Audio-video multi-participant conference systems using PSTN and internet networks

摘要

A multi-participant conference system and method is described. The multi-participant system includes a PSTN client, at least one remote client and a first participant client. The PSTN client communicates audio data and the remote clients communicate audio-video data. The first participant client includes a voice over IP (VoIP) encoder, a VoIP decoder, a first audio mixer, and a second audio mixer. The VoIP encoder compresses audio data transported to the PSTN client. The VoIP decoder then decodes audio data from the PSTN client. The first audio mixer mixes the decoded audio data from the PSTN client with the audio-video data from the first participant into a first mixed audio-video data stream transmitted to the remote client. The second audio mixer mixes the audio-video data stream from the first participant with the audio-video data stream from each remote client into a second mixed audio transmitted to the PSTN client.

主权项

1. A multi-participant conference system comprising:
a public switched telephone network (PSTN) client that communicates audio data; at least one remote client connected to the Internet that receives audio-video data; a first participant client that receives audio-video data, wherein the first participant client includes,
a voice over IP encoder that compresses audio data transported to the PSTN client,a voice over IP decoder that decodes audio data from the PSTN client,a first audio mixer that mixes the decoded audio data from the PSTN client with the audio-video data from the first participant into a first mixed audio-video data stream, wherein the first mixed audio-video data stream is transmitted to the at least one remote client communicatively coupled to the Internet;a second audio mixer that mixes the audio-video data stream from the first participant with the audio-video data stream from the at least one remote client communicatively coupled to the Internet into a second mixed audio, wherein the second mixed audio is compressed by the voice over IP encoder, which is then transmitted to the PSTN client.