상세정보
학술지
Rate-Distortion Optimized Adaptive Transform Coding
- 발행일
- 200908
- 출처
- Optical Engineering, v.48 no.8, pp.1-43
- ISSN
- 0091-3286
- 출판사
- SPIE
- 협약과제
- 09MR4100, 차세대DTV핵심기술개발(표준화연계)-무안경개인형3D방송기술개발(계속), 김진웅
- 초록
- We propose a rate-distortion optimized transform coding method that adaptively employs either integer cosine transform that is an integer-approximated version of discrete cosine transform (DCT) or integer sine transform (IST) in a rate-distortion sense. The DCT that has been adopted in most video-coding standards is known as a suboptimal substitute for the Karhunen-Lo챔ve transform. However, according to the correlation of a signal, an alternative transform can achieve higher coding efficiency. We introduce a discrete sine transform (DST) that achieves the high-energy compactness in a correlation coefficient range of -0.5 to 0.5 and is applied to the current design of H.264/AVC (advanced video coding). Moreover, to avoid the encoder and decoder mismatch and make the implementation simple, an IST that is an integer-approximated version of the DST is developed. The experimental results show that the proposed method achieves a Bjontegaard Delta-RATE gain up to 5.49% compared to Joint model 11.0. © 2009 Society of Photo-Optical Instrumentation Engineers.
- KSP 제안 키워드
- Advanced video coding(AVC), Coding efficiency, Coding method, Coding standard, Correlation Coefficient, Discrete cosine Transform, Discrete sine transform(DST), Encoder and Decoder, Joint model, Optical instrumentation, adaptive transform