Television – Image signal processing circuitry specific to television – Noise or undesired signal reduction
Patent
1993-12-10
1995-08-01
Groody, James J.
Television
Image signal processing circuitry specific to television
Noise or undesired signal reduction
348416, H04N 5213
Patent
active
054383749
ABSTRACT:
Motion video is represented by digital signals. The digital signals can be compressed by coding to reduce bitspace. Noise in the signal, however, reduces the efficiency of coding. The present invention is a system and method for reducing noise in video signals by filtering. The signal for the current frame is weightedly averaged with signals for a future and prior frame. The future and prior frames are given less weight as they differ more from the current frame. When motion compensation information is available, the motion compensated future and prior frames can be used for averaging, further improving filtering.
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AT&T Corp.
Groody James J.
Murrell Jeffrey S.
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