Hash rearrangement scheme for HEVC screen content coding
- Title
- Hash rearrangement scheme for HEVC screen content coding
- Author
- 정제창
- Keywords
- video coding; hash rearrangement scheme; HEVC screen content coding; intra block copy; SCC; high efficiency video coding; IBC hash generation
- Issue Date
- 2018-04
- Publisher
- INST ENGINEERING TECHNOLOGY-IET
- Citation
- IET IMAGE PROCESSING, v. 12, no. 4, page. 479-484
- Abstract
- This study presents a hash rearrangement scheme to improve coding efficiency of high-efficiency video coding for screen content (HEVC-SCC) by sharing hashes of the inter-search with intra block copy (IBC). Of the various methods introduced during the HEVC-SCC development, the IBC search technique can yield tremendous coding gains, but creates a massive computational burden on the encoder side. The authors propose an effective way to generate the IBC hash table to avoid redundant operations required for hash entry computation. Moreover, the authors propose a hash rearrangement scheme to apply the second hashes used in the inter-search to IBC and the corresponding IBC search method to reduce the computational burden and to improve the coding efficiency. The experimental results show that compared with the HEVC-SCC test model (SCM)-8.0, the proposed algorithm results 80% time reduction when considering IBC hash generation itself, and can save 9-30% of hash generation time even taking into account the proposed second hash generation. It can also reduce the hash-based IBC search time by 14.61%. Furthermore, the proposed algorithm can achieve Bjontegaard delta bit rate savings of -0.66, -0.45 and -0.66% on average for all intra, low-delay, and random access coding structures, respectively.
- URI
- https://digital-library.theiet.org/content/journals/10.1049/iet-ipr.2017.0853https://repository.hanyang.ac.kr/handle/20.500.11754/118389
- ISSN
- 1751-9659; 1751-9667
- DOI
- 10.1049/iet-ipr.2017.0853
- Appears in Collections:
- COLLEGE OF ENGINEERING[S](공과대학) > ELECTRONIC ENGINEERING(융합전자공학부) > Articles
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