mindspore.dataset.audio.transforms.Contrast
- class mindspore.dataset.audio.transforms.Contrast(enhancement_amount=75.0)[source]
Apply contrast effect. Similar to SoX implementation. Comparable with compression, this effect modifies an audio signal to make it sound louder.
- Parameters
enhancement_amount (float, optional) – Controls the amount of the enhancement. Allowed range is [0, 100] (default=75.0). Note that enhancement_amount equal to 0 still gives a significant contrast enhancement.
Examples
>>> import numpy as np >>> >>> waveform = np.array([[2.716064453125e-03, 6.34765625e-03], [9.246826171875e-03, 1.0894775390625e-02]]) >>> numpy_slices_dataset = ds.NumpySlicesDataset(data=waveform, column_names=["audio"]) >>> transforms = [audio.Contrast()] >>> numpy_slices_dataset = numpy_slices_dataset.map(operations=transforms, input_columns=["audio"])