Efficient Bitrate Control Scheme for Scalable Video Codec

Scalable Video Codec을 위한 효율적인 비트율 제어기법

  • Park Nae-Ri (Dept. of Information & Communications Engineering, Sejong University) ;
  • Jeon Dong-San (Broadcasting Media Research Group, ETRI) ;
  • Kim Jae-Gon (Broadcasting Media Research Group, ETRI) ;
  • Han Jong-Ki (Dept. of Information & Communications Engineering, Sejong University)
  • 박내리 (세종대학교 정보통신공학과) ;
  • 전동산 (한국전자통신연구원 디지털방송연구단) ;
  • 김재곤 (한국전자통신연구원 디지털방송연구단) ;
  • 한종기 (세종대학교 정보통신공학과)
  • Published : 2005.12.01

Abstract

In this paper, we propose a new bitrate control scheme to improve the quality of image encoded by SVC and to resolve the problems of conventional scheme. In JSVM2.0, bitrate of a frame is controlled by an initial quantization parameter and scaling factor that it hasdifferent value according to frame. Itis difficult to get the best of video quality at arbitrary bitrate because the conventional scheme has two defects. One is that we have to know proper initial QP's fur all sequences. Another is that QP's control skill for macroblocks is very inefficient. In this paper, we propose an efficient bit allocation algorithm to reduce the effect of the initial QP and to increase the efficiency of bit allocation by using proper QP's for macroblocks. In simulation results, it can be seen that using the proposed scheme enables the SVC encoder to control the bitrate by the macroblock unit and outperforms the conventional schemes in the respect of rate-distortion.

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