Title :
Variable rate voice coding system
Author :
Sasaki, Seishi ; Miyake, Masayasu
Author_Institution :
Kokusi Electr. Co Ltd., Sendaishi, Japan
Abstract :
The authors discussed a variable bit rate voice coding system in digital communications networks. A novel voice compression method which provides significant improvement in transmission efficiency and flexibility for communications systems is described. The basic scheme used for the investigations involves the use of split vector quantized (SVQ) transform coding (TC) in conjunction with pitch prediction (PP) to achieve excellent voice quality at rates of 4.8 kb/s and below. The authors describe of the algorithm and its implementation for a variable bit rate voice coding system from 4.8 kb/s to 2.4 kb/s
Keywords :
discrete cosine transforms; filtering and prediction theory; speech coding; vector quantisation; 2.4 to 4.8 kbit/s; DCT; SVQ; algorithm; digital communications networks; pitch prediction; split vector quantized; transform coding; transmission efficiency; variable bit rate; voice coding system; voice compression method; voice quality; Bit rate; Delay estimation; Digital communication; Discrete cosine transforms; Frequency domain analysis; Laboratories; Speech analysis; Speech synthesis; Transform coding; Vector quantization;
Conference_Titel :
Military Communications Conference, 1992. MILCOM '92, Conference Record. Communications - Fusing Command, Control and Intelligence., IEEE
Conference_Location :
San Diego, CA
Print_ISBN :
0-7803-0585-X
DOI :
10.1109/MILCOM.1992.244056
