meaning of astra digital radio
1. Astra Digital Radio Digital Radio over satellite, compatible with analog television transmissions. Alternatively the normal TV subcarriers can be modulated by a MPEG-1 Layer-2 48 kHz 192 kbps signal. Quality is better than analog carriers and only needs half the bandwidth analog stereo = 2 carrier, digital stereo = 1 carrier. Quality is limited and the data rate cant be increased.