Sundirect uses less compression in picture and audio but other DTH use high compression which will alter video or audio quality and can add extra channels in transpoder space. Sundirect doesn't want to compromise in pq aq it waited for many years to add channels otherwise it could have done compression on its transpoders and it would be in top 3 DTH .Now it looks sundirect got sufficient transpoder space and still it will maintain its is pq and aq. One more strong point if you take sundirect soon it's going to launch 7.1 digital dodly in India for HD channels don't miss this opportunity to enjoy this feature.