| 摘要 |
In an audio/video transmission system, a method of forming program guide information conducive to selective display at respective receivers includes arranging program guide information in different data blocks according to types of guide information. One such data block contains channel information (CSSMi) describing the respective channels. Respective CSSMi in this block include a channel information customer service system byte (CI-CSS) which contains conditional access information related to a channel associated with a CSSMi. In a receiver embodiment, a subscriber specific byte (CA-CSS) is stored (14) and accessible to program guide processing apparatus (8). Prior to displaying received program guide information for a particular channel, the subscriber byte CA-CSS is compared (17, 22) with the channel information byte CI-CSS in the program guide. Dependent upon the results of the comparison, the guide data for that particular channel is either displayed (19) or not displayed in the program guide.
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