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An Analysis and Modeling of Propagation/Accumulation Errors Incurred by CD in the FD-CD Transcoding  

Kim Jin soo (한밭대학교 정보통신컴퓨터공학부)
Kim Jae Gon (한국전자통신연구원 방송미디어연구그룹)
Kim Hyung Myung (한국과학기술원 전기및전자공학전공)
Hong Jin Woo (한국전자통신연구원 방송미디어연구그룹)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.12C, 2004 , pp. 1677-1685 More about this Journal
Abstract
Recently, FD (Frame Dropping)-CD (Coefficient Dropping) transcoding is considered due to the low computational complexity and simple implementation. The conventional FD-CD transcoding schemes have not considered the CD errors that tend to be propagated and accumulated. In this paper, we derive the error characteristics incurred by the CD errors and, through computer simulations, we show that the CD errors are propagated and not negligible to the decoded qualities of the next frames within single GOP. Then, we propose an exponential-decaying model that describes well the characteristics of propagation/accumulation errors. Finally, it is shown that the proposed model can be effectively used for estimating the overall distortions incurred by the CD errors.
Keywords
FD(Frame Drop); CD(Coefficient Drop); Transcoding;
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