Title :
Multiprocessor implementation of an ATC audio codec
Author :
Bochow, B. ; Czyrnik, B.
Author_Institution :
Inst. fur Fermmeldetech., Tech. Univ. Berlin, West Germany
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;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1989. ICASSP-89., 1989 International Conference on
Conference_Location :
Glasgow
DOI :
10.1109/ICASSP.1989.266846
