Title :
Theoretical analysis of the ADPCM CCITT algorithm
Author :
Bonnet, Madeleine ; Macchi, Odile ; Jaidane-Saidane, Meriem
Author_Institution :
CNRS-ESE, Gif-sur-Yvette, France
fDate :
6/1/1990 12:00:00 AM
Abstract :
The unfavorable effects of narrowband inputs on the decoder adjustment when the LMS algorithm is used are analyzed. An explanation is given for the behavior of the CCITT algorithm. Suboptimality of prediction is granted to achieve adjustment, resulting in a satisfactory tradeoff between reduction rate and adjustment. The link between adjustment and uniform stability is enhanced
Keywords :
encoding; filtering and prediction theory; pulse-code modulation; speech analysis and processing; 32 kbit/s; ADPCM; CCITT algorithm; LMS algorithm; decoder adjustment; narrowband inputs; prediction suboptimality; reduction rate; speech coding; uniform stability; Algorithm design and analysis; Communication networks; Decoding; Least squares approximation; Narrowband; Phase change materials; Pulse modulation; Quantization; Speech; Stability;
Journal_Title :
Communications, IEEE Transactions on
