TV Technology - January 7, 2009 - (Page 12)

NEWS Mobile CONTINUED FROM PAGE 1 ence to a licensee’s other DTV services running concurrently, such as HD channels and/or SD multicasting. “During the Candidate Standard stage we hope to get feedback from companies who are implementing the system,” said ATSC President Mark Richer. “We do not expect to receive many suggestions to make major substantive changes in the specifications. However, given the length and complexity of the documents, it is likely we will receive many comments suggesting editorial changes in order to clarify the text.” Achieving Candidate Standard status also typically sends a clear message to all parties that the time to commence development of compatible devices and services can now get underway. And then it will be largely up to CE makers to devise as many different types of products using the ATSC Mobile TV standard as technology, creativity, capital, and the current economy will permit. [Supporters of the Candidate Standard are holding a special demonstration—sponsored by Harris, LG and Samsung—at a briefing at the 2009 International CES in Las Vegas this week.] The Open Mobile Video Coalition, a consortium of two dozen major broadcast groups pushing the ATSC standard, said between now and early summer it has plans for extensive interoperability testing and trials in various markets. Anne Schelle, OMVC’s executive director, said the This block diagram illustrates the path the ATSC signal takes to get to mobile devices. standard’s “flexible system architecture” technically will support a wide array of options on various still-to-bedesigned devices—including interactivity such as viewer polling and purchases, POD (Push on Demand), PPV, possibly EPG, and necessary storage capabilities. “ATSC Mobile DTV is built around a highly robust transmission system that is carried in digital broadcast channels without any adverse impact on legacy receiving equipment,” Schelle said. “Because mobile DTV is built on top of the existing digital broadcast television system, it’s anticipated that the cost to broadcasters will be relatively small.” THE DIFFERENTIATOR Timing may be crucial for any successful launch of the ATSC spec because the term “mobile TV” will not be a new one for many consumers. There are other forms of mobile video (most of it not live) currently in the market—notably from MobiTV, iTunes, MediaFLO, and all those hundreds of Web sites which offer video podcasts, often directly from the big A ‘Flexible Framework’ ATSC’s A/153 Candidate Standard covers eight modules by Jerry Whitaker WASHINGTON T he work to develop a comprehensive standard for mobile and handheld services—known as “ATSC Mobile DTV”—has reached a milestone with publication of the A/153 Candidate Standard document set. ATSC Mobile DTV is built around a highly robust transmission system based on vestigial sideband (VSB) modulation coupled with a flexible and extensible Internet Protocol (IP) based transport system, efficient MPEG AVC (ISO/IEC 14496-10 or ITU H.264) video, and HE AAC v2 audio (ISO/IEC 14496-3) coding. The ATSC Mobile DTV Candidate Standard describes the methodology for new services to be carried in digital broadcast channels along with current DTV services without any adverse impact on legacy receiving equipment. In addi- Fig. 1: The overall A/153 documentation structure. tion to live television, the ATSC Mobile DTV sys- Internet-based applications and tem provides a flexible application transactions with television content. framework to enable new receiver The major elements of the ATSC capabilities. Receivers that make use Mobile DTV system have been of an optional Internet connection selected and documented. On Nov. will enable new interactive television 25, the Technology and Standards services, ranging from simple audi- Group (TSG) approved publication STANDARD, PAGE 13 ence voting to the integration of four broadcast networks. Charles Golvin, principal analyst for mobile technology at Forrester Research in Cambridge, Mass., thinks the mobile environment is already confusing. “I think what does not confuse consumers is the difference between ‘live’ and ‘on-demand’ and the ATSC M/H content will very clearly be in the ‘live’ camp,” he said. “There it will compete directly with Qualcomm’s MediaFLO, which is preparing to significantly expand its footprint with the DTV transition.” Golvin said the “free-to-air” mobile model has been very successful in some key markets like Japan, where penetration of TV-capable handsets far outstrips subscriber-based models. OMVC’s Schelle also emphasizes that because the Candidate Standard is a point-to-multi-point broadcast service, “It is not bandwidth-constrained like other current real-time mobile TV services. That means better quality for consumers [which] will be noticeable in terms of signal availability, as well as better picture quality and resolution.” Also, ATSC’s Richer adds, “The physical [RF] layer is unique because it must be backwards-compatible with the existing ATSC DTV system and provide high performance in a broadcast environment.” That “single point-to multi-point system” (the very definition of broadcasting itself) will be especially important when large user groups are in play, according to Jay Adrick, vice president for broadcast technology at Harris Corp. Harris (and some of its competitors) are already involved in talks with local stations about the hardware necessary for the new standard—such as encoders, multiplexers, encapsulation devices, exciters, as well as the creation of electronic service guides and content protection. As an example, Adrick points to the night Barack Obama was elected president. “They had a quarter-of-a-million people or more in Grant Park in Chicago, yes?” Adrick said. “Let’s say 100,000 of those people had mobile TV devices using the new broadcast standard [to watch Obama live]. No problem. But if those same people were using cellular-based devices for their mobile TV, you’d get about 40 or 50 devices on a cell and it would simply crash. Not so with a single point to multipoint mobile system.” Technically speaking, however, being perceived as different from the rest of the mobile TV pack may not necessarily be a key objective for broadcasters. “Actually, one of our goals is to have many technologies be similar to other mobile TV systems in an effort to foster interoperability and to minimize time-to-market,” said Richer, who had planned to make the entire text of the Candidate Standard available on the ATSC Web site (www.atsc.org) by New Year’s. I 12 January 7, 2009 • TV Technology • www.tvtechnology.com http://www.atsc.org http://www.tvtechnology.com

Table of Contents Feed for the Digital Edition of TV Technology - January 7, 2009

TV Technology - January 7, 2009 NFL Enters a New Dimension Mobile DTV Looms Large in 2009 Contents A ‘Flexible Framework’ Doing More With Less ‘X’tra-Streamlined Finish Line in Sight for BAS Transition Ahead of the Relocation Curve DTV Transition Survival Guide ENG and the Lines of Communication DTV Transition Survival Guide Who Do We Really Work For? Obama to Expand Internet Access The Wizard Takes a Holiday The Solid-State Disk Revival To Light the Ear... or Not Hulu Gets It Right—the First Time User Reports—Video Servers & Recording/Controllers Reference Guide Product Showcase Classifieds Marketplace TV Tech Business

TV Technology - January 7, 2009

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