Interface Conversion Circuit for HDMI-to-Display Timing Alignment
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Solution Overview
Problem
There is a mismatch in timing between high definition multimedia interface (HDMI) and display modules, with HDMI transmitting image signals at 4 pixels per clock while display modules require 2 pixels per clock, leading to potential loss of image signals due to processing speed discrepancies.
Innovation Solution
An interface conversion circuit comprising a storage unit, mapping unit, and deviation detection unit, along with optional write and read control units, synchronization unit, and clock domain conversion unit, to adjust and reorder image signals to match display module requirements, ensuring accurate signal transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If the HDMI transmits image signals at 4 pixels per clock, then the transmission speed is improved, but the display module cannot process the signals in time due to its requirement of 2 pixels per clock
Solution Approach 1:
The patent introduces an interface conversion circuit as an intermediary component between the HDMI and display module. This circuit includes a storage unit, mapping unit, and deviation detection unit that together convert the 4-pixels-per-clock signal from HDMI into a 2-pixels-per-clock signal suitable for the display module, resolving the timing mismatch while maintaining high transmission speed
Solution Approach 2:
The interface conversion circuit changes the timing parameter of the image signal from 4 pixels per clock to 2 pixels per clock. The mapping unit reorders pixel components and the deviation detection unit adjusts read/write timing to transform the signal characteristics to match the display module's requirements
2Adaptability or versatility
If the interface conversion circuit is added to resolve timing mismatch, then signal processing compatibility is improved, but the device complexity increases
Solution Approach 1:
The interface conversion circuit is segmented into three functional modules: storage unit for buffering, mapping unit for pixel reordering, and deviation detection unit for timing adjustment. This segmentation allows each module to perform a specific function, making the overall system more manageable and maintainable despite the added complexity
Data Source
AI summary
An interface conversion circuit, a method for processing signals, and a device are provided. The interface conversion circuit interface includes: a storage unit, configured to write a first image signal output by a multimedia module interface according to a write address signal, read the first image signal according to a read address signal, and output the first image signal; a mapping unit, configured to reorder pixel components of the received first image signal to obtain a second image signal meeting the display requirement of a display module interface, and transmitting the second image signal to the display module interface; and a deviation detection unit, configured to acquire the write address signal and the read address signal and adjust a read timing and a write timing of the storage unit according to the write address signal and the read address signal.