Digital wireless audio transmission system with optimized dynamics

A digital audio transmission system comprising:

• at least one wireless transmitter;
• and at least one wireless receiver;
• wherein the wireless transmitter comprises:
• an analog input;
• a digitally adjustable input potentiometer configured to adjust the input gain;
• an analog/digital converter configured to convert the analog signals into digital signals;
• and
• a digital signal processing unit configured to perform digital signal processing;
• wherein the digital signal processing unit is adapted to adjust a gain of the digital input potentiometer in such a way that a dynamic range of the analog/digital converter is optimally utilized;
• wherein, by virtue of an abrupt severe rise in amplitude of an acoustic useful signal, a fresh adjustment of the digitally adjustable input potentiometer is very rapidly effected to prevent overdriving;
• and
• wherein the very rapid actuation of the digitally adjustable input potentiometer is effected by an interrupt routine of the digital signal processing unit or an additional hardware specifically adapted thereto.

A method of controlling a digital wireless audio transmission system;

• wherein the audio transmission system has:
• a wireless transmitter;
• and
• a wireless receiver;
• wherein the wireless transmitter has:
• an analog input;
• a digitally adjustable input potentiometer configured to adjust the input gain;
• an analog/digital converter configured to convert the analog signals into digital signals;
• and
• a digital signal processing unit configured to perform digital signal processing;
• wherein the method comprises the steps:
• adjusting a gain of the digital input potentiometer so that a dynamic range of the analog/digital converter is optimally used;
• wherein adjustment of the digitally adjustable input potentiometer is effected during a zero crossing of an acoustic useful signal.

A method of controlling a digital wireless audio transmission system;

• wherein the digital wireless audio transmission system has:
• a wireless transmitter;
• and
• a wireless receiver;
• wherein the wireless transmitter has:
• an analog input;
• a digitally adjustable input potentiometer configured to adjust the input gain;
• an analog/digital converter configured to convert the analog signals into digital signals;
• and
• a digital signal processing unit configured to perform digital signal processing;
• and
• wherein the method comprises the steps:
• adjusting a gain of the digital input potentiometer so that a dynamic range of the analog/digital converter is optimally used;
• wherein, by virtue of an abrupt severe rise in amplitude of an acoustic useful signal, a fresh adjustment of the digitally adjustable input potentiometer is very rapidly effected to prevent overdriving;
• and
• wherein the very rapid actuation of the digitally adjustable input potentiometer is effected by an interrupt routine of the internal digital processing unit or an additional hardware specifically adapted thereto, in particular a peak detector which reacts to positive and negative peaks.

A digital wireless transmitter comprising:

• an analog input amplifier;
• a digitally adjustable input potentiometer receiving a signal from the analog input amplifier and being configured to adjust an input gain;
• an analog/digital converter configured to convert an analog output signal of the digitally adjustable input potentiometer into a digital signal, wherein the analog/digital converter uses a clocked processing;
• a peak detector configured to monitor the analog output signal of the digitally adjustable input potentiometer or the analog input signal of the analog/digital converter;
• and
• a digital signal processing unit configured to perform digital processing of the digital signal provided by the analog/digital converter;
• wherein the peak detector provides a signal to an interrupt input of the digital signal processing unit when a signal peak above a threshold is detected by the peak detector, and
• wherein the digital signal processing unit, upon receiving said signal at said interrupt input, adjusts the digitally adjustable input potentiometer, independent of the clocked processing of the analog/digital converter.

A digital wireless transmitter comprising:

• an analog input amplifier;
• a digitally adjustable input potentiometer receiving a signal from the analog input amplifier and being configured to adjust an input gain;
• an analog/digital converter configured to convert an analog output signal of the digitally adjustable input potentiometer into a digital signal, wherein the analog/digital converter uses a clocked processing;
• a zero crossing detector configured to monitor the analog output signal of the digitally adjustable input potentiometer or the analog input signal of the analog/digital converter;
• and
• a digital signal processing unit configured to perform digital processing of the digital signal provided by the analog/digital converter;
• wherein the zero crossing detector provides a signal to an interrupt input of the digital signal processing unit when a change of a sign of the monitored signal is detected by the zero crossing detector, and
• wherein the digital signal processing unit, upon receiving said signal at said interrupt input, adjusts the digitally adjustable input potentiometer, independent of the clocked processing of the analog/digital converter.