Abrégé

A method and apparatus for remote watermarking of a media program is disclosed. The method inserts a pattern of substituted second versions of media program portions that are invisible to the viewer, into reproduced copies of the media program. The method permits the watermarking of encrypted media programs.

Classes IPC  ?

• G06T 1/00 - Traitement de données d'image, d'application générale

Abrégé

Method and apparatus for implementing LDPC codes in an IEEE 802.11 standard system configured to operate in a Multiple-Input, Multiple-Output (MIMO) schema. A method in accordance with the present invention comprises defining a base LDPC code, having a length equal to an integer number of data carriers in an ODFM symbol, transmitting the base LDPC code over a plurality of sub-carriers, wherein the base code is transmitted at an expected phase on sub-carriers specified by the IEEE 802.11 standard system, and transmitting the base LDPC code on other sub-carriers than those specified by the IEEE 802.11 standard system, wherein the base LDPC code on the other sub-carriers is transmit offset in phase from the base LDPC code on the specified sub-carriers.

Classes IPC  ?

• H04L 27/26 - Systèmes utilisant des codes à fréquences multiples
• H04L 1/00 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue
• H04L 1/06 - Dispositions pour détecter ou empêcher les erreurs dans l'information reçue par réception à diversité utilisant la diversité d'espace

Abrégé

An apparatus for controlling fraud in a satellite signal delivery system. An apparatus in accordance with the present invention comprises a receive antenna for receiving at least one satellite signal, and a module, coupled to the receive antenna, for selectively delivering the at least one satellite signal to at least one receiver via an output of the module, wherein the module creates an association between the module and the at least one receiver upon installation of the at least one receiver to the output, such that the module delivers the at least one satellite signal to the at least one receiver only when the association is present.

Classes IPC  ?

• H04L 9/32 - Dispositions pour les communications secrètes ou protégées; Protocoles réseaux de sécurité comprenant des moyens pour vérifier l'identité ou l'autorisation d'un utilisateur du système
• H04N 21/441 - Acquisition de l'identification d'un utilisateur final
• H04N 7/20 - Adaptations pour la transmission sur une bande de fréquence du domaine des GHz, p.ex. par satellite

Abrégé

An approach is provided for minimizing co-channel interference in a communication system (100) is disclosed. A header (401) of a first frame is scrambled based on a first unique word (411, 413). A header (401) of a second frame is scrambled based on a second unique word (411, 413). The first frame including the corresponding scrambled header (401) and the second frame including the corresponding scrambled header (401) are transmitted, respectively, over adjacent co-channels of the communication system (100). Each of the frames further includes a payload (403) and a pilot block (405). The payload (403) and the pilot black (405) of the first frame are scrambled based on a first scrambling sequence. The payload (403) and the pilot black (405) of the second frame are scrambled based on a second scrambling sequence. The above arrangement is particularly suited to a digital satellite broadcast and interactive system (100).

Classes IPC  ?

• H04B 1/707 - Techniques d'étalement de spectre utilisant une modulation par séquence directe
• H04H 20/51 - Dispositions caractérisées par des circuits ou composants spécialement adaptés à la radiodiffusion spécialement adaptés aux systèmes de radiodiffusion couverts par les groupes spécialement adaptés aux systèmes de radiodiffusion par satellite
• H04L 27/32 - Systèmes à courant porteur caractérisés par des combinaisons de plusieurs types de systèmes couverts par les groupes , , , ou

Abrégé

Methods and apparatuses for minimizing co-channel interference in communications systems are disclosed. A method in accordance with the present invention comprises scrambling a first header of the first signal using a first scrambling code, scrambling a second header of the second signal using a second scrambling code, and transmitting the first signal and the second signal with the scrambled first header and the scrambled second header over different channels of the communication system.

Classes IPC  ?

• H04W 12/02 - Protection de la confidentialité ou de l'anonymat, p.ex. protection des informations personnellement identifiables [PII]
• H04B 1/76 - Emetteurs ou récepteurs pilotes pour la commande de la transmission ou pour l'égalisation
• H04B 7/005 - Commande de la transmission; Egalisation
• H04B 7/185 - Stations spatiales ou aériennes
• H04N 7/20 - Adaptations pour la transmission sur une bande de fréquence du domaine des GHz, p.ex. par satellite