Multi-Port Display Compression to Cut Power and Boundary Artifacts
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Solution Overview
Problem
High-resolution display interfaces in portable devices face increased power consumption due to large data sizes, leading to shorter battery life, and existing compression methods can result in junction artifacts between partial display regions.
Innovation Solution
A data processing apparatus with multiple compressors and decompressors that employ different compression orders and inter-compressor communication to optimize compression across multiple display ports, reducing power consumption and mitigating junction artifacts by controlling compression rates and using pre- and post-processing to smooth boundaries.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If display resolution is increased to achieve higher display quality, then image quality is improved, but power consumption of the display interface increases
Solution Approach 1:
The display interface is divided into multiple independent display ports, each handling a portion of the total display data. This segmentation allows the system to transmit compressed data through multiple parallel channels, reducing the power consumption of each individual port while maintaining overall high-resolution display quality.
Solution Approach 2:
The patent applies data compression techniques to change the parameter of data size before transmission. By compressing the display data and adjusting compression rates for different regions, the system reduces the amount of data transmitted over the interface, thereby lowering power consumption while preserving essential image quality.
2Use of energy by moving object
If data compression is applied to reduce power consumption, then power consumption is reduced, but junction artifacts appear between partial display regions
Solution Approach 1:
The patent applies different compression rates to different regions of the display data. By identifying junction areas between partial display regions and applying lower compression rates or special processing to these areas, the system maintains higher quality at boundaries where artifacts are most likely to appear, while using higher compression rates in other areas to reduce overall power consumption.
Solution Approach 2:
The system performs preliminary processing on junction areas before compression, identifying and marking these regions. This preliminary action allows the compression algorithm to apply appropriate techniques specifically at boundaries, preventing artifact formation before it occurs while maintaining compression efficiency in non-junction areas.
3Use of energy by moving object
If multiple display ports are used to transmit compressed data, then power consumption is reduced, but compression coordination between ports becomes complex
Solution Approach 1:
The patent implements feedback mechanisms where compression information from one display port is communicated to other ports. This feedback allows each port to adjust its compression strategy based on the state of other ports, ensuring coordinated compression across all ports while maintaining power efficiency. The feedback loop enables automatic adaptation without requiring complex manual coordination.
Data Source
AI summary
A data processing apparatus has a first compressor, a second compressor, a first output interface, and a second output interface. The first compressor generates first compressed display data by performing compression upon display data of a first partial region of a frame according to a first compression order. The second compressor generates second compressed display data by performing compression upon display data of a second partial region of the frame according to a second compression order. There is a boundary between the first partial region and the second partial region. In a horizontal direction, the first compression order on one side of the first boundary is opposite to the second compression order on another side of the first boundary. The first and second output interfaces output the first and second compressed display data via a first display port and a second display port of a display interface, respectively.