SMPTE
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...
The serial digital interface, SMPTE 292M [1], defines a universal
medium of interchange for uncompressed High Definition Television ...
... cameras, encoders,
VTRs, etc.). SMPTE 292M stipulates that the source data be in 10 bit
words and the total data rate be either 1.485 Gbps or 1.485/1.001
...
... IP connectivity to allow efficient
wide area delivery of SMPTE 292M content. Accordingly, this memo
defines an RTP payload format for SMPTE ...
... SMPTE 292M content. Accordingly, this memo
defines an RTP payload format for SMPTE 292M format video.
It is to be noted that SMPTE ...
... SMPTE 292M format video.
It is to be noted that SMPTE 292M streams have a constant high bit
rate and are not congestion controlled. Accordingly, use of this
...
... Overview of SMPTE 292M ...
...
A SMPTE 292M television line comprises two interleaved streams, one
containing the luminance (Y) samples, the other chrominance (CrCb)
...
... values. Since chrominance is horizontally sub-sampled (4:2:2 coding)
the lengths of the two streams match (see Figure 3 of SMPTE 292M
[1]). In addition to being the same length the streams also have
...
... active line; (3) end of active video timing reference (EAV); and (4)
digital line blanking. A SMPTE 292M line may also carry horizontal
ancillary data (H-ANC) or vertical ancillary data (V-ANC) instead of
the blanking level; Likewise, ancillary data may be transported
...
... LN0 and LN1 (Table 2), that carry the 11 bit line number for the
SMPTE 292M line. The Cyclic Redundancy Check, CRC, is also a two
...
... +------------+-----------------------+-----+---------------------+
Figure 1. The SMPTE 292M line format.
0 20 40 60 80 0 20 40
...
... significant bit.|
| P= protected bits defined in Table 2 of SMPTE 292M |
+---------------------------------------------------------+
...
... active lines and line blanking
is defined by source format documents. Currently, source video
formats transfered by SMPTE 292M include SMPTE 260M, 295M, 274M and
296M [5 ...
... is defined by source format documents. Currently, source video
formats transfered by SMPTE 292M include SMPTE 260M, 295M, 274M and
296M [5-8 ...
... 296M [5-8]. In this memo, we specify how to transfer SMPTE 292M over
RTP, irrespective of the source format.
...
...
Each SMPTE 292M data line is packetized into one or more RTP packets.
This includes all timing signals, blanking levels, active ...
... video (EAV+LN+CRC) signals MUST NOT be fragmented across packets, as
the SMPTE 292M decoder uses them to detect the start of scan lines.
...
... RTP
timestamp. This allows the receiver to reconstruct the timing of the
SMPTE 292M stream, without knowledge of the exact type of source
format (e.g., SMPTE ...
... SMPTE 292M stream, without knowledge of the exact type of source
format (e.g., SMPTE 274M or SMPTE 296M). With this timestamp, the
...
... stream, without knowledge of the exact type of source
format (e.g., SMPTE 274M or SMPTE 296M). With this timestamp, the
location of the first sample of each packet can be uniquely
...
... timestamp, the
location of the first sample of each packet can be uniquely
identified in the SMPTE 292M stream. At 148.5 MHz, the 32 bit
...
... The payload header also carries the 11 bit line number from the SMPTE
292M timing signals. This provides more information at the
application level and adds a level of resiliency, in case the packet
...
... +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
| |
: SMPTE 292M data :
: :
| |
...
... The following fields of the RTP fixed header are used for SMPTE 292M
encapsulation (the other fields in the RTP header ...
... Timestamp: 32 bits
For a SMPTE 292M transport stream at 1.485 Gbps (or 1.485/1.001
Gbps), the timestamp ...
... payload header in order to accommodate the 1.485 Gbps data rate of
SMPTE 292M.
...
... bit
The F bit as defined in the SMPTE 292M timing signals (see Table
1). F=1 identifies field 2 and F=0 identifies field 1.
...
... bit
The V bit as defined in the SMPTE 292M timing signals (see Table
1). V=1 during field blanking, and V=0 else where.
...
... The line number of the source data format, extracted from the
SMPTE 292M stream (see Table 2). The line number MUST correspond
to the line number of the first 10 bit ...
... RTP payload format and associated MIME
type, SMPTE292M. The MIME registration form for SMPTE 292M video is
enclosed below:
...
... flow is achieving. Since congestion control is
not possible for SMPTE 292M flows, this condition can only be
satisfied if receivers ...
... We would like to thank David Richardson for his insightful comments
and contributions to the document. We would also like to thank Chuck
Harrison for his input and for explaining the intricacies of SMPTE
292M.
...
... Society of Motion Picture and Television Engineers, Digital Representation and Bit-Parallel Interface - 1125/60 High- Definition Production System, SMPTE 260M-1999. ...
... Society of Motion Picture and Television Engineers, 1920x1080 50Hz, Scanning and Interface, SMPTE 295M-1997. ...
... Society of Motion Picture and Television Engineers, 1920x1080 Scanning and Analog and Parallel Digital Interfaces for Multiple Picture Rates, SMPTE 274M-1998. ...
... Society of Motion Picture and Television Engineers, 1280x720 Scanning, Analog and Digital Representation and Analog Interfaces, SMPTE 296M-1998. ...