Display Controller Look-Up Table Segmentation for Pixel Precision
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Solution Overview
Problem
Existing display controllers in graphics processing systems face limitations in precision and flexibility when applying non-linear functions to pixels, requiring large memory blocks and fixed configurations that are inflexible and inefficient, especially when processing pixels with varying sizes and color components.
Innovation Solution
A programmable graphics system with a display controller that employs multiple separate look-up tables, allowing for on-the-fly configuration and combination of these tables based on the requirements of the video surface being processed, enabling greater precision and flexibility in applying linear or non-linear functions to pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single large look-up table is used to process all pixel data, then processing precision is improved, but memory requirements and device complexity increase significantly
Solution Approach 1:
The patent divides a single large look-up table into multiple smaller look-up tables, each processing a specific color component (R, G, B) or a portion of the color space. This segmentation reduces the memory burden of each individual table while collectively maintaining the precision of the original large table, directly resolving the contradiction between processing precision and device complexity
2Adaptability or versatility
If a fixed configuration of look-up tables is used, then device complexity is reduced, but adaptability to different pixel formats and processing functions is worsened
Solution Approach 1:
The patent implements dynamic configuration capabilities where the number, size, and arrangement of look-up tables can be adjusted based on the specific processing requirements. The system can adaptively allocate tables for different color components, adjust table dimensions according to pixel format requirements, and reconfigure the processing pipeline dynamically, thereby achieving high adaptability without permanently increasing device complexity
Solution Approach 2:
The look-up table architecture is designed to serve multiple functions: processing different color components (R, G, B), supporting various pixel formats (10-bit, 12-bit, 24-bit), and implementing different processing modes (color correction, gamma correction, thresholding). This multi-functionality allows a single flexible table configuration to replace multiple dedicated tables, enhancing adaptability while controlling device complexity
3Adaptability or versatility
If separate look-up tables are used for each color component, then processing flexibility is improved, but the number of tables and device complexity increase
Solution Approach 1:
The patent implements a flexible table allocation strategy where separate look-up tables are created only when and where needed. Instead of mandating separate tables for all color components in all scenarios, the system dynamically determines the optimal table configuration based on the specific processing requirements, using partial table separations only when they provide actual processing benefits, thereby achieving flexibility without excessive device complexity
Data Source
AI summary
According to one aspect, a display controller is included in a graphics processing system where the display controller includes a plurality of look up tables in a data path. According to one embodiment, each of the plurality of look up tables is configured to be coupled to a source of surfaces, each of the plurality of look up tables includes circuitry that is physically separate from circuitry included in others of the plurality of look up tables, and the display controller is configured to employ a combination including at least two of the plurality of look up tables to process a first component of a plurality of pixels included in a surface received from the source of surfaces.