Signal processing circuit

Abstract

Abstract PURPOSE:To effectively use a frame memory, by using a frame memory, the detection of movement and a control circuit in common for the realization of both Y/C separation and noise reduction, relating to a signal processing circuit separating a luminance and a chroma signal (Y/C separation) from a composite color television signal. CONSTITUTION:A signal delayed by TF, being the subtraction of the sum of a delay time T1 of a band pass filter 22 and a delay time T2 of a two-dimension comb type filter 23, (T1+T2) from one frame TF, is picked up from a 1-frame memory 4, applied to a delay circuit 28 and the filter 22, a signal F2 is formed with synthesizers 30, 32 and a chroma inverter 31, and the signal F2 is applied to a movement detection and control circuit 17 together with the signals F3, F1. The signals F1, F2, F3 are applied to a synthesizer 11 via multipliers 5, 6 and 7 respectively and a gate circuit 36, and the gate circuit 36 is controlled, allowing to attain the Y/C separation.

Inventors

• 👤 Yoshitaka Hashimoto
• 👤 橋本　慶隆
• 👤 Seiichiro Iwase
• 👤 岩瀬　清一郎

Bibliographic Details