Scanning line interpolating apparatus and motion vector detectin

Details Scanning line interpolating apparatus and motion vector detectin Scanning line interpolating apparatus and motion vector detectin

1995-10-31

1997-04-08

Kostak, Victor R.

Television

Format conversion

Line doublers type

348458, H04N 701

Patent

active

056192738

ABSTRACT:
An scanning line interpolating apparatus generates interpolation signals when scanning lines are not included in video signals are formed by interpolation, by adaptively mixing intra-picture interpolation signals formed with upper and lower scanning lines apart from scanning lines to be interpolated and inter-picture interpolation signals formed with pictures before and after the scanning lines to be interpolated. Inter-picture matching signals are obtained between the pictures and used to generate the inter-picture interpolation signals. Low frequency component difference signals are obtained between the intra-/inter-picture interpolation signals. In-and-out matching signals are obtained by obtaining an absolute value of or by squaring the difference signals. An adaptive mixture ratio is varied between the intra-/inter-picture interpolation signals with a signal obtained by adding the matching signals. An motion vector detecting apparatus generates motion vectors for interpolating scanning lines by compensating motions of pictures before and after scanning lines to be interpolated with vector values in an search area, to select motion vectors with the compensated results.

REFERENCES:
patent: 4984077 (1991-01-01), Uchida
patent: 5181111 (1993-01-01), Hedley et al.

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