Video coding apparatus and video decoding apparatus with an impr

Television – Bandwidth reduction system – Data rate reduction

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Details

348699, 348402, 348407, 348409, 348412, 348413, 348415, H04N 732, H04N 730

Patent

active

057150052

ABSTRACT:
A motion picture coding and decoding apparatus divides each frame of a motion picture into a plurality of blocks and for providing a prediction error to each of the blocks between a target frame and a reference frame. A motion vector is coded for each block and stored for both the target frame and the reference frame. A differential motion vector is determined based upon the motion vector of the target frame and a corresponding block in the reference frame. The differential motion vector is then coded and multiplexed with the coded prediction error and output on a transmission path. The coded data is then decoded and the differential motion vector and a motion vector of a corresponding block from a reference frame can thereby be added to obtain a motion vector to be used for decoding the prediction error. Additionally, an error detection unit can detect the presence of an error in the coded differential motion vector, and a prevention unit can be used to prevent processing an erroneous differential motion vector, while an error amendment unit can substitute a motion vector of a predetermined block instead of the motion vector having the error.

REFERENCES:
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patent: 5126841 (1992-06-01), Tanaka et al.
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patent: 5400076 (1995-03-01), Iwamura
patent: 5442400 (1995-08-01), Sun et al.
"Resynchronization of Motion Compensated Video Affected by ATM Cell Loss", by P. Haskell et al., ICASSP-92, vol. 3, Mar. 1992, pp. 545-548.

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