|
North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: AT&T: 15 Mbps Internet connections "irrelevant"
On Sat Apr 01, 2006 at 01:26:51PM -0600, Frank Bulk wrote: > The majority of U.S.-based IP TV deployments are not using MPEG-4 Agreed. However, I'd say that any IPTV provider currently using MPEG2 would be planning a migration to MPEG4/H.264 - half the bandwidth means double the channels. > in fact, > you would be hard-pressed to find an MPEG-4 capable STB working with > middleware. I disagree. There are several MPEG4 capable STB available now, and they all have support of middleware vendors. > SD MPEG-2 runs around ~4 Mbps today and HD MPEG-2 is ~19 Mbps. With ADSL2+ > you can get up to 24 Mbps per home on very short loops, but if you look at > the loop length/rate graphs, you'll see that even with VDSL2 only the very > short loops will have sufficient capacity for multiple HD streams. FTTP/H > is inevitable. Anyone looking to do HD will be looking at H.264, and looking to bring the bandwidth requirement down to 8-10Mbps. That is certainly more practical with ADSL2+ deployments (unless you want more than one STB per DSL). Simon (Currently working on an H.264 IPTV deployment) -- Simon Lockhart | * Sun Server Colocation * ADSL * Domain Registration * Director | * Domain & Web Hosting * Internet Consultancy * Bogons Ltd | * http://www.bogons.net/ * Email: [email protected] *
|