CEA-766-B-2006 U.S. and Canadian Rating Region Tables (RRT) and Content Advisory Descriptors for Transport of Content Advisory Information Using ATSC Program and System Information Protocol (PSIP)
CEA-766-B augments ATSC A/65C and designates the RRT which provides the receiver with the definition
of the rating system and the Content Advisory Descriptors which provide the receiver with the specific
program rating for each program. Specifically, CEA-766-B specifies the exact syntax to be used to define the
U.S. and Canadian Rating Region Tables (RRT) in accordance with ATSC A/65C Section 6.4, as well as the
exact syntax to be used in the Content Advisory Descriptors that convey the rating information for each
program in accordance with ATSC A/65C Section 6.9.3. Thus DTV receivers may block unwanted programs
as determined by the user.