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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Lin Sun Au, O.C. Zhao, C. Huang, F.H. |
| Copyright Year | 2014 |
| Description | Author affiliation: ABN Impact, China (Huang, F.H.) || Dept. of Electron. & Comput. Eng., Hong Kong Univ. of Sci. & Technol., Hong Kong, China (Lin Sun; Au, O.C.) || Hong Kong Branch, Lenovo Corp. Res., Hong Kong, China (Zhao, C.) |
| Abstract | This paper explores a novel rate control scheme for HEVC, based on Pre-analysis Sum of Absolute Transformed Differences (pSATD). The needs for improving the rate control method of HEVC have been observed since the latest method proposed in JCT-VC H213 is still using the classical quadratic model which is implemented in H.264/AVC. The same rate control scheme on different coding structures will definitely lead to a poor performance. The proposed method aims at selecting accurate quantization parameters (QP) for inter frames according to the target bit rate. After encoding video sequences exhaustively, a strong linear relationship between the pSATD and bpp (bit per pixel) is revealed. Thus, a rate control scheme for HEVC with parameters updating adaptively is proposed accordingly. Apart from that, a new rate and distortion model are established using pSATD and Quantization Step Size (QStep). By minimizing the cost function built based on the proposed rate-distortion (R-D) model, the optimization problem can be solved properly. According to the optimal solution, a bit allocation scheme with consideration of pSATD and buffer status is formed. The experimental results illustrate that the proposed method outperforms JCT-VC H213 implemented in HEVC reference software for all test sequences, up to 19% coding gain can be achieved. |
| Sponsorship | IEEE Circuits Syst. Soc. |
| Starting Page | 1933 |
| Ending Page | 1936 |
| File Size | 244684 |
| Page Count | 4 |
| File Format | |
| e-ISBN | 9781479934324 |
| DOI | 10.1109/ISCAS.2014.6865539 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 2014-06-01 |
| Publisher Place | Australia |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Encoding Bit rate Adaptation models Video coding Quantization (signal) Curve fitting Computational modeling HEVC pSATD Rate Model Distortion Model adaptive rate control |
| Content Type | Text |
| Resource Type | Article |
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