Table Of Contenthapibook
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hapibook
o t the H ' ! ' K
A p p l i c a t i o n
Programming
Interface
JuIian OdelI
DanKershaw
Dave Ollason
Valtcho Valtchev
Version 1.4
David Whitehouse
The HAPI Book (for HAPI Version 1.4)
©COPYRIGHT 1999 Entropic Ltd
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Contents
Next: Part I: Tutorial Overview Up: hapibook Previous: hapibook
Contents
Part I: Tutorial Overview
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1 An Introduction to HAPI
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1.1 General Principles of Recognition
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1.2 The Position and Role of HAPI
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2 An Overview of HAPI
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2.1 Basics
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2.2 Configuration
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2.3 Type definitions and memory allocation
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2.4 Error Reporting
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2.5 Strings and Names
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2.6 Speech Input/Output
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2.7 HAPI Objects
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2.8 Operation Modes
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2.9 HAPI Version history
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3 Using HAPI: An Example Application
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3.1 Getting started
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Acoustic Models
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Dictionary
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Network
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Configuration
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Compilation
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Running the tutorial
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3.2 Program Description
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3.3 Initialisation
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3.4 User interaction
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3.5 Recognition
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3.6 Results Processing
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3.7 Program Control
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4 Using HAPI: Improving the Dialer
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4.1 Expanded Input Syntax
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4.2 Modification of User Phone Book
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4.3 Alternative Hypotheses
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4.4 Running the extended dialer
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5 Using HAPI: Speaker Adaptation
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5.1 Introduction
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5.1.1 An introduction to adaptation
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5.1.2 Types of adaptation
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5.1.3 Adaptation in HAPI
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5.2 Application design
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5.2.1 Key Design
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5.2.2 Application code definitions
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5.2.3 Application overview
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5.2.4 The application in depth
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5.3 Running the adaptation tool
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5.3.1 Data collection
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Performing adaptation
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5.3.3 Testing the adapted models
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6 Interfacing to a source driver
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6.1 An Example Driver
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6.2 Implementation
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6.2.1 The Buffer
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6.2.2 The HAPI Interface
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6.2.3 Data Capture
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6.3 Variations
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Part II: HAPI in Depth
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7 Developing HAPI Applications
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7.1 System Design
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7.2 HAPI for HTK users
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8 HAPI, Objects and Configuration
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8.1 Initialisation and status checks
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8.2 Configuration in general
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9 hapiHMMSetObject
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9.1 Definition
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9.2 Usage
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10 hapiTransformObject
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10.1 Transforms and adaptation
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10.2 Introduction to the transform object
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10.2.1 Application initialisation
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10.2.2 Transform types
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10.3 Transform object without further adaptation
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10.4 Adaptation
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10.4.1 A class-based example
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10.4.2 Using a full transform
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11 hapiSource/CoderObject
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11.1 hapiSourceObject
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11.2 hapiCoderObject
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11.3 Speech detector
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11.4 Cepstral Mean Normalisation
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11.5 Channels and Sessions
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11.6 Usage
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11.7 Utterance processing
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11.8 Access
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11.9 Application defined sources
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11.9.1 Troubleshooting
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12 hapiDictObject
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12.1 Types
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12.2 Definition
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12.3 Usage
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12.4 Access Functions
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12.5 Modification Functions
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13 hapiLatObject
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13.1 Definition
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13.2 Usage
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13.3 Access
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13.3.1 Nodes
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13.3.2 Arcs
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13.3.3 Phone alignment
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13.4 Routes
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13.5 Sub lattices
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13.6 Modification
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13.7 NBest
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14 hapiNetObject
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14.1 Definition
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14.2 Usage
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15 hapiRecObject
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15.1 Types of Recogniser
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15.2 Usage
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15.3 Frame by frame operation
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15.4 Callback operation
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Contents
16 hapiResObject
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16.1 Usage
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16.2 Word level results access
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16.3 Phone level results access
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Part III: Application Issues
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17 System Design
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17.1 Hands-free operation with HAPI
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17.2 Managing dialogs
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17.3 Robustness
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17.3.1 Out of grammar rejection
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17.3.2 Barge-in
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17.3.3 Simplicity
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17.4 The dialer
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17.4.1 Playback of audio prompts
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17.4.2 Verification of results
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17.4.3 Phone book addition
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17.4.4 Fallback simplification in adverse conditions
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18 Extended Results Processing
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18.1 Voice controlled Email
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18.2 Command Syntax
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18.3 Command Processing
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18.4 Ambiguity
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18.5 Implementation
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18.6 An Example Command
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Part IV: Decoders
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19 Decoder Variations
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19.1 The HTK decoder
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19.2 The MVX decoder
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19.3 The LVX decoder
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19.4 Decoder development
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20 The Core HTK Decoder
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20.1 Systems
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20.1.1 HMMs
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20.1.2 Dictionaries
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20.1.3 Networks
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20.2 Decoder
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20.2.1 Features
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20.2.2 Pruning
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20.2.3 Considerations
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21 The LVX Decoder
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21.1 Systems
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21.1.1 HMMs
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21.1.2 Dictionaries
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21.1.3 Networks
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21.2 Decoder
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21.2.1 Features
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21.2.2 Pruning
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21.2.3 Considerations
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Part V: Appendices
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A HAPI Reference
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A.1 Data Types
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A.2 Configuration Variables
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A.3 Objects
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A.4 hapiSourceObject
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A.5 hapiSourceObject Drivers
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A.6 hapiCoderObject
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A.7 hapiHMMSetObject
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A.8 hapiTransformObject
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A.9 hapiDictObject
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A.10 hapiLatObject
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A.11 hapiNetObject
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A.12 hapiResObject
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A.13 hapiRecObject
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Frame-by-frame operation
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Callback operation
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B HAPI from J (J )
m AVA HAPI
B.1 J data types and classes
n HAPI
B.2 Auxiliary J classes and interfaces
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Abstract instance methods
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Notes
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Abstract instance methods
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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Class constants
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Notes
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B.3 Core J classes
n HAPI
B.3.1 JHAPI.hapi
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Class methods
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Notes
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B.3.2 JHAPI.SourceObject
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Class constants
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Constructors
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Class methods
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Instance methods
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Notes
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B.3.3 JHAPI.CoderObject
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Class constants
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Constructors
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Class methods
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Instance methods
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B.3.4 JHAPI.HMMSetObject
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Constructors
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Class methods
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Instance methods
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Notes
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B.3.5 JHAPI.TransformObject
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Constructors
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Contents
Class methods
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Instance methods
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B.3.6 JHAPI.DictObject
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Class constants
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Constructors
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Class methods
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Instance methods
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B.3.7 JHAPI.NetObject
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Constructors
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Class methods
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Instance methods
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B.3.8 JHAPI.LatObject
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Instance variables
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Constructors
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Class methods
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Instance methods
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B.3.9 JHAPI.ResObject
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Constructors
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Class methods
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Instance methods
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B.3.10 JHAPI.RecObject
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Constructors
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Class methods
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Instance methods
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B.4 Creating a speech application in J
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B.4.1 General information
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B.4.2 Program Description
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B.4.3 Error handling
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B.4.4 Basic recognition component
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B.4.5 Dialer recognition component
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B.4.6 Main program
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C Error and Warning Codes
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C.1 Generic Errors
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C.2 Summary of Errors by Module
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Index
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About this document ...
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Contents
Next: Part I: Tutorial Overview Up: hapibook Previous: hapibook
Entropic HAPI_V1.4 email [email protected]
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