Implantable Hearing System Biphasic Signal Error Detection
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Solution Overview
Problem
Implantable hearing systems, particularly for individuals with sensorineural hearing loss, face challenges in effectively transmitting digital audio signals due to interference from external influences like AC leakage, DC leakage, and electromagnetic interference, which can disrupt the data transfer between the implantable stimulator module and the secondary module, leading to errors in the biphasic information signal.
Innovation Solution
The implementation of an implantable medical system with an error detection mechanism in the stimulator module that identifies errors in the biphasic information signal, which includes a series of alternating positive and negative pulses, and initiates corrective actions to mitigate these errors, using a digital audio link and power link via a wire connection, ensuring reliable data transfer and stimulation signal delivery.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If digital audio signals are transmitted through a wire connection in an implantable hearing system, then data transfer between modules is enabled, but the transmission is disrupted by interference from AC leakage, DC leakage, and electromagnetic interference
Solution Approach 1:
The patent introduces an intermediary encoding scheme where digital audio data is converted into a biphasic pulse train format for transmission. This intermediary representation allows the data to be transmitted through the wire connection while being less susceptible to electromagnetic interference, as the differential nature of the biphasic pulses helps reject common-mode noise and interference signals.
Solution Approach 2:
The patent implements feedback mechanisms through error detection and correction protocols in the digital audio link. The receiving module detects errors in the transmitted biphasic pulse train and requests retransmission or applies correction algorithms, thereby maintaining reliable data transfer despite the presence of electromagnetic interference and leakage currents.
2Ease of operation
If a wire connection is used to connect the implantable stimulator module and secondary module, then power and data transfer are achieved, but errors occur in the biphasic information signal due to external influences
Solution Approach 1:
The patent uses an intermediary encoding format (biphasic pulse train) to represent digital audio data during transmission through the wire connection. This intermediary representation provides noise immunity and error resistance, allowing reliable power and data transfer while maintaining signal integrity despite external influences such as AC leakage and electromagnetic interference.
Solution Approach 2:
The patent employs error detection and correction protocols that prepare for potential errors beforehand. By implementing checksum verification, parity bits, or retransmission requests in advance, the system cushions against the occurrence of errors in the biphasic information signal, ensuring that data integrity is maintained even when interference occurs during transmission.
3Productivity
If the implantable secondary module generates and transmits a biphasic information signal, then digital audio data can be sent to the stimulator module, but errors in the signal can be introduced by interference
Solution Approach 1:
The patent employs an intermediary biphasic pulse train encoding scheme that efficiently transmits digital audio data while providing inherent noise immunity. This encoding method maintains high data transmission efficiency by directly mapping digital samples to pulse sequences, while the differential nature of the biphasic format protects against interference-induced errors, thereby preserving data accuracy.
Solution Approach 2:
The patent implements feedback mechanisms including error detection protocols and retransmission requests that maintain data accuracy during efficient transmission. When errors are detected in the received biphasic information signal, the system requests retransmission of the affected data packets, ensuring that no information is lost despite the presence of interference during high-speed data transfer.
Data Source
AI summary
Presented herein are implantable digital communication techniques for use in implantable systems, such as implantable hearing systems. An implantable system in accordance with embodiments presented herein includes an implantable stimulator module and an implantable secondary module connected to the implantable stimulator module via a wire connection. The implantable secondary module is configured to generate and send a biphasic information signal to the implantable stimulator module via the wire connection. An error detector in the implantable stimulator module is configured to detect when the biphasic information signal includes an error.