JP2020150530A5

JP2020150530A5 -

Info

Publication number: JP2020150530A5
Application number: JP2019171786A
Authority: JP
Filing date: 2019-09-20
Publication date: 2022-09-21

Claims

An image encoding device that encodes a moving image in units of blocks using inter prediction based on inter prediction information ,
an encoding information storage unit that stores inter prediction information used in inter prediction of encoded blocks in a history motion vector predictor candidate list ;
a spatial merging candidate deriving unit that derives a spatial merging candidate from inter prediction information of blocks that are spatially adjacent to a block to be encoded;
a temporal merge candidate deriving unit that derives a temporal merge candidate from inter prediction information of a block located at or near the same position as the current block in a picture different from the current block;
a history merge candidate derivation unit that derives a history merge candidate from inter prediction information stored in the history motion vector predictor candidate list ;
with
The history merge candidate deriving unit compares a predetermined number of last inter prediction information among the inter prediction information stored in the history motion vector predictor candidate list with the inter prediction information of the spatial merge candidate , If the values of the prediction information are different, the history merge candidate is determined, and inter prediction information ahead of the predetermined number from the back is determined as the history merge candidate without being compared with the inter prediction information of the spatial merge candidate. An image encoding device characterized by:

An image encoding method for encoding a moving image in units of blocks using inter prediction based on inter prediction information,
a coding information storing step of storing inter prediction information used in inter prediction of an encoded block in a historical motion vector predictor candidate list;
a spatial merge candidate derivation step of deriving a spatial merge candidate from inter-prediction information of blocks spatially adjacent to a block to be coded;
a temporal merge candidate deriving step of deriving a temporal merge candidate from inter prediction information of a block located at or near the same position as the current block in a picture different from the current block;
a history merge candidate derivation step of deriving a history merge candidate from inter prediction information stored in the history motion vector predictor candidate list;
with
In the history merge candidate deriving step, among the inter prediction information stored in the history motion vector predictor candidate list, a predetermined number of last inter prediction information are compared with the inter prediction information of the spatial merge candidate. If the values of the prediction information are different, the history merge candidate is determined, and the inter prediction information ahead of the predetermined number from the back is determined as the history merge candidate without being compared with the inter prediction information of the spatial merge candidate.
An image encoding method characterized by:

An image encoding program for encoding a moving image block by block using inter prediction based on inter prediction information,
a coding information storing step of storing inter prediction information used in inter prediction of an encoded block in a historical motion vector predictor candidate list;
a spatial merge candidate derivation step of deriving a spatial merge candidate from inter-prediction information of blocks spatially adjacent to a block to be coded;
a temporal merge candidate deriving step of deriving a temporal merge candidate from inter prediction information of a block located at or near the same position as the current block in a picture different from the current block;
causing a computer to execute a history merge candidate derivation step of deriving a history merge candidate from inter prediction information stored in the history motion vector predictor candidate list;
In the history merge candidate deriving step, among the inter prediction information stored in the history motion vector predictor candidate list, a predetermined number of last inter prediction information are compared with the inter prediction information of the spatial merge candidate. If the values of the prediction information are different, the history merge candidate is determined, and the inter prediction information ahead of the predetermined number from the back is determined as the history merge candidate without being compared with the inter prediction information of the spatial merge candidate.
An image encoding program characterized by:

An image decoding device that decodes an encoded bit string encoded using inter prediction for each block of a moving image,
a coding information storage unit that stores inter prediction information used in inter prediction of a decoded block in a historical motion vector predictor candidate list;
a spatial merging candidate deriving unit that derives a spatial merging candidate from inter prediction information of blocks that are spatially adjacent to a decoding target block;
a temporal merge candidate deriving unit that derives a temporal merge candidate from inter prediction information of a block located at or near the same position as the decoding target block in a picture different from the decoding target block;
a history merge candidate derivation unit that derives a history merge candidate from inter prediction information stored in the history motion vector predictor candidate list;
with
The history merge candidate deriving unit compares a predetermined number of inter prediction information from the last among the inter prediction information stored in the history motion vector predictor candidate list with the inter prediction information of the spatial merge candidate. If the values of the prediction information are different, the history merge candidate is determined, and the inter prediction information ahead of the predetermined number from the back is determined as the history merge candidate without being compared with the inter prediction information of the spatial merge candidate.
An image decoding device characterized by:

An image decoding method for decoding an encoded bit string encoded using inter prediction for each block of a moving image,
a coding information storing step of storing inter-prediction information used in inter-prediction of a decoded block in a historical motion vector predictor candidate list;
a spatial merge candidate derivation step of deriving a spatial merge candidate from inter-prediction information of blocks spatially adjacent to a decoding target block;
a temporal merge candidate deriving step of deriving a temporal merge candidate from inter prediction information of a block located at or near the same position as the decoding target block in a picture different from the decoding target block;
a history merge candidate derivation step of deriving a history merge candidate from inter prediction information stored in the history motion vector predictor candidate list;
with
In the history merge candidate deriving step, among the inter prediction information stored in the history motion vector predictor candidate list, a predetermined number of last inter prediction information are compared with the inter prediction information of the spatial merge candidate. If the values of the prediction information are different, the history merge candidate is determined, and the inter prediction information ahead of the predetermined number from the back is determined as the history merge candidate without being compared with the inter prediction information of the spatial merge candidate.
An image decoding method characterized by:

An image decoding program for decoding a coded bit string obtained by coding a moving image block by block using inter prediction,
a coding information storing step of storing inter-prediction information used in inter-prediction of a decoded block in a historical motion vector predictor candidate list;
a spatial merge candidate derivation step of deriving a spatial merge candidate from inter-prediction information of blocks spatially adjacent to a decoding target block;
a temporal merge candidate deriving step of deriving a temporal merge candidate from inter prediction information of a block located at or near the same position as the decoding target block in a picture different from the decoding target block;
causing a computer to execute a history merge candidate derivation step of deriving a history merge candidate from inter prediction information stored in the history motion vector predictor candidate list;
In the history merge candidate deriving step, among the inter prediction information stored in the history motion vector predictor candidate list, a predetermined number of last inter prediction information are compared with the inter prediction information of the spatial merge candidate. If the values of the prediction information are different, the history merge candidate is determined, and the inter prediction information ahead of the predetermined number from the back is determined as the history merge candidate without being compared with the inter prediction information of the spatial merge candidate.
An image decoding program characterized by:

A bitstream generated according to the image coding method of claim 2.