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

Kumi Jinzenji*, Hiroshi Watanabe, Shigeki Okada, Naoki Kobayashi

*Corresponding author for this work

    Research output: Chapter in Book/Report/Conference proceedingConference contribution

    10 Citations (Scopus)


    This paper focuses on the "sprite coding" that supports the MPEG-4 Version 1 Main profile in order to transfer "near VHS quality video " across narrow-band transmission links such as the Internet. Automatic VOP (Video Object Plane) generation technologies are being studied as one of the most important issues of MPEG-4 object coding. This paper proposes a two-layer VOP generation scheme with some core algorithms such as GME (Global Motion Estimation), foreground moving object extraction, and background sprite generation. This paper also describes a shape information reduction method for the foreground object. The foreground object is object-coded in the, while the background sprite is coded using sprite coding in MPEG-4. We call this coding scheme "sprite mode"; MPEG-4 simple profile coding is called "normal mode". Experiments are conducted on VOP generation and video coding with MPEG-4. We compare sprite mode to normal mode. The coding efficiency of sprite mode is several times higher than that of normal mode at the same objective image quality if the foreground ratio is within 10-15%. Given the target of very low bitrate (128kbps, 64kbp) rate coding, sprite mode achieved almost the same SNR but more than twice the frame rate compared to normal mode.

    Original languageEnglish
    Title of host publicationProceedings - IEEE International Conference on Multimedia and Expo
    PublisherIEEE Computer Society
    Number of pages4
    ISBN (Print)0769511988
    Publication statusPublished - 2001
    Event2001 IEEE International Conference on Multimedia and Expo, ICME 2001 - Tokyo, Japan
    Duration: 2001 Aug 222001 Aug 25


    Other2001 IEEE International Conference on Multimedia and Expo, ICME 2001

    ASJC Scopus subject areas

    • Computer Networks and Communications
    • Computer Science Applications


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