Proceedings of the IEEK Conference (대한전자공학회:학술대회논문집)

The Institute of Electronics and Information Engineers (대한전자공학회)
권호 표지

The Design of DWT Quantizer to Improve the H.263

H-263 성능 개선을 위한 DWT 양자화기 설계

  • 이용식 (원광대학교 전자공학과) ;
  • 정상연 (원광대학교 전자공학과) ;
  • 심우성 (원광대학교 전자공학과) ;
  • 허도근 (원광대학교 전자공학과)
  • Published : 1999.06.01
Download PDF
⟨ Previous Next ⟩

Abstract

TMN5 used to test the performance of H.263 is a DCT-based H.263 which DCT is used as transform coding, but DWT is used instead of DCT and adaptive quantizer of being appropriate to DWT is designed in this paper while the structure of TMN5 is maintained. DWT-based H.263, which is proposed in this paper, is excellent in transplantation of the existing system and can improve frame rate by transmitting more Frame. Also, the average PSNR, objective quality of image, has been lost at degree of average 0.35㏈ in luminance signals, but has been improved over a average of 2㏈ in chrominance signals. Subjective quality of image has been improved as blocking effect, which has seriously occurred in DCT based H.263, is diminished. DWT-based H.263 can. therefore. advance video quality of image comparing with the existing ways.

Keywords