# Pruned CTC for Memory-Efficient Large-Vocabulary ASR Training

> Source: <https://aiflash.com/news/128586/>
> Published: 2026-09-29 15:01:10+00:00

Connectionist temporal classification (CTC) naturally supports offline and streaming speech recognition with utterance-level supervision, but conventional implementations materialize frame-by-vocabulary activations in memory, making CTC training with native LLM vocabularies prohibitively memory-inte