Patent ID: 7289170

Claim:
A method for compensating for an interlaced-scan type video signal having first and second fields of data, each field representing a predetermined number of data lines per a display screen beginning with a first data line and ending with a last data line, the method comprising the steps of: i) storing the data corresponding to the last predetermined portion of the last data line of the first field (hereinafter “the-first-field-last-data-line-subpart-data”) in a first memory and storing the data corresponding to the beginning predetermined portion of the first data line of the second field (hereinafter “the-second-field-first-data-line-subpart-data”) in a second memory; ii) determining whether a present video signal is a first field signal or a second field signal through an equalizing pulse period of each field; iii) counting a number of data lines of the first and second field signals; iv) when the present video signal is determined to be a first field signal, copying the-second-field-first-data-line-subpart-data stored in the second memory in the first memory so that the-second-field-first-data-line-subpart-data precede the first data line of the first field stored in the first memory; and v) when the present video signal is determined to be a second field signal, copying the-first-field-last-data-line-subpart-data stored in the first memory in the second memory so that the-first-field-last-data-line-subpart-data is append to the final data line of the second field stored in the second memory.