# Faculty topics: interpolation and Stupid Backoff

Subject: Natural Language Processing

Exam: TEE

Reader: https://deep-learning-study-room.vercel.app/nlp/#tee/read/u3-smoothing-extensions

Canonical: https://deep-learning-study-room.vercel.app/read/nlp/tee/read-chapter/u3-smoothing-extensions/

Unit 3 PDF p147 names these methods. Neither supplied TEE paper asks their numerical calculation; the worked values below are authored examples.

1. [N-gram interpolation: weighted evidence from several histories](https://deep-learning-study-room.vercel.app/read/nlp/tee/read/u3-smoothing-extensions--interpolation/)
2. [Backoff and the important score-versus-probability distinction](https://deep-learning-study-room.vercel.app/read/nlp/tee/read/u3-smoothing-extensions--stupid-backoff/)