An Introduction to the Dlna Architecture: Network Technologies for Media Devices

ISBN-13: 9780470881262 / Angielski / Twarda / 2011 / 418 str.

Edwin A. Heredia

Opis

This book describes the architecture and protocols for interconnecting media devices in home networks. The architecture and protocols described in this book have been developed during the last 10 years by R&D teams from several companies working jointly in two industry organizations known as UPnP and DLNA. This book mainly deals with the DLNA (Digital Living Network Alliance) protocol. This text is especially relevant for the design and development of smart homes, where media devices, communication devices, appliances, and sensors are all integrated in an intelligent network.

Recenzje

"Today's connected consumer demands innovative ways to enjoy their content throughout the digital home, including the ability to share photos, music and video across products. The Digital Living Network Alliance (DLNA) has made a commitment to help consumers connect and enjoy their content using any electronic device, from any location in their home, regardless of manufacturer. Edwin Heredia's book provides readers with a great, technical look at relevant opportunities that DLNA provides to integrate technology into consumers daily lives and enhance the overall home entertainment experience via DLNA Certified products."- Donna Moore, Executive Director, Digital Living Network Alliance

Spis treści

Preface xvii

Acknowledgments xxi

Acronyms xxiii

1. Introduction 1

1.2 Networks of Media Devices 1

1.2 Ubiquitous Computing at Home 3

1.3 Home Networking Challenges 5

1.4 Protocols for Networks of Media Devices 6

1.5 Protocol Development 6

2. Scenarios and Models 11

2.1 Usage Scenarios 11

2.2 Control Models 16

2.3 Media Characterization 21

3. Device Classification 25

3.1 UPnP Devices and Control Points 25

3.2 UPnP Media Servers and Media Renderers 26

3.3 Device Taxonomy 29

3.4 Device Classes and Capabilities 30

3.5 Device Nomenclature 41

4. Network Connectivity 43

4.1 Physical and Link Layers 43

4.2 TCP/IP Protocols 44

4.3 IP Addressing 51

4.4 DHCP 53

4.5 Auto–IP 56

5. Discovery Protocols 59

5.1 Root and Embedded Devices 59

5.2 Discovery Messages 60

5.3 Presence Advertisements (SSDP Alive Messages) 63

5.4 Number and Types of Presence Advertisements 66

5.5 Exit Advertisements (SSDP Bye–Bye Messages 67

5.6 Discovery Search Requests (M–SEARCH Requests) 68

5.7 Discovery Search Responses (M–SEARCH Responses) 70

6. Description Protocols 73

6.1 Device Description Document (DDD) 73

6.2 Service Description Document (SDD) 83

7. Server Control Protocols 91

71. The DMS Content Directory Service 92

7.2 The DMS Connection Manager Service 139

8. Renderer Control Protocols 147

8.1 Usage Model 147

8.2 Discovery of Content and Devices 150

8.3 The Connection Manager Service in a DMR 150

8.4 The AV Transport Service in a DMR 156

8.5 The Rendering Control Service in a DMR 182

8.6 Multiple Controllers in the Network 190

9. Exchange Protocols for Actions and Events 193

9.1 Control and Event URLs 193

9.2 Exchange Protocols for Actions 195

9.3 Exchange Protocols for Events 201

10. HTTP Media Streaming 209

10.1 HTTP Servers and Clients 210

10.2 Transfer Modes 211

10.3 HTTP Methods 223

10.4 HTTP Versions 226

10.5 Relevant HTTP Headers 227

11. Media Control Experience 241

11.1 Navigation Operations 243

11.2 Playback Operations 250

12. Digital Media Requirements 269

12.1 Media Formats and Profiles 270

12.2 Proliferation of Media Format Profiles 271

12.3 Exposing Content in a CDS 273

12.4 MIME Types 274

12.5 The Profile ID 275

12.6 Media Interoperability 276

12.7 Mandatory Profiles for the HND Category 279

12.9 Summary of DLNA Media Requirements 280

13. Media Format Profiles 281

13.1 Image Class: JPEG Content 281

13.2 Audio Class: AAC Content 283

13.3 Audio Class: LPCM Content 285

13.4 Audio Class: MP3 Content 286

13.5 Audio Class: WMA Content 287

13.6 A/V Class: AVC Content 289

13.7 A/V Class: MPEG–2 PS Content 290

13.8 A/V Class: MPEG–2 TS Content 293

13.9 A/V Class: WMV Content 301

13.10 MP4 Files 303

13.11 Profiles for Link Protection 303

13.12 Assignment of Profile IDs 304

14. AVT Actions and State Variables 307

14.1 AVT Actions 307

14.2 AVT State Variables 320

15. CDS Actions and State Variables 331

15.1 CDS Actions 331

15.2 CDS State Variables 339

16. CMS Actions and State Variables 341

16.1 CMS Actions 341

16.2 CMS State Variables 344

17. RCS Actions and State Variables 347

17.1 RCS Actions 347

17.2 RCS State Variables 355

Appendix A: Error Codes 359

Appendix B: Size Limits in Data Structures 363

Glossary 365

References 371

Index 379 

O autorze

Edwin A. Heredia is a Senior Program Manager in the Windows Multimedia Platform Team at Microsoft overseeing the design and implementation of innovative pervasive media experiences for home networks and the Internet. He has been working in the fields of communication protocols and media technologies for more than fifteen years. He has been an active participant and lead contributor in a number of worldwide industry standardization projects, including those envisioned by the UPnP Forum and the Digital Living Network Alliance (DLNA). He received an MSc degree in electrical engineering from the University of Delaware.

Blurb

The In–Depth Guide for Interconnecting Media Devices to Create Smart Home Networks

As home computer networks continue expanding to engage with TVs, Blu–ray players, security cameras, appliances, and other devices designed to seamlessly "talk" with one another, the realization of futuristic smart homes looms ever closer on the technological horizon ?and promises to permanently alter the way people consume and distribute media.

An Introduction to the DLNA Architecture provides the framework for countless media–related scenarios envisioned for networks that integrate computing, communications, and consumer devices. The result of a ten–year collaborative project stretching across multiple industries, this invaluable resource offers a comprehensive introduction to the architecture and protocols designed and developed by the UPnP Forum and, most notably, the Digital Living Network Alliance (DLNA). This book:

• Greatly facilitates the study of media distribution over home networks by providing a unified view of the current technologies and protocols
• Draws on the coordinated efforts of R&D teams from leading computer, communications, and consumer electronic companies
• Explores what lies ahead for home–to–home connectivity, phone and voice communications, personal cloud technologies, digital media distribution, and more

Painting a vivid, multilayered picture of network technologies, from physical connectivity to application, An Introduction to the DLNA Architecture guides readers in exploring new avenues for integrating technology more effectively and, in the process, inspire them to pave new pathways for enhancing the overall home entertainment experience.