North American Network Operators Group Date Prev | Date Next | Date Index | Thread Index | Author Index | Historical Re: Cable networks RE: best effort has economic problems, maybe OT
Christopher J. Wolff wrote: Folks,The bandwidth you quote refers to the unencoded signal bandwidth. The actual transmission has the same channel spacing than traditional television, be that NTSC or PAL or SECAM. Terrestial applications typically carry 20-25 megabits and cable & satellite applications typically 40-50 megabits per channel/transponder. HDTV channel usually consumes 19.8Mbps for video plus some extra for audio + multiplexing information. So a channel that used to carry one NTSC analog channel over the air can be used to carry one HDTV channel or in the case of cable/satellite networks, two. I�m all for encapsulating all transmission to IP packets, because it would make a lot of things easier, but I would suspect some places need to freeze first :-) Pete
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