Patent ID: 9191516
Filing Date: 2015-11-17
Classification: G10L,H04M

Abstract:
1. A method comprising: generating, based at least in part on a first audio data stream and a second audio data stream, a mixed audio data stream, the first audio data stream representing sound associated with a first terminal device participating in a teleconference, the second audio data stream representing sound associated with a second terminal device participating in the teleconference; generating a first sub-stream that is a lower-quality monaural representation of the first audio data stream, wherein generating the first sub-stream comprises using a vocoder to perform data compression on the first sub-stream; generating a second sub-stream that is a lower-quality monaural representation of the second audio data stream, wherein generating the second sub-stream comprises using the vocoder to perform data compression on the second sub-stream; generating a modified mixed audio data stream at least in part by steganographically embedding into the mixed audio data stream the first sub-stream and the second sub-stream such that the modified mixed audio data stream supports both mono audio playback and stereo audio playback; and outputting the modified mono audio data stream to a third terminal device participating in the teleconference.