Title :
Efficient CELP-based diversity schemes for VoIP
Author :
Anandakumar, Anand K. ; McCree, Alan ; Viswanathan, Vishu
Author_Institution :
DSP Solutions R&D Center, Texas Instrum. Inc., Dallas, TX, USA
fDate :
6/22/1905 12:00:00 AM
Abstract :
Diversity schemes include information about packet n in future packets or send information about packet n via separate paths. If packet n is lost, it is reconstructed from information included in future packets or information received via separate paths. This paper presents CELP-based diversity schemes for voice over packet applications. The diversity schemes reduce the impact of packet losses while being efficient in terms of both bandwidth requirement and computational complexity. With our diversity schemes, transmission schemes that allocate bandwidth resources among diversity stages during congestion give significantly better performance than schemes that use no diversity during congestion, for the same bandwidth usage
Keywords :
Internet telephony; computational complexity; decoding; diversity reception; linear predictive coding; packet switching; speech coding; transport protocols; LPC; RTP/UDP/IP protocols; VoIP; adaptive codebook; bandwidth requirement; bandwidth resources allocation; bandwidth usage; computational complexity; congestion; efficient CELP-based diversity; packet losses; packet reconstruction; packet transmission; speech coding; voice over packet applications; Bandwidth; Computational complexity; Internet telephony; Linear predictive coding; Protocols; Quality of service; Redundancy; Speech analysis; Speech coding; Speech synthesis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2000. ICASSP '00. Proceedings. 2000 IEEE International Conference on
Print_ISBN :
0-7803-6293-4
DOI :
10.1109/ICASSP.2000.860201
