Asynchronous Voice Frequency Tracking via Segmented Sampling
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Solution Overview
Problem
Current methods for tracking the fundamental frequency of a voice signal in stroboscopy are complex and require a large structure, making it difficult to record and analyze the signal efficiently, especially when the analysis needs to be done at different locations or asynchronously to the stroboscope's operation.
Innovation Solution
A method and apparatus where a sampling device collects voice signal data, forms data packets, and sends them to a calculating device to determine the fundamental frequency, allowing the timer to be set based on this frequency, which generates a trigger signal for the stroboscope, enabling asynchronous determination and reducing the complexity of the system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the fundamental frequency analysis is performed at the same location as voice signal recording, then real-time tracking is achieved, but the recording apparatus structure becomes complex and large
Solution Approach 1:
The system is divided into two separate functional modules: a sampling device that records voice signals and a calculating device that performs fundamental frequency analysis. These modules can be located at different physical positions, allowing the recording apparatus to remain simple while real-time tracking is maintained through data packet transmission and timer-based synchronization.
2Device complexity
If the fundamental frequency determination is performed asynchronously to stroboscope driving, then the system structure is simplified, but synchronization between frequency analysis and stroboscope operation must be maintained
Solution Approach 1:
The calculating device determines the fundamental frequency asynchronously from the voice signal sampling data, then feeds back this frequency information to the sampling device. The sampling device uses this feedback to set a timer that generates trigger signals synchronized to the fundamental frequency, ensuring reliable coordination between frequency analysis and stroboscope operation despite asynchronous processing.
Solution Approach 2:
The system performs preliminary frequency analysis on collected voice signal data packets before using the results to control the stroboscope. The fundamental frequency is determined from a buffer of sampling data, and this preliminary determination is then used to set the timer for subsequent synchronized operation, allowing asynchronous processing while maintaining operational coordination.
Data Source
AI summary
The invention relates to a method and an apparatus for tracking a fundamental frequency of a voice signal. A sampling device samples a voice signal of a test person for a predetermined period of time (S1), thus obtaining sampling data of the voice signal, forms a data packet from the sampling data (S2), and sends the data packet to a calculating device (S3). The calculating device receives the data packet (S5) and calculates a fundamental frequency of the voice signal by means of the sampling data contained in the data packet (S6). The sampling device sets a timer based on the fundamental frequency calculated by the calculating device and outputs a trigger signal upon expiration of the timer (S11).