Methods of and circuits for video signal processing

Details Methods of and circuits for video signal processing Methods of and circuits for video signal processing

H - Electricity

04

N

350/3.1

H04N 7/00 (2006.01) G06T 3/00 (2006.01) H04N 5/262 (2006.01)

Patent

CA 1254650

1 ABSTRACT OF THE DISCLOSURE A method of and apparatus for processing video signals to achieve a visual effect corresponding to that which would be achieved if an input two- dimensional image were projected on to a three-dimensional surface is disclosed. A video signal is formed into digitized sample values each having an input pixel address comprising X and Y coordinate values. X and Y scaling multipliers and Z coordinate values corresponding to the respective pixel addresses on the three-dimensional surface to which each of the input pixel addresses will be moved in achieving the effect are stored in a mapping store. Multipliers multiply the X and Y coordinate values of each input pixel address by the corresponding X and Y scaling multipliers, and the resulting scaled X and Y coordinate values and the associated Z coordinate values are supplied to a perspective transformation device to derive the output X and Y coordinate values corresponding to the effect.

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