Video encoding and decoding based on resampling chroma signals
AssigneesHyundai Motor Company, Kia Corporation, Ewha University-Industry Collaboration Foundation
InventorsJe Won Kang, Seung Wook Park, Wha Pyeong Lim
Life of this patent
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Abstract
Disclosed is a video encoding/decoding method for performing inter-prediction on a current picture by resampling and referring to luma signals and chroma signals of a reference picture to improve encoding efficiency in video encoding and decoding for a frame having luma signals and chroma signals in various sample formats in one video sequence.
Claims18
A video decoding method for a current block in a current picture including chroma signals having a resolution and a chroma format separate from luma signals, performed by a video decoding device, the video decoding method comprising:
- obtaining size information and a chroma format of the current picture and generating a resolution for the chroma signals of the current picture from the size information and the chroma format;
- obtaining decoded residual signals and inter-prediction information regarding the current block, wherein the inter-prediction information includes a reference picture index and a motion vector;
- obtaining a resolution and a chroma format for chroma signals of a reference picture designated by the reference picture index;
- when the resolution or the chroma format for the chroma signals of the current picture is different from the resolution or the chroma format for the chroma signals of the reference picture, resampling the chroma signals of the reference picture to match the resolution and the chroma format for the chroma signals of the reference picture and the resolution and the chroma format for the chroma signals of the current picture;
- generating predicted signals for the current block based on the inter-prediction information;
- and
- generating a reconstructed block by adding the predicted signals to the residual signals.
A video encoding method for a current block in a current picture including chroma signals having a resolution and a chroma format separate from luma signals, performed by a video encoding device, the video encoding method comprising:
- obtaining size information and a chroma format of the current picture and generating a resolution for the chroma signals of the current picture from the size information and the chroma format;
- obtaining inter-prediction information regarding the current block, wherein the inter-prediction information includes a reference picture index and a motion vector;
- obtaining a resolution and a chroma format for chroma signals of a reference picture designated by the reference picture index;
- when the resolution or the chroma format of the chroma signals of the current picture is different from the resolution or the chroma format of the chroma signals of the reference picture, resampling the chroma signals of the reference picture to match the resolution and the chroma format of the chroma signals of the reference picture and the resolution or the chroma format of the chroma signals of the current picture;
- generating predicted signals for the current block based on the inter-prediction information;
- and
- generating residual signals by subtracting the predicted signals from the current block.
Dependencies are inferred from the claim text.