剑桥大学编写的语音识别的软件ATK（HTK的C++接口）资源-CSDN文库

语音识别

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ATK

An Application Toolkit for HTK

Version 1.6

Steve Young

Email: sjy@eng.cam.ac.uk

Date: 1

June 2007

Machine Intelligence Laboratory

Cambridge University Engineering Dept

Trumpington Street, Cambridge, CB2 1PZ

Contents

1 Overview .......................................................................................................................................... 5

1.1 The ATK Library ...................................................................................................................... 5

1.2 Example ATK Configurations .................................................................................................. 6

1.3 Building an Application ............................................................................................................ 8

2 Packets ............................................................................................................................................ 13

2.1 Generic Packet Properties ....................................................................................................... 13

2.1.1 Programming .................................................................................................................. 13

2.2 Empty Packets ........................................................................................................................ 14

2.2.1 Programming .................................................................................................................. 14

2.3 String Packets ......................................................................................................................... 14

2.3.1 Programming .................................................................................................................. 14

2.4 Command Packets .................................................................................................................. 15

2.4.1 Programming .................................................................................................................. 15

2.5 WaveData Packets .................................................................................................................. 15

2.5.1 Programming .................................................................................................................. 16

2.6 Observation Packets ............................................................................................................... 16

2.6.1 Programming .................................................................................................................. 16

2.7 Phrase Packets ........................................................................................................................ 16

2.7.1 Programming .................................................................................................................. 18

3 Buffers ............................................................................................................................................ 19

3.1 Programming .......................................................................................................................... 19

4 Components .................................................................................................................................... 21

4.1 Programming .......................................................................................................................... 21

5 The Monitor .................................................................................................................................... 25

5.1 Programming .......................................................................................................................... 27

5.2 Configuration Variables ......................................................................................................... 27

6 System Components ....................................................................................................................... 28

6.1 Audio Input (ASource) ........................................................................................................... 28

6.1.1 Configuration Variables.................................................................................................. 29

6.1.2 Run-Time Commands ..................................................................................................... 30

6.1.3 Programming .................................................................................................................. 31

6.2 Coder (ACode) ....................................................................................................................... 32

6.2.1 Configuration Variables.................................................................................................. 33

6.2.2 Run-Time Commands ..................................................................................................... 34

6.2.3 Programming .................................................................................................................. 35

6.3 Recogniser (ARec) ................................................................................................................. 36

6.3.1 Configuration Variables.................................................................................................. 39

6.3.2 Confidence Scoring ........................................................................................................ 40

6.3.3 N-Gram Language Models ............................................................................................. 41

6.3.4 Run-Time Commands ..................................................................................................... 41

6.3.5 Programming .................................................................................................................. 41

6.4 Synthesis (ASyn) .................................................................................................................... 42

6.4.1 Configuration Variables.................................................................................................. 42

6.4.2 Run-Time Commands ..................................................................................................... 42

6.4.3 Programming .................................................................................................................. 43

7 Resources (ARMan) ....................................................................................................................... 44

7.1 Resources and Resource Groups ............................................................................................ 44

7.1.1 Configuration Variables.................................................................................................. 45

7.1.2 Programming .................................................................................................................. 45

7.2 Dictionary (ADict) .................................................................................................................. 46

7.2.1 Configuration Variables.................................................................................................. 46

7.2.2 Programming .................................................................................................................. 46

7.3 Grammar (AGram) ................................................................................................................. 47

7.3.1 Configuration Variables.................................................................................................. 47

7.3.2 Programming .................................................................................................................. 48

7.4 N-Gram Language Model (ANGram) .................................................................................... 49

7.4.1 Configuration Variables.................................................................................................. 49

7.4.2 Programming .................................................................................................................. 50

7.5 HMMSet (AHmms) ................................................................................................................ 50

7.5.1 Configuration Variables.................................................................................................. 50

7.5.2 Programming .................................................................................................................. 50

8 The AIO Asynchronous Input/Output Control Component ............................................................ 52

8.1 Configuration Variables ......................................................................................................... 53

8.2 Run-Time Commands ............................................................................................................. 54

8.3 Programming .......................................................................................................................... 54

9 Using ATK ..................................................................................................................................... 56

9.1 Initialisation and Error Reporting ........................................................................................... 56

9.2 No-Console Mode................................................................................................................... 56

9.3 Resource Incompatibility Issues ............................................................................................. 57

9.4 ATKLib and Test Programs.................................................................................................... 57

9.5 Using ATK with Windows MFC ............................................................................................ 58

9.6 Tuning an ATK Recogniser .................................................................................................... 60

10 ATK Application Examples ....................................................................................................... 61

10.1 AVite - an ATK-based version of HVite ................................................................................ 61

10.2 Simple Spoken Dialogue System (SSDS) .............................................................................. 62

10.3 Asynchronous Spoken Dialogue System (ASDS) .................................................................. 65

Index ....................................................................................................................................................... 66

1 Overview

ATK is an API designed to facilitate building experimental applications for HTK. It consists of a C++

layer sitting on top of the standard HTK libraries. This allows novel recognisers built using customised

versions of HTK to be compiled with ATK and then tested in working systems.

Like HTK itself, it is

supported on both Linux and Windows (both as a terminal application and an MFC application

ATK is multi-threaded. It allows a variety of components to be connected together to implement

different architectures and applications. Efficiency is a relatively low priority but the pipeline structure

is designed to reduce latency to a minimum to enable highly responsive systems to be built.

In addition to recognition using HTK models, ATK supports basic speech synthesis in English by

embedding the CMU Flite package.

ATK is a flexible programming environment for building spoken dialog systems and related

applications. The use of ATK requires a reasonable level of competence in C++, experience in

building applications on Linux or Windows, and a basic understanding of speech recognition

technology.

ATK is not designed for newcomers to speech recognition or for novice programmers.

1.1 The ATK Library

The module structure of the ATK Library is shown by the dependency diagram in Figure 1. The

library modules AHTK, AGram, ANGram, ADict, and AHmms provide wrappers around the basic

HTK resources: grammars, n-grams, dictionaries and acoustic models. The modules ARMan and

AResource provide a manager for these resources.

The modules APacket, ABuffer, ATee and AComponent provide the basic types for creating

components and plumbing them together:

 Packet: is a chunk of information. Packets are used for transmitting a variety information between

asynchronously executing components. In particular packets are used to convey various forms of

user input and output signals (speech, event markers such as mouse clicks, etc). In these cases,

each packet has a time stamp to define the temporal span to which it relates. The types of data that

a packet can carry include text strings, waveform fragments, coded feature vectors, word labels

and semantic tags.

 Buffer: is a fifo packet queue. Buffers provide the channel for passing packets from one

component to another. Buffers can be of fixed size or unlimited size. Components wishing to

access a buffer can test to see whether the buffer operation would block before committing to the

operation.

 Component: is a processing element. Each component is executed within its own individual

thread. Components communicate by passing packets via buffers. In addition, components have a

command interface which can be used to update control parameters during operation and thereby

modify the runtime behaviour of the component.

ATK uses its own version of the standard HTK libraries. These have been extended to support the

extra functionality needed by ATK. In addition, a new HTK module called HThreads provides basic

platform independent thread support. The ATK HTK libraries cannot be used to compile HTKTools,

however, every attempt is made to keep them consistent with the latest HTK release (currently V3.4).

MFC support is currently rudimentary and largely untested.

See http://www.speech.cs.cmu.edu/flite

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youyouhao

2015-01-28

真在找这方面的资料，没想到还有这么好的资源，谢谢分享了！
wpj112

2012-09-26

这个资料是ATK的官方文档，在htk的官方网站也能找得到。还好吧。
如梦如幻2013

2016-02-28

东西挺好的，值得看。
朧明

2013-06-07

很好的资料！谢谢分享~
seasermy

2012-01-07

ATK是对HTK进行的二次封装，可以用来实验或者二次产品开发，底层重构了HTK TOOLS，建议还是先了解清楚hmm模型及HTK相关工具的使用及建模过程，ATK对于架构层次比较重视