Howtosignalprocessing
- What is overlap in signal processing?
- What is windowing in signal processing?
- Why do we need to overlap segments for analysis in speech signal processing?
- What is overlapping windows?
What is overlap in signal processing?
In signal processing, the overlap–add method is an efficient way to evaluate the discrete convolution of a very long signal with a finite impulse response (FIR) filter : (Eq.1)
What is windowing in signal processing?
The process of windowing a signal involves multiplying the time record by a smoothing window of finite length whose amplitude varies smoothly and gradually towards zero at the edges. The length, or time interval, of a smoothing window is defined in terms of number of samples.
Why do we need to overlap segments for analysis in speech signal processing?
To produce a spectrogram, software divides the sound signal into short, overlapping time segments called frames, each about 40 milliseconds long (1/25th of a second). The overlap avoids losing information at the start and end of each frame. The sound spectrum is determined for each frame.
What is overlapping windows?
If there is overlap between adjacent windows, this technique is known as overlapping sliding window, and if not, it is called the non-overlapping windows technique. Figure 3 illustrates the non-overlapping and overlapping windowing techniques.
