Sound volume control signal for a receiver for block coded speech signals

摘要

The control device includes a coded block receiver which examines incoming blocks of digital words and estimates whether the input level is acceptable or not acceptable. If the level is not acceptable, the output volume is reduced. A detection circuit (10) detects when the signal level received is satisfactory following discontinuous transmission, and activates a command (11) to re-establish a sound volume when the detection level is received.