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Wireless visual sensor networks are potentially applicable for several emerging applications. Since the resource-limited restriction for a visual sensor node (VSN), efficient resource allocation for video compression is challenging. In this paper, a power-rate-distortion (PRD) model-based low-complexity multiview video codec is proposed. Our PRD model is used to characterize the relationship between...
Low-complexity video encoding has been applicable to several emerging applications. Recently, distributed video coding (DVC) has been proposed to reduce encoding complexity to the order of that for still image encoding. In addition, compressive sensing (CS) has been applicable to directly capture compressed image data efficiently. In this paper, by integrating the respective characteristics of DVC...
In traditional video compression standards, the quantizer plays an important role. It is the same for the distributed video coding (DVC), which can be thought to consist of a quantizer followed by a Slepian-Wolf encoder. The quantizer has dominant effect on the quality of the reconstructed video. In this context, this paper proposes quantization scheme for DVC based on a modified Lloyd-Max algorithm...
Nowadays, with the growing of multimedia applications, requirement for embedded multimedia system becomes popular. The implementation of a multi-model video encoder is introduced, which is composed of DSP (digital signal processor) and FPGA (field programmable gate array). The FPGA complete some auxiliary tasks, such as video acquisition and YUV separation, while the DSP is dedicated for video compression...
Video data security is very important for multimedia commerce such as video-on-demand and real-time video multicast. Nowadays, many video encryption methods have been put forward. This paper presents a new kind of video encryption approach that based on the syntax character of compressed digital video bitstreams. Using this approach, we can shuffle the critical data blocks in each video frame with...
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