Patent ID: 6040868
Filing Date: 2000-03-21
Classification: H04N

Abstract:
A device for converting scanning patterns from interlaced scanning to sequential scanning, comprising:means for receiving an input interlaced scanning video signal having alternating odd and even fields of scanning lines;a first line memory for storing picture elements of the input interlaced scanning video signal in a first line of an odd field;a second line memory for storing picture elements of the input interlaced scanning video signal in a last line of an even field;a plurality of sequential line memories serving as buffers for storing picture elements of the input interlaced scanning video signal in sequence for each scanning line;a demultiplexer for sequentially inputting the picture elements of the input interlaced scanning video signal into each of said first line memory, said second line memory and each of said plurality of sequential line memories in accordance with a write clock signal;a first multiplexer connected to said first line memory, said second line memory and said plurality of sequential line memories, for producing a first output signal by multiplexing between the picture elements of the input interlaced scanning video signal stored in one of said first line memory, said second line memory and selected one from said plurality of sequential line memories in accordance with a read clock signal;an interpolator for interpolating picture elements between adjacent scanning lines of the input interlaced scanning video signal in one of said odd field and said even field to produce interpolated picture elements;a second multiplexer connected to said first multiplexer and said interpolator, for producing a second output signal representing a sequential scanning video signal by multiplexing between the picture elements contained in said first output signal and the interpolated picture elements provided from said interpolator; anda control section for controlling operations of said demultiplexer, said first and second multiplexers.