Programmer Guide/Command Reference/EVAL/hz2mel: Difference between revisions
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{{DISPLAYTITLE:hz2mel, mel2hz}} | {{DISPLAYTITLE:hz2mel, mel2hz}} | ||
Convert all elements of ''x'' from Hertz to Mel and vice versa. | Convert all elements of ''x'' from Hertz to Mel and vice versa. | ||
;Usage: | ;Usage: <code>hz2mel(<var>x</var>)</code> | ||
: | :<code>mel2hz(<var>x</var>)</code> | ||
:;<var>x</var>: a scalar, vector or matrix | :;<var>x</var>: a scalar, vector or matrix | ||
;Result: The result ''r'' has the same type as ''x'' and contains the converted elements of ''x''. | ;Result: The result ''r'' has the same type as ''x'' and contains the converted elements of ''x''. | ||
:;'''hz2mel''': ''r''<sub>i,j</sub> = 2595 * log | :;'''hz2mel''': ''r''<sub>i,j</sub> = 2595 * log<sub>10</sub>(1 + ''x''<sub>i,j</sub> / 700) | ||
::''x''<sub>i,j</sub> is the frequency in Hz and must be greater than 0 | ::''x''<sub>i,j</sub> is the frequency in Hz and must be greater than 0 | ||
:;'''mel2hz''': ''r''<sub>i,j</sub> = 700 * (10 ^ (''x''<sub>i,j</sub> / 2595) - 1 | :;'''mel2hz''': ''r''<sub>i,j</sub> = 700 * (10 ^ (''x''<sub>i,j</sub> / 2595) - 1) | ||
::''x''<sub>i,j</sub> is the frequency in Mel and must be greater than 0 | ::''x''<sub>i,j</sub> is the frequency in Mel and must be greater than 0 | ||
;See also: [[ | ;See also: [[../hz2bark|hz2bark, bark2hz]], [[../hz2erb|hz2erb, erb2hz]], [[../hz2cent|hz2cent, cent2hz]], [[../hth|hth]], [[../log2lin|lin2log, log2lin]] | ||
[[ | [[../#Functions|<function list>]] | ||
Latest revision as of 10:55, 21 April 2011
Convert all elements of x from Hertz to Mel and vice versa.
- Usage
hz2mel(x)mel2hz(x)- x
- a scalar, vector or matrix
- Result
- The result r has the same type as x and contains the converted elements of x.
- hz2mel
- ri,j = 2595 * log10(1 + xi,j / 700)
- xi,j is the frequency in Hz and must be greater than 0
- mel2hz
- ri,j = 700 * (10 ^ (xi,j / 2595) - 1)
- xi,j is the frequency in Mel and must be greater than 0
- See also
- hz2bark, bark2hz, hz2erb, erb2hz, hz2cent, cent2hz, hth, lin2log, log2lin
