Title :
Two approaches for waveform coding of 9.6 kbit/s voiceband data signals through 32 kbit/s ADPCM
Author :
Benvenuto, N. ; Daumer, W.R.
Author_Institution :
AT&T Bell Labs., Holmdel, NJ, USA
fDate :
3/1/1988 12:00:00 AM
Abstract :
Two approaches are presented for accommodating 9.6 kb/s modem signals (e.g. V.29) through 32 kb/s ADPCM (adaptive digital pulse-code modulation) links. These are small changes in the existing algorithm and coding with ADPCM incorporating a 5-bit, rather than 4-bit quantizer. For each approach, tradeoffs between performance and implementation complexity are described
Keywords :
encoding; modems; pulse-code modulation; speech analysis and processing; vocoders; 32 kbits/s; 9.6 kbits/s; ADPCM; V.29; adaptive digital pulse-code modulation; algorithm; modem signals; voiceband data signals; waveform coding; Digital signal processing; Equations; Error analysis; Manufacturing; Modems; Phase change materials; Sampling methods; Signal processing; Signal to noise ratio; Stress measurement;
Journal_Title :
Communications, IEEE Transactions on
