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| | | class DefaultFrontend(AbsFrontend): |
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| | | """Conventional frontend structure for ASR. |
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| | | |
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| | | Stft -> WPE -> MVDR-Beamformer -> Power-spec -> Mel-Fbank -> CMVN |
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| | | """ |
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| | | class MultiChannelFrontend(AbsFrontend): |
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| | | """Conventional frontend structure for ASR. |
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| | | |
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| | | Stft -> WPE -> MVDR-Beamformer -> Power-spec -> Mel-Fbank -> CMVN |
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| | | """ |
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| | | |
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| | |
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| | | # Change torch.Tensor to ComplexTensor |
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| | | # input_stft: (..., F, 2) -> (..., F) |
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| | | input_stft = ComplexTensor(input_stft[..., 0], input_stft[..., 1]) |
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| | | return input_stft, feats_lens |
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| | | return input_stft, feats_lens |
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