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Multiple intra-mode prediction is one of the new features introduced in the emerging video standard, H.264/AVC. Its function is to further reduce spatial redundancies in an intracoded macroblock prior to conventional transform coding and entropy coding. However, the process is computationally expensive especially when Lagrangian cost evaluation is employed. In this paper, we propose a fast algorithm...
Intra prediction coding is mainly to eliminate the correlation of the spatial domain. Firstly the article introduces the traditional intra prediction algorithm. And then according to the correlation between the most likely patterns and best mode, It draws a pattern matrix. By the advantage of this mode matrix for early termination, it can improve the efficiency of intra prediction 9%–15% in the condition...
This paper presents a fast intra mode decision algorithm using the sum of absolute transformed differences (SATD) in order to reduce the encoding time. Our algorithm consists of two main techniques: Early block-mode decision and candidate directional-mode selection. First, we use the early block-mode decision method, I4MB skip, to avoid unnecessary computation for I4MB. If all the 16 4x4sub-blocks...
Of the digital video compact coding technology, the technology of motion estimation and motion recovery, which is based on the block match, is adopted to eliminate the redundant data between the contiguous frames of the video sequence. In this paper, the minimal average absolute differences match method and the smooth constrained minimal average absolute differences match algorithm are improved, yielding...
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...
The newly proposed video coding standard H.264/AVC by JVT can achieve much higher efficiency than previous standards. Unfortunately this comes at a cost in greatly increased complexity at the encoder mainly due to motion estimation (ME) and inter /intra prediction block mode decision. In this paper, we propose a fast mode decision algorithm for H.264/AVC based on all-zero blocks predetermination....
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...
Block-based discrete cosine transform is widely used in many video coding standards includes H.264. Due to the property of the discrete cosine transform, it usually introduces annoying blockiness artifacts in the reconstructed video. H.264 uses an adaptive in-loop deblocking filter to reduce the blockiness artifacts. This paper introduces an algorithm for the deblocking filter in H.264. The proposed...
Distributed video coding (DVC) technology is investigated and payed more and more attentions in wireless video applications because of characteristics of its encoder with low-complexity and decoder with high-complexity. Its coding types can be sorted the key and Wyner-Ziv frames, key frames are with conventional intra-coding mode, Wyner-Ziv frames are coded by an encoder that is composed of quantizer...
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