Video server for video-on-demand system with controllable memories and with pause, fast-forward and rewind functions
Video server Patent #: 5610841
ApplicationNo. 715870 filed on 09/19/1996
US Classes:725/90, With particular transmission scheme (e.g., transmitting I-frames only)725/91Server or headend
ExaminersPrimary: Peng, John K.
Assistant: Flynn, Nathan J.
Attorney, Agent or Firm
International ClassH04N 007/173
Foreign Application Priority Data1995-12-01 JP
AbstractA video server apparatus is provided with a stream control section which determines a keyframe readout interval and a keyframe playback interval that satisfy a playback speed designated by a terminal apparatus. The video server apparatus transmits data of the thus-determined keyframe playback interval to the terminal apparatus. The video server apparatus reads out keyframes of a stored bit stream from at the thus-determined keyframe readout interval, and transmits a stream including the read-out keyframes to the terminal apparatus. The terminal apparatus decodes and displays the transmitted stream at the received keyframe playback interval. This system can correctly perform a playback at an arbitrary speed that is designated by the terminal apparatus.
Field of SearchLinear