AVT MAGIC ISDN, Описание аппаратуры

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PA G E 2 1
S Y S T E M D E S C R I P T I O N
2 S Y S T E M D E S C R I P T I O N
2.1 General
Due to the cost advantages offered by the efficient utilisation of available
transmission capacities, low-bit-rate encoding is becoming increasingly im-
portant for the transmission of audio signals. The MAGIC system (Multi Audio
system with Groupable Interfaces and Codecs) was developed for this rea-
son. With the system, high-quality audio signals can be transmitted bidirectio-
nally in CD-transparent quality. Its main application is the transmission of one
or more channels via ISDN, satellite or data networks.
All standardised methods of data reduction for audio signals (ITU-T G.711,
G.722, G.728, ISO/MPEG Layer II (DAB) and III) are integrated into the MA-
GIC system. The procedures which ensure secure and synchronous transmis-
sion also comply with international standards and recommendations (ITU-R
J.52), thus guaranteeing the future-oriented concept of the MAGIC system as
well as its compatibility with all systems implementing these standards
REMARK In order to be able to make full use of the functions of the
MAGIC audio system, we recommend that you read chapters
2 and 3 first.
FIGURE 2.1 MAGIC ISDN UNIT