Method and device for encoding/decoding image by using palette mode, and recording medium
AssigneeElectronics and Telecommunications Research Institute
InventorsWoong Lim, Gun Bang
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Abstract
Disclosed herein are a method, an apparatus and a storage medium for image encoding/decoding using a palette mode. Prediction using a palette mode may be performed for a target block. Various types of predictions may be performed for the target block, and pieces of information to be signaled from an encoding apparatus to a decoding apparatus may be changed depending on the type of prediction to be performed for the target block. Determination of the pieces of information to be signaled may be optimized for the case where a palette mode is to be used for the target block, and thus efficiency of image encoding and decoding may be improved.
Claims16
An image encoding method, comprising:
- determining a prediction mode for a chroma component of a target block;
- and
- performing encoding on the chroma component of the target block based on the prediction mode, wherein
- when a partitioning structure of a luma component of the target block is identical to a partitioning structure of the chroma component of the target block, whether information about the prediction mode is to be encoded is determined based on whether a palette mode is used for the chroma component of the target block.
An image decoding method, comprising:
- determining a prediction mode for a chroma component of a target block;
- and
- performing decoding on the chroma component of the target block based on the prediction mode, wherein
- when a partitioning structure of a luma component of the target block is identical to a partitioning structure of the chroma component of the target block, whether information about the prediction mode is to be decoded is determined based on whether a palette mode is used for the chroma component of the target block.
A method for sending a bitstream, the method comprising:
- generating the bitstream comprising encoded information about a chroma component of a target block;
- and
- transmitting the bitstream,
- wherein the encoded information is generated by:
- determining a prediction mode for the chroma component of the target block;
- and
- performing encoding on the chroma component of the target block based on the prediction mode,
- and wherein,
- when a partitioning structure of a luma component of the target block is identical to a partitioning structure of the chroma component of the target block, whether the bitstream comprises information about the prediction mode is determined based on whether a palette mode is used for the chroma component of the target block.
A non-transitory computer-readable recording medium storing program instructions for transmitting a bitstream, the program instructions comprising:
- an instruction to perform generation of the bitstream;
- and
- an instruction to transmit the bitstream,
- wherein the generation of the bitstream comprises:
- generating the bitstream comprising encoded information about a chroma component of a target block generated by a video encoding method,
- wherein the video encoding method comprises:
- determining a prediction mode for the chroma component of the target block;
- and
- performing encoding on the chroma component of the target block based on the prediction mode,
- wherein when a partitioning structure of a luma component of the target block is identical to a partitioning structure of the chroma component of the target block, whether the bitstream comprises information about the prediction mode is determined based on whether a palette mode is used for the chroma component of the target block.
Dependencies are inferred from the claim text.