(A) multi-transform architecture for H.264/AVC high-profile coders = H.264/AVC 하이 프로파일 코더를 위한 다중 변환 아키텍처의 설계

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The state-of-the-art video coding standard H.264/AVC uses the transform coding to compress video data in spatial domain. Although its complexity isn’t quite high due to integer-based arithmetic, the throughput requirement comes to increase because the H.264/AVC encoder uses ABT(Adaptive Block-Size Transform) to improve encoding performance. For real-time processing of such transform coding, this thesis proposed a high-throughput, cost-effective implementation of six different integer transforms in the H.264/AVC high-profile coders, i.e., $4\times4$ forward, $4\times4$ inverse, forward Hadamard, inverse Hadamard, $8\times8$ forward, and $8\times8$ inverse transform, all integrated as a shared hardware. At first, the $4\times4$ multi-transform architecture which can process one of four $4\times4$ transform types within two clock cycles is proposed. The $4\times4$ transform matrices are regularized by using permutation, partitioned into $2\times2$ blocks, and factored for maximal hardware sharing between two different phases within each transform as well as among four different $4\times4$ transforms. Secondly, the multi-transform architecture which can process any type of six different transform types is proposed. By using two types of $4\times4$ transform matrices included in a $8\times8$ transform matrix, two different $8\times8$ transforms are both described as three steps and unified with minor modification. To improve throughput of the transform, two independent $4\times4$ transform blocks within the $8\times8$ transform block operate in parallel in the $4\times4$ transform mode, while the two-stage pipelined architecture is used in the $8\times8$ transform mode. Experimental results shows that the proposed transform has the same coding performance in terms of bitrate and PSNR as the transform in H.264/AVC reference software. Hardware implementation results show that the maximum operating frequency of the proposed multi-transform architecture is 200 MH...
Advisors
Kyung, Chong-Minresearcher경종민researcher
Description
한국과학기술원 : 전기 및 전자공학과,
Publisher
한국과학기술원
Issue Date
2010
Identifier
418732/325007  / 020045306
Language
eng
Description

학위논문(박사) - 한국과학기술원 : 전기 및 전자공학과, 2010.2, [ viii, 70 p. ]

Keywords

transform; DCT; H.264/AVC; Hadamard; 비디오코덱; 정수변환; 하다마드변환; 이산코사인변환; integer transform

URI
http://hdl.handle.net/10203/35566
Link
http://library.kaist.ac.kr/search/detail/view.do?bibCtrlNo=418732&flag=dissertation
Appears in Collection
EE-Theses_Ph.D.(박사논문)
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