NC200A/IC is an encoder (qpsk modulator) for nicam 728 System B/G, D/K and I. The encoder is mainly used in broadcasting networks, but also used for cable TV and in laboratories. The output is a qpsk modulated carrier at intercarrier frequency, locked to the bit-rate.
Utilising computer calculated time parameters, the compressor action is adapted to human hearing instead of being purely technical gain servo system. The parameters preserve the original impression of dynamics and life of the sound. Beat music still has a driving beat at the compressor output.
Presence and stability of the sound scene is maintained as the compressor is not irresolutely compensating every little level difference, although the algorithm is capable of the performing an exact peak level control. This design prevents internal overload. A control signal cleaning function further reduces distortion normally introduced by fast compression or limiting.
