G - Physics – 09 – F
Patent
G - Physics
09
F
G09F 27/00 (2006.01) H03G 3/32 (2006.01) H03G 7/06 (2006.01) H03G 7/08 (2006.01) H04N 5/44 (2006.01) H04N 5/60 (2006.01)
Patent
CA 2091590
2091590 9204772 PCTABS00011 An audio-visual reproduction system comprising an audio signal source, a video signal source and a plurality of audio-visual reproduction devices connected to the audio source and the video source via respective audio and video channels, each said device thereby reproducing combined audio-visual material, each device including an automatic audio volume control circuit, and, position proximate the device, an audio transducer generating an output signal in dependence upon ambient noise in the vicinity of the device, the volume control circuit being arranged to apply a level of gain or attenuation in reproducing the audio signal from the audio source responsively to the audio signal level, so as to reduce the effect of the audio signal component within the ambient noise upon the level of gain or attenuation.
Gore David Norman
Hayton Edwin Charles
Kemp Michael Joseph
Puddifoot Graham John
Caldwell Roseann B.
Concourse Communications Limited
Kemp Michael Joseph
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