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- W2241660112 abstract "Motion estimation is a key element in video signal interframe coding systems. Among the different techniques proposed for the estimation of movement of pixels between two successive frames, full-search block-matching algorithms (FSBMA) are more attractive due to their low mathematical complexity. The FSBMA based on the mean absolute difference (MAD) criterion, is preferred from a hardware implementation point of view, because it does not require any multiplication or division [1]. Furthermore, its matching performance is comparable to the one achieved with other more complex matching criteria. A bit-serial parallel processing VLSI architecture of the FSBMA based on the MAD matching criterion is proposed in this paper. It is well suited for the estimation of motion in low bit-rate applications as teleconferencing and videophone systems. The complexity of the architecture is minimal and it features a high degree of regularity; reducing in consequence, the time and effort required for designing the layout, which is estimated to take a few man-week units, even if it is fully-customized. The basic building blocks of the architecture are shift registers and bit serial units (adders, subtracters, and one comparator), which favors bit serial data processing and a high pipeline efficiency. In terms of hardware this has two consequences. First, the capacitive load downstream of each node is minimal and thus the different modules can run at high frequencies [2] (several hundreds of MHz). Second, the full pipeline characteristic of the blocks performing both the arithmetical operations and movement of data, allows an efficient use of hardware of nearly 100% during a frame cycle[2]. The architecture is completely independent of the size of the search area associated with full search matching algorithms. By programming the control unit and the address generator we can select the size of the search area. Finally, this architecture is fully compatible with a 2D-DCT chip that has been previously developed, integrated and tested by the authors of this paper. Local memory, conversion registers and control signals can be shared by these two main components of video data compression." @default.
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- W2241660112 title "BIT-SERIAL PARALLEL PROCESSING VLSI ARCHITECTURE FOR A BLOCK MATCHING MOTION ESTIMATION ALGORITHM" @default.
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