Methods and Systems for Combining Layers in a Multi-Layer Bitstream
First Claim
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1. A method for combining layers in a multi-layer bitstream, said method comprising:
- a) inverse quantizing a first-layer quantized transform coefficient thereby creating a first-layer transform coefficient;
b) scaling said first-layer transform coefficient to match a characteristic of a second-layer thereby creating a scaled, first-layer transform coefficient;
c) inverse quantizing a second-layer quantized transform coefficient thereby creating a second-layer transform coefficient; and
d) combining said scaled, first-layer transform coefficient with said second-layer transform coefficient to form a combined coefficient.
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Abstract
Embodiments of the present invention comprise systems and methods for managing and combining layers in a multi-layer bitstream.
83 Citations
29 Claims
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1. A method for combining layers in a multi-layer bitstream, said method comprising:
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a) inverse quantizing a first-layer quantized transform coefficient thereby creating a first-layer transform coefficient; b) scaling said first-layer transform coefficient to match a characteristic of a second-layer thereby creating a scaled, first-layer transform coefficient; c) inverse quantizing a second-layer quantized transform coefficient thereby creating a second-layer transform coefficient; and d) combining said scaled, first-layer transform coefficient with said second-layer transform coefficient to form a combined coefficient. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
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12. A system for combining layers in a multi-layer bitstream, said system comprising:
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a) a first inverse quantizer for inverse quantizing a first-layer quantized transform coefficient thereby creating a first-layer transform coefficient; b) a scaler for scaling said first-layer transform coefficient to match a characteristic of a second-layer thereby creating a scaled, first-layer transform coefficient; c) a second inverse quantizer for inverse quantizing a second-layer quantized transform coefficient thereby creating a second-layer transform coefficient; and d) a coefficient combiner for combining said scaled, first-layer transform coefficient with said second-layer transform coefficient to form a combined coefficient. - View Dependent Claims (13, 14)
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15. A method for converting an SVC-compliant bitstream to AVC-compliant data, said method comprising:
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a) receiving an SVC-compliant bitstream comprising prediction data, base-layer residual data and enhancement-layer residual data; b) inverse quantizing said base-layer residual data thereby creating base-layer transform coefficients; c) inverse quantizing said enhancement-layer residual data thereby creating enhancement-layer transform coefficients; d) scaling said base-layer transform coefficients to match a quantization characteristic of said enhancement-layer thereby creating scaled base-layer transform coefficients; and e) combining said scaled base-layer transform coefficients with said enhancement-layer transform coefficients to form combined coefficients. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A method for combining layers in a multi-layer bitstream, said method comprising:
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a) receiving a first-layer quantized transform coefficient; b) scaling said first-layer quantized transform coefficient to match a characteristic of a second-layer thereby creating a scaled, first-layer quantized transform coefficient; c) receiving a second-layer quantized transform coefficient; and d) combining said scaled, first-layer transform coefficient with said second-layer quantized transform coefficient to form a combined quantized coefficient. - View Dependent Claims (22, 23, 24, 25)
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26. A method for conditionally combining layers in a multi-layer bitstream, said method comprising:
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a) receiving a first-layer quantized transform coefficient; b) receiving a second-layer quantized transform coefficient; c) receiving a layer combination indicator; d) scaling said first-layer quantized transform coefficient to match a characteristic of a second-layer thereby creating a scaled, first-layer quantized transform coefficient, when said layer combination indicator indicates transform domain accumulation; and e) combining said scaled, first-layer transform coefficient with said second-layer quantized transform coefficient to form a combined quantized coefficient, when said layer combination indicator indicates transform domain accumulation. - View Dependent Claims (27, 28)
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29. A method for reconstructing an enhancement layer from a multi-layer bitstream, said method comprising:
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a) receiving a first-layer intra-prediction mode; b) receiving a second-layer bitstream prediction indicator, said indicator indicating that said first-layer prediction mode is to be used for prediction of said second layer; c) using said first-layer prediction mode to construct a second-layer prediction based on adjacent block data in said second layer; and d) combining said second-layer prediction with residual information thereby creating a reconstructed second layer.
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Specification