Apparatus for, and method of, encoding a signal

Details Apparatus for, and method of, encoding a signal Apparatus for, and method of, encoding a signal

H - Electricity

04

B

H04B 1/66 (2006.01) H04H 1/00 (2006.01)

Patent

CA 2345963

There is provided an apparatus and method for encoding a code signal particularly into an audio signal. Previously as a result of data compression protocol codes hidden into "sync periods" have been degraded or lost as a result of, for example, low pass filtering. Sometimes, during quiet intervals codes were audible. The invention overcomes the problem of encoding a code into an audio signal by sampling the audio signal in order to determine its energy content and embedding the code into a suitable portion of the audio signal so that the code is hidden within a sufficiently energetic portion of audio signal. The advantage is that code is never audible.

L'invention se rapporte à un appareil et à un procédé permettant de décoder un signal, notamment un signal sonore. Jusqu'à présent, en raison du protocole utilisé pour la compression des données, les codes cachés à l'intérieur des "périodes de synchronisation" ont été dégradés ou perdus à cause, par exemple, du filtrage passe-bas. Parfois, les codes étaient audibles pendant des intervalles de silence. La présente invention propose une solution pour le codage d'un code en signal sonore, qui consiste à échantillonner le signal sonore de manière à déterminer son contenu énergétique et à inclure le code dans une partie appropriée du signal audio de sorte que le code soit caché à l'intérieur d'une partie suffisamment énergétique du signal sonore. L'avantage est que le code n'est jamais audible.

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