18154549. Stereo Audio Signal Delay Estiamtion Method and Apparatus simplified abstract (HUAWEI TECHNOLOGIES CO., LTD.)
Stereo Audio Signal Delay Estiamtion Method and Apparatus
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Inventor(s)
Stereo Audio Signal Delay Estiamtion Method and Apparatus - A simplified explanation of the abstract
This abstract first appeared for US patent application 18154549 titled 'Stereo Audio Signal Delay Estiamtion Method and Apparatus
Simplified Explanation
The patent application describes a method for estimating the delay between stereo audio signals. The method uses different algorithms based on the type of noise signal present in the audio frame.
- The method estimates the inter-channel time delay (ITD) of a stereo audio signal.
- It uses a first algorithm when the noise signal type is coherent and a second algorithm when the noise signal type is diffuse.
- The first algorithm weights the frequency domain cross power spectrum using a first weighting function with a specific construction factor.
- The second algorithm weights the frequency domain cross power spectrum using a second weighting function with a different construction factor.
Potential Applications
- Audio signal processing and analysis
- Sound recording and production
- Noise cancellation systems
- Audio equipment calibration
Problems Solved
- Accurate estimation of inter-channel time delay in stereo audio signals
- Differentiating between coherent and diffuse noise signals
- Improving the quality of audio processing and analysis
Benefits
- Improved synchronization and alignment of stereo audio signals
- Enhanced noise cancellation and audio quality
- More accurate audio equipment calibration
- Better understanding and analysis of stereo audio signals
Original Abstract Submitted
A stereo audio signal delay estimation method includes obtaining a current frame of a stereo audio signal. The current frame includes a first channel audio signal and a second channel audio signal. Estimating an inter-channel time (ITD) of the current frame using a first algorithm when a signal type of a noise signal included in the current frame is a coherent noise signal type, or estimating the ITD using a second algorithm when the signal type of the noise signal is a diffuse noise signal type. The first algorithm includes weighting a frequency domain cross power spectrum based on a first weighting function that includes a first construction factor. The second algorithm includes weighting the frequency domain cross power spectrum based on a second weighting function that includes a second construction factor different from the first construction factor.
