Advanced JPEG bit rate control for the mobile multimedia device

이동형 멀티미디어 기기를 위한 개선된 JPEG 비트율 조절 알고리즘

  • 양윤기 (수원대학교 정보통신공학과) ;
  • 이창수 (수원대학교 전자공학과) ;
  • 김진율 (수원대학교 전자공학과)
  • Received : 2008.01.02
  • Accepted : 2008.04.04
  • Published : 2008.05.31

Abstract

Typically, the file sizes of JPEG compressed images with various complexity differ from images regardless of same image size. So, it is not easy to estimate the remaining image counts that should be stored in the limited storage equipped with the digital camera. To solve the problem, the bit rate control employs the modification of quantization table. The previous work assumed that there is linear relation between image activity and modification factor of quantization table, but in this paper, more accurate functional relations based on statistics are employed to improve the bit rate control accuracy. Computer simulations reveals that the standard deviation of the bit rate error of the proposed scheme is 50% less than that of the conventional method.

Acknowledgement

Grant : 차세대 모바일 멀티미디어 플랫폼 핵심기술 개발

Supported by : 정보통신연구진흥원