mindspore.dataset.audio.DBToAmplitude
- class mindspore.dataset.audio.DBToAmplitude(ref, power)[source]
Turn a waveform from the decibel scale to the power/amplitude scale.
- Parameters
- Raises
- Supported Platforms:
CPU
Examples
>>> import numpy as np >>> import mindspore.dataset as ds >>> import mindspore.dataset.audio as audio >>> >>> # Use the transform in dataset pipeline mode >>> waveform = np.random.random([5, 16]) # 5 samples >>> numpy_slices_dataset = ds.NumpySlicesDataset(data=waveform, column_names=["audio"]) >>> transforms = [audio.DBToAmplitude(0.5, 0.5)] >>> numpy_slices_dataset = numpy_slices_dataset.map(operations=transforms, input_columns=["audio"]) >>> for item in numpy_slices_dataset.create_dict_iterator(num_epochs=1, output_numpy=True): ... print(item["audio"].shape, item["audio"].dtype) ... break (16,) float64 >>> >>> # Use the transform in eager mode >>> waveform = np.random.random([16]) # 1 sample >>> output = audio.DBToAmplitude(0.5, 0.5)(waveform) >>> print(output.shape, output.dtype) (16,) float64
- Tutorial Examples: