Enum SpecShape 

pub enum SpecShape {
    Centroid,
    Spread,
    Skewness,
    Kurtosis,
    Slope,
    Decrease,
    Rolloff,
}

Spectral shape descriptor

The following descriptors are described in:

Geoffroy Peeters, A large set of audio features for sound description (similarity and classification) in the CUIDADO project, CUIDADO I.S.T. Project Report 2004 (pdf)

Variants

Centroid

Spectral centroid

The spectral centroid represents the barycenter of the spectrum.

Note: This function returns the result in bin. To get the spectral centroid in Hz, bintofreq() should be used.

Spread

Spectral spread

The spectral spread is the variance of the spectral distribution around its centroid.

See also Standard deviation on Wikipedia.

Skewness

Spectral skewness

Similarly, the skewness is computed from the third order moment of the spectrum. A negative skewness indicates more energy on the lower part of the spectrum. A positive skewness indicates more energy on the high frequency of the spectrum.

See also Skewness on Wikipedia.

Kurtosis

Spectral kurtosis

The kurtosis is a measure of the flatness of the spectrum, computed from the fourth order moment.

See also Kurtosis on Wikipedia.

Slope

Spectral slope

The spectral slope represents decreasing rate of the spectral amplitude, computed using a linear regression.

Decrease

Spectral decrease

The spectral decrease is another representation of the decreasing rate, based on perceptual criteria.

Rolloff

Spectral roll-off

This function returns the bin number below which 95% of the spectrum energy is found.

Trait Implementations

impl AsNativeStr for SpecShape

fn as_native_str(&self) -> &'static str

Implementations should return strings ended with ‘\0’ (for ex.: "energy\0")

fn as_native_cstr(&self) -> *const c_char

Get constant as null-terminated C-string

fn as_rust_str(&self) -> &'static str

Get constant as rust string slice

impl AsRef<str> for SpecShape

fn as_ref(&self) -> &str

Converts this type into a shared reference of the (usually inferred) input type.

impl Clone for SpecShape

fn clone(&self) -> SpecShape

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for SpecShape

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl Display for SpecShape

fn fmt(&self, f: &mut Formatter<'_>) -> FmtResult

Formats the value using the given formatter.

impl FromStr for SpecShape

type Err = Error

The associated error which can be returned from parsing.

fn from_str(src: &str) -> Result<Self>

Parses a string s to return a value of this type.

impl Hash for SpecShape

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for SpecShape

fn eq(&self, other: &SpecShape) -> bool

Tests for self and other values to be equal, and is used by ==.

fn ne(&self, other: &Rhs) -> bool

Tests for !=. The default implementation is almost always sufficient, and should not be overridden without very good reason.

impl Copy for SpecShape

impl Eq for SpecShape

impl SpecMethod for SpecShape

impl StructuralPartialEq for SpecShape