Multiprocessor implementation of an ATC audio codec

Author

Bochow, B. ; Czyrnik, B.

Author_Institution

Inst. fur Fermmeldetech., Tech. Univ. Berlin, West Germany

fYear

1989

Firstpage

1981

Abstract

A source coding scheme for high-quality audio signals based on adaptive transform coding is presented. Using the well known ATC algorithm of R. Zelinski and P. Noll (1977) as a starting point, the authors have developed an algorithm that features psychoacoustic weighting and a joint bit allocation to stereo channels. The real-time implementation uses a four-node processor network, each node consisting of a T800 transputer and a DSP32 signal processor. Both the codec optimization and the evaluation of subjective quality are facilitated by the fact that many of the codec parameters can be changed online

Keywords

audio signals; codecs; computerised signal processing; encoding; speech analysis and processing; ATC audio codec; DSP32 signal processor; T800 transputer; adaptive transform coding; four-node processor network; high-quality audio signals; joint bit allocation; multiprocessor implementation; psychoacoustic weighting; real-time implementation; source coding scheme; stereo channels; subjective quality; Bit rate; Codecs; Decoding; Discrete cosine transforms; Psychology; Signal processing; Signal processing algorithms; Source coding; Switches; Transform coding;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on

Conference_Location

Glasgow

ISSN

1520-6149

Type

conf

DOI

10.1109/ICASSP.1989.266846

Filename

266846