What must an analog television receiver do to ensure content advisory data functions after decoding?

To ensure content advisory data functions effectively after decoding, an analog television receiver must decode the information from the Vertical Blanking Interval (VBI) and compare it to the V-chip settings. The V-chip is a technology implemented in many televisions that allows parents to control and restrict the viewing of content based on its rating. By decoding this data, the receiver can determine the content advisory ratings embedded in the broadcast signal.

The process involves the receiver extracting the advisory data that has been sent through the VBI, which is a dedicated part of the broadcast signal, and then matching this data against the V-chip settings preconfigured by the user. If the content's ratings exceed what has been set on the V-chip, the television can restrict or block the display of that content accordingly.

This functionality is essential for maintaining the intended use of content advisory ratings, allowing parents to monitor and manage what their children are watching based on specified ratings. The integration of the content rating with the user-defined settings empowers viewers to have control over their television viewing experience.