Receiving audio/video content

摘要

An audio/video content receiver being configured to receive media content from a content source by a broadcast data path, the media content being arranged as a plurality of media channels comprises a host module having a tuner configured to assign logical channel indices to the media channels to allow selection, at the host module, of one or more of the media channels for reproduction by selecting the corresponding logical channel index, the host module storing channel association data associating the logical channel indices with the received media channels; and a removable conditional access module (CAM), the CAM having an access control unit for decoding access-controlled encoded broadcast content, the host module and the removable CAM being arranged to provide an encrypted communication link for decoded access-controlled encoded broadcast content between the CAM and the host module; in which: the host module is configured to acquire channel association data via the broadcast data path; the CAM is configured to provide further channel association data to the host module; the host module comprises a detector configured to detect a conflict of logical channel index between the channel association data acquired by the host from the broadcast data path and the channel association data provided by the CAM and, in the case of a conflict, to detect one or more unused logical channel indices; and the CAM is configured to select one of the unused logical channel indices for use by a media channel for which the logical channel index defined in the CAM's channel association data conflicts with a logical channel index defined in the host's channel association data.

主权项

1. An audio/video content receiver being configured to receive media content from a content source by a broadcast data path, the media content being arranged as a plurality of media channels, the content receiver comprising:
host circuitry having a tuner configured to assign logical channel indices to the media channels to allow selection, at the host circuitry, of one or more of the media channels for reproduction by selecting the corresponding logical channel index, the host circuitry storing channel association data associating the logical channel indices with the received media channels; and a removable conditional access circuitry configured to decode access-controlled encoded broadcast content, the host circuitry and the removable conditional access circuitry being arranged to provide an encrypted communication link for decoded access-controlled encoded broadcast content between the removable conditional access circuitry and the host circuitry, wherein; the host circuitry is configured to acquire channel association data via the broadcast data path; the removable conditional access circuitry is configured to provide further channel association data to the host circuitry; the host circuitry comprises a detector configured to detect a conflict of logical channel index between the channel association data acquired by the host from the broadcast data path and the channel association data provided by the removable conditional access circuitry and, in the case of a conflict, to detect one or more unused logical channel indices for offering to the removable conditional access circuitry; and the removable conditional access circuitry is configured to do one of; select one of the unused logical channel indices for use by a media channel for which the logical channel index defined in the removable conditional access circuitry's channel association data conflicts with a logical channel index defined in the host circuitry's channel association data; or the removable conditional access circuitry responds with a request to the host circuitry for a different logical channel index to be offered; or the removable conditional access circuitry sets a different logical channel index for use by a media channel for which the logical channel index defined in the removable conditional access circuitry's channel association data conflicts with a logical channel index defined in the host circuitry's channel association data.