公开(公告)号：WO9515047A3

公开(公告)日：1995-08-03

申请号：PCT/US9413553

申请日：1994-11-21

Applicant: INTEL CORP

Inventor： TUNG PETER ,  GUTMANN MICHAEL ,  VRVILO BENJAMIN

IPC: H04L12/18 ,  H04M3/56 ,  H04N7/15 ,  H04Q11/04

CPC classification number: H04N21/4143 ,  H04L12/1813 ,  H04M3/567 ,  H04M2201/22 ,  H04N7/15 ,  H04Q11/0428

Abstract: An audio task resides on an audio/communications board (206) of the computer conferencing system (106). An audio manager (520) and an audio applications programming interface (512) reside on a host processor (202) of the computer conferencing system (100). The audio task (538) receives local analog audio signals, generates local compressed audio signals corresponding to the local analog audio signals, and passes the local compressed audio signals to a communications subsystem of the computer conferencing system for transmission over a communications link (110) to a remote computer conferencing system (100). The audio task (538) receives remote compressed audio signals from the communications subsystem and generates remote decompressed audio signals corresponding to the remote compressed audio signal for local playback. A video microcode (530) resides on a video board (204) of the computer conferencing system. In addition, a video capture driver (522), a video manager (516), and a video applications programming interface (508) reside on a general-purpose host processor (207) of the computer conferencing system. The video microcode (530) receives local analog video signals, generates local compressed video signals corresponding to the local analog video signals, and passes the local compressed video signals to the video capture driver (522). The video capture driver (522) controls the operations of the video microcode (530) and passes the local compressed video signals to the video manager (516). The video manager (516) passes the local compressed video signals to a communications subsystem of the computer conferencing system for transmission over a communications link (110) to a remote computer conferencing system (100). The video manager (516) receives remote compressed video signals from the communications subsystem and passes the compressed video signals to the video capture driver (522), the communications subsystem having received the remote compressed video signals over the communications link (110) from the remote computer conferencing system. The video capture driver (522) generates remote decompressed video signals corresponding to the remote compressed video signal for local playback.