Picture Header Flag Signaling for Inter/Intra Video Prediction
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Solution Overview
Problem
The increasing demand for high-resolution, high-quality image/video content, particularly in virtual reality and augmented reality, leads to higher data transmission and storage costs due to the increased amount of information required, necessitating a more efficient compression technique.
Innovation Solution
A method and apparatus for enhancing image/video coding efficiency by optimizing inter prediction and intra prediction processes, reducing unnecessary signaling, and skipping irrelevant flags during image/video coding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high resolution and high quality image/video coding is performed, then image quality is improved, but transmission and storage costs increase
Solution Approach 1:
The patent extracts and transmits only the necessary prediction information (flags indicating presence of inter/intra prediction) rather than all possible coding parameters. This selective extraction reduces the bitstream overhead while maintaining high-quality reconstruction capability.
Solution Approach 2:
The patent dynamically adapts the prediction mode selection and information signaling based on the actual content characteristics of each picture or slice. The encoder chooses between inter and intra prediction modes adaptively, and the decoder reconstructs accordingly, optimizing compression for varying content types.
2Measurement precision
If comprehensive prediction information is signaled in picture header, then decoding accuracy is improved, but signaling overhead increases
Solution Approach 1:
The patent extracts only the essential prediction mode indication (through flags) in the picture header, rather than signaling complete prediction parameters. The actual prediction is performed using reference pictures or intra-block information, minimizing header overhead while preserving decoding accuracy.
Solution Approach 2:
The decoder performs prediction operations using locally available reference pictures and previously decoded blocks, without requiring extensive parameter signaling from the encoder. The system serves itself by utilizing already-decoded data for prediction, reducing the information that must be transmitted.
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, the image information including a picture header associated with the current picture including a plurality of slices; parsing, from the picture header, at least one of a first flag indicating whether information necessary for an inter-prediction operation for a decoding process is present in the picture header, or a second flag indicating whether information necessary for an intra-prediction operation for the decoding process is present in the picture header; generating prediction samples by performing at least one of intra-prediction or inter-prediction for the slices in the current picture on the basis of at least one of the first flag or the second flag; and generating reconstructed samples on the basis of the prediction samples.