Sound Reproduction Device Error Control Circuit Abnormality Detection
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Solution Overview
Problem
Existing sound reproduction systems fail to effectively suppress abnormal noise caused by connection and communication interface abnormalities between audio LSIs and speakers, leading to unnecessary sound reproduction stoppages due to false detection and inability to detect communication interface issues.
Innovation Solution
A sound reproduction device with a sound reproduction control circuit, a first communication interface circuit, a counter circuit, and an error control circuit that independently detects and manages communication interface abnormalities, preventing sound reproduction stoppages by distinguishing between genuine and false abnormality detections.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If connection abnormalities between audio LSI and speaker are detected to suppress abnormal noise, then abnormal noise is reduced, but false detection occurs causing unnecessary sound reproduction stoppages
Solution Approach 1:
The patent applies preliminary action by detecting communication interface abnormalities before they cause false abnormality detections. The counter circuit counts the number of abnormality detection signals within a predetermined time period, and only stops sound reproduction when the count reaches a threshold, preventing premature stops due to transient or false detections.
Solution Approach 2:
The patent implements feedback through the counter circuit that continuously monitors and counts abnormality detection signals. This feedback mechanism allows the system to distinguish between transient false detections and genuine, persistent abnormalities by comparing the count against a predetermined threshold, thereby maintaining reliable sound reproduction.
2Loss of time
If abnormality detection is performed during audio output to determine DC offset abnormalities quickly, then determination duration is shortened, but false detection risk increases
Solution Approach 1:
The patent applies preliminary action by performing abnormality detection during audio output when the system is most vulnerable to false detections. By detecting abnormalities in this critical period and using the counter circuit to verify persistence, the system achieves fast determination while maintaining accuracy through the threshold-based verification mechanism.
Solution Approach 2:
The patent uses feedback through the counter circuit to verify abnormality detections made during audio output. The counter continuously monitors detection signals and only confirms abnormalities when the count reaches the predetermined threshold, providing both rapid detection and accurate verification during the critical audio output period.
3Object-affected harmful factors
If sound reproduction stops immediately upon abnormality detection to prevent abnormal noise, then abnormal noise is suppressed, but legitimate audio output is interrupted due to false detections
Solution Approach 1:
The patent applies preliminary action by using the counter circuit to verify the persistence of abnormality detections before stopping sound reproduction. The counter counts detection signals within a predetermined time period, and only stops reproduction when the threshold is reached, preventing premature stops due to transient false detections while still responding quickly to genuine abnormalities.
Solution Approach 2:
The patent implements feedback through the counter circuit that continuously monitors abnormality detection signals. This feedback mechanism provides a buffer against false detections by requiring multiple confirmed signals within the predetermined time period before triggering a stop, thereby maintaining sound reproduction continuity while still preventing abnormal noise.
Data Source
AI summary
A sound reproduction device including a sound reproduction control circuit that performs a required computation on audio source data so as to generate sound reproduction data to send to a speaker; a first communication interface circuit that performs communication with a control device; a counter circuit whose count operation is controlled by a control signal received from the control device through the first communication interface circuit, and that outputs a state of the count operation; and an error control circuit that stops generation of the sound reproduction data by the sound reproduction control circuit based on the state of the count operation.