Due to the decoding dependency of MPEG coded frames

now existing methods on VCR implementation have to face the problem of how to settle the transmission of extra frames caused by this decoding dependency which would brought in heavy resource consumption and high STB decoding complexity. To tackle the problem

based on GOP (Group-of-Pictures) fetching and variable frame rate (VFR)

our VCRimplementation method called G-VFR is proposed. GOP based frame-fetching can effectively eliminate the dependency transmission

and VFR leads to optional transmission rate. The experimentation results demonstrate that G-VFR can reduce the transmission rate of fast-scan operations to 22% of that of normal playback

and the VFR character can be achieved by parameter adjusting

meanwhile G-VFR can be used in real-time streaming system such as Time-Shifted TV.