"...text-generation-inference.git" did not exist on "a4e3e8c608d1e75b85e849cce931be551bb859ad"
Unverified Commit 4b411030 authored by Manoj Plakal's avatar Manoj Plakal Committed by GitHub
Browse files

Add sanity checks to mel computation.

Clamp the requested frequency range to [0, Nyquist].
parent d9f6b6f3
...@@ -153,9 +153,15 @@ def spectrogram_to_mel_matrix(num_mel_bins=20, ...@@ -153,9 +153,15 @@ def spectrogram_to_mel_matrix(num_mel_bins=20,
ValueError: if frequency edges are incorrectly ordered. ValueError: if frequency edges are incorrectly ordered.
""" """
nyquist_hertz = audio_sample_rate / 2. nyquist_hertz = audio_sample_rate / 2.
if upper_edge_hertz > nyquist_hertz:
raise ValueError("upper_edge_hertz %.1f is greater than Nyquist %.1f" %
(upper_edge_hertz, nyquist_hertz))
if lower_edge_hertz >= upper_edge_hertz: if lower_edge_hertz >= upper_edge_hertz:
raise ValueError("lower_edge_hertz %.1f >= upper_edge_hertz %.1f" % raise ValueError("lower_edge_hertz %.1f >= upper_edge_hertz %.1f" %
(lower_edge_hertz, upper_edge_hertz)) (lower_edge_hertz, upper_edge_hertz))
if upper_edge_hertz > nyquist_hertz:
raise ValueError("upper_edge_hertz %.1f is greater than Nyquist %.1f" %
(upper_edge_hertz, nyquist_hertz))
spectrogram_bins_hertz = np.linspace(0.0, nyquist_hertz, num_spectrogram_bins) spectrogram_bins_hertz = np.linspace(0.0, nyquist_hertz, num_spectrogram_bins)
spectrogram_bins_mel = hertz_to_mel(spectrogram_bins_hertz) spectrogram_bins_mel = hertz_to_mel(spectrogram_bins_hertz)
# The i'th mel band (starting from i=1) has center frequency # The i'th mel band (starting from i=1) has center frequency
......
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