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In this paper, we present a simple but efficient algorithm for intra prediction mode decision in H.264/AVC. Based on our investigation, the DC mode appears to be the superior prediction mode among various candidates. We propose an intra-mode decision algorithm where the DC mode is chosen as a candidate for the best prediction mode. Our experimental results show that the proposed algorithm saves 80...
H.264/AVC is the newest video coding standard with high compression efficiency. Especially it adopts traveling algorithm to find the optimal mode for intra-frame prediction in spatial field, so it is quite complex and costs very long encoding-time. In this paper, the proposed fast mode decision scheme consists of two parts: early intra mode detection, which is to select intra 4×4 or intra 16×16 mode...
This paper proposes an efficient zero-block inter mode decision algorithm for high bit-rate coding in H.264/AVC, to improve computation efficiency of the previous algorithm [1]. In the proposed algorithm we suggest using zero-blocks of both 8×8 and 4×4 DCT coefficients to describe video sequences in detail, including global and local stationary characteristics. The experimental results reveal that...
In order to get a balance of compression quality, compression ratio and time efficiency, we exploit JPEG_LS prediction and context-based encoding, and propose another linear prediction and run length code model. And we give an innovative compression algorithm design to evaluate the performance of our proposed scheme. We present the compression results using a large number of images compared with JPEG_LS...
Research on inter-prediction algorithms is an important respect in the real-time video codec technology. In the regarded studies, the prediction error can be reduced by incorporating high accuracy estimation and compensation algorithms. So the performance of compressed video can be improved. However, this brings a considerable cost for the complexity of encoder. The computation complexity is mainly...
Motion estimation is one of the key technologies in inner-frame estimation encoding of video compression. In all kinds of compression standard, motion estimation based on block is used widely. The H.264 was a kind of new generation video compression standard. In order to reduce the computational complexity of the motion estimation and improve the accuracy of motion compensation, a new search algorithm...
In this paper, an integer pixel search algorithm based on prediction (PIS) is proposed. The primary characteristic of this algorithm is using quadrangle and flat hexagon as search pattern. To strengthen the flexibility and precision of this algorithm, early termination strategy is adopted. And to prove the validity of the PIS algorithm, besides some theories and computation analysis, several experiments...
Intra coding in H.264/AVC has significantly enhanced the video compression efficiency. However, computation complexity increases by the rate-distortion (RD) based mode decision. This paper proposes a fast block type decision algorithm which can reduce intra predictionpsilas computation complexity with slight PSNR reduction. This algorithm is based on the relation of smoothness of macroblocks (MBs)...
H.264 is the currently state-of-the-art video compression standard performing significant improvement in coding efficiency and quality compared to other existing standard, such as MPEG-4 and H.263. The standard adapts a lot of novel techniques, like intra prediction, inter prediction and integer DCT(integer discrete cosine transform), to exploits high operational complexity for reducing spatial and...
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