Patent ID: 7139030

Claim:
A video signal processing apparatus comprising: a detector which detects whether or not an input video signal is based on a telecine-converted video signal obtained by telecine conversion in a 2-3 pulldown conversion system from a film source having 24 film frames per second; a frame memory; a writing device which writes the input video signal in said frame memory on a line sequential scanning frame unit base in synchronism with a first vertical synchronizing signal for writing; a reading device which reads out the written line sequential scanning video signal in said frame memory in synchronism with a second vertical synchronizing signal for reading; and a synchronism controller which generates the second vertical synchronizing signal having a frequency different from a frequency of the first vertical synchronizing signal in synchronism with the first vertical synchronizing signal of a starting frame of five frames forming a pattern after the conversion in the 2-3 pulldown conversion system when said detector judges that the input video signal is based on a telecine-converted video signal.