- nvidia.dali.fn.to_decibels(*inputs, **kwargs)¶
Converts a magnitude (real, positive) to the decibel scale.
Conversion is done according to the following formula:
min_ratio = pow(10, cutoff_db / multiplier) out[i] = multiplier * log10( max(min_ratio, input[i] / reference) )
- Supported backends
input (TensorList) – Input to the operator.
- Keyword Arguments:
bytes_per_sample_hint (int or list of int, optional, default = ) –
Output size hint, in bytes per sample.
If specified, the operator’s outputs residing in GPU or page-locked host memory will be preallocated to accommodate a batch of samples of this size.
cutoff_db (float, optional, default = -200.0) –
Minimum or cut-off ratio in dB.
Any value below this value will saturate. For example, a value of
cutoff_db=-80corresponds to a minimum ratio of
multiplier (float, optional, default = 10.0) – Factor by which the logarithm is multiplied. The value is typically 10.0 or 20.0, which depends on whether the magnitude is squared.
preserve (bool, optional, default = False) – Prevents the operator from being removed from the graph even if its outputs are not used.
reference (float, optional, default = 0.0) –
If a value is not provided, the maximum value for the input will be used as reference.
The maximum of the input will be calculated on a per-sample basis.
seed (int, optional, default = -1) –
If not provided, it will be populated based on the global seed of the pipeline.