吉林大学学报(工学版) ›› 2013, Vol. 43 ›› Issue (增刊1): 173-176.

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An improved filtering algorithm for H.264 fractional-pel interpolation

WANG Gang1,2, CHEN He-xin1, CHEN Mian-shu1, LIU Yuan-yuan1,3, SANG Ai-jun1   

  1. 1. School of Communication Engineering, Jilin University, Changchun 130022, China;
    2. School of Mechanical Engineering, Baicheng Normal College, Baicheng 137000, China;
    3. School of Information Technology, Jilin Agricultural University, Changchun 130118, China
  • Received:2012-06-04 Published:2013-06-01

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Abstract:

In order to reduce computational complexity and memory access store of H.264 fractional-pel interpolation,an improved filtering algorithm for fractional-pel interpolation was proposed, in which the filter coefficients are variable and the sum of all the coefficients is unchanged.Based on the fractional pixel interpolation algorithm for motion compensation in current video coding standard H.264,it determined filtering coefficients according to the variation of the motion vector.Compared to the algorithm in H.264,18% spatial complexity was reduced,computation complexity was about the same.The experimental results show that the PSNR is increased and the Bit-rate is decreased by the improved filtering algorithm and show the coding efficiency is enhanced.

Key words: H.264, fractional-pel, interpolation, peak signal-to-noise ratio(PSNR), bit-rate

CLC Number: 

  • TN919.81

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