한국방송∙미디어공학회:학술대회논문집 (Proceedings of the Korean Society of Broadcast Engineers Conference)
- 한국방송공학회 2014년도 하계학술대회
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- Pages.26-27
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- 2014
경계 강도 기반의 적응적 보간 필터
Boundary Strength based Adaptive Interpolation Filter
- Song, Yunseok (Gwangju Institute of Science and Technology (GIST)) ;
- Choi, Jung-Ah (Gwangju Institute of Science and Technology (GIST)) ;
- Ho, Yo-Sung (Gwangju Institute of Science and Technology (GIST))
- 발행 : 2014.06.30
초록
This paper presents an adaptive interpolation filtering scheme for the High Efficiency Video Coding (HEVC) standard. In regards to interpolation for motion estimation and compensation, the conventional HEVC employs 8-tap and 4-tap filters for luma and chroma samples, respectively. Coefficients in such filters are determined by discrete cosine transform (DCT). In the proposed scheme, boundary strength values are stored after the execution of the deblocking filter. For each block, the sum of boundary strength values is calculated to indicate whether its region is complex or simple. Consequently, based on the region classification, 12-tap and 8-tap interpolation filters are used for complex and simple regions, respectively. This process is applied to luma sample interpolation only. Simulation results show 1.8% average BD-rate reduction compared to the conventional method.
키워드