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An Adaptive Control for the Propagation Errors Incurred by DCT Coefficient-Dropping Transcoder
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  • An Adaptive Control for the Propagation Errors Incurred by DCT Coefficient-Dropping Transcoder
  • An Adaptive Control for the Propagation Errors Incurred by DCT Coefficient-Dropping Transcoder
저자명
Kim. Jin-Soo,Kim. Jae-Gon,Seo. Kwang-Deok,Yun. Mong-Han
간행물명
ETRI journal
권/호정보
2007년|29권 5호|pp.559-568 (10 pages)
발행정보
한국전자통신연구원
파일정보
정기간행물|ENG|
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기타
이 논문은 한국과학기술정보연구원과 논문 연계를 통해 무료로 제공되는 원문입니다.
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기타언어초록

This paper presents a new distortion control scheme with a simple estimation model for the propagation errors incurred by dropping some parts of the bitstream in a frame dropping-coefficient dropping (FD-CD) transcoder. The primary goal of this paper is to facilitate bit-rate conversions and rate-distortion controls in the compressed domain without introducing a full decoding and reencoding system in the pixel domain. First, the error propagation behavior over several frame sequences due to coefficient dropping is investigated on the basis of statistical and empirical properties. Then, such properties are used to develop a simple estimation model for the CD distortion accounting for the characteristics of the underlying coded-frame. Finally, the proposed estimation model allows us to determine the amount of coefficient dropping and to effectively allocate rate-distortions into coded-frames. Experimental results show that the proposed estimation model accurately describes the characteristics of propagation errors adaptively in the compressed domain and can be easily applied to distortion control over different kinds of video sequences.