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US 2019/0297322 A1Published application
Decomposition of residual data during signal encoding, decoding and reconstruction in a tiered hierarchy
AssigneeV-Nova International Limited
InventorsLuca Rossato, Guido Meardi
Life of this patent
Estimating the term…
Abstract
Computer processor hardware receives a first set of adjustment values. The first set of adjustment values specify adjustments to be made to a predicted rendition of a signal generated at a first level of quality to reconstruct a rendition of the signal at the first level of quality. The computer processor hardware processes the first set of adjustment values and derives a second set of adjustment values based on the first set of adjustment values and a rendition of the signal at a second level of quality. The second level of quality is lower than the first level of quality.
Claims21
1-23. (canceled)
A method comprising:
- via computer processing hardware:
- receiving an image signal at a first level of quality;
- producing a rendition of the image signal at a second level of quality, the second level of quality being of lower resolution than the first level of quality;
- producing residual data, said residual data corresponding to a difference between the image signal at the first level of quality and a predicted rendition of the signal at the first level of quality as constructed using the rendition of the image signal at the second level of quality;
- transforming the residual data to generate transformed residual components;
- and
- processing the transformed residual components to generate encoded data for transmission to a target device.
4 more elements
A method comprising:
- via computer processing hardware:
- receiving encoded data associated with a rendition of an image signal at a second level of quality;
- receiving encoded data associated with a set of transformed residual components;
- performing an inverse transform to generate residual data from the set of transformed residual components;
- producing a preliminary rendition of the image signal at a first level of quality based on the encoded data associated with the rendition of the image signal at the second level of quality, the first level of quality being of a higher resolution than the second level of quality;
- and
- producing a secondary rendition of the image signal at the first level of quality based on the residual data and the preliminary rendition of the image signal at the first level of quality.
4 more elements
An encoder for an image signal comprising:
- a downsampler to receive an image signal at a first level of quality and to produce a rendition of the image signal at a second level of quality, the second level of quality being of lower resolution than the first level of quality;
- a residual calculator to produce residual data, said residual data corresponding to a difference between the image signal at the first level of quality and a predicted rendition of the image signal at the first level of quality as constructed using the rendition of the image signal at the second level of quality;
- and
- a transformer to generate transformed residual components from the residual data,
- wherein the encoder is configured to process the transformed residual components to generate encoded data for transmission to a target device.
2 more elements
A decoder comprising:
- an inverse directional decomposer to receive encoded data associated with a set of transformed residual components and to perform an inverse directional decomposition to generate residual data from the set of transformed residual components,
- wherein the decoder is configured to receive encoded data associated with a rendition of an image signal at a second level of quality and to produce a secondary rendition of the image signal at the first level of quality, the first level of quality being of a higher resolution than the second level of quality, the secondary rendition of the image signal being produced based on the residual data and a preliminary rendition of the signal at the first level of quality, the preliminary rendition of the signal at the first level of quality being produced from the received encoded data associated with the rendition of the image signal at the second level of quality.
Dependencies are inferred from the claim text.