Prediction and coding of bi-directionally predicted video object

Details Prediction and coding of bi-directionally predicted video object Prediction and coding of bi-directionally predicted video object

1997-10-06

1999-11-23

Tadayon, Bijan

Image analysis

Image compression or coding

Interframe coding

382238, G06K 900

Patent

active

059914475

ABSTRACT:
A system for coding of digital video images such as bi-directionally predicted video object planes (B-VOPs), in particular, where the B-VOP and/or a reference image used to code the B-VOP is interlaced coded. For a B-VOP macroblock which is co-sited with a field predicted macroblock of a future anchor picture, direct mode prediction is made by calculating four field motion vectors, then generating the prediction macroblock. The four field motion vectors and their reference fields are determined from (1) an offset term of the current macroblock's coding vector, (2) the two future anchor picture field motion vectors, (3) the reference field used by the two field motion vectors of the co-sited future anchor macroblock, and (4) the temporal spacing, in field periods, between the current B-VOP fields and the anchor fields. Additionally, a coding mode decision process for the current MB selects a forward, backward, or average field coding mode according to a minimum sum of absolute differences (SAD) error which is obtained over the top and bottom fields of the current MB.

REFERENCES:
patent: 5510857 (1996-04-01), Kopet et al.
patent: 5691771 (1997-11-01), Oishi et al.
patent: 5740340 (1998-04-01), Purcell et al.
patent: 5761398 (1998-06-01), Legall
patent: 5786860 (1998-07-01), Kim et al.
patent: 5793895 (1998-08-01), Chang et al.
patent: 5801778 (1998-09-01), Ju
patent: 5809270 (1998-09-01), Robbins
patent: 5815646 (1998-09-01), Purcell et al.
patent: 5825931 (1998-10-01), Owada et al.

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