Text 12887, 107 rader
Skriven 2006-09-07 17:20:56 av /m (1:379/45)
  Kommentar till text 12872 av Geo (1:379/45)
Ärende: Re: wireless HDMI interface coming soon via ultrawideband?
==================================================================
From: /m <mike@barkto.com>



95% of PCs == Windows.

That's why many people think PCs are unreliable.

 /m<g>

On Wed, 6 Sep 2006 22:01:14 -0400, "Geo" <georger@nls.net> wrote:

>PC's <> Windows
>
>Geo.
>
>"/m" <mike@barkto.com> wrote in message
>news:s1vuf2df4c28a02k2qnsh9d0htq4sshpv7@4ax.com...
>>
>> Why introduce PCs into the mix?  Windows only complicates matters and
>> reduces the reliability of the overall system.
>>
>>   /m
>>
>> On Wed, 6 Sep 2006 21:36:50 -0400, "Rich Gauszka" <gauszka@hotmail.com>
>> wrote:
>>
>> >Being able to handle 3 or more HD streams at 30 feet sound good.
>> >Unfortunately I don't see any mention of the system being incorporated in
>> >PCs
>> >
>>
>>http://www.extremetech.com/article2/0,1558,2011975,00.asp?kc=ETRSS02129TX1K
>0000532
>> >
>> >On Tuesday, Tzero Technologies and Analog Devices announced that they
>have
>> >created a wireless HDMI interface for HDTVs, next-gen DVD players, and
>> >set-top boxes.
>> >The companies' first wireless HDMI setup is a standards-based system,
>> >predicated on the standards set forth by Panasonic, Philips, Samsung,
>Sharp,
>> >and Sony in July of 2003. Other wireless HDMI technologies introduced to
>> >date have been proprietary, both Tzero and Analog Devices alleged.
>> >
>> >Wireless HDMI (high-definition multimedia interface) enables wireless
>video
>> >and audio connections between all types of home entertainment products
>such
>> >as HDTVs, DVD players, set-top boxes, and game systems. It allows HDMI
>> >content to stream to several devices without a tangle of wires. The
>backbone
>> >for the technology is ultrawideband, also used as a future replacement
>for
>> >wired USB.
>> >
>> >The standard calls for link reliability of at least 95 percent, packet
>error
>> >rate of less than 1 in one hundred million, interference resistances for
>> >microwaves and cordless phones, and the ability to process three or more
>HD
>> >streams at 10 meters.
>> >
>> >"The primary thing that is the most challenging is linked with
>reliability,"
>> >said Dan Karr, vice president of marketing for Tzero. "It needs to be
>good
>> >under all conditions. Wi-Fi serves this market very well, but in a video
>> >environment you can see that would be very problematic."
>> >
>> >The wireless HDMI system consists of a transmitter and receiver. The
>> >transmitter is a black box about the size of a laptop. Karr says that it
>is
>> >"bigger than necessary, and that's because it's new, but it will get
>> >smaller."
>> >
>> >The transmitter integrates the Tzero TZ7000 chipset and Analog Devices'
>> >JPEG2000 compression integrated circuits. The Analog Device compresses
>data
>> >with JPEG2000 video code, which is then packetized and encrypted, and
>> >transmitted via the Tzero MAC and PHY chip. The chip transmits over the
>air
>> >to the receiver where the audio/video data with HDMI is decompressed and
>> >presented to the display device via the HDMI port.
>> >
>> >JPEG 2000 is a relatively new image compression standard that was
>approved
>> >by the JPEG committee. It can operate at higher compression ratios
>without
>> >the characteristic blocky and blurry effects of the original JPEG
>standard.
>> >
>> >"We pass the video through the JPEG2000 and then pass the video and audio
>> >through the Tzero chip," said Bill Bucklen, director for the Advanced TV
>> >Segment with Analog Devices. "You can't compress a content-protected
>signal
>> >so we've built a repeater function and because we encrypt the link, it's
>> >like we've taken a repeater and put them on the other side of the room."
>> >
>> >
>> >
>> >
>> >
>

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