Video telecommunications server and method of providing video fast forward and reverse

摘要

A video telecommunication server for use in providing a fast scan of a video telecommunication comprises a bitstream store for receiving and storing a coded input video telecommunication digital bitstream. The server further comprises a video decoder for decoding the received digital video bitstream and, in one embodiment, a representation of every nth frame of said decoded digital video signal is stored in a frame store depending on a desired speed-up rate, where n is greater than one. A video encoder reencodes the stored video telecommunication predictively such that every nth frame is predicted based on the preceding frame. A fast scan digital video bitstream is generated for output by the video encoder that represents the fast scan video telecommunication, either in a fast forward or fast reverse direction. A receiver for receiving a control input may receive data representing the direction of fast scan and the speed-up rate. In further embodiments, the video encoder comprises an intra frame encoder or provides for requesting intra frames from a transmitting video encoder at periodic intervals.