Title :
Fast encoding algorithms for MPEG-4 TwinVQ audio tool
Author :
Iwakami, Naoki ; Moriya, Takehiro ; Jin, Akio ; Mori, Takeshi ; Chikira, Kazuaki
Author_Institution :
NTT Labs., Tokyo, Japan
Abstract :
The ISO/IEC MPEG-4 audio standard includes the TwinVQ encoding tool. This tool is suitable for low-bit-rate general audio coding, but a drawback is the computational complexity of the encoder. To develop a faster TwinVQ encoder, new fast vector quantization algorithms - area localized pre-selection and hit zone masking - are introduced. These algorithms exploit the pre- and main-selection procedure scheme of the conjugate structure vector quantization which is used in the TwinVQ. The improvement is evaluated by measuring the encoding speed and the sound quality of reproduction
Keywords :
audio coding; code standards; vector quantisation; ISO/IEC MPEG-4 audio standard; TwinVQ audio tool; area localized pre-selection algorithm; audio coding; computational complexity; conjugate structure vector quantization; encoding algorithms; encoding speed; hit zone masking algorithm; sound quality; Audio coding; Computational complexity; Decoding; Distortion measurement; Encoding; IEC standards; ISO standards; Laboratories; MPEG 4 Standard; Vector quantization;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.940352
