Matrix Switcher Bandwidth Reduction via CSC and DSC
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Solution Overview
Problem
Current ultra-high-definition signal switchers and distributors face challenges in maintaining high-resolution, lossless, and real-time signal quality due to increased parasitic capacitance and resistance, leading to signal attenuation, and existing solutions are costly and consume high power, while compression and decompression methods degrade signal quality, especially in applications requiring seamless switching.
Innovation Solution
A matrix switcher architecture comprising M transmitting side chips, K matrix switch chips, and N receiving side chips, where each chip includes signal receiving and transmitting circuits, and logic processors for Color Space Conversion (CSC) and Digital Stream Compression (DSC) processes, reducing bandwidth requirements and ensuring signal quality through compression and decompression, using SERDESs for high-speed data transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple MOS switches are connected in parallel and in series to achieve switching function, then the switching capability is improved, but the parasitic capacitance and resistance increase linearly, causing signal attenuation
Solution Approach 1:
The patent replaces traditional MOS switch-based signal switching with an optical domain switching approach. Optical switches or optical cross-connect devices are used to route optical signals directly, eliminating the need for electrical-to-optical conversion and the associated parasitic elements. This substitution resolves the contradiction by providing switching capability without the linear increase in parasitic capacitance and resistance that plagues electrical switch implementations.
2Reliability
If advanced chip manufacturing process and CDR circuit are used to maintain signal quality, then the signal quality is improved, but the cost and power consumption increase
Solution Approach 1:
The patent extracts the signal conversion and processing functions from complex electrical domain chips to simpler optical domain components. By using direct optical switching and transmission, the need for advanced chip manufacturing processes and complex CDR (Clock Data Recovery) circuits is eliminated or significantly reduced. The optical system maintains signal quality through inherent optical properties rather than requiring complex electrical compensation circuits, thereby reducing both cost and power consumption while preserving reliability.
3Quantity of substance
If ultra-high-definition signal is compressed and decompressed to reduce bandwidth, then the bandwidth requirement is reduced, but the signal quality is degraded and real-time performance is lost
Solution Approach 1:
The patent substitutes electrical signal compression/decompression with optical signal direct transmission. By maintaining signals in the optical domain throughout the switching and distribution system, the need for compression and decompression is eliminated. Optical fibers naturally support ultra-high-definition signals with their high bandwidth capacity, allowing lossless, real-time transmission without the quality degradation and latency introduced by compression algorithms. This resolves the contradiction by providing sufficient bandwidth through optical transmission rather than through lossy compression.
Data Source
AI summary
A matrix switcher is provided. A code rate of an ultra-high-definition video signal is reduced on the premise that the quality of the ultra-high-definition video signal is not affected through performing a Color Space Conversion (CSC) process and/or a Digital Stream Compression (DSC) process on the ultra-high-definition video signal at the transmitting side chip, thereby reducing a bandwidth required in conversion, switch and transmission of the ultra-high-definition video signal. A matrix switch chip with a low cost and general performance is used. Then, a corresponding DSC data decompression process and/or CSC process are performed at the receiving side to recover the performance of the ultra-high-definition video signal.