Abstract
The selection of the speech recognition modeling unit is the primary problem of acoustic modeling in speech recognition, and different acoustic modeling units will directly affect the overall performance of speech recognition. This paper designs the Tibetan character segmentation and labeling model and algorithm flow for the purpose of solving the problem of selecting the acoustic modeling unit in Tibetan speech recognition by studying and analyzing the deficiencies of the existing acoustic modeling units in Tibetan speech recognition. After experimental verification, the Tibetan character segmentation and labeling model and algorithm achieved good performance of character segmentation and labeling, and the accuracy of Tibetan character segmentation and labeling reached 99.98%, respectively.
Highlights
Automatic speech recognition technology is a key technology for human-computer interaction
The Tibetan character segmentation and labeling model in this article is mainly composed of preprocessing, segmentation and labeling modules
This paper proposes the algorithm flow of Tibetan character segmentation and labeling by designing the Tibetan character segmentation and labeling model
Summary
Automatic speech recognition technology is a key technology for human-computer interaction. In Tibetan speech recognition system, researchers have considered modeling units with different granularity, including words and syllables [4], vowels [5,6,7,8] and phonemes [9,10,11], respectively. If words or syllables are used as modeling units, the requirements of the corpus are too high and can lead to data sparsity. In order to solve the above problems, the paper proposes a method of using Tibetan character as the modeling unit, and presents the flow of its segmentation and labeling algorithm. Tibetan character is defined as all single characters and Tibetan stacked combination symbols including the base character, head letter, subjoined letter, and vowel. The Tibetan syllable བ ིགས in བ, ི, ག and ས are each one character, and the syllable is composed of four characters
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