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R-Q Modeling for H.264/AVC Rate Control

H.264/AVC 비트율 제어를 위한 R-Q 모델링

  • 박상현 (순천대학교 멀티미디어공학과)
  • Received : 2013.07.05
  • Accepted : 2013.09.23
  • Published : 2013.09.30

Abstract

The first frame of a GOP, an I frame, is encoded in intra mode which generates a larger number of bits. In addition, the I frame is used for the inter mode encoding of the following frames. Thus the intial QP for the I frame affects the first frame as well as the following frames. In our previous work, we analyzed the number of bits for an I frame and showed that the ratio of the number of bits which maximizes the PSNR of a GOP maintains similar value regardless of GOP's. In this paper, we propose a R-Q model which can be used for the calculation of the initial QP given the amount of bits for an I frame. The proposed model is simple and adaptively modifies model parameters, so it can be applicable to the real-time application. It is shown by experimental results that the proposed model captures initial QP characteristics effectively and the proposed method for model parameters accurately estimates the real values.

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