Title :
Multiplexed predictive coding of speech
Author :
Andersen, Søren Vang ; Kubin, Gernot
Author_Institution :
Dept. of Speech, Music, & Hearing, R. Inst. of Technol., Stockholm, Sweden
Abstract :
We present a novel method for predictive coding with application to transmission of speech over packet-switched networks. Our method uses multiplexing to distribute a part of the information about a segment of each speech signal in several data packets while keeping the data packet rate and payload for that part of the information unchanged. We investigate three multiplexing schemes: a packet hopping, a Hadamard multiplexing, and an extension of the Hadamard multiplexing that exploits a nonlinear preprocessing and estimation method. We show by means of formal AB-preference tests that multiplexed predictive coding can lead to coders that are more robust to packet losses than scalar quantization and packet loss concealment according to the G.711 standard
Keywords :
adaptive codes; filtering theory; integrated voice/data communication; nonlinear estimation; packet switching; prediction theory; quantisation (signal); speech coding; G.711 standard; Hadamard multiplexing; IP traffic; coding algorithms; data packet rate; estimation method; extended Hadamard multiplexing; filter-bank coders; formal AB-preference tests; multiplexed predictive speech coding; nonlinear estimation; nonlinear preprocessing; packet hopping; packet loss concealment; packet-switched networks; perceptual weighting; prediction synthesis filter; scalar predictive speech coders; scalar quantization; segmental signal-to-noise ratio; speech signal segment; speech transmission; transmission errors; Degradation; Payloads; Predictive coding; Propagation losses; Protocols; Quantization; Robustness; Signal processing; Speech coding; Transmitters;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 2001. Proceedings. (ICASSP '01). 2001 IEEE International Conference on
Conference_Location :
Salt Lake City, UT
Print_ISBN :
0-7803-7041-4
DOI :
10.1109/ICASSP.2001.941021
