Patent ID: 8174614

Claim:
A video signal processing apparatus for converting an interlaced scan video signal to a progressive scan video signal by using a field delay which delays the interlaced scan video signal by a period of one or several fields, comprising: a field resolution determiner which detects high frequency components in a target field of the interlaced scan video signal, thereby outputting a signal indicative of a degree of the high frequency components existing in the target field in accordance with a result of the detecting of the high frequency components; and a pull-down sequence detector which detects whether or not the interlaced scan video signal satisfies a field sequence condition of a video signal subjected to telecine conversion by using an interframe correlation and an interfield correlation, thereby determining a result of detecting whether or not the interlaced scan video signal is a video signal subjected to telecine conversion, if the result of the detecting indicates that the interlaced scan video signal is not a video signal subjected to telecine conversion, the pull-down sequence detector outputting the result, if the result of the detecting indicates that the interlaced scan video signal is a video signal subjected to telecine conversion and the signal indicative of a degree of the high frequency components indicates a value equal to or greater than a predetermined value, the pull-down sequence detector outputting a result that the interlaced scan video signal is a video signal subjected to telecine conversion, if the result of the detecting indicates that the interlaced scan video signal is a video signal subjected to telecine conversion and the signal indicative of a degree of the high frequency components indicates a value smaller than the predetermined value, the pull-down sequence detector outputting a result that the interlaced scan video signal is not a video signal subjected to telecine conversion.