AVS Forums Archives - Baseball at 1.5 billion bits per second versus 19 million bits per second

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Baseball at 1.5 billion bits per second versus 19 million bits per second
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Posted by: John Mason

A company that operates a fiber-optic cable system between Japan and Seattle claims better performance delivering uncompressed HDTV signals at 1.5 Gbps via optical fibers than HDTV signals compressed for delivery via satellites. HDTV programs delivered to homes are received at about 19 Mbps after being shoe-horned into a standard 6-MHz broadcast channel (see HD Ken's 2/11 post here ). Quite a difference.

--John

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[This message has been edited by John Mason (edited 02-24-2001).]

Posted by: SmokeBringer

Sounds good except for one minor detail: How many of us have fiber coming into our "castles". I would love to have that, but I suspect that the "last mile" will be copper for a while yet. Until then, I'm afraid most of us will have to live with the 19Mbs/sec compressed solution.

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Posted by: roman

Of course, anything uncompressed is going to look better. But with compression you could fit 75 (or so) hi-def channels into a 1.5 Gb pipe.

Can you say "HD-only digital cable TV?"

Oh well, I could dream B)

Posted by: John Mason

So true, SmokeBringer. In my case, the 'last mile' is just a hundred feet or so since Time Warner Cable runs its fiber(s) into the basement of my apartment building. All the coax and amps between me and the fiber(s) limits my bandwidth to roughly 1 GHz.

Some experimental setups are underway, as you may know, with fiber-to-the-set. Info is hard to come by in this area. A post I made in the fiber optics newsgroup brought a response and company hardware website from Great Britain.

Love my HDTV reception, of course, but looking forward to enhancements. Not sure what percent of 1.5 Gbps uncompressed HDTV will make it from hard-disc storage to giant screens in theaters. Not even sure if Time Warner Cable doubled the bandwidth of my HDTV programs, to 38 Mbps, I'd be able to appreciate it on a 9-in-CRT 64-in. RPTV (assuming TWC provided a 'special' converter).

But the cable companies, as news of upcoming video-on-demand transmissions illustrates, have lots of fiber bandwidth to play with. One of them might get the loony idea of mounting two HDTV cameras with their lenses several inches apart, setting them up at a sports event, and cablecasting stereoscopic 3D views with a whole 38-Mbps signal!. We might have to endure 3D IMAX-type switched-LC glasses, but I'd volunteer.

--John

------------------
STOP DVI/HDCP AND DFAST
What is dvi/hdcp?
What is dfast?
Visit: home recording rights

[This message has been edited by John Mason (edited 02-25-2001).]

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