Region-of-interest based rate control for UAV video coding
| Autor: | Chun-lei Zhao, Jing-ying Xiong, Ming Dai |
|---|---|
| Rok vydání: | 2016 |
| Předmět: |
Pixel
Computer science business.industry Quantization (signal processing) Real-time computing ComputingMethodologies_IMAGEPROCESSINGANDCOMPUTERVISION Rate control 020206 networking & telecommunications 02 engineering and technology Condensed Matter Physics Atomic and Molecular Physics and Optics Electronic Optical and Magnetic Materials Region of interest Robustness (computer science) 0202 electrical engineering electronic engineering information engineering Bit allocation 020201 artificial intelligence & image processing Computer vision Artificial intelligence Electrical and Electronic Engineering business Encoder Coding (social sciences) |
| Zdroj: | Optoelectronics Letters. 12:216-220 |
| ISSN: | 1993-5013 1673-1905 |
| DOI: | 10.1007/s11801-016-6052-z |
| Popis: | To meet the requirement of high-quality transmission of videos captured by unmanned aerial vehicles (UAV) with low bandwidth, a novel rate control (RC) scheme based on region-of-interest (ROI) is proposed. First, the ROI information is sent to the encoder with the latest high efficient video coding (HEVC) standard to generate an ROI map. Then, by using the ROI map, bit allocation methods are developed at frame level and large coding unit (LCU) level, to avoid inaccurate bit allocation produced by camera movement. At last, by using a better robustness R-λ model, the quantization parameter (QP) for each LCU is calculated. The experimental results show that the proposed RC method can get a lower bitrate error and a higher quality for reconstructed video by choosing appropriate pixel weight on the HEVC platform. |
| Databáze: | OpenAIRE |
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