상세정보
학술대회
Distortion Estimation in CBR Channel and Its Application for H.264 Rate Control
- 발행일
- 200806
- 출처
- International Conference on Multimedia and Expo (ICME) 2008, pp.689-692
- 협약과제
- 08MR4600, 유무선 환경의 개방형 IPTV(IPTV 2.0) 기술개발, 황승구
- 초록
- When a video sequence is compressed with rate control for a constant bit rate (CBR) channel, the visual quality usually fluctuates according to image complexity. We introduced distortion models under the CBR condition to predict distortion during rate control. The paper also proposes a control method for improvement of visual quality in H.264 CBR condition. In the experiments, we analyzed the peak signal-to-noise ratio (PSNR), the variance of the PSNR, and the average difference of the PSNR between adjacent frames for various video sequences. Our method demonstrates a more stable visual quality without severe PSNR degradation. © 2008 IEEE.
- KSP 제안 키워드
- Constant bit rate, Distortion estimation, Image complexity, Peak-Signal-to-Noise-Ratio(PSNR), Rate Control, Signal noise ratio(SNR), Visual Quality, control method, video sequences