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This paper proposes a global rate control scheme to maximize the overall encoding quality of a network-based video composition system. The input video sources are encoded using HEVC. The rate-distortion function for each input video source is modelled based on the known PSNR and bitrates at two quantization points and the R-λ model in HEVC. By solving an R-D optimization problem, the proposed scheme...
This demonstrator illustrates the performance of our designated intra-frame video codec for low-resolution visual sensors. The encoder of the presented compression system runs on a low-power visual sensor, which captures stereo frames of 30×30 6-bit gray-scale pixels. A laptop computer is connected using a serial connection and runs the decoder in real-time, displaying the resulting visual quality,...
This paper proposes a low-complexity intra-frame video coding system for very low resolution sequences. The application focuses on power constrained wireless visual sensors, recording extremely low-resolution video, namely, 30×30 pixels. In the proposed framework, high-performance video coding techniques such as block-based transforms, intra prediction and entropy coding are employed. The proposed...
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