Originally Posted by cableguy101
Watch out for FiOS BS. They is no difference in picture quality and sound than TWC digital lineup. Digital is digital!! At least from what I have seen with FiOS launched over in Baumont. Also the prices that FiOS is giving customers are just goint to be teaser prices to lure you in, you watch. Prices may be nice and cheap now but once they get more subscribers and figure out how to actually run a TV company, they are gonna realize that they are losing money and are going to need to increase prices to make up for the money they invested in putting Fiber everywhere and to make up what they have lost with the teaser prices. Someone is going to have to pay for the Fiber that was put in, and who you think is gonna get the bill? The customer!! Not only that, how long does it take for Verizon or any Telephone compnay to respond to a trouible call you put in? 2 weeks? maybe longer, and how much do they charge you? Look at TWC, Trouble calls for the most part out here I know are gotten to within a couple days, not weeks like the telco companies! and not only that we dont charge for the Trouble call unless under certain circumstances! Lets see the telco companies beat that service. They are just beginning in TV service, TWC has been doing it for decades!!
It's hard to draw generalities, cuz each SD channel seems to have a different "PQ".
The REALLY BAD SD channels probably originate and are transferred to C-Band
SAT uplink terminals via antique analog equipment....
and then put on the worst of the worst analog C-Band transponders.
[Like perhaps ComedyCentral, E!, LMN, MTV, Spike, TRVL, VH1, WE....]
Additional degradation can then occur in the analog portion of the cable plant....
plus digitization degradation, since HFC cable systems distribute to local node
in digital form, where QAM and Analog Edge Modulators at your local node
convert them to QAM-256 and reconstituted analog simulcast channels:http://www.rgbnetworks.com/products/...48_diagram.jpg
Since it's GIGO, can you really see the extra degradation in the reconstituted
signal coming out of the Analog Edge Modulator (which must undergo additional
degradation throughout your local neighborhood cable network)...compared to the
reconstituted signal coming directly out of your STB??? Depends on the neighborhood....
The BEST SD channels probably originate as MPEG2 and STAY DIGITAL until
converted back to Analog by either the Edge Modulator or (preferably) your STB.
Plus degradation due to bitrate starvation whenever a STATMUX is employed...
This is a golden opportunity to take a good thing (all digital transfer)
and really muck it up by packing too many SD channels on the C-Band uplink
and then recompressing a DIFFERENT assortment of too many SD channels
into each QAM256 cable channel.....
And then there are probably channels that are a mixture of Analog and MPEG2.....
Most of the digital source material feeding today's systems is MPEG2.
Obviously, there will be degradation due to transcoding from MPEG2 to MPEG4,
when conveyed via Uverse and FiOS...and HD for D*, E*.
The transcoding degradation will be higher for already bit-starved LIL-HD channels.
And the degradation should be much less if the source is a pre-encoded, full datarate,
MPEG2 file sitting on the programming service's server....
Redigitizing movies, et.al. is going to take some time, but "soon" Turner
Networks will originate linear programing in both MPEG2 and MPEG4:http://newsroom.cisco.com/dlls/2006/prod_110906.html
Hopefully, other programing sources will follow the same game plan,
eliminating the MPEG2/MPEG4 transcoding operation:http://www.telecommagazine.com/Ameri...?HH_ID=AR_2105http://www.ses-americom.com/americom...m/04_16_07.php
So starting next year, some MPEG4 channels should begin to benefit from
the (alleged) video coding improvements, such as fewer macroblocking events
and even keeping two sets of parameters to follow flashing strobe lights.