Audio device for reducing pop noise and processing method thereof

An audio device for reducing pop noise, adapted to compensate for a direct current (DC) offset value of an audio source signal and output the audio source signal to an audio playing device, the audio device comprising:

• a linear operation circuit for generating the DC offset value based on a linear equation, a temperature parameter, a slope parameter, and a constant, wherein the linear equation is:
• Y=M*X+C
• wherein Y is the DC offset value, X is the temperature parameter, M is the slope parameter, and C is the constant;
• an adder for processing an input signal and the DC offset value to generate a calibration signal;
• a digital-to-analog circuit coupled to the adder, the digital-to-analog circuit being configured to convert a calibration signal in a digital form to a calibration signal in an analog form;
• an amplification circuit coupled to the digital-to-analog circuit, the amplification circuit being configured to process the calibration signal in the analog form to output the audio source signal;
• a temperature sensing circuit coupled to the linear operation circuit, the temperature sensing circuit generating the temperature parameter based on a temperature of the audio device and outputting the temperature parameter to the linear operation circuit;
• a storage device coupled to the linear operation circuit, the storage device being configured to store the slope parameter and the constant and output the slope parameter and the constant to the linear operation circuit;
• an analog-to-digital circuit coupled to the amplification circuit, the analog-to-digital circuit being configured to sense an uncompensated DC offset value of the audio source signal;
• and
• a control circuit coupled between the analog-to-digital circuit and the storage device, the control circuit adjusting the slope parameter and the constant based on the uncompensated DC offset value of the audio source signal and outputting the slope parameter and the constant to the storage device.

An audio processing method for reducing pop noise, adapted to compensate for a direct current (DC) offset value of an audio source signal, the audio processing method comprising:

• obtaining a slope parameter and a constant;
• generating a temperature parameter based on a temperature of an audio device;
• generating the DC offset value based on a linear equation, the temperature parameter, the slope parameter, and the constant, wherein the linear equation is:
• Y=M*X+C
• wherein Y is the DC offset value, X is the temperature parameter, M is the slope parameter, and C is the constant;
• processing an input signal and the DC offset value to generate a calibration signal;
• converting the calibration signal in a digital form to the calibration signal in an analog form;
• processing the calibration signal in the analog form to output the audio source signal;
• and
• using a switch to control an output of the audio device, wherein when the switch is closed, the audio device outputs the audio source signal, and when the switch is opened, the audio device does not output the audio source signal.

An audio processing method for reducing pop noise, adapted to compensate for a direct current (DC) offset value of an audio source signal, the audio processing method comprising:

• obtaining a slope parameter and a constant;
• generating a temperature parameter based on a temperature of an audio device;
• generating the DC offset value based on a linear equation, the temperature parameter, the slope parameter, and the constant, wherein the linear equation is:
• Y=M*X+C
• wherein Y is the DC offset value, X is the temperature parameter, M is the slope parameter, and C is the constant;
• processing an input signal and the DC offset value to generate a calibration signal;
• converting the calibration signal in a digital form to the calibration signal in an analog form;
• processing the calibration signal in the analog form to output the audio source signal;
• sensing an uncompensated DC offset value of the audio source signal;
• and
• adjusting the slope parameter and the constant based on the uncompensated DC offset value of the audio source signal.