Astra Digital Radio
<audio> 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 can't be increased.
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