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In this paper, a fast CU depth decision algorithm based on support vector machine (SVM) is proposed to reduce the computational complexity of HEVC intra coding. It is systematic to develop the criterion of early CU splitting and termination by applying SVM. Appropriate features for training SVM models are extracted from spatial domain and pixel domain. Artificial neural network is used to analyze...
This paper proposes a low power deblocking filter (DF) architecture with Horizontal Edge Skip Processing Architecture (HESPA) scheme that offers an intelligent edge skip aware mechanism in filtering the horizontal edges by adopting a four-stage pipeline and adaptive hybrid filtering order to boost the speed of DF process. The proposed architecture not only reduces more than 34% logic power consumption...
This paper proposes a fast inter-layer motion estimation algorithm on spatial scalability for scalable video coding extension of H.264/AVC. In the enhancement layer motion estimation, we utilize the relation between two motion vector predictors from the base layer and the enhancement layer respectively to reduce the number of searches. Additionally, we utilize the mode correlations of temporal direction...
This paper presents an efficient error concealment algorithm for video bitstream over error-prone channel suffering from damage. Moreover, hardware architecture design and chip implementation of the proposed error concealment algorithm are also presented. For spatial error concealment, a mode selection algorithm considering the reuse of intra mode information embedded in bitstream is developed for...
In this paper, we use video watermarking on H.264 video compressed, to reach protect for video data. In recent years, H.264 is a new advanced video compressed standard. It provides high compression efficiency and compress quality, digital data is easy to be altered. One of the most important things is to prevent the data to be illegally used. We propose a method is compare many corresponding AC coefficient,...
This paper proposes a novel framework called distributed compressed video sensing (DISCOS) - a solution for distributed video coding (DVC) based on the recently emerging compressed sensing theory. The DISCOS framework compressively samples each video frame independently at the encoder. However, it recovers video frames jointly at the decoder by exploiting an interframe sparsity model and by performing...
We propose a novel layered compressed sensing (CS) approach for robust transmission of video signals over packet loss channels. In our proposed method, the encoder consists of a base layer and an enhancement layer. The base layer is a conventionally encoded bitstream and transmitted without any error protection. The additional enhancement layer is a stream of compressed measurements taken across slices...
Systematic Lossy Error Protection (SLEP) is a robust error resilient mechanism which uses Wyner-Ziv coding to protect the video bitstream. In this paper, we propose a low overhead adaptive lossy error protection (ALEP) mechanism that provides a good trade-off between the error resilience and decoded video quality. The proposed method can generate appropriate redundant slices to provide proper error...
The proposed scheme of this paper is embedding watermark into intra frame (I-frame). The most challenge of watermark that embedded into intra frame is the selection of intra prediction might be changed. In the research, different AC coefficient gets different effect when the selection of intra prediction was changed in another compression course. Therefore, it's necessary that finding what AC coefficients...
In the advanced H.264 video coding, the computation complexity is much higher than the previous video coding standards due to the variable block size and multi-reference frame features which are used in the motion compensation process. This paper proposes a hierarchical H.264 fast motion estimation algorithm to decrease the coding complexity in both spatial and temporal domains for encoding high-definition...
This paper proposes a novel framework called Distributed Compressed Video Sensing (DISCOS) - a solution for Distributed Video Coding (DVC) based on the compressed sensing (CS) theory. The DISCOS framework compressively samples each video frame independently at the encoder and recovers video frames jointly at the decoder by exploiting an interframe sparsity model and by performing sparse recovery with...
The allowable computational complexity of video encoding is limited in a power-constrained system. Different video frames are associated with different motions and contexts, and so are associated with different computational complexities if no complexity control is utilized. Variation in computational complexity leads to encoding delay jittering. Typically motion estimation (ME) consumes much more...
In the paper, we propose a system that uses H.264 video compressed and semi-fragile video watermarking to reach video recording automatically. In recent years, H.264 is a new advanced video compressed standard. It provides high compression efficiency and compress quality, compress the standard for the video compressed of new generation. Digital data is easy to be altered. One of the most important...
We present an effective congestion and error control mechanism for scalable video coding (SVC) extension of the H.264/AVC video dissemination over Internet. The congestion control is used to determine the appropriate number of SVC video layers based on bandwidth inference congestion (BIC) control protocol for layered multicast scenarios and the error control is achieved by unequal forward error correction...
Error concealment techniques are widely used in video decoder with error-prone communication channels. In this paper, an enhanced edge-sensitive processing order for temporal error concealment algorithm is proposed. Side information of neighboring macroblocks of the corrupted macroblocks are considered to derive a suitable processing order for error concealment, and a new motion vector searching algorithm...
Error concealment technique can improve subjective video quality in decoder when the video bitstream is corrupted during transmission. In this paper, a new error concealment algorithm for I-frames is proposed. To achieve perceptually comfortable results, image inpainting algorithm is adopted with structure information generated from edge information. In addition, mixed spatial-temporal inpainting...
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