The authors built a dual-alphabet byte-level tokenizer with deterministic routing for each Unicode character.
Routing Unicode characters between encodings narrows multilingual token-budget gaps
A reversible tokenizer routes characters through UTF-8 or UTF-16 according to byte length, reducing fragmentation for many non-Latin scripts without penalizing efficient English spans.
Big Tech
Hyunsik Kim · Youngmoon Jung
Samsung Research
Research Digest··2 min read
Kim and Jung propose Universal Byte-Level Encoding (UBE), a tokenizer substrate designed to reduce script-dependent token costs in multilingual language models.
Why this paper
From Samsung Research
In one line
UBE routing reduces token-budget disparity across scripts by converting 3-4 byte UTF-8 characters to UTF-16, matching BBPE quality.
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