Title :
Sub-band ADPCM coding for high quality audio signals
Author :
Charbonnier, A. ; Petit, J.P.
Author_Institution :
CNET, Lannion, France
Abstract :
Some investigations are presented on subband ADPCM (adaptive differential pulse-code modulation) algorithms, for the coding of medium or high quality sound signals. This technique combines subband coding with a low number of subbands and ADPCM in each subband. Noise shaping is introduced for substantially improving the subjective quality. The study shows that a 120-kb/s high-quality 15-kHz sound coder can be obtained using this technique. Its complexity allows its implementation on commercially available 16 bit DSP chip
Keywords :
audio equipment; electronic music; encoding; pulse-code modulation; signal processing; 120 kbit/s; 15 kHz; 16 bit; DSP chip; adaptive differential pulse-code modulation; audio equipment; audio signals; noise shaping; signal processing; sound coder; subband ADPCM; subband coding; subjective quality; Acoustic noise; Bit rate; Computational complexity; Digital signal processing chips; Multiple signal classification; Noise shaping; Phase change materials; Quantization; Speech coding; Wideband;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1988. ICASSP-88., 1988 International Conference on
Conference_Location :
New York, NY
DOI :
10.1109/ICASSP.1988.197161
