| 摘要 |
PROBLEM TO BE SOLVED: To provide a killer circuit characterized in that failures are few when presence/absence of a color is judged, even for a signal of small chroma level in a chroma signal of a PAL system. SOLUTION: This circuit is provided with a first multiplying circuit 101, a second multiplying circuit 102, a first low-pass filter circuit 103, a second low-pass filter circuit 104, a first BLK circuit 105, a second BLK circuit 106, an APC(Auto Phase Control) circuit 107, a 1H delay circuit 108, a subtraction circuit 109, a lone inversion circuit 110, a cut-over circuit 111 and the killer circuit 112.
|
