lir.metrics package
- lir.metrics.cllr(llr_data: LLRData, weights: tuple[float, float] = (1, 1)) float[source]
Calculate a log likelihood ratio cost (C_llr) for a series of log likelihood ratios.
Nico Brümmer and Johan du Preez, Application-independent evaluation of speaker detection, In: Computer Speech and Language 20(2-3), 2006.
- Parameters:
llr_data (LLRData) – LLRs and their metadata, wrapped in an LLRData object.
weights (tuple[float, float], optional) – The relative weights of the classes.
- Returns:
CLLR, the log likelihood ratio cost.
- Return type:
float
- lir.metrics.cllr_cal(llr_data: LLRData, weights: tuple[float, float] = (1, 1)) float[source]
Calculate the difference between the C_llr before and after isotonic calibration.
- Parameters:
llr_data (LLRData) – LLRs and their metadata, wrapped in an LLRData object.
weights (tuple[float, float], optional) – The relative weights of the classes.
- Returns:
CLLR_cal, the difference after isotonic calibration.
- Return type:
float
- lir.metrics.cllr_min(llr_data: LLRData, weights: tuple[float, float] = (1, 1)) float[source]
Estimate the discriminative power from a collection of log likelihood ratios.
- Parameters:
llr_data (LLRData) – LLRs and their metadata, wrapped in an LLRData object.
weights (tuple[float, float], optional) – The relative weights of the classes.
- Returns:
CLLR_min, a measure of discrimination.
- Return type:
float
- lir.metrics.llr_lower_bound(llrs: LLRData) float | None[source]
Provide corresponding lower bound for provided LLR data.
When an LLRData object contains a lower bound, return it. If not, return None.
- Parameters:
llrs (LLRData) – LLRs and their metadata, wrapped in an LLRData object.
- Returns:
The LLR lower bound, or None.
- Return type:
float | None
- lir.metrics.llr_upper_bound(llrs: LLRData) float | None[source]
Provide corresponding upper bound for provided LLR data.
When an LLRData object contains an upper bound, return it. If not, return None.
- Parameters:
llrs (LLRData) – LLRs and their metadata, wrapped in an LLRData object.
- Returns:
The LLR upper bound, or None.
- Return type:
float | None