what should be the constraint on window length in function melspectrogram?

7 次查看（过去 30 天）
krishna Chauhan
krishna Chauhan 2022-1-12
评论： krishna Chauhan 2022-1-15
hi there
I am using the in built function melspectrogram in a loop, for calculation of spectrograms of a wav dataset.
The code I am using is given below:
fs = 44100;
frameDuration = 0.046;
hopDuration = 0.023;
numBands = 128;
frameLength = round(frameDuration*fs);
hopLength = round(hopDuration*fs);
spec = melSpectrogram(x,fs, ...
'WindowLength',frameLength, ...
'OverlapLength',frameLength - hopLength, ...
'FFTLength',2048, ...
'NumBands',numBands, ...
'FrequencyRange',[50,8000]);
getting the error below:
Error using audio.internal.MelSpectrogramValidator/validateOptionalInputs (line 97)
Invalid window length. WINDOWLENGTH must be in the range [2,size(x,1)], where x is the audio input.
The default window length depends on the specified sample rate: round(fs*0.03).
the audio data length is 160000. Can someone guide me whats wrong here? This is working fine on other dataset, with sampling rate=16000.
Thanks

请先登录，再回答此问题。

采纳的回答

jibrahim
jibrahim 2022-1-12
Hi Krishna,
This looks fine. Make sure that your input x is a column vector, not a row vector. The function treats each column as a separate channel, so I would expect to see this error if x is a long row vector,
  3 个评论
显示 1更早的评论
jibrahim
jibrahim 2022-1-13
OK... Could you update your reproduction steps to include x? You can either instantiate a vector of the same dimensions, or attach x in a MAT file.
krishna Chauhan
krishna Chauhan 2022-1-15
Yes sir you are right. In first case read(ads) thowring x as 60000X1 double, while in scond the size is 1X6000 double I just checked.Now I can make x as x', but my proble is why read(ads) is reading wav files in different way.
Thanks

请先登录，再进行评论。

更多回答（0 个）

类别

在 Help Center 和 File Exchange 中查找有关 Feature Extraction 的更多信息

标签

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by