Title :
A DSP implemented speech/voiceband data discriminator
Author :
Casale, S. ; Giarrizzo, C. ; La Corte, A.
Author_Institution :
Catania Univ., Italy
fDate :
28 Nov-1 Dec 1988
Abstract :
A very powerful speech/voiceband-data discriminator on a 64 kb/s PCM (pulse code modulation) channel, implemented on a single-chip digital signal processor, is presented. Its performance has been evaluated by external simulation (modem for data, recorded tape for speech), giving very good results in terms of response time and false detection probability. The increased clipping of incoming speech channels in DSI (digital speech interpolation) and the limitations of the CCIT G.721 ADPCM (adaptive differential PCM) encoding algorithm with respect to data transmission are pointed out. The total elaboration time to perform discrimination on a single channel is less than 62 μs when a TMS32020 is used. A two-channel speech/voiceband-data discriminator could be implemented on a faster and more powerful digital signal processor
Keywords :
data communication equipment; digital signal processing chips; discriminators; encoding; pulse-code modulation; voice communication; 62 mus; 64 kbit/s; ADPCM encoding algorithm; CCIT G.721; DSI; PCM channel; TMS32020; adaptive differential PCM; clipping; data transmission; digital signal processor; digital speech interpolation; elaboration time; false detection probability; incoming speech channels; modem; pulse code modulation; recorded tape; response time; simulation; single chip DSP; speech/voiceband data discriminator; Digital modulation; Digital signal processing; Digital signal processors; Modems; Modulation coding; Phase change materials; Pulse modulation; Speech analysis; Speech coding; Speech processing;
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.1988.26060
