Patent ID: 8249865

Claim:
A memory device encoded with instructions that, if executed, result in: processing a received digital bitstream using a particular modulation parameter set to generate an audio signal that has different audio tones for different bit values, wherein the audio tones are selected to pass through a wireless voice channel of a wireless telecommunication network unobstructed by a vocoder, wherein the particular modulation parameter set is optimized for a subset of a plurality of vocoding modes without a priori knowledge of which one of the plurality of vocoding modes is currently operated by the vocoder for vocoding the audio signal; transmitting the generated audio signal over the wireless voice channel of the wireless telecommunications network; determining whether an amount of errors associated with the transmission over the wireless voice channel reaches a preset threshold according to error detecting performed by a receiver; and switching from the particular modulation parameter set to a different modulation parameter set in response to determining that the amount of errors associated with the transmission over the wireless voice channel reached the preset threshold.