Patent ID: 8471891

Claim:
A video switching system operable to switch video images of a plurality of participants in a video conference, the video switching system comprising: a storage system; at least one processor; one or more programs that are stored in the storage system and are executed by the at least one processor, the one or more programs comprising: a detecting module operable to detect speaking information of at least one speaker in the video conference according to a reference time, wherein one participant is regarded as one speaker if the one participant speaks longer than the reference time; a main speaker determining module operable to determine a main speaker of the at least one speaker according to the speaking information of the at least one speaker; a calculating module operable to calculate an image switching frequency of the video conference, wherein the image switching frequency is a number of times that the video images of the video conference have been switched per unit time; a switching module operable to determine whether to switch to a video image of the main speaker according to the image switching frequency, wherein the calculating module further calculates a response time when the switching module determines to switch to the video image of the main speaker, where the response time is a time difference between a time point of the main speaker starting to speak and a time point of the switching module determining to switch to the video image of the main speaker; an adjusting module operable to adjust the reference time according to the image switching frequency and the response time; wherein the adjusting module increases the reference time by a value of a sensitivity adjusting unit * the image switching frequency / a switching standard value when the image switching frequency is greater than the switching standard value, and decreases the reference time by the value of the sensitivity adjusting unit * the response time / a response standard value when the response time is greater than the response standard value.