Power Estimation Circuit for Continuous Time Digital Signal Processing
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Solution Overview
Problem
Continuous time digital signal processing systems face challenges in efficiently estimating the instantaneous power of signals, which is crucial for voice activity detection and spectral information extraction, due to the asynchronous nature of amplitude representation in these systems.
Innovation Solution
A circuit and method that utilize a token comprising a change signal and a direction signal to generate an amplitude value, which is then used to calculate the instantaneous power using the formula x^2 ± 2x + 1, where x represents the amplitude value, enabling efficient power estimation in continuous time digital signal processing systems.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If conventional amplitude representation methods are used in continuous time digital signal processing systems, then the system can process analog information signals in an asynchronous manner, but the instantaneous power estimation becomes inefficient and meaningless for voice activity detection
Solution Approach 1:
The patent transforms the amplitude value x into instantaneous power using the mathematical transformation x² ± 2x + 1. This parameter change converts the asynchronous amplitude representation into a meaningful power value that can be effectively used for voice activity detection and spectral information extraction, resolving the information loss problem while maintaining processing efficiency
2Speed
If the system processes signals in continuous time without clock synchronization, then it can handle analog signals efficiently, but determining meaningful instantaneous power becomes challenging due to the asynchronous nature
Solution Approach 1:
The system uses the existing amplitude value x from the continuous time processing and self-generates the instantaneous power through the formula x² ± 2x + 1. This self-service approach allows the system to maintain its asynchronous processing speed while simultaneously obtaining accurate instantaneous power measurements needed for voice activity detection, without requiring external clock synchronization
Data Source
AI summary
A continuous time digital signal processing (CT DSP) token includes a first signal indicating a change has occurred and a second signal indicating a direction of the change. An amplitude generation circuit operates to generate an amplitude value x in response to the token. A power estimation circuit processes the amplitude value x to generate a digital power signal in accordance with the formula: x2±2x+1.