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The new video coding standard: High Efficiency Video Coding (HEVC)/H265 developed by ISO-IEC/MPEG and ITU-T/VCEG, has a goal to improve compression performance over the current H264/MPEG-4 standard, in the range of 50% bit-rate reduction for equal perceptual video quality. However the complexity of the algorithm and data structure of H265 is much higher than H264, that means H265 based codec will...
A 2D intra prediction with geometrical manipulations (2DIP) was proposed in [Yai, et al; 2008 ] to enhance the intra coding performance of H.264/AVC. However, the complexity of 2DIP is high if the full search scheme is used. In this work, we investigate ways to speed up the intra prediction mode decision for 2DIP. To achieve this, we first conduct a block correlation analysis that reveals the unique...
A lossless video compression scheme is proposed based on residual image prediction and coding (RIPC) in this work. We first study different prediction schemes used in lossless coding, and observe that prediction residuals are not white but in form of granular noise. This study reveals a need to treat residual images with granular noise carefully. Then, we propose a new scheme, called RIPC, to encode...
An intra prediction (IP) scheme based on 2D geometrical manipulation, called 2DIP, was proposed in to improve the line-based intra prediction (LIP) in H.264/AVC. In this work, we propose ways to reduce the complexity and enhance the efficiency of 2DIP and call the resultant scheme 2D enhanced intra prediction (2DEIP). These enhancements are achieved via block classification and translation vector...
A rate-distortion (RD) model for subpel motion vector (MV) selection is proposed for power-efficient video coding in this work. To reduce the encoder complexity, the block texture feature is used in the proposed RD model to predict the potential subpel MV gain for a given block. If the gain is not sufficiently large, we may choose integer or half-pel MV to save the search and interpolation cost at...
Video encoder is an important part of video network surveillance system, and its design goals include combining real time coding, high performance, low cost and flexible control with small size. To meet all these requirements, DSPs with video ports provide an ideal solution. In this paper, we've designed and implemented a Blackfin DSP-based, high performance, low cost, low power consumption, real...
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