논문 해외 국제전문학술지(SCI급) An Adaptive Control for the Propagation Errors Incurred by DCT Coefficient-Dropping Transcoder
- 학술지 구분 국제전문학술지(SCI급)
- 게재년월 2007-10
- 저자명 김진수
- 학술지명 ETRI Journal
- 발행처명 ELECTRONICS TELECOMMUNICATIONS RESEARCH INST
- 발행국가 해외
- 논문언어 외국어
- 전체저자수 4
홈페이지논문 초록 (Abstract)
This paper presents a new distortion control scheme with a simple estima tion model for the propagation errors incurred by dropping some parts of the bitstream in a frame dropping-coefficient dropping (FD-CD) transcod er. The primary goal of this paper is to facilitate bit-rate conversions and rate-distortion controls in the compressed domain without introduci ng a full decoding and reencoding system in the pixel domain. First, the error propagation behavior over several frame sequences due to coeffici ent dropping is investigated on the basis of statistical and empirical p roperties. Then, such properties are used to develop a simple estimation model for the CD distortion accounting for the characteristics of the u nderlying coded-frame. Finally, the proposed estimation model allows us to determine the amount of coefficient dropping and to effectively allo cate rate-distortions into coded-frames. Experimental results show that the proposed estimation model accurately describes the characteristics of propagation errorsadaptively in the compressed domain and can be ea sily applied to distortion control over different kinds of video sequenc es.