Title :
A bi-dimensional coding scheme applied to audio bitrate reduction
Author :
Mainard, L. ; Lever, M.
Author_Institution :
CCETT, Cesson Sevigne, France
Abstract :
We present an audio bidimensional encoding scheme. Taking advantage of a new complex filter-bank, and of a regular lattice associated with a new hexagonal projection kernel, this scheme provides each step of the encoder and of the decoder with fast algorithms, which keeps the overall complexity low. Moreover variable or fix length encodings are available without a look-up table. The results show a very good quality at 80 kbit/s for monophonic signals, and a significant improvement with respect to normalized algorithms of a similar complexity
Keywords :
audio coding; band-pass filters; channel capacity; filtering theory; lattice filters; quantisation (signal); variable length codes; 80 kbit/s; audio bidimensional encoding; audio bitrate reduction; decoder; encoder; fast algorithms; hexagonal projection kernel; monophonic signals; normalized algorithms; regular lattice; variable length coding; Bit rate; Decoding; Encoding; Filter bank; Kernel; Lattices; Psychoacoustic models; Shape; Statistics; Vector quantization;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.543296
