Transcript Document 7708374

TSG/S13 Doc. 348R1
31 May 2006
ATSC TSG/S13 Chairman’s Report
on the
SRM Carriage Activity
Michael Dolan
Chair, S13
31 May 2006
Note
This is a report from the chairman of ATSC TSG/S13
providing a status of the SRM work activity. This
report is not a recommendation from the ATSC, nor is
it a consensus output of any ATSC subcommittee or
group.
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Project Statement
“Undertake work to define a System Renewability
Message (SRM) carriage mechanism, in the form of
an informational document or recommended practice,
utilizing the existing ATSC Private Data carriage.
Non-private data methods may be considered if
private data is shown to be insufficient.”
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History
Project approved in December
S13 work started in January
RFI issued in February
3 technical proposals received
Evaluation underway
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Scope
The project is to define the encapsulation in the ATSC
Transport Stream only. How the SRMs get into the
transport or how they are processed is not in scope
However, informative models are assumed on either
side to assist in validating the design:
– Insertion Model
– Acquisition Model
Feedback is solicited on these models that follow
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Insertion Model
SRM Provider A
Internet
or
Private
Network
SRM
Payload
Preparation/
Aggregation
SRM
Encapsulator
ATSC
Mux
ATSC TS
ATSC
Decoder
SRM Provider C
SRM Provider B
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Acquisition Model
ATSC
Delivery of
DTCP.SRM
HDCP.SRM
SmartRight.SRM
…etc.
ATSC Receiver
8VSB
Tuner/
Demod
MPEG-2
TSP
ATSC SRM
Parsing &
Passthrough
DTCP.SRM
HDCP.SRM
…etc.
DTCP.SRM
Process & Pass
HDCP.SRM
Passthrough
IEEE
1394
or
802.3/11
4C CPRM Recorder
DTCP.SRM
Process & Passthrough
HDCP.SRM
Passthrough
IEEE
1394
or
802.3/11
DTCP
DTCP
Record
Copy
Vidi Recorder
DTCP.SRM
Process & Passthrough
HDCP.SRM
Passthrough
DTCP
Play
Copy
Record
Copy
Play
Copy
HDCP.SRM
Process
4C CPRM DVDRW
Vidi DVD+RW
HDCP
HDCP.SRM
DTCP.SRM
HDCP.SRM
DTCP.SRM
HDMI/
DVI
IEEE
1394
rr
802.3/11
Play
Copy
Play
Copy
HDCP.SRM
Process
HDCP.SRM
Process
HDCP
HDCP
HDMI/
DVI
HDMI/
DVI
Trend:
Import and export between and among
various Content Protection Systems (CPS) and the
accompanying need to pass-through not only
that system’s SRMs but also those of other CPSs
to which the content might eventually flow.
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Note:
Some ATSC receivers are embedded within
HD displays and do not use external
digital interfaces and the associated CPSs.
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The Proposals
Proposal summary
– New table section (MPEG, Part 1)
– A/97 application (MPEG, Parts 1 & 6)
– IPMP application (MPEG, Parts 1 & 11)
No evidence that any fail to meet the requirements
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New Table Section
Defines a new MPEG-2 systems private section
(13818-1)
Long form table
MPEG CA_system_id code point used to
discriminate sections and SRM providers
Signaling either through Conditional Access Table
(CAT) or using a fixed PID (not yet decided)
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A/97 Application
A/97 - ATSC Software Download Service
Builds on MPEG-2 DSM-CC data carousel (13818-6)
IEEE Organization Unique Identifier (OUI) code
point used to discriminate data carousel modules (per
13818-6)
Signaling with PSIP service_type=5 and DSM-CC
messages
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IPMP Application
IPMP – Intellectual Property Management and
Protection
Builds on IPMP over MPEG-2 (13818-11)
MPEG CA_system_id and IPMP ToolID code points
used to discriminate the table sections per 13818-11
Signaling with CAT per 13818-11
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Evaluation
Evaluation criteria
–
–
–
–
–
Simplicity
Efficiency (i.e. bandwidth)
Use of existing standards
Flexibility (e.g. future SRM kinds and sizes)
ATSC design practice (e.g. long form tables)
Additional criteria being considered for:
– Decoder acquisition model
– Encoder insertion model
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Status and Next Steps
RFI issued 30-May seeking input on the code point
usage
Continue with evaluation criteria
Select design proposal
Draft document
Make recommendation to TSG in September
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