Audio Frequency Feedback Tuning for Buffer-Level Accuracy
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Solution Overview
Problem
Conventional methods for adjusting audio frequency lack precision in controlling adjustment time and magnitude, and rely on inaccurate parameters, leading to discrepancies between calculated and actual frequencies.
Innovation Solution
A method involving a two-step adjustment process using a frequency feedback circuit to perform a first coarse tuning procedure followed by a second fine tuning procedure, adjusting the initial frequency based on variations in temporary data storage within a buffering unit, with different adjustment periods for each step.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If audio frequency is adjusted using audio tracking method with set values and parameters, then the adjustment process is simple to implement, but the adjustment time and magnitude cannot be precisely controlled
Solution Approach 1:
The patent implements a feedback mechanism by monitoring the water level value (temporary data storage) of the buffering unit and using it to calculate frequency correction amounts. The frequency feedback circuit continuously adjusts the audio frequency based on the buffering unit's water level variations, enabling precise control of both adjustment time and magnitude while maintaining implementation simplicity.
2Ease of operation
If audio frequency is calculated using audio sampling frequency method with Maud and Naud parameters, then the calculation process is straightforward, but the adjusted frequency differs from actual frequency due to parameter errors
Solution Approach 1:
The patent replaces parameter-based calculation with a feedback-based adjustment system. Instead of relying on potentially erroneous Maud and Naud parameters, the system monitors the actual buffering unit water level and adjusts frequency in real-time based on observed variations, significantly improving reliability while keeping the operation simple through automatic closed-loop control.
Solution Approach 2:
The system uses the buffering unit's own water level information to self-adjust the audio frequency. The frequency feedback circuit automatically calculates correction amounts based on the buffering unit's temporary data storage variations, enabling the system to self-correct frequency deviations without external intervention or reliance on pre-set parameters.
3Productivity
If a single adjustment procedure is used for audio frequency, then the process is simple and quick, but the accuracy of frequency adjustment is insufficient
Solution Approach 1:
The patent divides the frequency adjustment process into two distinct procedures: a first adjustment procedure for rapid coarse tuning that quickly brings the frequency close to the target, and a second adjustment procedure for precise fine-tuning that eliminates remaining errors. This segmentation maintains overall speed while significantly improving final accuracy.
Solution Approach 2:
The first adjustment procedure performs preliminary action by rapidly adjusting the frequency to near-target values before the second procedure refines it. This preliminary coarse adjustment reduces the burden on the second procedure, enabling faster overall convergence while achieving high precision.
Data Source
AI summary
A method for adjusting audio frequency includes steps of: obtaining initial frequency and temporary data storage of audio data input to a buffering unit; performing a first adjustment procedure on initial frequency to obtain a first variation of temporary data storage corresponding to a first change of initial frequency; calculating a first frequency correction amount according to first variation and a first period of first adjustment procedure; adjusting initial frequency into first frequency according to first frequency correction amount; inputting first frequency into buffering unit; performing a second adjustment procedure on first frequency to obtain a second variation of temporary data storage corresponding to a second change of first frequency; calculating a second frequency correction amount according to second variation and a second period of second adjustment procedure, which first period is less than second period; and adjusting first frequency into target frequency according to second frequency correction amount.