Title:
【発明の名称】テレビジヨン信号の雑音、カラークロストーク低減回路装置
Document Type and Number:
Japanese Patent JP2914999
Kind Code:
B2
Abstract:
For simultaneously reducing noise and cross-colour in television signals, it is proposed on the basis of a method for noise reduction with the aid of recursive digital filters to use an adaptive recursive signal filtering in which the filter coefficients (KC) for filtering the chrominance signals (IB, IR) are not derived from the signals themselves but from the luminance signal (IL). In this manner, only one change detector (BD) is now required for all three signals (IL, IB, IR) which is followed by an evaluating circuit (AS) for adjusting the chrominance filter coefficients (KC).
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Inventors:
GYUNTAA SHEFURAA
Application Number:
JP13731889A
Publication Date:
July 05, 1999
Filing Date:
May 29, 1989
Export Citation:
Assignee:
JIIMENSU AG
International Classes:
H03H17/00; H03H17/04; H03H21/00; H04N9/64; H04N9/77; (IPC1-7): H04N9/77; H04N9/64
Domestic Patent References:
| JP6282893A | ||||
| JP5964989A | ||||
| JP61224716A | ||||
| JP6113890A |
Attorney, Agent or Firm:
Iwao Yamaguchi