Title :
Speech coding technology for ATM networks
Author :
Kitawaki, Nobuhiko ; Nagabuch, Hiromi ; Taka, M. ; Takahashi, Kenzo
Author_Institution :
NTT Telecommun. Network Lab., Tokyo, Japan
Abstract :
A type of speech coding for asynchronous transfer mode (ATM) is described. Cell processing, which improves service quality, is taken into account. Missing-cell recovery methods are discussed, and the distinctive features of missing-cell recovery methods used with low-bit-rate coding are examined. An example of the speech quality obtained using speech coding techniques in the ATM networks is described. The performance levels for increasing cell loss are compared for various speech coding methods, in combination with methods for dividing coded speech signals into cells and discarding cells. Representative feasible network applications of coding technologies are considered.<>
Keywords :
ISDN; broadband networks; encoding; speech analysis and processing; ATM networks; ISDN; asynchronous transfer mode; broadband integrated services digital network; low-bit-rate coding; missing-cell recovery methods; speech coding; Assembly; Asynchronous transfer mode; Codecs; Hardware; Ice; Packet switching; Q factor; Smoothing methods; Speech coding; Speech processing;
Journal_Title :
Communications Magazine, IEEE