Feature encoding/decoding method and apparatus, and recording medium storing bitstream
Provided are a feature encoding/decoding method and apparatus, and a computer-readable recording medium generated by the feature encoding method are provided. The feature decoding method according to the present disclosure may comprise the steps of: acquiring, from a bitstream, first feature information and filtering information regarding the first feature information; inversely transforming the first feature information; and deriving, on the basis of the filtering information, second feature information for the inversely transformed first feature information.
1 . A feature decoding method performed by a feature decoding apparatus, the feature decoding method comprising:
obtaining first feature information and filtering information for the first feature information from a bitstream;
inversely transforming the first feature information; and
deriving second feature information for the inversely transformed first feature information based on the filtering information,
wherein the second feature information is derived by filtering the inversely transformed first feature information based on the filtering information and dequantizing the filtered first feature information,
wherein the filtering information includes quantized information including a first syntax element specifying whether filtering is applied and a second syntax element specifying a parameter of the filtering.
2 . The feature decoding method of claim 1 , wherein the second feature information is derived by filtering the inversely transformed first feature information based on the filtering information.
3 . The feature decoding method of claim 1 , wherein the second feature information is derived by dequantizing the inversely transformed first feature information and filtering the dequantized first feature information based on the filtering information.
4 . The feature decoding method of claim 1 ,
wherein the second syntax element is obtained based on the first syntax element specifying that the filtering is applied.
5 . The feature decoding method of claim 1 , wherein the filtering information is obtained from a feature level of the bitstream or obtained from a level higher than a feature level of the bitstream.
6 . A feature encoding method performed by a feature encoding apparatus, the feature encoding method comprising:
deriving transformed feature information based on feature information extracted from an image;
deriving inversely transformed feature information based on the transformed feature information; and
deriving filtering information based on the inversely transformed feature information,
wherein the deriving the transformed feature information comprises:
quantizing the extracted feature information; and
deriving the transformed feature information by transforming the quantized feature information,
wherein the filtering information includes quantized information including a first syntax element specifying whether filtering is applied and a second syntax element specifying a parameter of the filtering.
7 . The feature encoding method of claim 6 , wherein the filtering information is derived based on the inversely transformed feature information and the extracted feature information.
8 . The feature encoding method of claim 6 , wherein the deriving the inversely transformed feature information comprises:
encoding the transformed feature information and decoding the encoded feature information; and
deriving the inversely transformed feature information by inversely transforming the decoded feature information.
9 . The feature encoding method of claim 6 , wherein the deriving the filtering information comprises:
dequantizing the inversely transformed feature information; and
deriving the filtering information based on the dequantized feature information.
10 . The feature encoding method of claim 6 , wherein the filtering information is derived based on the quantized feature information and the inversely transformed feature information.
11 . The feature encoding method of claim 6 ,
wherein the second syntax element is included in the filtering information based on the filtering being applied.
12 . The feature encoding method of claim 6 , wherein the filtering information is encoded into a feature level of the bitstream or encoded into a level higher than a feature level of the bitstream.
13 . A method of transmitting a bitstream generated by a feature encoding method, the feature encoding method comprising:
deriving transformed feature information based on feature information extracted from an image;
deriving inversely transformed feature information based on the transformed feature information; and
deriving filtering information based on the inversely transformed feature information,
wherein the deriving the transformed feature information comprises:
quantizing the extracted feature information; and
deriving the transformed feature information by transforming the quantized feature information,
wherein the filtering information includes quantized information including a first syntax element specifying whether filtering is applied and a second syntax element specifying a parameter of the filtering.