Title :
Error protection in a low complexity speech codec
Author_Institution :
NTT Wireless Syst. Labs., Kanagawa, Japan
fDate :
29 Sep-2 Oct 1996
Abstract :
This paper proposes a new channel error protection scheme for a low complexity speech codec that is suitable for the Personal Handy-phone System (PHS) multimedia communication. Deterioration of speech quality is suppressed by using CRC and parameter estimation for error protection. Two types of codec are described: a 10-ms frame type that transmits 160 bits every 10 ms and a 15-ms frame type that transmits 160 bits every 15 ms. The computational complexity of these codecs is less than 5 MOPS. In a no-channel error environment, the speech quality is equal to that of G.726 at 32.0 kbit/s. With 0.3% channel error, both codecs offer more comfortable conversation than G.726. Moreover, at 1.0% channel error, the 10-ms frame type still provides comfortable conversation
Keywords :
channel coding; computational complexity; cyclic codes; data communication; land mobile radio; multimedia communication; parameter estimation; speech codecs; speech coding; speech intelligibility; telephone equipment; 10 ms; 10-ms frame type codec; 15 ms; 15-ms frame type codec; 32 kbit/s; CRC; G.726; PHS; Personal Handy-phone System; channel coding; channel error protection; computational complexity; data communication; low complexity speech codec; multimedia communication; parameter estimation; performance evaluation; speech quality; Bit rate; Clocks; Computational complexity; Decoding; Digital signal processing; Energy consumption; Forward error correction; Multimedia communication; Protection; Speech codecs;
Conference_Titel :
Universal Personal Communications, 1996. Record., 1996 5th IEEE International Conference on
Conference_Location :
Cambridge, MA
Print_ISBN :
0-7803-3300-4
DOI :
10.1109/ICUPC.1996.562707
