Multi-Channel Brain Interface Signal Compression for Wireless Transmission
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Solution Overview
Problem
Current medical devices for collecting and transmitting multi-channel physiological signals face challenges with large data volumes, leading to inconvenient wired transmission, bandwidth limitations in wireless transmission, increased power consumption, and thermal issues due to high power use.
Innovation Solution
A brain-computer interface device with multiple channels that processes physiological signals using pre-amplifiers, a multiplexer, analog-to-digital converter, memory, and a processor to generate compressed signals by deleting higher bit values of digital values corresponding to the same channel, allowing efficient wireless transmission and reducing power consumption and module volume.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If wired transmission is used to transmit large amounts of physiological signal data, then data transmission completeness is improved, but patient convenience and device portability deteriorate
Solution Approach 1:
The patent extracts and removes redundant information from the physiological signal data by identifying and eliminating repeated digital values across multiple channels. This data extraction approach reduces the overall data volume that needs to be transmitted, enabling wireless transmission while maintaining data completeness and reducing transmission burden.
2Ease of operation
If wireless transmission is used to improve patient convenience, then patient mobility is improved, but data transmission bandwidth and completeness deteriorate
Solution Approach 1:
The patent changes the data representation parameters by compressing multiple-channel physiological signal data into a more compact format. By identifying repeated digital values and reducing redundant information, the data is transformed into a compressed representation that fits within wireless transmission bandwidth limitations while preserving essential signal information.
3Reliability
If maximum transmission power is used to ensure data transmission, then data transmission reliability is improved, but power consumption and thermal energy increase
Solution Approach 1:
The patent extracts redundant data elements from multi-channel physiological signals by identifying repeated digital values across channels. This removal of redundant information significantly reduces the total data volume requiring transmission, thereby reducing the power consumption and thermal energy generation of the wireless transmission system while maintaining transmission reliability.
4Productivity
If data compression is applied to reduce transmission volume, then transmission efficiency is improved, but signal distortion may occur
Solution Approach 1:
The patent uses a copying approach where repeated digital values from one channel are identified and referenced instead of being fully transmitted across multiple channels. This creates a compressed representation that efficiently uses transmission bandwidth while maintaining signal accuracy, as the original full-resolution data can be reconstructed at the receiving end using the copied reference values.
Data Source
AI summary
A brain-computer interface device includes a plurality of pre-amplifiers are configured to amplify physiological signals corresponding to channels to output amplified signals; a multiplexer is configured to output, according to a control signal and a clock signal, the amplified signals; an analog-to-digital converter is configured to convert, according to the clock signal including clocks, the output of the multiplexer into a digital signal including a plurality of digital values corresponding to the clocks, wherein each of the digital values includes bit values; a memory is configured to store the digital signal; and a processor s configured to: add a header corresponding to one channel to each of the digital values according to the clock signal; and delete bit values of higher bits of each of the digital values corresponding to the same channel that are the same as those of a previous digital value, to output a compressed signal.