Video Coding Picture Header Signaling for Slice Type
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality images/videos, such as 4K and 8K UHD, and immersive media like VR/AR, necessitates a highly efficient image/video compression technique to reduce transmission and storage costs, while existing methods are inefficient in signaling and omitting unnecessary information during inter and intra prediction.
Innovation Solution
A method and apparatus for efficiently performing inter and intra prediction in image/video coding by signaling necessary information in the picture header, omitting unnecessary data, and improving overall compression efficiency, specifically by using flags to indicate the presence of information needed for inter or intra prediction operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If all prediction information is signaled in the picture header for high-resolution video, then prediction accuracy is improved, but transmission cost and bitstream size increase
Solution Approach 1:
The patent changes the parameter of information signaling by using flags (binary parameters) to indicate the presence or absence of prediction information in the picture header. This allows the system to adaptively control the amount of transmitted data based on whether inter or intra prediction is used, reducing bitstream size while maintaining prediction accuracy when needed
Solution Approach 2:
The patent introduces dynamic signaling where the picture header adaptively includes or excludes prediction information based on the prediction mode (inter or intra). This dynamic approach allows the system to optimize between transmission efficiency and prediction accuracy for each picture or slice, rather than using a static all-inclusive approach
2Productivity
If prediction information is omitted to reduce bitstream size, then transmission efficiency is improved, but prediction operation reliability deteriorates
Solution Approach 1:
The patent uses binary flags as parameters to control the inclusion of prediction information. By changing the flag value based on the prediction mode, the system ensures that necessary information is always present for the selected prediction type, maintaining reliability while optimizing transmission efficiency
Solution Approach 2:
The picture header structure is designed to self-adapt to the prediction mode requirements. The flags automatically indicate what information is needed, allowing the decoding system to reliably reconstruct the prediction data without external control, ensuring both efficiency and reliability
3Measurement precision
If slice type information is always signaled, then decoding accuracy is improved, but device complexity increases
Solution Approach 1:
The patent uses flags as simple binary parameters to indicate slice type information rather than transmitting detailed slice type data. This parameter simplification reduces processing complexity while maintaining sufficient decoding accuracy by only signaling when slice type information is relevant to the prediction operation
4Loss of information
If redundant information is included in the picture header, then information completeness is improved, but loss of information (useful data) increases
Solution Approach 1:
The patent extracts only the essential prediction information needed for the specific prediction mode (inter or intra) and excludes redundant information. By using flags to indicate what information is present, the system extracts and transmits only what is necessary, maintaining information completeness for the selected mode while reducing overall transmission data and energy consumption
Data Source
AI summary
A video decoding method performed by a video decoding device according to the present document may comprise the steps of: acquiring image information from a bitstream, wherein the image information includes a picture header associated with a current picture, and the current picture includes multiple slices; on the basis of the picture header, acquiring at least one of a first flag indicating whether information required for an inter-prediction operation exists in the picture header and a second flag indicating whether information required for an intra-prediction operation exists in the picture header; on the basis of at least one of the first flag and the second flag, generating prediction samples by performing at least one of intra-prediction and inter-prediction with respect to a current block in the current picture; generating residual samples on the basis of residual information acquired from the image information; and generating reconstruction samples on the basis of the prediction samples and the residual samples.