Recognition engines with complementary language models

A speech recognition and recognizer technology, applied in speech recognition, speech analysis, instruments, etc.

Inactive Publication Date: 2004-07-07
HUAWEI TECH CO LTD
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  • Recognition engines with complementary language models
  • Recognition engines with complementary language models
  • Recognition engines with complementary language models

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Embodiment Construction

[0022] Speech recognition systems, such as large vocabulary continuous speech recognition systems, typically use a collection of recognition models to recognize input patterns. For example, acoustic models and vocabularies can be used to recognize words, and language models can be used to improve basic recognition results. figure 1 A typical structure of a large vocabulary continuous speech recognition system 100 is shown [see L. Rabiner, B-H. Juang, "Fundamental of speech recognition", Prentice Hall 1993, pp. 434-454]. System 100 includes spectrum analysis subsystem 110 and cell matching subsystem 120 . The speech input signal (SIS) is analyzed spectrally and / or temporally in the spectral analysis subsystem 110 in order to compute characteristic vectors (observation vectors, OV). Typically, the speech signal is digitized (eg sampled at 6.67 kHz) and pre-processed eg by implementing pre-emphasis. For example, successive samples are aggregated (batched) into frames correspond...

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Abstract

A huge vocabulary speech recognition system for recognizing a sequence of spoken words, having an input means for receiving a time-sequential input pattern representative of the sequence of spoken words. The system further includes a plurality of large vocabulary speech recognizers each being associated with a respective, different large vocabulary recognition model. Each of the recognition models is targeted to a specific part of the huge vocabulary. The system comprises a controller operative to direct the input pattern to a plurality of the speech recognizers and to select a recognized word sequence from the word sequences recognized by the plurality of speech recognizers.

Description

technical field [0001] The present invention relates to a large vocabulary recognition system for recognizing spoken word sequences, the system comprising: an input device for receiving a time-series input pattern representing a spoken word sequence; A large vocabulary speech recognizer that recognizes input patterns as word sequences in . Background technique [0002] US5819220 discloses a system for recognizing speech in an Internet environment. The system specifically targets the use of speech to access information resources on the World Wide Web (WWW). From the perspective of the problems encountered in the traditional speech recognition field, it is very difficult to establish a speech recognition system as a Web interface. Since users can virtually access any document on any topic, the main problem is that the system needs to support a huge vocabulary. Without supporting huge vocabularies, it is difficult to build proper recognition models such as language models fo...

Claims

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Application Information

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IPC IPC(8): G10L15/18G10L15/26G10L15/32
CPCG10L15/32G10L15/18G10L2015/228G10L15/34G10L15/183
Inventor E·特伦S·贝斯林M·乌尔里希
Owner HUAWEI TECH CO LTD
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