Rate control algorithm for H.264/AVC video coding standard based on rate-quantization model
| Autor: | Yo-Sung Ho, Seonki Kim |
|---|---|
| Rok vydání: | 2005 |
| Předmět: |
H.262/MPEG-2 Part 2
Image quality Computer science Quantization (signal processing) Tunstall coding ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Macroblock Variable-length code computer.file_format Coding tree unit Scalable Video Coding Coding gain Rate–distortion theory Computer Science::Multimedia Multiview Video Coding computer Algorithm Harmonic Vector Excitation Coding Context-adaptive binary arithmetic coding Context-adaptive variable-length coding |
| Zdroj: | ICME |
| DOI: | 10.1109/icme.2004.1394151 |
| Popis: | Rate control is an essential part of video coding algorithms, to maintain uniform picture quality for the given coding constraints. We propose a new rate control algorithm for the H.264 video coding standard. We derive a rate-quantization model from the rate-distortion function, based on the distribution of source data to be quantized. We also classify macro-blocks in each frame into three groups according to their characteristics, and decide the quantization parameter for each macroblock. Experimental results show that the proposed scheme generates coding bits very close to target bits and provides improved coding efficiency at low bit rates. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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