Video Decoder Reference Picture Property Matching
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Next-generation video contents with high spatial resolution, high frame rate, and high dimensionality require efficient coding tools to manage increased memory storage, memory access rate, and processing power, particularly in decoding images and pictures with different properties such as resolution, bit-depth, color format, dynamic range, and aspect ratio.
Innovation Solution
A video decoding method and device that determine if current and reference pictures have different properties, transforming the reference picture to match the current picture's properties, and performing inter-prediction in predetermined blocks using the transformed reference picture, which includes scaling, downsampling, upsampling, and dynamic range or bit-depth transformation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If inter-prediction is performed using reference pictures with different properties (resolution, bit-depth, color format, dynamic range, aspect ratio), then decoding flexibility and adaptability are improved, but decoding accuracy and picture quality deteriorate
Solution Approach 1:
The decoding process is segmented into distinct stages: property difference detection, selective transformation (scaling, color space conversion, bit-depth adjustment), and inter-prediction. This segmentation allows the system to handle different picture properties independently while maintaining overall decoding accuracy.
Solution Approach 2:
The patent dynamically changes multiple parameters of the reference picture including resolution (scaling), color format (color space conversion), bit-depth, and dynamic range to match the current picture properties before performing inter-prediction, thereby resolving the contradiction between adaptability and accuracy.
2Manufacturing precision
If reference pictures are transformed to match current picture properties, then picture quality is maintained, but processing complexity and computational load increase
Solution Approach 1:
The patent performs property matching transformations on reference pictures in advance, before the actual inter-prediction process. This preliminary action ensures that reference pictures are pre-prepared in the correct format, reducing complexity during the main decoding workflow.
Solution Approach 2:
The decoding system automatically detects property differences and performs necessary transformations without external intervention. The system self-adjusts by comparing picture properties and applying appropriate transformations (scaling, color conversion, bit-depth adjustment) only when needed, avoiding unnecessary processing complexity.
3Reliability
If property detection and transformation processes are added to the decoding pipeline, then decoding reliability is improved, but processing time and computational resources increase
Solution Approach 1:
The patent extracts and processes only the necessary picture properties (resolution, color format, bit-depth, dynamic range) that differ between reference and current pictures, rather than processing all properties. This selective extraction approach maintains reliability while minimizing processing time.
Solution Approach 2:
The property detection and transformation mechanism serves multiple functions: it detects property differences, determines transformation types, executes transformations, and validates results. This multi-functionality consolidates multiple processes into a unified system, improving reliability without proportionally increasing processing time.
Data Source
AI summary
The present invention provides an image encoding/decoding method and a device for same. In particular, the image decoding method may comprise the steps of: determining if the properties of a current picture and a reference picture differ; converting the reference picture to have the same properties as the current picture when the properties of the current picture and reference picture differ; and performing inter-prediction on the current picture by predetermined block unit by means of the converted reference picture.