SIRIUS Backseat TV to Take 1/5 of SIRIUS Bandwidth
28 04 2007
Background: The much-anticipated satellite in-car (backseat for Americans) TV will be produced by automotive parts maker Delphi based in Michigan. Chrysler will be the first cars that will house the SIRIUS Backseat TV, which will feature Disney, Nickelodeon and Cartoon Network programming. Expect the Backseat TV to come optional in Jeep and Dodge vehicles by the end of the year. Two antennas will be mounted on the roof. Pricing is around $470 including one-year service warranty. The service carries a monthly fee of $13.
Bandwidth: What kind of resolution can we expect from Satellite broadcast TV in the States? From the geeks at Satellite Radio Techworld: “So, we can calculate that video [Sirius Backseat TV] will consume 2.5 MHz of the 12.5 MHz band, or 0.625 to 0.833 MHz per channel. Since it is broadcast on 3 carriers (two satellites and one repeater), the numbers have to be divided by 3, meaning that each channel per carrier will consume 208 to 278 KHz. If we understand the technology correctly, that should translate into video streaming somewhere on the order of 625 to 833 kbps per channel.” And that isn’t bad at all.
The WCS Coalition (AT&T, Sprint Nextel, BellSouth, NextWave, Comcast and the WCA ) have raised concerns to the FCC that video would create more interfere than audio, using over-powered terrestrial repeaters.
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