전자공학회논문지S (Journal of the Korean Institute of Telematics and Electronics S)

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

2차원 매크로블록의 평균 양자화를 이용한 비트율 제어

A bitrate control using average quantization of 2-D macroblocks

  • 임용순 (성균관대학교 전자공학과) ;
  • 이근영 (성균관대학교 전자공학과)
  • 발행 : 1998.03.01
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초록

In bitrate control of MPEG-2 TM5, $Q_{j}$, N-act, and mquant, of present macroblock are predicted from those of previous macroblock. It results in poor image quality because of abrups change of them. We proposed a method predicting $Q_{j}$, N-act, and mquant, of present macroblock by averaging those parameters of adjacent previous macroblocks. As a results, it shows improved PSNR compared to bitrate control of MPEG-2 TM5.TM5.

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