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| Content Provider | IEEE Xplore Digital Library |
|---|---|
| Author | Ng, K.T. Chan, S.C. Ng, T.S. |
| Copyright Year | 1996 |
| Description | Author affiliation: Dept. of Electr. & Electron. Eng., Hong Kong Univ., Hong Kong (Ng, K.T.) |
| Abstract | In this paper, a new buffer control algorithm for motion-compensated hybrid DPCM/DCT coding (like H.261 and MPEG-1 I pictures) is presented. The algorithm uses the bit allocation algorithm to determine the quantization scale factor of each macroblock under a given target bit rate. An important advantage of the algorithm is that it has precise control of the buffer and avoids buffer overflow events which is a severe problem in low bit rate video coders. Furthermore, the coder is able to allocate bits to the picture as a whole, resulting in better rate-distortion trade-off. Simulation results show that the H.261 coder, using the proposed algorithm, can achieve a higher PSNR and better visual quality than a codec using a conventional buffer control algorithm. |
| Starting Page | 685 |
| Ending Page | 688 |
| File Size | 369326 |
| Page Count | 4 |
| File Format | |
| ISBN | 0780332598 |
| DOI | 10.1109/ICIP.1996.559591 |
| Language | English |
| Publisher | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Publisher Date | 1996-09-19 |
| Publisher Place | Switzerland |
| Access Restriction | Subscribed |
| Rights Holder | Institute of Electrical and Electronics Engineers, Inc. (IEEE) |
| Subject Keyword | Video compression Bit rate Motion control Discrete cosine transforms Transform coding Quantization Buffer overflow Rate-distortion PSNR Codecs |
| Content Type | Text |
| Resource Type | Article |
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