EP 2346031 B1 20150930 - Rate-distortion optimization for advanced audio coding
Title (en)
Rate-distortion optimization for advanced audio coding
Title (de)
Raten-Verzerrungsoptimierung für eine erweiterte Audiokodierung
Title (fr)
Optimisation de la distorsion de vitesse pour codage audio avancé
Publication
Application
Priority
EP 09177267 A 20091126
Abstract (en)
[origin: EP2346031A1] A method for optimization of rate-distortion for Advanced Audio Coding (AAC). The method provides for the identification of quantized spectral coefficient sequences for optimization of rate-distortion. The method also provides joint optimization of scale factors, Huffman codebooks and quantized spectral coefficient sequences for minimization of a rate-distortion cost. The method provides an iterative rate-distortion optimization algorithm for AAC encoding. In each iteration, the method first finds the optimal scale factors and quantized spectral coefficients when Huffman codebooks are fixed, then updates Huffman codebooks and quantized spectral coefficients given the optimized scale factors. The iterations may be applied until a predetermined threshold is attained.
IPC 8 full level
G10L 19/035 (2013.01); G10L 19/02 (2006.01)
CPC (source: EP)
G10L 19/035 (2013.01)
Designated contracting state (EPC)
AT BE BG CH CY CZ DE DK EE ES FI FR GB GR HR HU IE IS IT LI LT LU LV MC MK MT NL NO PL PT RO SE SI SK SM TR
DOCDB simple family (publication)
EP 2346031 A1 20110720; EP 2346031 B1 20150930; CA 2718865 A1 20110526; CA 2718865 C 20151020
DOCDB simple family (application)
EP 09177267 A 20091126; CA 2718865 A 20101026