wherein a modeller adds a first distribution model obtained from model parameters of past segments of the digital audio signal and a fixed distribution model, each of the models being multiplied by a weighting coefficient, for obtaining a combined distribution model. The weighting coefficients are selected to minimize a code length of a current segment of the digital audio signal. As the combined distribution model is a sum of several distribution models, wherein at least some of the models is based on the model parameters, flexibility is introduced in the signal model used to encode the digital audio signal. Thus, an audio coder and decoder providing a low bit rate in average, low bit rate variations and low error propagation are provided.
IPC 8 full level
G10L 19/00 (2006.01)
CPC (source: EP)
G10L 19/0017 (2013.01); H04R 25/552 (2013.01); H04R 2225/55 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HU IE IS IT LI LT LU LV MC MT NL PL PT RO SE SI SK TR
DOCDB simple family (publication)
EP 2023339 A1 20090211; EP 2023339 B1 20100825; AT E479182 T1 20100915; DE 602007008717 D1 20101007; WO 2009015944 A1 20090205
DOCDB simple family (application)
EP 07113397 A 20070730; AT 07113397 T 20070730; DE 602007008717 T 20070730; EP 2008057970 W 20080623