Error concealment apparatus for HDTV receivers

Details Error concealment apparatus for HDTV receivers Error concealment apparatus for HDTV receivers

1992-03-02

1993-09-21

Britton, Howard W.

Facsimile and static presentation processing

Facsimile

Specific signal processing circuitry

358105, 358336, H04N 521

Patent

active

052473635

ABSTRACT:
Image reproduction is improved in an MPEG-like television receiver by inclusion of post-processing adaptive error concealment. Compressed video signal is examined to determine blocks of video signal containing errors, and error tokens are generated for identifying corresponding blocks of decompressed pixel values. Pixel values adjacent the decompressed blocks of pixel values containing errors are examined to generate estimates of the relative image motion and image detail in the area of such blocks. The block of pixel values is replaced with temporally displaced co-located blocks of pixel values or interpolated data depending upon whether the estimate of image motion is lesser or greater than the estimate of image detail.

REFERENCES:
patent: 4021852 (1977-03-01), Hurst et al.
patent: 4232340 (1980-04-01), Fuhrer
patent: 4792953 (1988-12-01), Pasdera
patent: 4807033 (1989-02-01), Keesen
patent: 5003541 (1991-03-01), Mester
patent: 5122875 (1992-06-01), Raychaudhuri
ISO-IEC JTC1/SC2/WG11; Coding of Moving Pictures and Associated Audio; MPEG 90/176 Rev. 2, Dec. 18, 1990.

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