Craig Birkmaier wrote: > Just because both camps have licensed HDMI technology, this > does NOT mead both approaches will support the save service > levels. How are you going to deliver even 720P uncompressed > over a UWB/HDMI link? You'll need about 1.5 Mbps. You're right. Ultimately, the 60 GHz scheme is supposed to be able to carry uncompressed 1080p. But for now, wirelessHDMI claims it can carry uncompressed SDTV over UWB. > At 100 Mbps you cannot even deliver 720 x 480 @ 30 interlaced > frames per second. Maybe 640 x 480... They are claiming 480 Mb/s for HDMI over UWB, for now. I don't know that this can't be doubled or tripled before the 60 GHz standard bears fruit, but we'll see. UWB should be able to carry several Gb/s of payload, ultimately. That's why I was wondering what this new 60 GHz spec was going after that was any different. The answer, I do believe, is that they are after new IP and that they need something to circumvent regulatory obstacles in certain countries. Here is the article that talks about UWB. Bert ---------------------------------------- Wireless HDMI effort amasses support Loring Wirbel (11/13/2006 9:00 AM EST) URL: http://www.eetimes.com/showArticle.jhtml?articleID=193501687 Since the emerging WirelessHD effort has put ultrawideband video distribution approaches in the crosshairs, some might expect Tzero Technologies executives to be looking over their shoulders as they head to Dallas this week for the TelcoTV show. But Tzero insists the "wireless HDMI" (High-Definition Multimedia Interface) effort it launched with Analog Devices Inc. is well-positioned and already well-supported. Most UWB semiconductor companies have concentrated on the "certified wireless USB" extensions promoted by the WiMedia Alliance, betting that a wireless replacement for the Universal Serial Bus will outsell other in-home personal-area networks, including the multipoint WiNet standard. Tzero's partial HDMI replacement offers speeds just shy of 500 Mbits/second that can carry standard-definition progressive signals in uncompressed format. WirelessHD members, however, are betting their spec's support for 1,920 x 1,080 progressive scan will be a potent differentiator. In Dallas this week, Tzero will announce hardware development partnerships for wireless HDMI with AboCom Systems Inc. for modules, Asustek Computer Inc. for full HDMI systems and Arcadyan Technology Corp. for residential gateway references. Tzero also has some impressive end customers: Siemens' Home and Office Communication Devices group is developing a UWB home router using the Tzero's 7000 UWB chip set, Amedia Networks Inc. will show a residential gateway, Complete Media Systems Ltd. will demo a UWB set-top box, Entone Technologies Inc. is offering a customer-premises gateway, UT Starcomm will show an IP video gateway and Magnum Semiconductor will demonstrate wireless UWB links to digital recording tools. "That should speak volumes on whether wireless HDMI is ready for prime time," said Tzero vice president of marketing Dan Karr. WirelessHD targets speeds of several Gbits per second, compared with rates of 480 Mbits/s for Tzero's UWB implementation. Kurt Scherf, principal analyst at TV market analyst Parks Associates said WirelessHD can make a case for being a more legitimate HDMI replacement, but he asked "whether the home needs yet another standard. WirelessHD might make more sense 10 years down the road." Karr said Tzero realizes it must compete with advanced wireless LANs like 802.11n, as well as with wired HDMI, MoCA, HomePNA and HomePlug networks. UWB's advantages are wall penetration and non-line-of-sight support. Rajeev Krishnamoorthy, Tzero's founder and CTO, said it's foolish to promote 60-GHz technologies for transport of uncompressed 1,080p video, "since all content is compressed at some point in a network." Krishnamoorthy predicted a "land rush to UWB, since at low frequencies you get very good coverage and lots of bandwidth." All material on this site Copyright 2006 CMP Media LLC. All rights reserved. ---------------------------------------------------------------------- You can UNSUBSCRIBE from the OpenDTV list in two ways: - Using the UNSUBSCRIBE command in your user configuration settings at FreeLists.org - By sending a message to: opendtv-request@xxxxxxxxxxxxx with the word unsubscribe in the subject line.