Title:
【発明の名称】ビデオフィルタ
Document Type and Number:
Japanese Patent JPH04505534
Kind Code:
A
Abstract:
PCT No. PCT/GB90/01252 Sec. 371 Date Feb. 5, 1992 Sec. 102(e) Date Feb. 5, 1992 PCT Filed Aug. 9, 1990 PCT Pub. No. WO91/03123 PCT Pub. Date Mar. 7, 1991.Temporarily filtered video samples are formed as the sum of a previous frame output sample and a non-linear function of the difference between current and previous samples. The function is non-linear only for absolute values of differences less than 50% (preferably 10%) of the maximum range of the difference, and a smaller lookup table is used for implementing the non-linear function than would otherwise be the case.
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Inventors:
Whibri, Michael William
Hopper, Robert William
Hopper, Robert William
Application Number:
JP51180790A
Publication Date:
September 24, 1992
Filing Date:
August 09, 1990
Export Citation:
Assignee:
British Telecommunications Public Limited Company
International Classes:
G06F1/02; H03G11/06; H04N5/21; (IPC1-7): H04N5/21
Attorney, Agent or Firm:
Takehiko Suzue (3 outside)