| 摘要 |
Conference systems are used to support discussions in meeting rooms or plenary halls, whereby the conference systems usually comprise a plurality of delegate units for participants of the discussion. It is furthermore known, that conference systems comprise a display for displaying the active speaker in a conference. Especially in large conferences with a plurality of participants more than one camera is used for viewing the different active speakers to be displayed on the display. A switching apparatus for switching compressed video streams, the switching apparatus (9) comprising: at least two inputs IN1, IN2, each input being operable to receive an input video stream from a camera (7), an output OUT for outputting an output video stream, whereby the input video streams are compressed video streams, whereby each compressed video stream is represented by a sequence of groups of frames GoF, whereby each group of frames GoF comprises a key frame I and at least one inter frame X, a switching module (12) operable to receive a switch request SR and to switch the input video streams in the output video stream, so that a first video stream of the input video streams is stopped and a second video stream of the input video streams is started, whereby the output video stream is a compressed video stream. |
| 主权项 |
1. A switching apparatus for switching compressed video streams, the switching apparatus comprising:
at first input and a second input, each of the first and second inputs being operable to receive an input video stream from a camera; an output for outputting an output video stream, wherein the input video streams are compressed video streams, wherein each compressed video stream is represented by a sequence of groups of frames, wherein each group of frames includes a key frame and at least one inter frame; and a switching module operable to receive a switch request and to switch the input video streams in the output video stream, so that a first video stream of the input video streams is stopped and a second video stream of the input video streams is started, wherein the output video stream is a compressed video stream. |
