[Abstract] [Experimental Results] [References] [PDF]
Recent video coding research gives birth to the latest video coding standard H.264/AVC whose compression performance significantly exceeds previous standards with more than 50%. But as compared with the MPEG-4, the capability of coding arbitrarily shaped objects is absent from the latest standard. In this paper, we propose a new arbitrarily shaped object coding codec including encoder and decoder based on the latest H.264/AVC, which adopts improved binary alpha coding with a novel motion estimation to facilitate the binary alpha blocks prediction and in the texture coding, a new arbitrarily shaped integer transform derivative from 4x4 ICT in H.264 to code texture and associated coding techniques. Extension in High Definition sequences and subjective evaluations are made. Experimental results prove the coding efficiency and flexibility of our proposal and the potential applications are demonstrated.
Experimental Results (Compressed by JPEG)
(a) the block diagram of encoder
(b) the block diagram of decoder
Fig.1 the block diagrams of object coding codec.
Fig.2 Three types Macroblocks .
Fig.3 the performance of object coding in CIF and QCIF.
Fig.4 the performance of object coding in HD.
No matter what the resolution is, the result of object coding only can approach to the performance of H.264 but do not win or even equal to it in terms of the traditional measurement (PSNR).
After error elimination and normalization (1~5 points) referred to the original sequence, 18 sets of subjective test results are sampled. The results are listed in following figures.
Fig.5 Subjective test result of CIF sequences.
Fig.5 Subjective test result of HD sequences.
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