Home Technology Cable digital TV network

Cable digital TV network



Introduction

The book is divided into 13 chapters, which comprehensively and systematically introduce the front-end system, transmission system, and the entire digital TV information transmission link of the cable digital TV network to the receiving terminal. The basic concepts, basic principles, and basic design methods, combined with the current development status of cable digital TV networks, pay attention to the explanation of the related knowledge of analog transmission systems and digital transmission systems, make this book meet the current teaching needs and the needs of future technological development.

The characteristics of this book are accurate concepts, rigorous exposition, novel content, excellent illustrations and texts, highlighting basic principles and explanations of basic concepts, scattered difficulties, gradual progress, easy self-study, and strong practicability.

The main readers of this book are senior undergraduate students and graduate students in various majors of information in universities and colleges, as well as teachers and researchers engaged in the research or teaching of cable digital TV network technology, and digital TV broadcasting network operation departments. Technical management and engineering design personnel.

Book Catalog

Chapter 1 Introduction 1

1.1 The history of the development of cable television networks 1

1.1.1  The development of cable television networks Feature 2

1.1.2 The development trend and prospect of cable TV network 2

1.2 Basic composition of cable TV system 4

1.2.1 Signal source 5< /p>

1.2.2 Front-end system 5

1.2.3  Trunk transmission system 5

1.2.4 User distribution network 6

1.2.5 Home network 6

Chapter 2 Cable digital TV network master plan 8

2.1 Overview of master plan 8

2.1.1 Preliminary preparation 9

2.1.2 Network master planning principles and content10

2.2 Frequency division and channel configuration10

2.2.1 Two-way cable television system frequency division10

< p>2.2.2 Cable digital TV channel configuration 11

2.3 Related basic knowledge16

2.3.1 dB ratio and level 16

2.3.2 Voltage Superposition 18

Chapter 3 Performance Analysis and Parameters of CATV System 21

3.1 System Noise 21

3.1.1  System Noise Generation and Classification 21

3.1.2 Thermal noise 22

3.1.3 Noise figure 23

3.1.4  S/N ratio and carrier-to-noise ratio 25

< p>3.2 System Nonlinear Distortion Index 26

3.2.1 Cross Interference Modulation Ratio 26

3.2.2 Carrier Intermodulation Ratio 27

3.2.3 Carrier Combined triple beat ratio 27

3.2.4 Carrier combined secondary beat ratio 27

3.3 system linear distortion 27

3.3.1  amplitude-frequency characteristics 27

3.3.2 Color/bright delay difference 28

3.4 System reflection 28

3.4.1  Cable television system reflection 28

< p>3.4.2 Echo value 29

3.5 Technical parameters and calculation formula 29

3.5.1 Video, RF transmission parameters 29

3.5.2 IP Transmission layer index 33

3.5.3 Stream layer transmission index 33

3.5.4 System index calculation 34

3.5.5 Modular/digital mixed transmission Design index 36

3.6 Network system other Performance parameters 36

3.6.1 Transmission rate and symbol mapping 36

3.6.2 Pulse shaping and roll-off coefficient 39

3.6.3 Eb/No 42

3.6.4 band utilization rate 42

3.6.5 jitter performance 43

3.6.6 reliability and life 44

Chapter 4 Cable Digital TV Network Cables and Connectors 46

4.1 Coaxial Cable 46

4.1.1 Coaxial Cable Structure and Type 46

4.1 .2 Characteristics and indicators of coaxial cable 48

4.2 Optical fiber and optical cable 51

4.2.1 The structure and classification of optical fiber 51

4.2.2 Optical fiber Feature 52

4.2.3 Optical cable 56

4.2.4 New optical fiber 58

4.3 Cable connector 59

4.3.1  distribution 59

4.3.2  Splitter 61

4.3.3 Attenuator, equalizer and power inserter 62

4.3.4 Cable connector and user Terminal box 65

4.4 passive optical device 69

4.4.1 optical power distribution coupler 69

4.4.2 optical attenuator 71

4.4.3 optical isolator 73

4.4.4 optical filter, circulator and polarization controller 74

4.4.5 optical switch 75

4.4.6 Optical connector 78

4.4.7 The performance index of optical fiber connector 80

4.4.8 The use of movable connector 81

4.5 Corridor junction box and optical fiber connection box 81

4.5.1 corridor junction box 81

4.5.2  optical cable junction box 81

4.6  optical wavelength division multiplexing Device 81

4.6.1 The concept of optical wavelength division multiplexer 81

4.6.2 The principle of optical wavelength division multiplexer 82

4.6.3  optical wavelength division The requirements and parameters of the multiplexer 82

Chapter 5 Cable Digital TV Network Equipment 86

5.1 Cable Amplifier 86

5.1.1  Graphical Symbols of the Cable Amplifier 86

5.1.2 Characteristics of cable amplifier87

5.1.3 Main technical indicators of cable amplifier88

5.2 Laser and laser 89

< p>5.2.1 Laser production 90

5.2.2 Laser Features of 91

5.2.3 Laser 92

5.3 Optical Transceiver 94

5.3.1 Optical Transmitter 94

5.3.2 Optical Receiver 95

5.4 optical amplifier 97

5.4.1 The composition and characteristics of optical fiber amplifier  98

5.4.2 Optical amplifier application and product performance 99

Chapter 6 Cable Digital TV Network Information Processing 102

6.1 Pseudo-random sequence and energy diffusion 103

6.1.1 Pseudo-random sequence 103

6.1.2 Energy Diffusion 104

6.2 Error Control Code 105

6.2.1 Error Correction Code Classification 106

6.2.2 Basic Concept 106

6.3 BCH code 110

6.3.1 BCH code structure 111

6.3.2 BCH code characteristics 111

6.3. 3 BCH code engineering application 112

6.4 RS code 113

6.4.1 RS code structure 114

6.4.2 RS code characteristics 115

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6.4.3 RS code application in engineering 115

6.5 LDPC code 118

6.5.1 LDPC code structure 118

6.5. 2 LDPC code characteristic 120

6.5.3 LDPC code application in engineering 120

6.6 Convolutional code 123

6.6.1 Basic concept 123

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6.6.2 Convolutional encoder example 124

6.6.3 Convolutional code decoding 125

6.7 Interleaving code 126

6.7. 1 The basic concept of interleaving code 127

6.7.2 Convolutional interleaving 128

6.7.3 Pseudo-random interleaving 129

6.7.4  Performance analysis and comparison 130

6.8 High efficiency channel coding 131

6.8.1 Concatenated code 131

6.8.2 Trellis code modulation 131

6.9 Channel coding summary 133

6.10 Digital TV signal modulation and demodulation134

6.10.1 Digital modulation overview 134

6.10.2 Quadrature amplitude modulation 136< /p>

6.10.3 Single carrier and multi-carrier modulation137

6.11 Orthogonal frequency division Multiplexing 138

6.11.1 OFDM basic principles 139

6.11.2 OFDM modulation DFT realization 140

6.11.3 OFDM modulation characteristics 140

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6.11.4 TDS-OFDM modulation 141

6.12 Digital TV modulation performance comparison 142

6.12.1 Modulation example 142

6.12. 2 Several performances after modulation 143

Chapter 7 Cable digital TV network front-end system 147

7.1 "Front-end system basics 147

7.1.1  Digital TV signal The formation of 147

7.1.2 Digital video coding technology 150

7.1.3 Statistical multiplexing and rate correction 153

7.1.4 Digital TV signal Baseband transmission 159

7.1.5 Transmission system composition and function layering 165

7.2 DVB-C front-end system 166

7.2.1  Digital TV front-end composition 167

7.2.2 channel coding and high-frequency modulation168

7.3 DVB-C2 front-end system 171

7.3.1 C2 system structure overview 172

7.3.2 DVB-C2 sender system structure 175

7.4 IP-based front-end system 180

7.4.1 IP-based front-end system 180

< p>7.4.2 "Advantages of IP-based front-end system 181

7.5" On-demand TV front-end system 182

7.5.1" Basic concept and system model 182

7.5. 2 Video-on-demand system architecture, functional modules 184

7.5.3 Distributed deployment architecture 186

7.5.4 NGB video-on-demand system process 187

7.5.5 EQAM deployment 191

7.5.6 Video server deployment 192

Chapter 8 Front-end system construction and equipment 195

8.1 Front-end system design 195

< p>8.1.1 The main task of front-end design196

8.1.2 The main content of front-end design196

8.1.3 Front-end system function requirements197

8.1 .4 Front-end system equipment selection 198

8.1.5 Front-end system technical requirements 198

8.2 Encoder principle and realization 199

8.2.1 Encoder Principle 199

8.2.2 Encoder hardware realization 200

8.3 Multiplexer function and realization 206

8.3.1 Multiplexer function 206

8.3.2 Multiplexer implementation technology 209

8.3.3 Statistical multiplexing 212

8.4 Typical IP-based front-end equipment 213

8.4. 1 DVB-IP gateway 213

8.4.2 Media transmission switching equipment 213

8.4.3 Edge modulator 213

8.5 QAM modulator characteristic requirement 214< /p>

8.6 Front-end system construction considerations 214

8.6.1 Overall network management 215

8.6.2 Device compatibility 218

8.6.3 Core The impact of equipment on system quality 218

Chapter 9 Conditional Access and Middleware 220

9.1 CA System Overview 221

9.2 CA Technology Development 221

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9.2.1 The origin of the CA system222

9.2.2 CAS market status 222

9.2.3 Machine card separation 222

9.2. 4 Software and hardware separation 223

9.3 Downloadable conditional access system technical specification 224

9.3.1 DCAS system architecture 224

9.3.2 Terminal security chip function 226

9.4 CAS after the separation of software and hardware 227

9.4.1 Decryption algorithm and key protection 227

9.4.2 Hardware cloning protection 228

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9.4.3 CW sharing security risks of smart card CA 228

9.4.4 The future of digital TV CAS 228

9.5 CA technology and standards 229

9.5.1  MPEG-2 CA-related regulations 229

9.5.2  DVB CA-related regulations 229

9.6  Typical CA system structure 230

< p>9.6.1 Program Information Management System 230

9.6.2 User Management System 230

9.6.3 Descrambling System 230

9.6.4 Control Word 231

9.6.5 encryption and decryption system 231

9.7 CA system security technology 231

9.7.1 CA system three-level key system 231

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9.7.2 CA system security system 232

9.8 The realization of CA system 232

9.8.1 Same secret conditional access 232

9.8.2 Multi-secret conditional access 233

9.8. 3 Comparison of the two methods 234

9.9 DRM system 234

9.9.1 Basic concept 234

9.9.2 Working principle 234

9.10 Digital TV middleware overview 235

9.10.1 What is middleware 235

9.10.2 The role of middleware236

9.10.3 Opening middleware Features of software 236

9.11 Middleware system architecture 237

9.11.1 Software overall model 237

9.11.2 Drive and resource system software model 240

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9.12 Middleware transmission protocol model 241

9.12.1 One-way broadcast channel 242

9.12.2 Two-way interactive channel 243

9.13 Middle The running engine of the software-Java 243

9.13.1 Java technology 243

9.13.2 Java composition 244

9.13.3 Java virtual machine 244

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9.14 China TVOS middleware technology TVM 244

9.14.1 TVM environment 245

9.14.2 TVM solution overview 245

Chapter 10 Integrated Business Operation Support System 247

10.1 Operator BOSS Overview 247

10.1.1 Concept 248

10.1.2 System Function 248

10.2 Cable BOSS concept 249

10.2.1 BOSS development history 249

10.2.2 Telecom BOSS 250

10.2.3 Cable BOSS basic concept 250< /p>

10.3 Cable BOSS architecture and main functions 251

10.3.1 Cable BOSS system architecture 251

10.3.2 Cable BOSS function framework 251

< p>10.3.3 Cable BOSS external interface framework 252

10.3.4 System function 253

10.3.5 Cable BOSS specific function 253

10.4 Cable BOSS Data Model 254

10.4.1 Cable BOSS Information Model 254

10.4.2 Shared Information Model 255

10.4.3 Data Model 255

10.5 Cable BOSS technology implementation 257

10.5.1 Software architecture 257

10.5.2 Cable BOSS integration technology 258

10.5.3 Infrastructure Requires 258

10.5.4 Security Architecture 258

10.6 Cable BOSS Implementation Guide 259

10.6.1 Implementation Control 259

10.6 .2 Construction Management and Control 260

10.6.3 System Deployment 263

Chapter 11 Cable Digital TV Network Information Transmission 265

11.1  Amplitude Modulation Optical Fiber Trunk Transmission System 265< /p>

11.1.1 Basic composition 265

11.1.2 Direct modulation optical transmitter 266

11.1.3 External modulation optical transmitter 268

11.1.4 Optical receiver 269

11.2 Digital optical fiber transmission system 271

11.3 SDH transmission technology 273

11.3.1 Frame structure and overhead 273 p>

11.3.2 Multiplexing and Mapping274

11.4 Broadband IP Technology275

11.4.1 Overview275

11.4.2 Technology Comparison 277

11.5 WDM transmission technology 277

11.6 Multi-service transmission platform MSTP 278

11.6.1 MSTP concept 279

11.6.2 MSTP category 279

11.6.3 MSTP function and technical features 279

11.6.4 MSTP key technology 280

11.7 optical access network 280

11.7.1 Optical Access Network Overview 280

11.7.2 Optical Access Network System Structure 281

11.7.3 Active Optical Network 282

11.7.4 Passive Optical Network 283

11.7.5 Passive Optical Network Multiple Access Technology 284

11.7.6 Optical Ethernet 285

Chapter 12 Cable TV Network Value-Added Services 287

12.1 NGB-oriented interactive service platform 287< /p>

12.1.1 Basic overview of triple play 288

12.1.2 Radio and television interactive service development status 288

12.1.3 Basic module of interactive service platform 288< /p>

12.1.4 NGB’s new requirements for interactive platforms289

12.2 TV Internet content publishing platform290

12.2.1 Related analysis of publishing platform290

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12.2.2 System Overview 291

12.3 Typical Value-added Service 292

12.3.1 Cloud Media TV Service 292

12.3.2 Integrated Informationization Service Platform 299

Chapter 13 Design of Cable Digital TV Network Transmission System 302

13.1 Fiber Transmission System Classification 302

13.2 Subcarrier Multiplexing Fiber Optic Transmission System 303

13.2.1 Optical signal baseband modulation and subcarrier modulation 303

13.2.2 Subcarrier multiplexing optical fiber transmission system principle and classification 303

13.2 .3 SCM optical fiber transmission system characteristics 305

13.3 AM-IM system design 305

13.3.1 AM-IM system overall planning 305

13.3.2 光Transmission technology selection 306

13.3.3 1310nm system design 307

13.3.4 1550nm system design 309

13.4 DM-IM system design 310

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13.4.1 DM-IM system index 310

13.4.2 system index allocation and measurement point 312

13.5 digital optical fiber communication link design 314

< p>13.5.1 Design step 314

13.5.2 Design method 315

13.6 Fiber to the premises transmission system 319

13.6.1  EPON principle 319 p>

13.6.2 GPON principle 324

13.7 HFC access network 326

13.8 NGB definition, characteristics and key technologies 326

13.8. 1 NGB definition 327

13.8.2 NGB characteristics 327

13.8.3 NGB core common technology 328

13.8.4 NGB development direction 329

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13.9 NGB-based broadband access network technical specifications 329

13.9.1 CD OCSIS technical specification 330

13.9.2 C-HPAV system technical specification 335

13.9.3 HINOC technical specification 337

13.10  NGB-based broadband access network Technological development 341

13.11 Cable digital television network construction 342

13.11.1 One-way broadcast network 342

13.11.2 Two-way network 343

< p>13.11.3 RF superimposed video networking 349

Appendix A Commonly used professional terms and abbreviations 354

Appendix B Digital TV front-end system structure diagram 361

Appendix C Provincial digital TV broadcast control center block diagram 362

Appendix D City front-end system block diagram 363

Appendix E County (city, district) digital TV sub-front-end schematic diagram 364< /p>

Appendix F Jiangsu province, city, county digital TV three-level transmission network architecture diagram 365

Reference 366

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