Time scaling of audio frames to adapt audio processing to communications network timing

A communication device, comprising an audio processing circuit configured to time scale audio data frames, a modem processing circuit configured to process corresponding communications frames, and an audio output, wherein the audio processing circuit is configured to:

• determine that a completion time for processing a first audio data frame falls outside a pre-determined timing window having a beginning time (tlow) and an ending time (thigh) and prior to a time when the first audio data frame is required by one of the modem processing circuit and the audio output;
• and
• if the completion time is earlier than the beginning time (tlow) of the pre-determined timing window, synchronize the audio processing circuit with the modem processing circuit by further configuring the audio processing circuit to:
• determine an adjustment time, wherein the adjustment time is:
• (difference−(thigh−tlow/2)), and
• the difference is a start time of the modem processing circuit minus a completion time of the audio processing circuit;
• determine a number of audio samples to collect from one or more subsequent audio data frames, wherein the number of audio samples corresponds to a product of the adjustment time and a sampling rate of the audio samples;
• compress the one or more subsequent audio data frames to collect the number of audio samples;
• output the one or more compressed audio data frames;
• and
• wherein after compressing the one or more subsequent audio data frames, a completion time for processing a further subsequent audio data frame falls in the pre-determined timing window.

A circuit operative in a communication device, the circuit comprising an audio processing circuit configured to:

• determine that a completion time for processing of a first audio data frame falls outside a pre-determined timing window having a beginning time (tlow) and an ending time (thigh) and prior to a time when the first audio data frame is required by one of a modem processing circuit and an audio output;
• synchronize the audio processing circuit with the modem processing circuit by further configuring the audio processing circuit to:
• determine an adjustment time, wherein the adjustment time is:
• (difference−(thigh−tlow/2)), and
• the difference is a start time of the modem processing circuit minus a completion time of the audio processing circuit;
• determine a number of audio samples to collect from one or more subsequent audio data frames, wherein the number of audio samples corresponds to a product of the adjustment time and a sampling rate of the audio samples;
• compress the one or more subsequent audio data frames to collect the number of audio samples;
• output the one or more compressed audio data frames;
• and
• wherein after compressing the one or more subsequent audio data frames, a completion time for processing a further subsequent audio data frame falls in the pre-determined timing window.