Patent ID: 6552753
Filing Date: 2003-04-22
Classification: H04N

Abstract:
An apparatus forming part of an audio system for maintaining uniform sound volume for all channels and programs transmitted by the audio system, including:a digital signal processor that includes a central processing unit, RAM storage means and ROM storage means, an analog digital convertor for converting a digital signal into an analog signal and for converting an analog signal into a digital signal, a voltmeter for measuring at definite intervals of time on a first channel a level of a first volume of a tension on an output of a sound amplifier of the audio system, said first volume of the tension being proportionate to a volume of sound, and for measuring at definite intervals of time on subsequent channels a level of a second or subsequent volume of the tension on the output of the sound amplifier, said voltmeter being capable of transmitting said first volume of the tension or said second or subsequent volumes of the tension to the RAM for recordation, said voltmeter being controlled by the digital signal processor, a SAVE button on the apparatus protruding from the audio system and/or a remote control device controlling the audio system for activating the voltmeter, a switch for switching the apparatus on and off, said digital signal processor being capable of calculating a difference between the level of the first volume of the tension recorded in the RAM and the level of the second or subsequent volume of the tension recorded in the RAM and if the difference is positive or negative sending a signal to the sound amplifier to adjust the coefficient of amplification of a sound and thereby adjust the level of the second or subsequent volume of the tension on the output until there is no difference between the level of the first volume of the tension and the level of the second or subsequent volume of the tension, and being capable, by controlling the switch, of switching the apparatus off after the level of the first volume of the tension is recorded by the RAM, switching the apparatus on after the level of the second or subsequent volume of the tension is registered and switching the apparatus off after calculating the difference between the levels of the first and second or subsequent sound volumes, and a timer controlled by the digital signal processor for manufacturing signals of a time used in calculating a mean volume of the tension.