Methods and systems for multiplication-free inter-layer image prediction
First Claim
Patent Images
1. A method for predicting, by a video encoder, a high dynamic range (HDR) image element, said method comprising:
- receiving a low dynamic range (LDR) image element value for an image element;
receiving a prediction operation indicator associated with a prediction shift value;
scaling said LDR image element value via a binary shift operation, wherein the binary shift operation is based on said prediction shift value; and
combining, by the video encoder, said scaled LDR image element value with said LDR image element value via an additive operation, wherein the additive operation is based on said prediction operation indicator thereby producing a prediction image value.
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Abstract
Embodiments of the present invention comprise systems and methods for predicting image elements, comprising scaling a received low dynamic range (LDR) image element value for an image element via a binary shift operation, where the binary shift operation is based on a received prediction shift value, and combining, via a received additive operation, the scaled LDR image element value with the received LDR image element value.
81 Citations
21 Claims
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1. A method for predicting, by a video encoder, a high dynamic range (HDR) image element, said method comprising:
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receiving a low dynamic range (LDR) image element value for an image element; receiving a prediction operation indicator associated with a prediction shift value; scaling said LDR image element value via a binary shift operation, wherein the binary shift operation is based on said prediction shift value; and combining, by the video encoder, said scaled LDR image element value with said LDR image element value via an additive operation, wherein the additive operation is based on said prediction operation indicator thereby producing a prediction image value. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A method for predicting, by a video encoder, a high dynamic range (HDR) image element, said method comprising:
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receiving a low dynamic range (LDR) image element value for an image element; producing a first prediction based on said LDR image element value; receiving a prediction operation indicator associated with a prediction shift value; scaling said LDR image element value via a binary shift operation, wherein the binary shift operation is based on said prediction shift value; and combining, by the video encoder, said scaled LDR image element value with said first prediction via an additive operation, wherein the additive operation is based on said prediction operation indicator, thereby producing a prediction image value. - View Dependent Claims (8, 9, 10, 11, 12, 13)
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14. A system for predicting a high dynamic range (HDR) image element, said system comprising:
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an LDR receiver for receiving a low dynamic range (LDR) image element value for an image element; a video encoder for producing a first prediction based on said LDR image element value; a prediction data receiver for receiving a prediction operation indicator associated with a prediction shift value; means for scaling said LDR image element value via a binary shift operation, wherein the binary shift operation is based on said prediction shift value; and a prediction combiner for combining said scaled LDR image element value with said first prediction via an additive operation, wherein the additive operation is based on said prediction operation indicator, thereby producing a prediction image value. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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21. A method comprising:
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scaling a received low dynamic range (LDR) image element value for an image element via a binary shift operation, wherein the binary shift operation is based on a received prediction shift value; combining, via a received additive operation, the scaled LDR image element value with the received LDR image element value; and predicting, by a video encoder, a high dynamic range (HDR) image value based on the combined scaled LDR image element value and the received LDR image element value.
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Specification