Title :
Voiceband data compression at 16 kb/s
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
fDate :
28 Nov-1 Dec 1988
Abstract :
The effects of waveform coding on voiceband data are explored. In particular, voiceband data compression at 16 kb/s is considered, and the performance and attributes of several 16 kb/s compression algorithms (APC, ATC, CELPC, PCM, SBC, and VQ) are discussed. Three mechanisms for improving performance are noted: decreasing the error variance, increasing the correlation between signal and error, and limiting the maximum excursion of the error. It is shown that PCM (pulse code modulation) successfully capitalizes on the latter two mechanisms to deliver performance comparable or superior to much more complicated coders. It is shown that good performance for speech does not imply good performance for data and that coders optimized for voiceband data significantly outperform their speech-specific counterparts
Keywords :
data compression; encoding; 16 kbit/s; APC; ATC; CELPC; PCM; SBC; VQ; compression algorithms; correlation; error variance; pulse code modulation; speech analysis; speech processing; voiceband data compression; waveform coding; Additive noise; Data compression; Demodulation; Phase change materials; Pulse modulation; Quantization; Signal to noise ratio; Speech coding; Speech enhancement; Telecommunication traffic;
Conference_Titel :
Global Telecommunications Conference, 1988, and Exhibition. 'Communications for the Information Age.' Conference Record, GLOBECOM '88., IEEE
Conference_Location :
Hollywood, FL
DOI :
10.1109/GLOCOM.1988.25849
