Enhanced SAITD Cost Function for H.264/AVC Intra 4×4 Mode Decision
نویسندگان
چکیده
In this paper, an enhanced sum of absolute integer transform difference (ESAITD) cost function with rate predictor “sum of non-zero coefficient frequencies” from CAVLC-based rate estimation is proposed for Intra_4x4 mode decision in H.264/AVC. This rate predictor is using simple but significant parameter to approximate the total encoded bitrate accurately. Experimental results show that ESAITD achieves much better rate-distortion (RD) performance than sum of absolute Hadamard transform difference (SATD) cost function. It also outperforms sum of absolute integer transform difference (SAITD) cost function in medium and high bitrate. Overall, ESAITD can encode the sequences with high quality.
منابع مشابه
Enhanced SATD-based cost function for mode selection of H.264/AVC intra coding
In H.264/AVC, the concept of rate-distortion optimization (RDO) mode decision has proven to be an important coding tool. However, this mode decision method makes the encoding process extremely complex, especially in the computation of the rate-distortion cost function, which includes the computations of the sum of squared difference (SSD) between the original and reconstructed image blocks and ...
متن کاملRelative SAD-based Inter Mode Decision Algorithm for H.264/AVC Video Standard
In this paper, a new relative sum of absolute difference (RSAD) based inter mode decision algorithm is proposed for H.264/AVC video standard. The main idea is to determine the best inter mode based on RSAD cost instead of the rate-distortion cost. This approach can avoid most of the computationally intensive processes in the H.264/AVC mode decision, such as integer transform, quantization, vari...
متن کاملFast Intra Mode Decision Using DCT Coefficient Distribution in H.264/AVC
The rate-distortion optimization (RDO) method in the H.264/AVC encoder is an informative technology that improves the coding efficiency, but increases the computational complexity. In this letter, a fast Intra mode decision algorithm using DCT (Discrete Cosine Transform) coefficients distribution is proposed to reduce the H.264 encoder complexity. The proposed method reduces the encoder complex...
متن کاملFast Mode Decision for H.264/AVC Encoder Based on Interblock Correlation
The up-to-date video coding standardH.264/AVC could achieve higher encoding performance compared with previous versions since it employs many tools to increase the coding accuracy, particularly the rate-distortion optimization technique for mode decision. However, an extremely high computational complexity isproduced because all possible combinations of modes are calculated in order to find the...
متن کاملEfficient MPEG-2 to H.264/AVC Transcoding of Intra-Coded Video
This paper presents an efficient transform-domain architecture and corresponding mode decision algorithms for transcoding intra-coded video fromMPEG-2 to H.264/AVC. Low complexity is achieved in several ways. First, our architecture employs direct conversion of the transform coefficients, which eliminates the need for the inverse discrete cosine transform (DCT) and forward H.264/AVC transform. ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 2010