VECTOR MAGNITUDE CONTROL OF A COMB FILTER

PURPOSE: A vector magnitude control of a comb filter is provided to suppress hanging dot in response to an absolute value of a chrominance vector. CONSTITUTION: Absolute values or the respective samples are applied to a tapped delay line including cascade connected one-sample delay stages(31). Taps...

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Bibliographic Details
Main Authors RUMREICH MARK FRANCIS, LUFKIN JOHN KIMBALL
Format Patent
LanguageEnglish
Korean
Published 07.07.2001
Edition7
Subjects
ANALOGUE COMPUTERS
BASIC ELECTRONIC CIRCUITRY
CALCULATING
COMPUTING
COUNTING
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
IMAGE DATA PROCESSING OR GENERATION, IN GENERAL
IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS
PHYSICS
PICTORIAL COMMUNICATION, e.g. TELEVISION
RESONATORS
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Summary:PURPOSE: A vector magnitude control of a comb filter is provided to suppress hanging dot in response to an absolute value of a chrominance vector. CONSTITUTION: Absolute values or the respective samples are applied to a tapped delay line including cascade connected one-sample delay stages(31). Taps are accessed at the respective delay line interconnections. Samples at the respective taps are applied to a summer(33) which forms the sum S(1 + z + z) which is equivalent to s0 + s1 + s2, assuming S is the chrominance signal. Sample absolute values from the respective taps are also applied to a max detector(37), which determines the sample having the maximum absolute value. The sample having the maximum absolute value is weighted in a weighting circuit(34). If the weighting factor is the value 3, the weighted maximum sample value 3Max(s1) and the sum S(1 + z + z) are applied to a summing circuit(35) which develops successive samples Vm = S(1 + z + z) + 3MAX(sl). The coefficients are not normalized, so the output of the summer is applied to a scaler(36) which normalizes the output values.
Bibliography:Application Number: KR20000071822