 The use of MPEG-4 compression allows the satellite to carry significantly more channels than it could using MPEG-2 compression.Receiving signals from DirecTV-10 requires an advanced receiver capable of decoding MPEG-4 signals, such as the H21 or HR21, and a 5-LNB Ku/Ka dish, such as the AT-9 "Sidecar".These receivers also receive MPEG-2 channels and offer interactive services.