(under subclass 104) Subject matter having electrical audio signal system combined with provision for decreasing the amplitude range of an applied audio signal or for restoring the full amplitude range of an amplitude compressed audio signal.
SEE OR SEARCH CLASS
333, Wave Transmission Lines and Networks,
14, for amplitude compression/expansion, per se.
370, Multiplex Communications,
202, for amplitude compression or expansion in a multiplex system.
455, Telecommunications,
72, for amplitude compression/expansion in a radio system. 704, Data Processing: Speech Signal Processing, Linguistics, Language Translation, and Audio Compression/Decompression,
500+, for audio signal bandwidth compression or expansion and subclasses 503+ for audio signal time compression or expansion.
