githubharald/CTCWordBeamSearch
Connectionist Temporal Classification (CTC) decoder with dictionary and language model.
Implements beam search decoding constrained by a dictionary and optional word-level n-gram language model with add-k smoothing, enabling recognition of both dictionary words and arbitrary non-word characters (numbers, punctuation). Accepts raw RNN output (T×B×C+1 tensors) and supports four scoring modes trading accuracy for speed, from dictionary-only O(1) lookups to full n-gram forecasting. Distributed as a Python package with a C++ backend and integrates directly with neural network frameworks via numpy arrays.
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C++
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MIT
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Last pushed
Jan 31, 2026
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