کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
528683 869593 2014 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Alternating asymmetric search range assignment for bidirectional motion estimation in H.265/HEVC and H.264/AVC
موضوعات مرتبط
مهندسی و علوم پایه مهندسی کامپیوتر چشم انداز کامپیوتر و تشخیص الگو
پیش نمایش صفحه اول مقاله
Alternating asymmetric search range assignment for bidirectional motion estimation in H.265/HEVC and H.264/AVC
چکیده انگلیسی


• The huge complexity of motion estimation is a critical problem for implementation.
• We propose alternating asymmetric search range assignment (AASRA) to save complexity.
• Temporal AASRA (T-AASRA) and temporal-spatial AASRA (TS-AASRA) are proposed.
• T-AASRA and TS-AASRA can get 43.5% and 65.2% complexity reduction, respectively.
• AASRA has the flexibility to be combined with existing algorithms and architectures.

Bidirectional motion estimation (ME) significantly enhances video coding efficiency, whereas its huge complexity is also a critical problem for implementation. This paper presents alternating asymmetric search range assignment (AASRA) schemes to reduce the complexity by switching the use of a large and a small search ranges (SR.L and SR.S). A temporal AASRA (T-AASRA) scheme performs search range switching between past and future reference directions. A temporal-spatial AASRA (TS-AASRA) scheme performs more aggressive switching on the two dimensions of reference direction and MB/CTB index. T-AASRA and TS-AASRA achieve 43.5% and 65.2% complexity reduction, respectively, with small coding efficiency drop. Even after removing the factor of coding efficiency drop, the two schemes still show 38.4% and 54.7% equivalent complexity reduction. AASRA can also be combined with existing fast algorithms for further complexity saving, which has been demonstrated on hierarchical ME and dynamic search range selection algorithms.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Visual Communication and Image Representation - Volume 25, Issue 5, July 2014, Pages 1275–1286
نویسندگان
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