Overview
ISO/IEC 13818-6:1998/Amd 2:2000 is an important international standard issued by ISO and IEC that extends the MPEG-2 Systems specification. It focuses on the Generic Coding of Moving Pictures and Associated Audio Information with specific extensions for the Digital Storage Media Command and Control (DSM-CC) protocol. Amendment 2 introduces critical additions that support synchronized download services, opportunistic data services, and resource announcements in broadcast and interactive environments.
This amendment enhances the ability to manage non-streaming synchronized downloads, opportunistic broadcast data distribution, and the dynamic announcement of system resources, enabling more efficient multimedia broadcast and interactive services delivery.
Key Topics
-
DSM-CC Synchronized Download Protocol Adaptation Format
Defines a new adaptation type to support synchronized, non-streaming download delivery aligned with MPEG-2 Transport Stream timing using Presentation Time Stamps (PTS).
-
Opportunistic Data Services
Incorporates the SMPTE 325M Opportunistic Flow Control Protocol to maximize bandwidth usage by broadcasting additional data during available timeslots dynamically. This flow control facilitates real-time management between a data server and transport multiplexer.
-
Resource Announcement and Descriptor Enhancements
New resource descriptors support discovery and management of program elements and communication channels, including:
- Deferred MPEG Program Element Descriptor for referencing elements across different transport streams
- Internet Protocol Version 6 (IPv6) Resource Descriptor to announce IPv6 communication channels
- URL Resource Descriptor to reference internet URLs
- DHCP Resource Descriptor for DHCP message transport
-
Stream Type Extensions
Addition of new DSM-CC stream types, notably supporting the synchronized download protocol (stream_type 0x14), ensuring compatibility and correct stream identification.
-
Network Model Restrictions
Specifies that the synchronized download protocol applies exclusively to Network Model 4, enforcing consistent implementations.
-
Transport Stream Packet Constraints
Details on packet encapsulation rules for DSM-CC synchronized downloads to ensure correct parsing and synchronization.
Applications
-
Broadcast Multimedia Systems
Enhances broadcast services by enabling synchronized downloads of content modules, critical for interactive TV and multimedia on-demand applications.
-
Interactive Services Delivery
Facilitates opportunistic data delivery in interactive setups, optimizing available bandwidth for data bursts without interrupting continuous streaming content.
-
Network Resource Management
Improves client-server resource negotiation through advanced descriptors supporting IP-based communication, program element referencing, and network protocol configurations.
-
Hybrid Broadcast-Broadband (HBB) Environments
Supports hybrid networks by providing structured resource announcements and control mechanisms essential for combining broadcast and broadband interactions.
-
IP-Enabled Multimedia Systems
Provides standard descriptors for IPv6 connections, URL access, and DHCP messaging within the MPEG-2 transport framework, enabling seamless IP communications in multimedia services.
Related Standards
-
ISO/IEC 13818-1 (MPEG-2 Systems)
Defines the core MPEG-2 Transport Stream and system-level timing reference (PTS) foundational to this amendment.
-
ITU-T Rec. H.222.0
Provides specifications referenced for timing and transport stream structures throughout this amendment.
-
SMPTE 325M
Digital television standard addressing Opportunistic Data Broadcast Flow Control - essential for opportunistic data service support.
-
IETF RFC 1738
Defines URL (Uniform Resource Locator) syntax, used for resource descriptor referencing.
-
IETF RFC 2131
Covers DHCP (Dynamic Host Configuration Protocol) used in the DHCP Resource Descriptor.
Keywords: ISO/IEC 13818-6 amendment 2, DSM-CC synchronized download, opportunistic data services, MPEG-2 transport stream, DSM-CC resource announcement, synchronized download protocol, interactive broadcast services, SMPTE 325M, IPv6 resource descriptor, URL resource descriptor, DHCP resource descriptor, MPEG-2 systems extension, MPEG-2 protocol enhancements.