Orthogonal Transform Data Path Switching for Low-Latency Image Coding
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing image processing methods, particularly in hardware implementation, suffer from increased processing delays due to the need for multiple cycles in orthogonal transform and inverse orthogonal transform processes, especially when using methods like DST-7/DCT-8, which require rearrangement of two-dimensional residual signals.
Innovation Solution
The proposed solution involves switching the data path of one-dimensional input signal arrays in a forward or reverse direction and performing matrix operations using a combination of selectors and matrix operation units to reduce processing delays, utilizing the symmetry properties of DST-7 and DCT-8 transforms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If DST-7/DCT-8 orthogonal transform is implemented using conventional methods, then transform accuracy is maintained, but processing delay increases due to requiring at least two cycles
Solution Approach 1:
The patent applies preliminary action by pre-arranging the data path configuration before transform execution. The selection unit is pre-configured with multiple data paths that can be selectively activated based on the transform type (DST-7 or DCT-8), allowing the system to prepare the optimal processing route in advance and execute the transform in a single cycle without runtime reconfiguration delays
Solution Approach 2:
The patent implements dynamics by making the data path configuration adaptable and switchable. The selection unit dynamically reconfigures the data flow direction and processing routes based on the specific transform requirements, enabling the system to optimize its structure for each transform type while maintaining single-cycle execution capability
2Productivity
If two-dimensional residual signals are rearranged before orthogonal transform, then transform efficiency is improved, but processing delay increases due to additional rearrangement cycles
Solution Approach 1:
The patent merges the data rearrangement operation with the orthogonal transform operation into a unified processing step. The selection unit integrates the reordering function directly into the transform data path, eliminating the need for separate rearrangement cycles and achieving both efficiency improvement and delay reduction simultaneously
Solution Approach 2:
The selection unit is designed with multi-functionality to handle both data rearrangement and orthogonal transform operations within a single processing cycle. This universal component can selectively configure data paths for different transform types (DST-7, DCT-8, DCT-2) while simultaneously performing the necessary signal reordering, reducing the total number of processing cycles required
Data Source
AI summary
The present disclosure relates to an image processing device and method capable of reducing an increase in processing delay.A data path of a one-dimensional input signal array of residual data is switched in a forward direction or a reverse direction, and matrix operation of one-dimensional orthogonal transform is performed on the one-dimensional input signal array input via the switched data path. The present disclosure can be applied to, for example, an image processing device, an image coding device, an image decoding device, a transmission device, a reception device, a transmission/reception device, an information processing device, an imaging device, a regeneration device, an electronic apparatus, an image processing method, an information processing method, or the like.