A transcoder for the conversion of video signals between a first and a second coding scheme employing motion compensation comprises a decoder (28) for decoding a received data stream encoded according to a first coding scheme and an encoder (30) for encoding a data stream from the decoder into a data stream according to a second coding scheme. The decoder (28) extracts motion vectors from the received data stream and passes them (42) to the data stream of the encoder, so avoiding the recalculation of the motion vectors. Drift compensation means (52-64; 70-78) may be provided to compensate for any resulting drift after a picture frame.
申请公布号
DE69515997(T2)
申请公布日期
2000.11.02
申请号
DE1995615997T
申请日期
1995.04.21
申请人
BRITISH TELECOMMUNICATIONS P.L.C., LONDON
发明人
NILSSON, ERLING;MORRISON, GEOFFREY;GHANBARI, MOHAMMED