Question

Which sub-word tokenization algorithm builds its vocabulary by iteratively merging the most frequent adjacent character pairs to specifically address the out-of-vocabulary problem?

Accepted Answer

The sub-word tokenization algorithm described is Byte Pair Encoding, commonly referred to as BPE. This algorithm addresses the out-of-vocabulary problem, which occurs when a machine learning model encounters words during testing that it never saw during training, by breaking down unknown words into smaller, familiar components. BPE begins by treating every character as an individual unit. It then iteratively identifies the most frequent pair of adjacent tokens in the training data and merges them into a new, single token. For example, if the pair &#x27;e&#x27; and &#x27;s&#x27; appears most frequently, the algorithm merges them into the token &#x27;es&#x27;. This process repeats until the vocabulary reaches a pre-defined size. By representing words as sequences of these frequent sub-word units, the model can construct representations for rare or unseen words using parts it has already learned, effectively eliminating the issue of encountering unknown vocabulary.

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Which sub-word tokenization algorithm builds its vocabulary by iteratively merging the most frequent adjacent character pairs to specifically address the out-of-vocabulary problem?

The sub-word tokenization algorithm described is Byte Pair Encoding, commonly referred to as BPE. This algorithm addresses the out-of-vocabulary problem, which occurs when a machine learning model encounters words during testing that it never saw during training, by breaking down un....