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Browse Journals & Magazines > Communications, IEEE Transact ...> Volume:38 Issue:5 Help

Performance improvements using synchronous code correction in ADPCM/PCM tandem connections

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2 Author(s)
Mills, J. ; Tellabs Res. Center, Mishawaka, IN, USA ; Melsa, J.

A sufficient condition for the existence of tandem distortion accumulation is described. The distortion for a sample time at which the sufficient condition is satisfied is studied. It is shown that the transcoding distortion is greater than the adaptive differential pulse code modulation (ADPCM) distortion when synchronous code correction is not used and less than the ADPCM distortion when synchronous code correction is used. These results are combined to show that when synchronous code correction is used, the upper bound of the single transcoding distortion is determined by the single transcoding distortion when synchronous code correction is not used. This bound cannot be generalized for multiple tandem cases

Published in:
Communications, IEEE Transactions on  (Volume:38 ,  Issue: 5 )

Date of Publication: May 1990

Page(s):
561 - 564
ISSN :
0090-6778
INSPEC Accession Number:
3711661
Digital Object Identifier :
10.1109/26.54965
Product Type:
Journals & Magazines
Date of Current Version :
06 August 2002
Issue Date :
May 1990
Sponsored by :
IEEE Communications Society

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