Title :
Joint power allocation and rate control for real-time video transmission over wireless systems
Author :
Li, Dongdong ; Sun, Yu ; Feng, Zhidan
Author_Institution :
Dept. of Electr. Eng., Texas Univ., Arlington, TX
Abstract :
We propose a novel rate control algorithm for real-time video transmission over wireless systems, which encompass power control technique, region-based rate control strategy and a macroblock-based segmentation method. By allocating more power as well as more bits to the regions of interest of a video frame and less power & fewer bits to the rest regions, the algorithm improves the visual quality of the regions of interest while saving bits, and also adapts to time-varying wireless channels. When compared with the fixed power MPEG-4 rate control algorithm, the proposed algorithm successfully improves perceptual quality, reduces frame skipping and enhances motion continuity in wireless video transmission, while the total power is kept at the original level
Keywords :
3G mobile communication; power control; telecommunication control; time-varying channels; video communication; wireless channels; macroblock-based segmentation method; power allocation; power control technique; real-time video transmission; region-based rate control strategy; time-varying wireless channels; wireless systems; Automatic repeat request; Bandwidth; Bit rate; Centralized control; Control systems; MPEG 4 Standard; Power control; Real time systems; Throughput; Video compression;
Conference_Titel :
Global Telecommunications Conference, 2005. GLOBECOM '05. IEEE
Conference_Location :
St. Louis, MO
Print_ISBN :
0-7803-9414-3
DOI :
10.1109/GLOCOM.2005.1578047