Pulse or digital communications – Bandwidth reduction or expansion – Television or motion video signal
Reexamination Certificate
2005-10-05
2010-08-31
Perungavoor, Sath V (Department: 2624)
Pulse or digital communications
Bandwidth reduction or expansion
Television or motion video signal
C382S275000
Reexamination Certificate
active
07787541
ABSTRACT:
Pre filtering is commonly used in video encoding to remove undesirable noise from video sources. Without a pre filter, the noise degrades the performance of a video encoder by wasting a number of bits to represent the noise itself, and by introducing encoding artifacts such as blocking and ringing noise. However, excess use of pre filtering will degrade subjective visual quality. This invention employs an automatic pre filter control using a subjective noise detector capable of measuring noise that strongly correlates to subjective video quality.
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Koshiba Osamu
Osamoto Akira
Brady W. James
Marshall, Jr. Robert D.
Perungavoor Sath V
Telecky , Jr. Frederick J.
Texas Instruments Incorporated
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