Abstract: The present invention is directed to playing an alternative pre-stored content in place of a particular type of content received by the player within a transport stream comprising a plurality of types of content. The invention can be useful in providing targeted advertising, where, when combined with profiling techniques, alternative content of interest to a viewer can be substituted in the transport stream in place of the received content. According to other embodiments of the present invention, computing resources and communication bandwidth use can be saved by playing pre-stored content instead of the received content. Embodiments of the present invention provide for the maintenance of the pre-stored material by storing appropriate content as it is received in the transport stream or by deleting pre-stored content when deemed appropriate to do so. An embodiment of the present invention may be deployed in a personal video player/recorder.

Abstract: Method and system to prevent control words sharing. The system comprises a receiver capable of processing a digital data stream. The receiver, having a video descrambler device, is coupled to a primary and secondary secure device. The digital data stream comprises video content data scrambled by a first algorithm using a control word, audio content data encrypted with a secret second algorithm using a system key, and encrypted control messages comprising the control word. The primary secure device decrypts the control message and obtains the control word. The video descrambler device uses this control word to descramble the video content data. The secondary secure device comprises a decryption device which decrypts the encrypted audio content data and a watermarking module configured to add a watermark to the decrypted audio content data and return watermarked decrypted audio content data to the receiver.

Abstract: Method and system to prevent control words sharing. The system comprises a receiver capable of processing a digital data stream. The receiver, having a video descrambler device, is coupled to a primary and secondary secure device. The digital data stream comprises video content data scrambled by a first algorithm using a control word, audio content data encrypted with a secret second algorithm using a system key, and encrypted control messages comprising the control word. The primary secure device decrypts the control message and obtains the control word. The video descrambler device uses this control word to descramble the video content data. The secondary secure device comprises a decryption device which decrypts the encrypted audio content data and a watermarking module configured to add a watermark to the decrypted audio content data and return watermarked decrypted audio content data to the receiver.

Abstract: The present invention is directed to playing an alternative pre-stored content in place of a particular type of content received by the player within a transport stream comprising a plurality of types of content. The invention can be useful in providing targeted advertising, where, when combined with profiling techniques, alternative content of interest to a viewer can be substituted in the transport stream in place of the received content. According to other embodiments of the present invention, computing resources and communication bandwidth use can be saved by playing pre-stored content instead of the received content. Embodiments of the present invention provide for the maintenance of the pre-stored material by storing appropriate content as it is received in the transport stream or by deleting pre-stored content when deemed appropriate to do so. An embodiment of the present invention may be deployed in a personal video player/recorder.

Abstract: A method is described for authenticating the presence of a viewer during the presentation of video content, usually commercial content, by encouraging their interaction during the broadcast of said commercial content and verifying the result of their interaction against an expected result. The method uses a receiver/decoder module associated with a security module for receiving coded messages, displaying a unique piece of information soliciting the viewer's interaction, verifying the validity of the viewer's interaction and recording the result of the authentication.