Video signal encoding device and video signal encoding method
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Abstract
Included are: a prefilter (101) for outputting, based on filter characteristics control data, predetermined frequency components in an input video signal as current image data; encoding means (116) for subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to current image data as a result of the encoding process; and filter control means (117) for outputting the filter characteristics control data that is set based only on one or two of the encoding parameters.
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Citations
19 Claims
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1-10. -10. (canceled)
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11. A video signal encoding device, comprising:
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a prefilter for outputting, based on filter characteristics control data, a predetermined frequency component in an input video signal as current image data;
a encoder for subjecting the current image data to an encoding process; and
a filter controller for outputting the filter characteristics control data that is set based on encoding parameters provided by the encoder, wherein the prefilter includes;
a low-pass filter for outputting a low-frequency component in the input video signal;
a first output unit for correcting the low-frequency component based on the filter characteristics control data for output as a corrected low-frequency component; and
a second output unit for correcting the input video signal based on the filter characteristics control data for output as a corrected video signal, wherein the prefilter outputs the predetermined frequency component in the input video signal based on the corrected low-frequency component or the corrected video signal. - View Dependent Claims (12, 13, 14, 15, 16, 18)
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17. A video signal encoding method, comprising:
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a frequency component output process for outputting, based on filter characteristics control data, a predetermined frequency component in an input video signal as current image data;
an encoding parameter output process for subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to the current image data as a result of the encoding process; and
a control data output process for outputting the filter characteristics control data that is set based on the encoding parameters, wherein the frequency component output process includes;
a low-frequency component output process for outputting a low-frequency component in the input video signal;
a first frequency component correction process for correcting the low-frequency component based on the filter characteristics control data for output as a corrected low-frequency component; and
a second frequency component correction process for correcting the input video signal based on the filter characteristics control data for output as a corrected video signal, wherein the frequency component output process outputs the predetermined frequency component in the input video signal based on the corrected low-frequency component or the corrected video signal.
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19. A video signal encoding program, comprising:
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a frequency component output step of outputting, based on filter characteristics control data, a predetermined frequency component in an input video signal as current image data;
an encoding parameter output step of subjecting the current image data to an encoding process, and outputting encoding parameters together with a bit stream corresponding to current image data as a result of the encoding process; and
a control data output step of outputting the filter characteristics control data that is set based on the encoding parameters, wherein the frequency component output step includes;
a low-frequency component output step of outputting a low-frequency component in the input video signal;
a first frequency component correction step of correcting the low-frequency component based on the filter characteristics control data for output as a corrected low-frequency component; and
a second frequency component correction step of correcting the input video signal based on the filter characteristics control data for output as a corrected video signal, wherein the frequency component output step outputs the predetermined frequency component in the input video signal based on the corrected low-frequency component or the corrected video signal.
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Specification