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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AST ASTAP AST Computers, LLC asterisk asterix	ADR	Astral AST Research, Inc. asymmetrical modulation Asymmetric Digital Subscriber Line Asymmetric Digital Subscriber Loop