Title :
Mixed-domain coding of speech at 3 kb/s
Author :
De Martin, Juan Carlos ; Gersho, Allen
Author_Institution :
Dipartimento di Elettronica, Politecnico di Torino, Italy
Abstract :
We present a speech coding algorithm called mixed-domain residual coding (MDRC) wherein a prototype pitch cycle in each frame of the speech residual is coded in the time-domain while interpolation of the residual signal is performed in the frequency-domain. A novel quantization scheme takes into account time scaling and differentially codes successive prototypes with a closed-loop perceptually-weighted search. A fixed-rate (3.15 kb/s) implementation of MDRC achieves quality better or comparable to higher rate coders such as FS 1016 CELP and IMBE
Keywords :
frequency-domain analysis; interpolation; quantisation (signal); speech coding; time-domain analysis; 3.15 kbit/s; MDRC; closed-loop perceptually-weighted search; fixed-rate implementation; frequency-domain; interpolation; low bit rate; mixed-domain residual coding; prototype pitch cycle; quantization scheme; residual signal; speech coding algorithm; speech quality; time scaling; time-domain; Decoding; Design engineering; Digital signal processing; Instruments; Interpolation; Power harmonic filters; Prototypes; Quantization; Speech coding; Time domain analysis;
Conference_Titel :
Acoustics, Speech, and Signal Processing, 1996. ICASSP-96. Conference Proceedings., 1996 IEEE International Conference on
Conference_Location :
Atlanta, GA
Print_ISBN :
0-7803-3192-3
DOI :
10.1109/ICASSP.1996.540329
