Tampere University of Technology

TUTCRIS Research Portal

Efficient coding of 360-degree pseudo-cylindrical panoramic video for virtual reality applications

Research output: Chapter in Book/Report/Conference proceedingConference contributionScientificpeer-review


Original languageEnglish
Title of host publication2016 IEEE International Symposium on Multimedia (ISM)
Number of pages4
ISBN (Electronic)9781509045709
Publication statusPublished - 18 Jan 2017
Publication typeA4 Article in a conference publication
EventIEEE International Symposium on Multimedia -
Duration: 1 Jan 1900 → …


ConferenceIEEE International Symposium on Multimedia
Period1/01/00 → …


Pseudo-cylindrical panoramas represent the data distribution of spherical coordinates closely in two-dimensional domain due to the equidistant sampling of 360-degree scene. Therefore, unlike the cylindrical projections, they do not suffer from the over stretching in the polar areas. However, due to the non-rectangular format in effective picture area and sharp edges at its borders, the compression performance is inefficient. In this paper, we propose two methods which improve the compression performance of both intra-frame and inter-frame coding of pseudo-cylindrical panoramic content and meanwhile reduce the coding artifacts. In the intra-frame coding method, border edges are smoothed by modifying the content of the image in the non-effective picture area, which are cropped at the receiver side. In the inter-frame coding method, gaining the benefit of 360-degree property of the content, non-effective picture area of reference frames at border is filled with the content of the effective picture area from the opposite border to enhance the performance of motion compensation.


  • Pseudo-cylindrical panorama, Video coding, Virtual reality

Publication forum classification

Field of science, Statistics Finland