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

Ramin Ghaznavi Youvalari, Alireza Aminlou, Miska M. Hannuksela, Moncef Gabbouj

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

    18 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Title of host publication2016 IEEE International Symposium on Multimedia (ISM)
    PublisherIEEE
    Pages525-528
    Number of pages4
    ISBN (Electronic)9781509045709
    DOIs
    Publication statusPublished - 18 Jan 2017
    Publication typeA4 Article in a conference publication
    EventIEEE International Symposium on Multimedia -
    Duration: 1 Jan 1900 → …

    Conference

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

    Keywords

    • Pseudo-cylindrical panorama
    • Video coding
    • Virtual reality

    Publication forum classification

    • Publication forum level 1

    ASJC Scopus subject areas

    • Artificial Intelligence
    • Computer Networks and Communications
    • Media Technology
    • Computer Science Applications

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