(under the class definition) Subject matter where there is either an expansion or reduction of the bandwidth required for transmission of a sound signal.
(1) Note. This subclass and its indents provide for bandwidth compression or expansion of audio signals other than speech signals.
SEE OR SEARCH THIS CLASS, SUBCLASS:
200+, for expansion or reduction of a speech signal's bandwidth.
503+, for time compression or expansion of audio signals.
SEE OR SEARCH CLASS
333, Wave Transmission Lines and Networks,
14, for amplitude compression and expansion in a long transmission line. 348, Television,
384+, for bandwidth reduction of a television signal.
358, Facsimile,
426+, for bandwidth reduction of a facsimile signal.
360, Dynamic Magnetic Information Storage or Retrieval,
8+, for the use of a magnetic recorder to alter the bandwidth of a signal.
369, Dynamic Information Storage or Retrieval,
60, for the use of a dynamic storage device to change the bandwidth of a signal.
370, Multiplex Communications,
118, for bandwidth compression in a multiplex system.
375, Pulse or Digital Communications,
240+, for bandwidth compression or expansion of a pulse or digital signal.
381, Electrical Audio Signal Processing Systems and Devices,
106, for amplitude compression or expansion.
455, Telecommunications,
72, for message signal compression or expansion in an analog signal modulated carrier wave communication system.
