zero crossing in sound signal
显示 更早的评论
is there a bulit in function for zero crossing in sound signal and if there isn't can you teach me one
回答（1 个）
Gita
2012-10-21
0 个投票
Write your code using diff and sign functions
3 个评论
Walter Roberson
2012-10-21
That algorithm does not appear to account for noise or measurement error
Gita
2012-10-22
Filtering might be helpful
Walter Roberson
2012-10-22
Consider the case of successive approximations to a square wave by adding more frequencies. The "top" of the square wave starts sinusoidal with low frequencies, and the relative period and amplitude of the sinusoids gets lower and lower, with the top more and more closely approximating a straight line to the level of our visual acuity. But at any stage before the infinite, examine with sufficient resolution and you will still see many increases and decreases on a local level along the top. None of those increases or decreases has anything to do with zero crossing of the signal.
Thus, purely local algorithms (including local smoothers) cannot be used to detect zero crossings with any reliability.
类别
在 帮助中心 和 File Exchange 中查找有关 Audio I/O and Waveform Generation 的更多信息
2012-10-21
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
