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Originally Posted by rangaraj The amount of bandwidth (Megabits/sec) determines the distribution quality of a channel/signal. If the picture is relatively static (such as talking heads in an interview, the bandwidth for a certain quality is less) whereas if it is a music video where the rate of change in each frame is high, then the bandwidth for the same quality is higher. Sports is another good example. DTH operators have a fixed satellite transponder bandwidth and have x number of channels that they broadcast. All these channels have to share this total bandwidth and depending on the bandsidth allocated by the operator - Zee or TataSky or DD, the quality is dependent on it. MAkret conditions - terms of the contract, the premium channels usually get more bandwidth and the not so premium channels get less bandwidth. Of course the inout quality is also very importanta. If you feed a Digi Beta signal vs a VHS signal irrespective of the bandwidth allocated, the VHS signal will still look bad. That is the difference in quality between a sanskar channel and a Sony channel quality..
The difference between Dish and Tata Sky will be how much bandwidth will be allocated. I was with the NDTV guys yesterday, and they mentioned that their signal gets distributed on tata-sky at 3-3.5Mbps whereas on Dish it is around 1.6Mbps. That would explain the quality difference..
ranga raj |
Good to see an expert who knows a lot about this industry.
Would you know if:
- The industry is planning to shift to AVC from MPEG-2? If so, when?
- Who would benefit most? Would the customer get benefit (more quality on same bandwidth) or would the operators pack in more channels keeping the quality levels same?