Adaptive filter for suppressing repetitive high-frequency information in a video data stream
First Claim
Patent Images
1. An adaptive filter to suppress repetitive high-frequency information in an image comprising pixels, the image having repetitive high-frequency information, comprising:
- decision circuitry to identify the repetitive high-frequency information in at least a subset of the pixels of the image to provide a repetitive-sequence signal;
a low-pass filter to filter the image to produce low-pass filtered pixels; and
a switch to output the pixels of the image as adaptive-filter output, and in response to the repetitive-sequence signal, to output the low-pass filtered pixels as the adaptive-filter output.
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Abstract
An image comprises pixels, and has repetitive high-frequency information. Decision circuitry identifies the repetitive high-frequency information in at least a subset of the pixels of the image to provide a repetitive-sequence signal. A low-pass filter filters the image to produce low-pass filtered pixels. A switch outputs the pixels of the image as adaptive-filter output, and in response to the repetitive-sequence signal, outputs the low-pass filtered pixels as the adaptive-filter output.
13 Citations
27 Claims
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1. An adaptive filter to suppress repetitive high-frequency information in an image comprising pixels, the image having repetitive high-frequency information, comprising:
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decision circuitry to identify the repetitive high-frequency information in at least a subset of the pixels of the image to provide a repetitive-sequence signal;
a low-pass filter to filter the image to produce low-pass filtered pixels; and
a switch to output the pixels of the image as adaptive-filter output, and in response to the repetitive-sequence signal, to output the low-pass filtered pixels as the adaptive-filter output. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A video transmitter system comprising:
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an adaptive filter to suppress at least a portion of repetitive high-frequency information from a video signal to provide an adaptive-filter video signal;
a compression engine to compress the adaptive-filter video signal to provide a compressed video signal; and
a network interface to transmit the compressed video signal over a transmission medium. - View Dependent Claims (9, 10, 11, 12)
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13. A method for suppressing repetitive high-frequency information in a video image having repetitive high-frequency information, the video image having pixels represented as video image data, comprising:
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identifying repetitive high-frequency information in the video image data;
low-pass filtering the video image data to produce low-pass filtered video image data; and
when the repetitive high-frequency information is identified, outputting the low-pass filtered video image data as adaptive-filter image data, otherwise outputting the unmodified video image data as the adaptive-filter image data. - View Dependent Claims (14, 15, 16, 17, 18, 19, 20)
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21. An adaptive filter to suppress repetitive high-frequency information in an image comprising pixels, the image having repetitive high-frequency information, comprising:
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means for identifying the repetitive high-frequency information in at least a subset of the pixels of the image to provide a repetitive-sequence signal;
means for filtering the image to produce low-pass filtered pixels; and
means for outputting the pixels of the image as adaptive-filter output, and in response to the repetitive-sequence signal, outputting the low-pass filtered pixels as the adaptive-filter output. - View Dependent Claims (22, 23, 24, 25, 26, 27)
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Specification