Title:
合成ビデオ信号の生成方法および回路
Document Type and Number:
Japanese Patent JP3987592
Kind Code:
B2
Abstract:
A method and a circuit for generating a composite video signal formed from a foreground signal and a background signal in accordance with the luminance self-key mode is described, in which the key signal is derived from the luminance foreground signal in dependence upon a clipping level. To avoid a quadratic dependence of the luminance signal during product formation of the key signal with the foreground signal (referred to as "double multiplication"), the linear key signal should be replaced by a control signal which is hyperbolically formed in such a way that the unwanted quadratic dependence is eliminated.
Inventors:
Liner Galeman
Application Number:
JP23294695A
Publication Date:
October 10, 2007
Filing Date:
September 11, 1995
Export Citation:
Assignee:
Bethes Holding International Baby
International Classes:
H04N5/275; H04N5/272; H04N9/75
Domestic Patent References:
| JP5145849A | ||||
| JP7274066A | ||||
| JP6086169A | ||||
| JP4070293A | ||||
| JP63079492A |
Attorney, Agent or Firm:
Toshio Yano
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard
Toshiomi Yamazaki
Takuya Kuno
Einzel Felix-Reinhard