Dual Language Models for Code Switched Speech Recognition
Table 2: Perplexities on the dev/test sets using mixed LMs and DLMs with different smoothing techniques.
['Smoothing Technique', 'Dev mixed LM', 'Dev DLM', 'Test mixed LM', 'Test DLM']
The baseline LM is a smoothed bigram LM estimated using the code-switched text which will henceforth be referred to as mixed LM. Our DLM was built using two monolingual bigram LMs. DLMs clearly outperform mixed LMs on both the datasets. All subsequent experiments use Kneser-Ney smoothed bigram LMs as they perform better than the Good Turing smoothed bigram LMs.