公开(公告)号：US4783803A

公开(公告)日：1988-11-08

申请号：US797249

申请日：1985-11-12

申请人： James K. Baker ,  Paul G. Bamberg ,  Mark F. Sidell ,  Robert S. Roth

发明人： James K. Baker ,  Paul G. Bamberg ,  Mark F. Sidell ,  Robert S. Roth

IPC分类号： G10L15/00 ,  G10L1/00

CPC分类号： G10L15/00

摘要： A system is disclosed for recognizing a pattern in a collection of data given a context of one or more other patterns previously identified. Preferably the system is a speech recognition system, the patterns are words and the collection of data is a sequence of acoustic frames. During the processing of each of a plurality of frames, for each word in an active vocabulary, the system updates a likelihood score representing a probability of a match between the word and the frame, combines a language model score based on one or more previously recognized words with that likelihood score, and prunes the word from the active vocabulary if the combined score is below a threshold. A rapid match is made between the frames and each word of an initial vocabulary to determine which words should originally be placed in the active vocabulary. Preferably the system enables an operator to confirm the system's best guess as to the spoken word merely by speaking another word, to indicate that an alternate guess by the system is correct by typing a key associated with that guess, and to indicate that neither the best guess nor the alternate guesses was correct by typing yet another key. The system includes other features, including ones for determining where among the frames to look for the start of speech, and a special hardware processor for computing likelihood scores.

摘要翻译： 公开了一种系统，用于在先前识别的一个或多个其他模式的上下文的情况下识别数据集合中的模式。 优选地，该系统是语音识别系统，该模式是单词，并且数据的收集是一系列声学帧。 在处理多个帧中的每一个帧期间，对于活跃词汇表中的每个单词，系统更新表示单词和框架之间的匹配概率的似然度分数，将基于一个或多个先前识别的语言模型得分组合起来 具有该可能性分数的单词，并且如果组合分数低于阈值，则从活动词汇表中修剪单词。 在帧和初始词汇的每个单词之间进行快速匹配，以确定最初应该在活动词汇表中放置哪些单词。 优选地，该系统使得操作者能够仅通过说另一个词来确认系统对于口语的最佳猜测，以通过键入与该猜测相关联的键来指示系统的替代猜测是正确的，并且指示最佳 通过键入另一个键来猜测也不会有其他猜测是正确的。 该系统包括其他特征，包括用于确定帧之间寻找语音开始的特征，以及用于计算可能性分数的特殊硬件处理器。