SELFSIM replaces less prominent spectral windows with the more prominent windows which are most similar to them in the spectral envelope, scaling for any overall level difference between the two. PARAMETER similar The no. of windows to replace with similar ones, e.g. 2: loudest replaces 2 most similar, next loudest replaces next 2 etc. Range: 1 to no. of windows-1. SIMILAR uses the following replacement rule: a value of 1 uses the loudest window to replace the most similar window, then the next loudest window to replace the window most similar and so on, with appropriate overall-loudness scaling. With value 2, the loudest windows replaces the TWO most similar windows: if window A replaces B, and C is most similar to B, then A also replaces C, etc. SELFSIM tends to give a "crackly" break-up of the sound (esp if process repeated). The process can run quite slowly.
|