H - Electricity – 04 – N
Patent
H - Electricity
04
N
H04N 5/913 (2006.01) G06F 12/14 (2006.01) H04B 1/69 (2006.01) H04K 1/02 (2006.01) H04N 7/08 (2006.01)
Patent
CA 2227049
The PN code generation controlling means 15 produces a PN code generation clock signal PNCLK to generate the PN code of one chip to one vertical section and supplies this clock signal to an SS duplication preventing control signal generating means 16. The SS duplication preventing control signal generating means 16 generates the PN code of one chip to one vertical section depending on the PN code generation clock signal PNCLK and executes t he spectrum spread to the duplication preventing control signal S3 using this PN code to form the SS duplication preventing control signal S5. The SS duplication preventing control signal S5 is superimposed to the image signal and is then output. Thereby, elimination and deterioration of the additional information which has been spectrum spread and is then superimposed into the image signal can be prevented to surely provide the additional information superimposed to the image signal.
Le moyen 15 de commande de génération de code PN produit un signal d'horloge PNCLK de génération de code PN afin de transmettre le code PN d'un élément à une section verticale, puis achemine ce signal d'horloge à un moyen 16 de génération de signal de commande à spectre étalé empêchant une duplication, le moyen 16 transmet le code PN d'un élément à une section verticale selon le signal d'horloge PNCLK de génération de code PN et, à l'aide de ce code PN, applique l'étalement spectral au signal S3 de commande empêchant la duplication afin de former le signal S5 de commande à spectre étalé empêchant la duplication. Le signal S5 est superposé au signal d'image, puis produit en sortie. On peut ainsi empêcher l'élimination et la détérioration de l'information supplémentaire, étalée spectralement puis superposée au signal d'image, afin d'assurer la transmission sûre de l'information supplémentaire superposée au signal d'image.
Ikeda Nozomu
Ogino Akira
Gowling Lafleur Henderson Llp
Sony Corporation
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