Takeshi Hamasaki

A new noise reduction system for video camera

A novel noise reduction system developed to improve the sensitivity of video cameras is reported. The frequency resolution characteristics, feedback characteristics, and bit accuracies of the noise reduction circuit in which the field or frame difference signal is separated into frequency components were studied for improving the S/N (signal-to-noise ratio) of the color difference signal, and for optimizing its circuit construction. An S/N improvement as high as 9 dB at a permissible lagged image level is thus accomplished, and this is to be used to improve the sensitivity of home video cameras. >

Solid State Imaging Techniques. A New 3 CCD Camera System for Consumer Use.

We have newly developed a 3-CCD camera system to improve performance under difficult conditions such as back-lighting, Electronic Image Stabilization mode, electronic zoom, and insufficient illumination. One of the key technologies of the system is new signal processing methods such as Neuro-Gamma, Vertical Stagger Processing, and New Noise Reduction in order to improve the performance under the above conditions. The 0.5 μm process and chip integration produce digital LSIs with high density integration and low power.