Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)
- 2000.09a
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- Pages.281-285
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- 2000
Context-based coding of inter-frame DCT coefficients for video compression
비디오 압축을 위한 영상간 차분 DCT 계수의 문맥값 기반 부호화 방법
- Lee, Jin-Hak (HyunDai Electronics Industries Co., Ltd.) ;
- Kim, Jae-Kyoon (Dept. of Electrical Engineering, KAIST)
- Published : 2000.09.01
Abstract
This paper proposes context-based coding methods for variable length coding of inter-frame DCT coefficients. The proposed methods classify run-level symbols depending on the preceding coefficients. No extra overhead needs to be transmitted, since the information of the previously transmitted coefficients is used for classification. Two entropy coding methods, arithmetic coding and Huffman coding, are used for the proposed context-based coding. For Huffman coding, there is no complexity increase from the current standards by using the existing inter/intra VLC tables. Experimental results show that the proposed methods give ~ 19% bits gain and ~ 0.8 dB PSNR improvement for adaptive inter/intra VLC table selection, and ~ 37% bits gain and ~ 2.7dB PSNR improvement for arithmetic coding over the current standards, MPEG-4 and H.263. Also, the proposed methods obtain larger gain for small quantizaton parameters and the sequences with fast and complex motion. Therefore, for high quality video coding, the proposed methods have more advantage.
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