Spatially scalable video coding
First Claim
Patent Images
1. A method for encoding a current image, the method comprising:
- generating low pass information of residue data for the current image based on low pass information for the current image;
ascertaining high pass information for the current image responsive to the current image based at least in part on calculating a difference between the current image and up-sampled information for the current image;
ascertaining high pass information of prediction data for the current image by applying prediction data for the current image to a high-pass information determining processor that mixes the prediction data with a down-sampled then up-sampled version of the prediction data to generate the high pass information of prediction data for the current image; and
generating high pass information of residue data for the current image based at least in part on calculating a difference between the high pass information for the current image and the high pass information of prediction data for the current image.
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Abstract
Video data for a high resolution image unit is coded with regard to both a low resolution reference image unit and a high resolution reference image unit. In an example encoding implementation, both low pass information and high pass information of residue data for a current image are generated. In an example decoding implementation, a current image is reconstructed by synthesizing both low pass information and high pass information for the reconstructed image.
31 Citations
19 Claims
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1. A method for encoding a current image, the method comprising:
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generating low pass information of residue data for the current image based on low pass information for the current image; ascertaining high pass information for the current image responsive to the current image based at least in part on calculating a difference between the current image and up-sampled information for the current image; ascertaining high pass information of prediction data for the current image by applying prediction data for the current image to a high-pass information determining processor that mixes the prediction data with a down-sampled then up-sampled version of the prediction data to generate the high pass information of prediction data for the current image; and generating high pass information of residue data for the current image based at least in part on calculating a difference between the high pass information for the current image and the high pass information of prediction data for the current image. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A method for decoding a current image, the method comprising:
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generating low pass information for a reconstructed image based on low pass information of residue data for the current image; determining high pass information of prediction data by applying prediction data for the current image to a high-pass information determining processor that mixes the prediction data with a down-sampled then up-sampled version of the prediction data to generate the high pass information of prediction data; generating high pass information for the reconstructed image based on high pass information of residue data for the current image and based on the high pass information of prediction data; and producing a reconstructed current image by synthesizing the low pass information for the reconstructed image and the high pass information for the reconstructed image. - View Dependent Claims (11, 12, 13, 14)
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15. A device comprising:
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a processor; a memory coupled to the processor, wherein instructions stored in the memory program the processor to; code a current image unit at a given resolution level using first prediction data determined at the given resolution level and second prediction data determined at a lower resolution level, the coding comprising; applying the first prediction data to a high pass information determining processor that mixes the first prediction data with a down-sampled then up-sampled version of the first prediction data to generate high pass information of prediction data for the current image; determining high pass information for the current image based at least in part on calculating a difference between the current image and up-sampled information for the current image; generating high pass information of residue data for the current image unit based at least in part on the high pass information for the current image and the high pass information of prediction data. - View Dependent Claims (16, 17, 18, 19)
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Specification