Gain controller for video signal

Abstract

Abstract PURPOSE:To simplify the constitution and to improve the performance by providing a nonlinear gain correction means, a multiplier means and a control means to apply nonlinear gain correction and linear gain correction. CONSTITUTION:The gain controller is provided with a nonlinear gain correction means 12, a multiplier means 15 and a control means 17, and a 1st signal outputted from the control means 17 is inputted to the nonlinear gain correction means 12, in which the signal is subject to nonlinear gain correction and other signal outputted from the control means 17 is inputted to the multiplier means 15, in which the signal is subject to linear gain correction. Thus, each signal processing such as gain adjustment, gamma correction, color temperature adjustment and clipping is executed in the lump without being separated for each block, then the circuit constitution is simplified and high brightness resolution and excellent color reproducibility are obtained.

Inventors

• 👤 Masayuki Yoneyama
• 👤 匡幸 米山

Bibliographic Details