Verfahren und Apparat für die Übertragung von Videosignalen

摘要

A method and an apparatus for transmitting and recovering a video signal are provided. The method for transmitting a video signal that has a hierarchical structure of a frame, groups of blocks (GOBs), and macro blocks includes a transmitter inserting a plurality of resynchronization markers into each GOB to prevent the propagation of errors generated in a transmission channel. The insertion of the resynchronization markers includes assigning the number of resynchronization markers to the respective GOBs and inserting the assigned resynchronization markers into predetermined positions of the corresponding GOB. The positions are determined to minimize the mean error propagation cost based on whether respective macro blocks positioned between the resynchronization markers to be inserted are skipped.The present invention make it possible to prevent the propagation of an error when a video signal is transmitted over an error prone mobile network or radio network.