Temporal and spatial projection onto the convex set (POCS) based error concealment algorithm for the MPEG-encoded video sequence

Max Chien; Huifang Sun; Wilson Kwok

doi:10.1117/12.206711

21 April 1995 Temporal and spatial projection onto the convex set (POCS) based error concealment algorithm for the MPEG-encoded video sequence

Max Chien, Huifang Sun, Wilson Kwok

Author Affiliations +

Proceedings Volume 2501, Visual Communications and Image Processing '95; (1995) https://doi.org/10.1117/12.206711
Event: Visual Communications and Image Processing '95, 1995, Taipei, Taiwan

Abstract

The paper presents an algorithm attempting to combine both intra-frame and interframe information to reconstruct lost macroblocks due to imperfect communication channels when decoding a MPEG bitstream. The algorithm is a POCS-based (Projection Onto the Convex Set) iterative restoration algorithm incorporating both the temporal and spatial constraints derived from a set of analysis performed on the picture sequence. Often the use of the temporal information in the restoration process is complicated by the scene changes or large random motion activities. To reliably utilize the temporal information, we formulate a series of test to determine the usefulness of the temporal information. In addition, the tests yield a temporal constraint if the temporal information is deemed good. Along with the spatial constraints as described in [1], the temporal constraint is used in the proposed iterative restoration algorithm.

Citation Download Citation

Max Chien, Huifang Sun, and Wilson Kwok "Temporal and spatial projection onto the convex set (POCS) based error concealment algorithm for the MPEG-encoded video sequence", Proc. SPIE 2501, Visual Communications and Image Processing '95, (21 April 1995); https://doi.org/10.1117/12.206711

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