Apparatus for automatically adapting the mean sound level of a television receiver

A system for automatically adapting the mean sound level of a television receiver fitted both with means for delivering audio signals detected within at least one sound path of a composite video signal and means for delivering video image signals detected from said composite video signal, comprising an adapting module comprising both a video adapting circuit comprising at least one additional input highpass filter and fixed-gain video amplifier connected in series and interposed in the video image processing circuits at said means for providing video image signals, and secondly, an audio adapting circuit interposed in said sound path at said means for providing audio signals, to detect the mean sound input level, to detect the mean sound input level, to compare said mean sound level with a pre-established reference mean level, and automatically to adapt the output mean sound level to maintain it at said pre-established reference mean level,

• wherein said means for providing audio signals and video image signals comprise a first standardized connector and a second standardized connector having said adapting module connected thereto, and
• wherein each of the standardized first and second connectors has a slow switching terminal, wherein the slow switching terminal of the first standardized connector is connected to a DC power supply defining a high level, wherein the slow switching terminal of the second standardized connector is connected to a circuit for controlling a relay for switching at least a first contact between an input of the adapting circuit and one or other of the input and output terminals of an audio path of the second standardized connector and at least one second contact between a video input terminal of the standardized first connector and one or other of terminals internal to the adapting circuit respectively to a video input terminal of the second standardized connector and to a video output terminal of the first standardized connector.