Geometry Shader Unit for Variable Length Data Compression
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Solution Overview
Problem
Conventional graphics processors are inefficient in implementing algorithms with variable input and output, leading to suboptimal data compression and increased memory and bandwidth requirements for image data processing.
Innovation Solution
A multi-threaded graphics processor configured as a geometry shader is used to implement lossless compression algorithms with variable output, offloading data compression from the CPU and reducing memory and bandwidth needs by processing input data to produce variable length compressed data that can be decompressed to its original form.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional graphics processors are used to implement data compression algorithms, then the processing capability is limited, but the memory and bandwidth requirements increase
Solution Approach 1:
The geometry shader unit, originally designed for graphics processing, is repurposed to perform data compression algorithms. This multi-functional approach allows the same hardware to handle both graphics rendering and data compression tasks, improving productivity without requiring additional specialized hardware that would increase memory and bandwidth requirements
Solution Approach 2:
The invention utilizes the dynamic nature of the geometry shader unit, which can emit a variable number of output vertices based on input conditions. This dynamic output capability is leveraged to implement variable-length compression algorithms where the output size adapts to the input data characteristics, achieving efficient compression while maintaining flexibility in memory usage
2Productivity
If the geometry shader unit is used to implement variable length compression algorithms, then processing efficiency improves, but the complexity of the system increases
Solution Approach 1:
The geometry shader unit is configured to automatically handle the compression algorithm execution without requiring external control logic. The shader program embedded in the geometry shader unit self-manages the compression process, including variable-length output generation, thereby improving processing efficiency while avoiding the complexity of additional control systems
Solution Approach 2:
The compression algorithm logic is merged directly into the geometry shader program, combining the graphics processing functionality with data compression functionality in a single integrated unit. This merging eliminates the need for separate compression hardware or complex inter-component communication, reducing system complexity while maintaining high processing efficiency
Data Source
AI summary
A system and method uses the capabilities of a geometry shader unit within the multi-threaded graphics processor to offload data compression computations from a central processing unit (CPU), reduce the memory needed to store image data, and reduce the bandwidth needed to transfer image data between graphics processors and between a graphics processor and a system memory. The multi-threaded graphics processor is also configured to compress data for use in memory paging and when data is relocated to lie within an accessible memory aperture. The data is losslessly compressed using a geometry shading program to produce variable length compressed data.