Multi-channel audio signal converting device using time-varying digital filter, electronic system including the same, and method of converting multi-channel audio signal

A multi-channel audio signal converting device comprising:

• a first signal channel configured to perform at least one of analog-to-digital conversion and digital-to-analog conversion of a first audio signal using a first clock signal;
• a first time-varying filter configured to synchronize a second, digital audio signal synchronized with a second clock signal different from the first clock signal with the first clock signal by resampling the digital audio signal in synchronization with the first clock signal and to output the resampled digital audio signal;
• and
• a second signal channel configured to receive the resampled digital audio signal from the first time-varying filter and perform digital-to-analog conversion of the resampled digital audio signal using the first clock signal.

A method of converting, an audio signal, the methods comprising:

• performing at least one of analog-to-digital conversion and digital-to-analog conversion of a first audio signal using a first clock signal in a first signal channel;
• performing analog-to-digital conversion of a second audio signal using the first clock signal in a second signal channel;
• and synchronizing an output signal of the second signal channel with the second clock signal different from the first clock signal,
• wherein the performing the conversion comprises converting an analog audio signal into a digital audio signal using the second signal channel comprising an analog-to-digital converter, and
• wherein the synchronizing comprises:
• inputting the first clock signal and the second clock signal to a first time-varying filter;
• and
• the first time-varying filter synchronizing the digital audio signal, which has been synchronized with the first clock signal, with the second clock signal.