Aperture correcting circuit

Abstract

Abstract PURPOSE:To attain natural state for smooth change in a luminance signal by applying four arithmetical operation for aperture correction and handling the obtained data whose low order (a)-bit is rounded off as the aperture correction data. CONSTITUTION:After an n-bit accuracy of aperture correction data 305 is obtained by a series of adders/subtractors 302-304 to a luminance signal 301 of n-bit accuracy, a circuit 306 rounds off the LSB of the data and the result is handled as the aperture correction data 307 of (n-1)-bit. Since the change in + or -1LSB at n-bit accuracy is neglected, no aperture correction relating to the change in the luminance signal at each 1LSB is not conducted. Thus, the smooth change of the luminance signal is expressed naturally so as to improve picture quality.

Inventors

• 👤 Hiroki Matsuoka
• 👤 宏樹 松岡
• 👤 Atsushi Morimura
• 👤 淳 森村
• 👤 Makoto Fujimoto
• 👤 眞 藤本
• 👤 Yoshinori Kitamura
• 👤 北村　好徳

Bibliographic Details