number_of_services [ATSC Semantics]
number_of_services is found in two differnt ATSC A/65 table sections:
The number_of_services is a 5-bit unsigned integer field in an ATSC caption service descriptor that gives the number of services listed in the descriptor.
number_of_services is a 5-bit unsigned integer field in an ATSC time-shifted services descriptor that signals the number of time-shifted services listed in the descriptor.
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