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Table 6.30 Selected Stream Type Assignments (Informative)  stream_type Description


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Table 6.30 Selected Stream Type Assignments (Informative) 
stream_type Description 
0x02 
ITU-T Rec. H.262 | ISO/IEC 13818-2 Video [14] or ISO/IEC 11172-2 [25] constrained parameter 
video stream 
0x06 
PES packets containing A/90 streaming, synchronized data 
0x0B 
DSM-CC sections containing A/90 asynchronous data 
0x0D 
DSM-CC addressable sections per A/90 
0x14 
DSM-CC sections containing non-streaming, synchronized data per A/90 
0x81 
Audio per ATSC A/53 Part 5 [18] 
0x95 
Sections conveying A/90 [20] Data Service Table, Network Resources Table 
0xC2 
PES packets containing A/90 [20] streaming, synchronous data 
elementary_PID
– PID for the elementary stream. The value for 
elementary_PID

stream_type
, and the 
associated ISO 639 [10] language code shall be the same as those delivered in an 
ES_info
loop 
of the 
TS_program_map_section() 
currently being transmitted. 
ISO_639_language_code
– This 3-byte (24 bits) field, in conformance with ISO 639.2/B [10], 
specifies the language used for the elementary stream. In case of no language specified for this 
elementary stream; e.g. video, each byte shall have the value 0x00. The value of the 
ISO_639_language_code
field in the 
service_location_descriptor()
shall be the same as the value in the 
corresponding 
ES_info
loop of the 
TS_program_map_section() 
currently being transmitted. If neither 
an 
ISO_639_language_descriptor()
nor an 
AC-3_audio_stream_descriptor()
containing a 3-byte 
language
field is present in the 
ES_info
loop for this Elementary Stream in the currently transmitted 
TS_program_map_section()
, each byte of the 
ISO_639_language_code
field shall be zero. 
6.9.6 
Time-Shifted Service Descriptor 
This descriptor links one virtual channel with one or more virtual channels that carry the same 
programming on a time-shifted basis. The typical application is for Near Video On Demand 
(NVOD) services. The 
time_shifted_service_descriptor()
shall be used only in the case that the time shift 
is constant across the time period covered by all EITs. 
The base channel of a set of NVOD channels is the sole channel in that set that carries a 
time_shifted_service_descriptor()
within its VCT entry. An NVOD base channel’s EIT subtables shall 
be the same as that of a normal channel, except that EIT-0, in addition to its normal entries, shall 
list all events that have expired in the base channel’s schedule until they have expired in all its 
child channels. NVOD child services derive their EIT information from that of the base channel 
by applying the 
time_shift
specified in the base channels’ 
time_shifted_service_descriptor()
. ETMs for 
events expired in the base channel shall be carried on the PID listed for ETT-0 until they are no 
longer referenced by EIT-0. 
Two example scenarios can be found in informative Annex D. 
The bit stream syntax for the 
time_shifted_service_descriptor()
shall be as shown in Table 6.31. 
73 


ATSC A/65:2013 
Program and System Information Protocol 
7 August 2013 

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