Broadcast Engineering - April 2008 - (Page 25)

TRANSITION TO DIGITAL DIGITAL HANDBOOK standard, so the operator can make the usual trade-offs between capacity and QoS. Figure 1 on page 22 shows the distribution network with the primary satellite transmitter. Local gap ﬁllers Handsets It is proposed that handsets would use diversity receivers with two antennae a few centimeters apart. The receiver module could incorporate the two tuners and operate at UHF carrier. The urban repeaters could add further channels, between 18 and 36 channels of 256kb/s. Combine this with unicast VOD 3G, and that represents a compelling service offering for mobile video. Summary There are several standards for the delivery of TV to handheld devices. The business model is the unknown. Is the public prepared to pay for the service? As the only way is to offer a service, the decision to invest is being made cautiously. Some countries use DVB-H, FLO and DMB; others wait for spectrum. DVB-SH offers an alternative where L-band or UHF is not available, but provides common standards to DVB-H and 3G so that handsets can be manufactured for the mass market, and 3G transmitter equipment and locations can be used for the terrestrial coverage. BE There are several standards for the delivery of TV to handheld devices. The business model is the unknown. (A) could be fed via a ﬁber broadcast transmission network and could inset local content. Personal gap ﬁllers (B) could be used in apartment blocks, dorms and so on, but without content insertion. And mobile repeaters (C) could be used in buses, ferries or trains, wherever the satellite signal cannot be guaranteed. (for DVB-H) and 2.2GHz S-band. The combination of SFN transmission and diversity reception should counteract the drawbacks of S-band against UHF in urban areas. Services Proposed services could support nine 256kb/s channels in a 5MHz THIS BOX HAS In an ideal world, high quality video could be transported from one place to another, in real-time, without error. Okay, while the world may not be ideal, the solution is pretty close: Streambox. Our broadcast and broadband solutions work over a variety of IP networks and speak a variety of languages: NTSC, PAL, and NTSC-J. And our error correction is heroic—no hiccups, delays or jitter. Closed captioning? Perfectly articulated. Look, if you want to move video content without losing anything in translation, start communicating with us. Learn more at www.streambox.com or call +1.206.956.0544 ext 222. SEE US AT NAB, BOOTH #SU15515 April 2008 | broadcastengineeringworld.com 25 http://broadcastengineeringworld.com

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Broadcast Engineering - April 2008 Contents Editorial HD Newsrooms Wavelet Compression Mobile TV Audio Processing for HDTV, Part 1 QoE for IPTV End Users NAB Update Asset Management Advertisers Index

Broadcast Engineering - April 2008

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