Patent ID: 7536089

Claim:
An image signal reproduction apparatus for reproducing a main image signal including either a first type of image signal scanned in a progressive manner and having a 24 Hz frame frequency, a second type of image signal scanned and image-captured in an interlaced manner and having a 30 Hz frame frequency or a third type of image signal in which a source image signal image-captured at a 24 Hz frame frequency is converted into an interlaced scanned image having a 30 Hz frame frequency, using a transfer information including the main image signal and a determination flag for determining whether the main image signal is the first type of image signal, the second type of image signal or the third type of image signal, the apparatus including: a field memory for storing 2 fields of the second type of image signal or the third type of image signal; a field difference detection section for detecting a difference between an output of the second type of image signal or the third type of image signal and an output of the field memory; a material determination section for determining whether the main image signal from the field difference detection section is the second type of image signal or the third type of image signal when the determination flag determines that the main image signal is the second type of image signal or the third type of image signal; a timing signal generation section for generating a timing signal indicating a breakpoint between frames of the source image signal image-captured at the 24 Hz frame frequency of the third type of image signal in the interlaced scanned image signal, based on an output of the field difference detection section when the material determination section detects that the main image signal is the third type of image signal; and a progressive scanning conversion section for obtaining a progressive scanned image signal by synthesizing 2 fields of interlaced scanned image signals of 60 fields per second in response to the timing signal when a generation method of an insertion scanning signal is changed in response to an output of the material determination section and the material determination section determines that the main image signal is the third type of image signal.