Intraprediction method and apparatus using video symmetry and video encoding and decoding method and apparatus
First Claim
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1. An intraprediction method comprising performing intraprediction by predicting information in a second region to be encoded in a video based on an axial symmetry of a first region of the video with respect to a predetermined axis.
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Abstract
An intraprediction method which improves compression efficiency using the symmetry of a video in the intraprediction of the video and a video encoding and decoding method and apparatus using the intraprediction method. The intraprediction method includes performing intraprediction by predicting a first region to be encoded in a video based on axial symmetry of a second region of the video with respect to a predetermined axis.
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Citations
31 Claims
- 1. An intraprediction method comprising performing intraprediction by predicting information in a second region to be encoded in a video based on an axial symmetry of a first region of the video with respect to a predetermined axis.
- 9. An intraprediction apparatus which performs intraprediction by predicting information in a second region to be encoded in a video based on an axial symmetry of a first region of the video with respect to a symmetry axis.
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16. A video encoding method comprising:
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detecting a symmetric region of a video to be encoded in an intraprediction mode;
determining a symmetry axis of the symmetric region and predicting a first portion of the symmetric region based on a second portion of the symmetric region with respect to the symmetry axis; and
calculating a difference between the first portion and the second portion and performing compression encoding on information about the difference and information about the symmetric region. - View Dependent Claims (17, 18)
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19. A video encoder comprising:
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an intraprediction unit which detects a symmetric region of a video and predicts a first portion of the symmetric region based on a second portion of the symmetric region with respect to a symmetry axis; and
a compression unit which performs compression encoding on information about a difference between a video predicted by the intraprediction unit and an original video and information about the symmetric region. - View Dependent Claims (20, 21)
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22. A video decoding method of decoding a video from a compression-encoded bitstream, the video decoding method comprising:
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detecting a symmetric region from a video included in the compression-encoded bitstream; and
decoding a first portion of the symmetric region to generate a decoded first portion and then a second portion of the symmetric region with respect to a symmetry axis of the symmetric region and predicting information in the second portion using the decoded first portion. - View Dependent Claims (23, 24, 25, 26)
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27. A video decoder that decodes a video from a compression-encoded bitstream, the video decoder comprising:
an intraprediction unit which detects a symmetric region from a video included in the compression-encoded bitstream, decodes a first portion of the symmetric region to generate a decoded first portion and then a second portion of the symmetric region with respect to a symmetry axis of the symmetric region, and predicts information in the second portion based on the decoded first portion. - View Dependent Claims (28, 29, 30, 31)
Specification