Very low bit rate video compression using MPEG-4 sprite coding

Kumi Jinzenji, Hiroshi Watanabe, Shigeki Okada, Naoki Kobayashi

    Research output: Contribution to journalArticle

    Abstract

    The new MPEG-4 image coding standard that has recently been established offers higher image quality in low-bit-rate coding than conventional coding methods such as H.26X, MPEG-1, and MPEG-2, as well as coding for each object unit (a new function). This paper proposes an algorithm for the automatic extraction of video objects consisting of a foreground object and a background sprite. It is based on "sprite coding," which can greatly reduce the number of code bits compared to conventional methods. The foreground and background video objects processed by the proposed method are subjected to MPEG-4 object coding and sprite coding, respectively, and are compared with MPEG-4 simple profile (normal) coding. In particular, the influence of the frame rate and the foreground object rate on the number of code bits was investigated. It was found that the proposed method can reproduce images with the same quality while using about one-fourth to one-half as many code bits as the normal coding method when the foreground rate is 10 to 15% of the whole image, regardless of the frame rate. In addition, the proposed method can attain more than double the frame rate of the normal coding method at a very low bit rate (e.g., 128 and 64 kbit/s) with a similar SNR.

    Original languageEnglish
    Pages (from-to)83-93
    Number of pages11
    JournalElectronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi)
    Volume86
    Issue number6
    DOIs
    Publication statusPublished - 2003 Jun

    Fingerprint

    video compression
    Image compression
    coding
    Image coding
    Image quality

    Keywords

    • MPEG-4
    • Object coding
    • Sprite
    • Very high image compression

    ASJC Scopus subject areas

    • Electrical and Electronic Engineering

    Cite this

    Very low bit rate video compression using MPEG-4 sprite coding. / Jinzenji, Kumi; Watanabe, Hiroshi; Okada, Shigeki; Kobayashi, Naoki.

    In: Electronics and Communications in Japan, Part II: Electronics (English translation of Denshi Tsushin Gakkai Ronbunshi), Vol. 86, No. 6, 06.2003, p. 83-93.

    Research output: Contribution to journalArticle

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