Audio signal expander apparatus

Details Audio signal expander apparatus Audio signal expander apparatus

1992-03-13

1992-10-27

Fleming, Michael R.

Electrical audio signal processing systems and devices

Binaural and stereophonic

Hearing aid

G10L 302

Patent

active

051596369

ABSTRACT:
An audio signal expander apparatus for integration into a satellite receiver for recovering audio signal transmissions carried by satellite services utilizing compressed audio signal transmission processing wherein the incoming audio signal is expanded by a ratio which varies with both the audio signal amplitude and audio signal frequency. The audio signal passes first through a low-pass filter and then through a frequency selective negative feedback circuit the output of which is filtered and de-emphasized. In addition, the level of the output audio signal may be varied by a level control adjustment.

REFERENCES:
patent: 3559068 (1971-01-01), Almering et al.
patent: 3571515 (1971-03-01), Buro et al.
patent: 3798562 (1974-03-01), Takahashi et al.
patent: 4631746 (1986-12-01), Bergeron et al.

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