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Down Sampling for Fast Rough Mode Decision for a Hardware-based HEVC Intra-frame encoder
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  • Journal title : Journal of Broadcast Engineering
  • Volume 21, Issue 3,  2016, pp.341-348
  • Publisher : The Korean Institute of Broadcast and Media Engineers
  • DOI : 10.5909/JBE.2016.21.3.341
 Title & Authors
Down Sampling for Fast Rough Mode Decision for a Hardware-based HEVC Intra-frame encoder
Jang, Ji Hun; Rhee, Chae Eun;
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 Abstract
HEVC is the next compression standard and is expected to be used widely replacing the conventional H.264/AVC standard. The compression ratio of the HEVC is twice times than H.264/AVC, whereas its computational complexity is increased by up to 40%. Many research efforts have been made to reduce the computational complexity and to speed up encoding. For intra coding, the rough mode decision (RMD) is commonly applied. The rate-distortion optimization (RDO) process to decide the best mode is too complex so that RMD chooses the candidate modes with a simple process and sends the candidates to RDO process. However, for large-size blocks, the RMD also requires considerable computations. In this paper, a down-sampling scheme is proposed for the RMD process. The reference pixel loading, predicted pixel generation are performed using the down-sampled pixel data. When the proposed scheme is applied to the RMD, the computational complexity is reduced by 70% with a marginal bitrate increase of 0.04%. In terms of area of hardware-based RMD, the gate count and the buffer size is reduced 33% and 66%, respectively.
 Keywords
Down-sampling;Rough mode decision;HEVC;intra prediction;
 Language
Korean
 Cited by
 References
1.
JW Kim, DH Kim, JG Kim, “An Early Termination Algorithm of Prediction Unit(PU) Search for Fast HEVC Encoding”, JBE, Vol19, No.5, p628-630, Septemver, 2014.

2.
EY Won, SI Chae, "An Improved RDO Algorithm for the HEVC intra encoder", KSBE Summer Conference, p123-126, June, 2013.

3.
Tariq, Junaid, and Sam Kwong. "Hybrid Fast Intra Mode Decision And Early Termination of Prediction Unit(PU) Splitting For HEVC", Systems, Man, And Cybernetics (SMC), 2015 IEEE International Conference on. IEEE, 2015.

4.
Lainema, Jani, et al. “Intra coding of the HEVC standard.” Circuits and Systems for Video Technology, IEEE Transactions on 22.12, 2012 crossref(new window)

5.
Zhang, Qiuwen, et al. “A fast and efficient coding unit size decision algorithm based on temporal and spatial correlation.” Optik-International Journal for Light and Electron Optics 126.21, 2015 crossref(new window)

6.
Lee, Jaeho, et al. “A fast CU size decision algorithm for HEVC.” Circuits and Systems for Video Technology, IEEE Transactions on 25.3 , 2015