INTERACTIVE AUDIO/VIDEO BROADCAST SYSTEM, METHOD FOR OPERATING THE SAME AND USER DEVICE FOR OPERATION IN THE INTERACTIVE AUDIO/VIDEO BROADCAST SYSTEM

摘要

An audio/video broadcast system, a method for operating the same and a user device for operation in the interactive broadcast system. The broadcast system comprises an capture unit, an editing unit and a user device. A plurality of video streams is captured by the capture unit, a main signal A is broadcast via a broadcast channel to the plurality of user devices. A user request S is transmitted from the user device to the editing unit and is indicative to information about a topic for an edited replay clip. After processing of content at the editing unit so as to generate the edited replay clip in response to the user request, said reply clip is broadcast using free bandwidth of the broadcast channel. A copy of the replay clip is cached at the user device and reproduced upon reception of a user command.

主权项

1. A method of providing on-demand supplementary audio-visual content over a first broadcast channel for storing in a cache of a user device, the first broadcast channel having a predetermined limited bandwidth, the supplementary audio-visual content relating to main audio-visual content, the main audio-visual content having a variable data rate, the method including:
broadcasting, to a plurality of user devices, said main audio-visual content over said first broadcast channel; receiving a request for said supplementary audio-visual content; preparing, in response to the request, said supplementary audio-visual content for broadcast; and broadcasting, along with said main audio-visual content and using unused bandwidth of said first broadcast channel, said supplementary audio-visual content, wherein the main audio-visual content remains unaffected.