| 摘要 |
A television receiver system, comprising: a television receiver operable to receive broadcast video signals; a memory storing a communication client application; a processor, coupled to the memory and operable to execute the communication client application, wherein the communication client application is programmed so as when executed to allow a user to establish a video call with one or more other users via a packet-based communication network; a video buffer operable to buffer video data for display on a television screen; and selection means having a first input arranged to receive broadcast video data from the television receiver, a second input arranged to receive video call data from the communication client, an output connected to the video buffer, and a control input connected to the communication client, wherein the selection means is arranged to output the broadcast video data to the video buffer in the absence of a selection signal at the control input, and wherein the communication client is arranged to generate a selection signal to control the selection means to output the video call data to the video buffer responsive to receiving a command to establish a video call from the user.
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