Answer to this question is....till now at least, all the theory regarding how many channels Tata Sky can add have been explained in retrospective manner...meaning first channel will be added and then a theory to prove it will be discussed. HD channel count was biggest example of such scenario. Where when 9th HD channel was added and when 12th channel was added, same theory was applied to explain. So nobody is really clear on Tata Sky. Certain as a company they should not have been complaining about the situation they are in, rather they should have at least taken decision to go for MPEG4, which was in their hands.