Improve Compression Efficiency of 360degree VR Video by Correcting Perspective in Cubemap Projection

Cubemap Projection 360도 VR 비디오에서 시점 보정을 통한 압축 효율 향상 방법

  • 윤성재 (경희대학교 컴퓨터공학과) ;
  • 박광훈 (경희대학교 컴퓨터공학과)
  • Received : 2016.12.06
  • Accepted : 2016.12.30
  • Published : 2017.01.30


Recently, many companies and consumers has shown a lot of interest toward VR(Virtual Reality), so many VR devices such as HMD(Head mounted Display) and 360 degree VR camera are released on the market. Current encoded 360 degree VR video uses the codec which originally made for the conventional 2D video. Therefore, the compression efficiency isn't optimized because the en/decoder does not consider the characteristics of the 360 degree VR video. In this paper, we propose a method to improve the compression efficiency by using the reference frame which compensates for the distortions caused by characteristics the 360 degree VR video. Applying the proposed method we were able to increase the compression efficiency by providing better prediction.


  1. Chulhyun Kim, "A Comparative Study for Virtual Reality $360^{\circ}$ Contents Shooting Equipments Based on Real World", Journal of Broadcast Engineering Vol. 21, No. 5, Sep. 2016
  2. JongGyu Oh, YongJu Won, JinSub Lee, YongHwan Kim, JongHo Paik, JoonTae Kim, "Study of Development of Transmission Systems for Next-generation Terrestrial 4K UHD & HD Convergence Broadcasting", Journal of Broadcast Engineering Vol. 19, No. 6, Nov. 2014
  3. Y. He, B. Vishwanath, X. Xiu, Y. Ye, "AHG8: InterDigital's projection format conversion tool", JVET-D0021, Chengdu, Oct. 2016
  4. E. Alshina, J. Boyce, A. Abbas, Y. Ye, "JVET common test conditions and evaluation procedures for $360^{\circ}$ video", JVET-D1030, Chengdu, CN, Oct. 2016