Chapter
Characteristics of the Book
New idea of speech secure communication
Newly proposed speech information hiding technology
Potential Readers of the Book
1.1.1 - Progress in Secure Communication
1.1.2 - A New Technique for Secure Communication: Information Hiding
1.1.2.1 - Basic Concepts of Information Hiding
1.1.2.2 - Basic Principles and Classifications
Data Hiding and Data Embedding
Fingerprinting and Labeling
Copyright Protection for Digital Media
1.1.2.3 - Applications of Information Hiding
1.1.2.4 - Characteristics of Information Hiding
1.2 - Introduction to Speech Coding
1.2.1 - Basic Principles of Speech Coding
1.2.1.1 - Redundancy of Speech Signals
1.2.1.2 - Two Types of Coding Methods
1.2.2 - Speech Coding Standards
1.2.2.1 - Subjective Evaluation Method
1.2.2.2 - Objective Evaluation Method
1.4 - Analysis of Available Information Hiding Methods
1.4.1 - Least Significant Bit
1.4.2 - Phase Hiding Method
1.4.3 - Echo Hiding Method
1.4.4 - Hiding Method Based on Statistics
1.4.5 - Transform Domain Method
1.5 - Organization of This Book
Chapter 2 - The Information Hiding Model for Speech Secure Communication
2.1 - Introduction and Motivation
2.2 - Model of Information Hiding as a Communication Problem
2.3 - Speech Information Hiding Model
2.3.3.1 - Uniform correlation coefficient ρ
2.3.3.2 - Segment average SNR
2.3.3.3 - Speech energy variation d
2.3.3.4 - Segment average Itakura distance DM
2.4 - Experiments and Results Analysis
Chapter 3 - The ABS Speech Information Hiding Algorithm Based on Filter Similarity
3.1 - Introduction and Motivation
3.1.1 - Brief Introduction to the ABS Scheme
3.1.1.1 - Basic Principles of LPC
3.1.1.2 - ABS Coding Based on LPC
3.1.2 - Analysis of the ABS Scheme
3.1.2.1 - Frame Similarity
3.1.2.2 - Vector Codebooks
3.3 - LPC Coefficient Substitution Based on Filter Similarity
3.3.1 - LPC Substitution Algorithm
3.4 - Secret Speech Information Hiding and Extraction Algorithm
3.4.1 - Speech Information Hiding Algorithm
3.4.2 - Speech Information Extraction Algorithm
3.5 - Experimental Results and Analysis
3.5.1 - Selection of Test Parameters
3.5.2 - Experimental Results
3.5.3 - Calculation Complexity
Chapter 4 - The G.721-Based Speech Information Hiding Approach
4.1 - Introduction to the G.721 Coding Standard
4.1.1 - Differential Pulse Code Modulation
4.1.2.1 - Forward Gain-Adaptive Quantizer
4.1.2.2 - Backward Gain-Adaptive Quantizer
4.1.2.3 - Adaptive Differential Pulse Code Modulation
4.2 - The Approach to Hide Secret Speech in G.721
4.2.1 - Embedding Algorithm
4.2.2 - Extraction Algorithm
4.3 - Experimental Results and Analysis
Chapter 5 - The G.728-Based Speech Information Hiding Approach
5.1 - Code Excited Linear Prediction
5.1.1 - The CELP Speech Production Model
5.1.2 - Coding Principles
5.1.3 - Encoder Operation
5.1.4 - Perceptual Weighting
5.1.5 - Vector Quantization
5.2 - Introduction to the G.728 Coding Standard
5.3 - The CELP-Based Scheme of Speech Information Hiding and Extraction
5.3.2 - Extraction Scheme
5.4 - Approach to Hide Secret Speech in G.728
5.4.1 - Embedding Algorithm
5.4.2 - Extraction Algorithm
5.5 - Experimental Results and Analysis
Chapter 6 - The G.729-Based Speech Information Hiding Approach
6.1 - Introduction to the G.729 Coding Standard
6.1.1 - Algebraic Codebook Structure
6.1.2 - Adaptive Codebook
6.1.2.1 - Perceptual Weighting Filter
6.1.2.2 - Open-Loop Pitch Period Estimation
6.1.2.3 - Search Range for Pitch Period
6.1.2.4 - Finding Integer Lag
6.1.2.5 - Finding Fractional Lag
6.1.3 - G.729 Coding Scheme
6.1.3.1 - Encoding Operations
6.1.3.2 - Decoding Operation
6.2 - The ACELP-Based Scheme of Speech Information Hiding and Extraction
6.2.2 - Extraction Scheme
6.3 - Approach to Hide Secret Speech in G.729
6.3.1 - Embedding Algorithm
6.3.2 - Extraction Algorithm
6.4 - EXPERIMENTAL Results and Analysis
Chapter 7 - The GSM (RPE-LTP)-Based Speech Information Hiding Approach
7.1 - Introduction to the GSM (RPE-LTP) Coding Standard
7.1.1 - RPE-LTP Coding Scheme
7.1.1.1 - Multipulse Excitation Model
7.1.1.2 - Characteristics of GSM (RPE-LTP) Coding Scheme
7.1.2 - GSM Coding Scheme
7.1.2.3 - LPC Quantization and Interpolation
7.1.2.4 - Prediction-Error Filter
7.1.2.5 - Long-Term LP Analysis, Filtering, and Coding
7.1.2.6 - Weighting Filter
7.1.2.7 - Position Selection
7.1.2.9 - Excitation Generator
7.2 - Approach to Hide Secret Speech in GSM (RPE-LTP)
7.2.1 - Embedding Algorithm
7.2.2 - Extraction Algorithm
7.3 - Experimental Results and Analysis
Chapter 8 - Covert Communication Based on the VoIP System
8.1 - Introduction to the VoIP-Based Covert Communication System
8.1.1 - Introduction to the VoIP System
8.1.2 - An Outline for VoIP Steganography
8.1.3 - Classifications of the Embedding Method
8.2 - Modeling and Realization of VoIP-Based Covert Communication
8.3 - Embedding Secret Speech into VoIP G.729 Speech Flows
8.3.1 - The CNT of G.729 Parameters
8.3.2 - Embedding Approach Based on Matrix Coding
8.3.3 - Embedding Procedure
8.3.3.1 - Embedding process
8.3.3.2 - Extraction process
8.3.4 - EXPERIMENTAL Results and Analysis
8.3.4.1 - Objective Quality
8.3.4.2 - Subjective Quality
Chapter 9 - Design of Real-Time Speech Secure Communication over PSTN
9.1 - Secure Communication Plan
9.1.2 - Requirements Analysis
9.2 - Design and Realization of a Secure Communication System Based on PC
9.2.1 - Framework for Design
9.2.2 - Coding Scheme Selection
9.2.3 - Multimedia Programming
9.2.3.1 - Implementation Levels
9.2.4 - System Realization
9.2.4.1 - RCC Communication Module
9.2.4.2 - Speech Collecting/Playing Module
9.2.4.3 - Speech encoding/decoding module
9.2.4.4 - Data Embedding/Extraction Module
9.2.4.5 - Data Encryption/Decryption Module
9.3 - Speech Information Hiding Telephony (SIHT) Based on PSTN
9.3.2 - Description of the SIHT
9.3.2.1 - Robustness of Information Hiding
9.3.2.3 - Secure Encryption
9.3.3 - Speech Information Hiding Scheme
9.3.4.1 - Speech Coder and Speech Decoder
9.3.4.2 - Encryption and Decryption
9.3.4.4 - Hider and Extractor
9.3.5 - SIHT Operating Modes
9.3.6 - Architecture of SIHT
9.3.6.1 - Computational Load Distribution
9.3.6.2 - Architecture Details