April 14, 2005 Status Report of ATSC TSG (T3) Ad Hoc Group on SRMs

Scope:“To develop a set of requirements and a work statement for developing a recommended practice for the carriage of content protection System Renewability Messages (SRMs) in ATSC transport streams and in MPEG-2 single program transport streams”.

Deliverable:

ATSC SRM Carriage Specification (Workplan and Requirements)

Status/Plan: Dec (‘04) – start of activity April 1 - draft sent to ATSC SRM ad hoc group for review April – comment period May 9-10 – submit for approval to ATSC Technology and

Standards Group (TSG)

DRAFT Workplan Overview

Workplan:

May 2005 – Approval of work plan and requirements

May-July 2005 – Receive technical contributions

Aug-Sep 2005 – Generate first draft of specification

Oct – Nov – Validate, test, receive comments

Dec 2005 – Approve final specification

DRAFT Requirements Overview

General Requirements:

The SRM Carriage Specification shall:1. provide an effective solution to the broadcast stream and

downstream problems described in section 5.1 (the general problem statement);

2. allow the standardized insertion and carriage of the various SRMs in MPEG-2 Transport Streams and in ATSC Transport Streams;

3. define how broadcasters insert SRMs into their ATSC broadcast streams;

4. define how an ATSC receiver can identify and parse these SRM files in the transport stream in order to pass them to the CPSs implemented in that ATSC receiver or

5. define a means for transmission of SRMs to downstream CPSs other than those specifically implemented in the ATSC receiver;

6. define how the SRMs for each CPS can be uniquely identified;

DRAFT Requirements Overview

Support for several CPSs:

The SRM Carriage Specification shall support the carriage of SRMs for the following CPSs:

1. Digital Transmission Content Protection (DTCP)

2. High-bandwidth Digital Content Protection System (HDCP)

The SRM Carriage Specification shall support at least twenty distinct CPSs.

The SRM Carriage Specification may assume that the additional CPS SRM architectures are similar to that of DTCP or HDCP.

DRAFT Requirements Overview (Other requirements)

The SRM Carriage Specification shall define a generic encapsulation format for the private SRM data of each CPS.

The SRM Carriage Specification shall support both live streaming architectures and carousel feed storage architectures.

The SRM Carriage Specification shall support the following with respect to each CPS:Support file sizes of __________Support repetition rates of _________Support throughput requirements of _________Support storage requirements of ________

The SRM Carriage Specification shall support the following means of carriage:- ATSC digital terrestrial broadcasts- Digital cable re-carriage and transcoding- Digital satellite re-carriage and transcoding- Propagation to downstream devices

Status Report of ATSC T3 Ad Hoc Group on SRMs

Contact information

Chairman:Jim C. WilliamsVice President, Television & Video Systems StandardsMotion Picture Association of Americajim_williams@mpaa.org +1-818-382-1776

To join “srm-ahg”, send request to Jerry Whitaker and copy Jim Williams.Jerry WhitakerVP, Standards DevelopmentAdvanced Television Systems Committeejwhitaker@atsc.org +1-202-872-9160