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Related Experiment Videos

Error concealment for shape in MPEG-4 object-based video coding.

Cheng Huang1, Paul Salama

  • 1NTIUS, Inc., Irvine, CA 92618, USA. chengh@ntius.com

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
|April 14, 2005
PubMed
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This study introduces a novel error concealment technique for MPEG-4 object-based video coding to reconstruct lost shape data in asynchronous transfer mode networks. The method uses global motion estimation for boundary recovery, minimizing visual impact from data loss.

Area of Science:

  • Computer Science
  • Electrical Engineering
  • Digital Signal Processing

Background:

  • Asynchronous Transfer Mode (ATM) networks are prone to cell loss and channel errors.
  • Data loss in digital images and videos transmitted over ATM networks necessitates robust error concealment techniques.
  • MPEG-4 object-based video coding requires effective methods for reconstructing lost shape information.

Purpose of the Study:

  • To present an effective error concealment technique for shape data in MPEG-4 object-based video coding.
  • To minimize the visual impact of data loss caused by cell loss or channel errors in ATM networks.
  • To enable accurate reconstruction of damaged video object planes' shapes.

Main Methods:

  • The proposed technique involves three main steps: boundary extraction from shape, boundary patching using global motion compensation, and boundary filling.

Related Experiment Videos

  • Global motion estimation and compensation are employed for accurate boundary recovery.
  • Global motion parameters are embedded within the USER_DATA field of the compressed stream.

    • Main Results:

    • The method successfully reconstructs the shape of damaged video object planes.
    • Error concealment based on global motion significantly minimizes the impact of data loss on visual quality.
    • Accurate recovery of object boundaries is achieved through the proposed patching and filling process.

    Conclusions:

    • The presented error concealment technique provides an efficient solution for shape data loss in MPEG-4 video.
    • Global motion estimation and compensation are effective for reconstructing lost shape information in object-based video coding.
    • This approach enhances the robustness of video transmission over error-prone networks like ATM.