| 摘要 |
<p>A demand television system (100) comprising a broadcast encoder (250) and a storage encoder (252). The broadcast encoder encodes a real-time video frame sequence to form a broadcast bitstream and broadcasts the broadcast bitstream to a plurality of subscriber equipment (106), while simultaneously the storage encoder encodes the real-time video frame sequence to form a storage bitstream that is stored in an information server (108). The subscriber equipment decodes (510) the broadcast bitstream to display the broadcast program. At any time, the subscriber equipment may request (524) to review the information previously displayed in the broadcast bitstream. As such, the storage bitstream is transmitted (526) to the subscriber equipment. The storage bitstream facilitates standard play of the previously broadcast information as well as trick play such as fast forward and fast reverse functions.</p> |
