Method and apparatus for encoding/decoding image and recording medium for storing bitstream
AssigneesHyundai Motor Company, Kia Corporation
InventorsJungah CHOI, Jin HEO, Seung Wook PARK
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Abstract
According to an embodiment of the present invention, a method for decoding an image is provided including deriving a first quantization index, deriving a second quantization index by shifting the first quantization index, deriving a first reconstructed transformed coefficient and a second reconstructed transformed coefficient by performing dequantization on the first quantization index and the second quantization index respectively, and generating final reconstructed transformed coefficients by applying a first weight and a second weight to the first reconstructed transformed coefficient and the second reconstructed transformed coefficient respectively.
Claims20
A method for decoding an image, the method comprising:
- deriving a first quantization index;
- deriving a second quantization index by shifting the first quantization index;
- deriving a first reconstructed transformed coefficient and a second reconstructed transformed coefficient by performing dequantization on the first quantization index and the second quantization index respectively;
- and
- generating final reconstructed transformed coefficients by applying a first weight and a second weight to the first reconstructed transformed coefficient and the second reconstructed transformed coefficient respectively.
A method for encoding an image, the method comprising:
- obtaining a first quantization index;
- deriving a second quantization index by shifting the first quantization index;
- deriving a first reconstructed transformed coefficient and a second reconstructed transformed coefficient by performing dequantization on the first quantization index and the second quantization index respectively;
- and
- generating final reconstructed transformed coefficients by applying a first weight and a second weight to the first reconstructed transformed coefficient and the second reconstructed transformed coefficient respectively.
A computer-readable recording medium for storing a bitstream generated by a method for encoding an image,
- wherein the method for encoding an image comprises:
- obtaining a first quantization index;
- deriving a second quantization index by shifting the first quantization index;
- deriving a first reconstructed transformed coefficient and a second reconstructed transformed coefficient by performing dequantization on the first quantization index and the second quantization index respectively;
- and
- generating final reconstructed transformed coefficients by applying a first weight and a second weight to the first reconstructed transformed coefficient and the second reconstructed transformed coefficient respectively.
(canceled)
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