Atsc working Draft Template
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carrier_frequency
– These 32 bits shall be set to zero. 32 ATSC A/65:2013 Program and System Information Protocol 7 August 2013 Note: The receiver is expected to record the TSID value as indicated in the PAT of each digital Transport Stream and make note of the frequency used to tune it. In the case of an analog waveform, the analog TSID value carried in the VBI is recorded. The value of channel_TSID given in the VCT is matched against TSID values to form the association between PSIP data and transmitted content. channel_TSID – A 16-bit unsigned integer field in the range 0x0000 to 0xFFFF that represents the MPEG-2 Transport Stream ID associated with the Transport Stream carrying the MPEG-2 program referenced by this virtual channel 9 . For inactive channels, channel_TSID shall represent the ID of the Transport Stream that will carry the service when it becomes active. The receiver is expected to use the channel_TSID to verify that any received Transport Stream is actually the desired multiplex. For analog channels ( service_type 0x01), channel_TSID shall indicate the value of the analog TSID included in the VBI of the NTSC signal. Refer to Annex D, Section D.10 for a discussion on use of the analog TSID. program_number – A 16-bit unsigned integer number that associates the virtual channel being defined here with the MPEG-2 PROGRAM ASSOCIATION and TS PROGRAM MAP tables. For virtual channels representing analog services, a value of 0xFFFF shall be specified for program_number . For inactive channels (those not currently present in the Transport Stream), program_number shall be set to zero. A zero value for program_number in the VCT shall not indicate a Network Information Table or a Program Map Table with program_number equal to zero is present. Download 4.82 Kb. Do'stlaringiz bilan baham: |
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