Title :
Variable time delay and bit rate speech communication on ATM networks
Author :
Zhen, Yang ; Xiwei, Huang ; Houjie, Bi
Author_Institution :
Dept. of Electron. Eng., Shanghai Jiaotong Univ., China
Abstract :
There are some new demands on speech processing when voice communication is carried out over ATM networks. This paper discusses some problems of speech coding and transmission on ATM networks. We propose two schemes for speech processing, which have variable transmission delay and bit rate respectively, to reach at the goals: small assembly delay, high transmission efficiency and toll speech quality. We transmit different speech cells in different time intervals and define a new “distribution entropy” to classify different input signals. We then design a new speech codec in the second scheme whose bit rate is perceptual importance based. It has better speech quality than that of the G.727 system
Keywords :
asynchronous transfer mode; codecs; delays; entropy; speech coding; speech intelligibility; voice communication; ATM networks; G.727 system; distribution entropy; high transmission efficiency; input signals classification; perceptual importance based bit rate; small assembly delay; speech cells; speech codec; speech coding; speech communication; speech processing; speech quality; speech transmission; toll speech quality; variable bit rate; variable time delay; variable transmission delay; voice communication; Assembly; Asynchronous transfer mode; Bit rate; Circuits; Delay effects; Oral communication; Speech codecs; Speech coding; Speech processing; Speech synthesis;
Conference_Titel :
Communication Technology Proceedings, 1998. ICCT '98. 1998 International Conference on
Conference_Location :
Beijing
Print_ISBN :
7-80090-827-5
DOI :
10.1109/ICCT.1998.743230
