update lfilter docstring

pytorch · Sep 14, 2024 · 0aafca4 · 0aafca4
1 parent 3664e14
commit 0aafca4
Show file tree

Hide file tree

Showing 2 changed files with 10 additions and 0 deletions.
diff --git a/docs/source/refs.bib b/docs/source/refs.bib
@@ -633,3 +633,12 @@ @article{forgione2021dynonet
   year={2021},
   publisher={Wiley Online Library}
 }
+
+@inproceedings{ycy2024golf,
+    title     = {Differentiable Time-Varying Linear Prediction in the Context of End-to-End Analysis-by-Synthesis},
+    author    = {Chin-Yun Yu and György Fazekas},
+    year      = {2024},
+    booktitle = {Proc. Interspeech},
+    pages     = {1820--1824},
+    doi       = {10.21437/Interspeech.2024-1187},
+}
diff --git a/src/torchaudio/functional/filtering.py b/src/torchaudio/functional/filtering.py
@@ -1000,6 +1000,7 @@ def _lfilter_core(
 def lfilter(waveform: Tensor, a_coeffs: Tensor, b_coeffs: Tensor, clamp: bool = True, batching: bool = True) -> Tensor:
     r"""Perform an IIR filter by evaluating difference equation, using differentiable implementation
     developed independently by *Yu et al.* :cite:`ismir_YuF23` and *Forgione et al.* :cite:`forgione2021dynonet`.
+    The gradients of `a_coeffs` are computed based on a faster algorithm from :cite:`ycy2024golf`.
 
     .. devices:: CPU CUDA