Inverse hyperbolic comb filter

Details Inverse hyperbolic comb filter Inverse hyperbolic comb filter

1992-10-26

1993-12-14

Kostak, Victor R.

Facsimile and static presentation processing

Static presentation processing

Attribute control

358 36, H04N 978

Patent

active

052708039

ABSTRACT:
An inverse hyperbolic comb filter decodes an encoded signal by subtracting a vertically filtered and horizontally filtered version of the encoded signal from a delayed version of the encoded signal whereupon the resulting output is further horizontally filtered to provide a first decoded output. A twice delayed version of the input signal then has the first output signal subtracted therefrom to provide a second output. Optional further vertical filtering may be employed to vertically filter the output of the first subtractor before the final horizontal filtering is performed. The filter may also be employed in encoding signals wherein the components to be encoded are first filtered prior to combining. The inverse hyperbolic comb filter is applicable to any system employing combining of two-dimensional signals via quadrature modulation and may also be employed in three-dimensional systems.

REFERENCES:
patent: 4907073 (1990-03-01), Sugiyama
patent: 5150202 (1992-09-01), Ledinh et al.

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