Method and apparatus for deriving a video signal corresponding t

Details Method and apparatus for deriving a video signal corresponding t Method and apparatus for deriving a video signal corresponding t

1994-09-28

1996-03-19

Kostak, Victor R.

Television

Bandwidth reduction system

Format type

348441, 348437, H04N 701

Patent

active

055006795

ABSTRACT:
A standard definition (SD) corresponding image is derived from a high definition (HD) image by performing a vertical line sub-sampling for every field with a ratio of an N:1, where N is an odd number greater than 1. One of the simple sub-sampling methods, the pyramidal coding method and the sub-band coding method may be used. For first fields, every third line is derived. For the remaining fields, every third line positioned at the center of the lines derived from the first field is derived by taking positional relation thereof on a reproduced image screen into consideration. As a result, it is possible to obtain an SD corresponding image having an unbroken interlace structure.

REFERENCES:
patent: 5032908 (1991-07-01), Miller
patent: 5216719 (1993-06-01), Oh
patent: 5220422 (1993-06-01), Oh
patent: 5337089 (1994-08-01), Fisch
patent: 5384869 (1995-01-01), Wilkinson et al.
Proceeding of International Conference on Acoustics Speech and Signal Processing, M. Antonini, et al. "Image Coding--" M 9.10, 2297-2300 (1990).

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