SYSTEM AND METHOD FOR ENCODING AN AUDIO SIGNAL, BY ADDING AN INAUDIBLE CODE TO THE AUDIO SIGNAL, FOR USE IN BROADCAST PROGRAMME IDENTIFICATION SYSTEMS

摘要

An apparatus for encoding a signal with a code is described. The signal has a video portion and an audio portion. The encoding arrangement comprises an encoder to encode one of the portions of the signal and a compensator to compensate for any relative delay between the video portion and the audio portion caused by the encoder.