Abstract: An audio system has an attacher station for attaching to and decoding an audio representation channel, which also has a first auxiliary information sub-channel. A user station is fed by the attacher station through a unidirectional interface and receives the auxiliary information in an application context under control of a user interface for selective displaying. The attacher station extracts the auxiliary information from the channel. The system also has a framework data generator that is instantiatable by information from the information sub-channel, and a framework packetizer fed by the generator for supplementing the audio representation channel on said unidirectional interface in a second auxiliary information sub-channel by packetized and instantiated application information for the user station.

Abstract: A serial/parallel converter includes a shift register arrangement (12', 12" to 12.sup.n) and an output register arrangement (13', 13" to 13.sup.n), each of which includes n storage devices (12', 12" to 12.sup.n ; 13', 13" to 13.sup.n). Each of the storage devices (13', 13" to 13.sup.n) of at least the output register arrangement includes two data inputs (DP, DS), a selection input (S) for selecting a data input, a clock input (CLK) as well as a data output (Q). The individual clock inputs (CLK) of the storage devices (13', 13" to 13.sup.n) receive a serial data signal and the selection inputs (S) receive a frequency-divided clock signal. Second data inputs (DS) of the storage devices (13', 13" to 13.sup.n) are connected to the data outputs (Q) of the shift register arrangement (12', 12" to 12.sup.n), the first data input (DP) of said storage devices being connected to the own data output (Q). The data signal can be derived in parallel from the data outputs (Q) of the storage devices (13', 13" to 13.sup.n).