Adaptive exponential moving average filter

A system comprising:

• data processing hardware;
• and
• memory hardware in communication with the data processing hardware, the memory hardware storing instructions that when executed on the data processing hardware cause the data processing hardware to perform operations comprising:
• establishing digital communication between a first user device and a second user device using a first codec;
• filtering an input signal indicating an estimated unfiltered available bandwidth for the digital communication by applying a current filter comprising one of:
• a first filter to filter the input signal when the estimated unfiltered available bandwidth is less than a first threshold value or greater than a second threshold value;
• or
• a second filter to filter the input signal when the estimated unfiltered available bandwidth is between and including the first threshold value and the second threshold value;
• adaptively switching the current filter applied to filter the input signal between the first filter and the second filter as a function of the filtered input signal, the first threshold value, and the second threshold value;
• determining whether the filtered input signal satisfies a channel bandwidth threshold;
• and
• when the filtered input signal satisfies the channel bandwidth threshold for at least a predetermined period of time, switching from using the first codec to using a second codec for the digital communication between the first user device and the second user device.