Smart coding mode switching in audio rate adaptation

An apparatus for communicating an audio signal, comprising:

• a de-jitter buffer configured to:
• receive a first data, wherein the first data was encoded by a transmitting device based on a first coding mode, and wherein the first coding mode indicates both primary frame encoding and redundant frame encoding;
• and
• receive a second data, wherein the second data was encoded by the transmitting device based on a second coding mode;
• an analyzer, coupled to the de-jitter buffer, configured to determine whether a condition for coding mode change is satisfied;
• a transmitter configured to transmit, in response to determining that the condition is satisfied by the analyzer, a request to the transmitting device, the request indicating coding mode change to the second coding mode, wherein the second coding mode indicates primary frame encoding without redundant frame encoding;
• and
• a speech decoder, coupled to the de-jitter buffer, configured to:
• decode the first data, the first data including a partial copy of a first frame of the audio signal and a primary copy of a second frame of the audio signal;
• and
• decode the second data, the second data including a primary copy of a third frame of the audio signal.

A computer-readable storage device storing instructions that, when executed by a processor, cause the processor to perform operations comprising:

• receiving a first data at a de-jitter buffer, wherein the first data was encoded by a transmitting device based on a first coding mode, and wherein the first coding mode indicates both primary frame encoding and redundant frame encoding;
• decoding the first data, by a speech decoder, the first data including a partial copy of a first frame of an audio signal and a primary copy of a second frame of the audio signal;
• determining whether a condition for coding mode change is satisfied;
• in response to determining that the condition is satisfied, transmitting a request to the transmitting device, the request indicating coding mode change to a second coding mode, wherein the second coding mode indicates primary frame encoding without redundant frame encoding;
• receiving, a second data at the de-jitter buffer, wherein the second data was encoded by the transmitting device based on the second coding mode;
• and
• decoding the second data, by the speech decoder, the second data including a primary copy of a third frame of the audio signal.

An apparatus for communicating an audio signal, comprising:

• means for receiving a first data at a receiving device, wherein the first data was encoded by a transmitting device based on a first coding mode, and wherein the first coding mode indicates both primary frame encoding and redundant frame encoding;
• means for decoding, at the receiving device, the first data, the first data including a partial copy of a first frame of the audio signal and a primary copy of a second frame of the audio signal;
• means for determining, at the receiving device, whether a condition for coding mode change is satisfied;
• in response to determining that the condition is satisfied, means for transmitting a request to the transmitting device, the request indicating coding mode change to a second coding mode, wherein the second coding mode indicates primary frame encoding without redundant frame encoding;
• means for receiving, a second data at the receiving device, wherein the second data was encoded by the transmitting device based on the second coding mode;
• and
• means for decoding the second data, at the receiving device, the second data including a primary copy of a third frame of the audio signal.