the stbs doesnot depend on encryption technology i believe..
only the dth operators use different encryption standards to compress
more channels as per their requirement, its only from satelllite end not from stb's end....
so if TS unlocks the box it may work for any encryption method provided u insert the smart card(digicard) of that operator.
TS digicard is programmed to receive NDS encryption so if we insert dish
tv's
digicard it will be programmed according to their technology and
the stb will accept it i suppose..
Encryption is hardware & software dependent, so NDS card slot on
Tata Sky will NEVER accept CONAX card from DISHTV, but there is device called CAM (
Conditional access module - Wikipedia, the free encyclopedia) which allows to read the card for which CAM is developed. For this our STB should support CAM (DISH TV STB supports CAM I guess as they have provided CAM slot)
Compression technology used by DTH providers is MPEG-2, which provides method by which certain number of channels are compressed and added on any TP, other method is MPEG-4