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  • Andy C. Yu
  • 2004 IEEE International Conference on Acoustics…
  • 2004
One of the new features introduced in the emerging video coding standard, H.264/ MPEG-4 AVC (advanced video coding), is the utilization of flexible block sizes ranging from 4/spl times/4 to 16/spl times/16 in inter-frame coding. The aim is to reduce the error due to fixed block size prediction within a macroblock. However, this feature results in extremely(More)
A fast inter-mode selection algorithm is proposed to improve the encoder efficiency of the H.264/MPEG-4 AVC standard, but with insignificant degradation in picture quality. The modified fast inter-mode selection (MFInterms) algorithm extends previous work to provide a. more efficient prediction of mode decision. The strategy incorporates temporal similarity(More)
Intra-frame mode selection and inter-frame mode selection are new features introduced in the H.264 standard. Intra-frame mode selection dramatically reduces spatial redundancy in Iframes, while inter-frame mode selection significantly affects the output quality of P-/Bframes by selecting an optimal block size with motion vector(s) or a mode for each(More)
A technique for performing progressive mesh-based motion estimation in a layered fashion is presented. Motion compensation based on image warping provides a block prediction free of block artifacts. The smooth prediction can be used to identify motion-active regions by comparing with the reference frame and generate a partial denser mesh, thus forming(More)
We approach image compression using an affine symmetric image representation that exploits rotation and scaling as well as the translational redundancy present between image blocks. It resembles fractal theory in the sense that a single prototypical block is needed to represent other similar blocks. Finding the optimal prototypes is not a trivial task(More)
Multiple intra-mode prediction is one of the new features introduced in the emerging video standard, H.264/AVC. Its function is to further reduce spatial redundancies in an intracoded macroblock prior to conventional transform coding and entropy coding. However, the process is computationally expensive especially when Lagrangian cost evaluation is employed.(More)
Scalable video coding utilizing the wavelet transform applied to both the spatial and temporal domains (3D-DWT) is of current interest in video coding. In the case of the 2D+t scheme, motion estimation is required to be conducted in the wavelet domain. We explore approaches that overcome the well-known shift-variant property of the wavelet transform so that(More)
A fast algorithm for mesh-based motion estimation employing uniform triangular patches is proposed. The technique utilises an embedded block model to estimate the motion of the mesh grid points. Without the need for time-consuming evaluation, the algorithm reduces the number of search iterations according to the inherent motion. A block-wise coding approach(More)
We present an efficient lossless contour coding scheme based on a chain code representation. The algorithm is suitable for the binary shape coding of arbitrarily-shaped objects. Previous attempts to exploit the correlation between successive chain links have resulted in a complex encoding process, due either to the employment of chain code post processing(More)