Entropy encoding/decoding method and apparatus
AssigneeSamsung Electronics Co., Ltd.
InventorBae-keun Lee
Life of this patent
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Abstract
Provided is a method and apparatus for enhancing the efficiency of entropy-coding a fine granular scalability (FGS) layer. The method of entropy-encoding current coefficients included in a predetermined one of a plurality of separate quality layers includes reading coefficients of lower layers, which correspond to the current coefficients; grouping the current coefficients according to a combination of the coefficients of the lower layers; and encoding each group of the current coefficients using a different context model.
Claims15
A method of entropy-encoding current coefficients included in a predetermined quality layer of a plurality of quality layers, the method comprising:
- reading coefficients of lower layers, which correspond to the current coefficients;
- grouping the current coefficients according to a combination of the coefficients of the lower layers;
- and
- encoding each group of the current coefficients using a different context model.
A method of entropy-decoding encoded current coefficients included in a predetermined quality layer of a plurality of quality layers, the method comprising:
- reading coefficients of lower layers, which correspond to the encoded current coefficients;
- selecting a context model for the encoded current coefficients according to a combination of the coefficients of the lower layers;
- and
- decoding each group of the encoded current coefficients using the selected context model to generate decoded current coefficients.
An apparatus for entropy-encoding current coefficients included in a predetermined quality layer of a plurality of quality layers, the apparatus comprising:
- a reading unit which reads coefficients of lower layers, which correspond to the current coefficients;
- a grouping unit which groups the current coefficients according to a combination of the coefficients of the lower layers;
- and
- an encoding unit which encodes each group of the current coefficients using a different context model.
An apparatus for entropy-decoding encoded current coefficients included in a predetermined quality layer of a plurality of quality layers, the apparatus comprising:
- a reading unit which reads coefficients of lower layers, which correspond to the encoded current coefficients;
- a selection unit which selects a context model for the encoded current coefficients according to a combination of the coefficients of the lower layers;
- and
- a decoding unit which decodes each group of the encoded current coefficients using the selected context model.
Dependencies are inferred from the claim text.