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This paper presents a lossless sensor data compression accelerator for power reduction in wireless body sensors. First, a low complexity compression algorithm is demonstrated for the first time on electrocardiogram (ECG) and acceleration sensor data. Second, the algorithm is implemented as a custom hardware accelerator on a health monitoring driven System on Chip (SoC) in a 130 nm process. The accelerator...
H.264 is most likely the future standard for the web-based applications of video streaming and browsing. The block motion estimation process is a very time consuming part in the H.264 video coding standard and thus hinders its real-time applications. Therefore, a new fast block motion estimation algorithm is proposed in this paper. In this algorithm, it first determines the current block as a quasi-stationary,...
The UMHexagonS algorithm has been accepted for the block motion estimation process in the H.264 video coding standard due to its high accuracy and low computational requirement. In this paper, a new algorithm is proposed, which improves on the UMHexagonS algorithm in three aspects. Firstly, a new prediction vector is added for avoiding being trapped in a local minimum. Secondly, the 5×5 full-search...
The block motion estimation process is a very time consuming part in the H.264 video coding standard and thus hinders its real-time applications. Therefore, a new fast block motion estimation algorithm is proposed in this paper. In this algorithm, it first determines the current block as a quasi-stationary, slow motion, or fast motion block. Then, according to the different motion types, different...
The UMHexagonS algorithm has been accepted for the possible implementation of the block motion estimation process in the H.264 video coding standard due to its high accuracy and low computational requirement. In this paper, a new algorithm is proposed, which improves on the UMHexagonS algorithm in three aspects. Firstly, a new prediction vector is added for avoiding being trapped in a local minimum...
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