A Lagrangian optimized rate control algorithm for the H.264/AVC encoder
The H.264/AVC video coding standard has been recently presented by the Joint Video Team of ITU-T and MPEG experts. The AVC encoder achieves video bitstreams at the same quality as the previous standard coders, while requiring typically 50% of the bit rate. This paper proposes a Lagrangian optimized...
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| creator | Ghandi, M.M. Ghanbari, M. |
| description | The H.264/AVC video coding standard has been recently presented by the Joint Video Team of ITU-T and MPEG experts. The AVC encoder achieves video bitstreams at the same quality as the previous standard coders, while requiring typically 50% of the bit rate. This paper proposes a Lagrangian optimized rate control algorithm for the H.264/AVC video encoder. It controls the bit rate by adjusting the Lagrangian multiplier for every picture and specifying the quantizer parameter for every macroblock. In the proposed method, the accuracy of desired bit rate is tunable by allocating more searching time to the encoder. Experimental results show that the proposed method gives a quality improvement of about 0.5 dB when compared to the rate control method utilized in the JM7.4 test model, with an acceptable encoder complexity. |
| doi_str_mv | 10.1109/ICIP.2004.1418705 |
| format | Conference Proceeding |
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Experimental results show that the proposed method gives a quality improvement of about 0.5 dB when compared to the rate control method utilized in the JM7.4 test model, with an acceptable encoder complexity.</description><subject>Applied sciences</subject><subject>Artificial intelligence</subject><subject>Automatic voltage control</subject><subject>Bit rate</subject><subject>Computer science; control theory; systems</subject><subject>Encoding</subject><subject>Exact sciences and technology</subject><subject>Lagrangian functions</subject><subject>Optimization methods</subject><subject>Pattern recognition. Digital image processing. 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| ispartof | 2004 International Conference on Image Processing, 2004. ICIP '04, 2004, Vol.1, p.123-126 Vol. 1 |
| issn | 1522-4880 2381-8549 |
| language | eng |
| recordid | cdi_pascalfrancis_primary_17611381 |
| source | IEEE Electronic Library (IEL) Conference Proceedings |
| subjects | Applied sciences Artificial intelligence Automatic voltage control Bit rate Computer science control theory systems Encoding Exact sciences and technology Lagrangian functions Optimization methods Pattern recognition. Digital image processing. Computational geometry Quadratic programming Rate-distortion Software testing Systems engineering and theory Video coding |
| title | A Lagrangian optimized rate control algorithm for the H.264/AVC encoder |
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