Difference between multi-level and multi-scale decomposition in discrete wavelet transform

I am working on a example to learn about wavelets and their applications for 1-D signals. For a simple project to denoise an ECG signal, one of the papers proposed a method which said to perform multi-level and multi-scale decomposition of the noisy ECG signal. I learned that detcoef function is used to obtain the detail co-efficients of the layers wavedec function performs multi-level wavelet analysis. Is this same as multi-scale decomposition? If no,what does it actually mean?

PS - I do know that now there exists a wavelet denoiser in matlab which does all of this work automatically but I want to do this manually to learn more about this.

[Ewunate Assaye Kassaw]

Good question & also mine

did you get an answer is so can u help me?