TELECONFERENCING USING STEGANOGRAPHICALLY-EMBEDDED AUDIO DATA

摘要

A multi-party control unit (MCU) generates, based on audio data streams that represent sounds associated terminal devices, a mixed audio data stream. In addition, the MCU modifies the mixed mono audio data to steganographically embed sub-streams that include representations of the mono audio data streams. A terminal device receives the modified mixed audio data stream. When the terminal device is configured for stereo playback, the terminal device performs an inverse steganographic process to extract, from the mixed audio data stream, the sub-streams. The terminal device generates and outputs multi-channel audio data based on the extracted sub-streams and the mixed audio data stream. When the terminal device is not configured for stereo playback, the terminal device outputs sound based on the mixed audio data stream without extracting the embedded sub-streams.

主权项

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 modified mixed audio data stream at least in part by steganographically embedding into the mixed audio data stream a first sub-stream and a second sub-stream such that the modified mixed audio data stream supports both mono audio playback and stereo audio playback, the first sub-stream including a representation of the sound associated with the first terminal device, the second sub-stream including a representation of the sound associated with the second terminal device; and outputting the modified mono audio data stream to a third terminal device participating in the teleconference.