INTERNATIONAL TELECOMMUNICATION UNION Document 6 – E
TSB DIRECTOR’S CONSULTATION
MEETING ON IPTV STANDARDIZATION
Geneva, 4-5 April 2006
Source: NTT, KDDI, Hitachi, Matsushita Electric Industrial, Mitsubishi Electric, Sharp,
Title: The IPTV concept model discussed in Japan
The IPTV concept model discussed in Japan
This draft describes the basic requirements and the concept model of the IPTV services currently
discussed in Japan. Major telecommunications companies and consumer electronics vendors that
are interested in IPTV have been working together to define the service requirements and
Content delivery services on IP network, such as broadcasting over IP and video on demand, are
currently getting into the market. At this stage, there are no established standards in the market. In
many cases, because of the lack of standardized technologies, unnecessary investments are required
or new services are made impossible. It is also feared that because this situation some businesses
may be forced to use some proprietary solutions, leading to excessive costs or overly restrictive
services. There seem to be some cases in which businesses are hindered because of legal and
economic issues, caused by strategies and technologies which disregard the historical, cultural and
social differences that have traditionally existed between content distribution businesses and IP
This state of affairs would not only unnecessarily restricts the scope of the content delivery
services, as one of the most important services on IP network and hinders the sound development
Contact: Jay Kishigami Naohiko Amemiya
NTT KDDI Corporation
Tel:+81-3-5205-5845 Tel: +81-3-6678-4101
Attention: This is not a publication made available to the public, but an internal ITU-T Document intended only for use by the
Member States of ITU, by ITU-T Sector Members and Associates, and their respective staff and collaborators in their ITU related work.
It shall not be made available to, and used by, any other persons or entities without the prior written consent of ITU-T.
of the market and businesses, but also eventually prevents the consumer from enjoying the utility,
services, and rights they are rightfully entitled to.
Interoperable standards that would help provide and enjoy end-to-end services from the content
holders to consumers and would give fair opportunities to each player in the value chain and with
due respect to the differences in regions, countries, as well as those in service types and business
models, would greatly contribute to the improvement of, and the normalization of the imbalances
in, the life and culture of humanity, with the effective use of content delivery technologies over IP
1. IPTV Services
In Japan, major telecommunications companies and consumer electronics vendors that are
interested in IPTV have been working together to define the service requirements and technologies
to be used for IPTV.
The following are the types of reference services that are considered for IPTV:
1. Content Delivery Service
i) IP Broadcasting Service: Scheduled Programs delivered by IP-multicast streaming
ii) Video-on-Demand Service: On-demand videos delivered by unicast streaming
iii) Near Video On Demand Service: Programs delivered by IP-multicast in a carrousel manner.
iv) Download Service: Content streamed or downloaded to a storage device on the terminal for
2. Content Navigation Service
i) Portal Service: in which a service provider provides a web-based portal service wherein the
- receive promotion information, get a basic subscription, renew and update services;
- search, select, and acquire audio-visual and other multimedia content
ii) Metadata Service and Advanced Electronic Content Guide: Metadata for schedule programs
and on-demand content, as well as for those downloaded and carousselled, are used to
provide rich and advanced navigation capabilities as electronic content guides (ECG) and
electronic program guides (EPG)
2. Technologies to be standardized regarding IPTV
In order to realize afore mentioned services, we are currently defining the specifications in the
following technology areas:
•Receiver Terminal Functionalities
•Access Control and Receiver Specification
•Encoding and Transmission
The following diagram shows the reference model for a receiver device.
In view of the rapid development of IPTV services, ITU is advised to consider and recommend the
approaches and requirements relevant to IPTV services and the requirements relevant to interactive
multimedia services carried on telecommunications broadcast systems.
More specifically, the following key technology areas related to IPTV need to be addressed within
2.1. Network Protocols, Transport
Not only the protocols that are necessary for IPTV services but also those that are relevant to more
conventional, e.g., web-based services, to be used in conjunction with broadcasting, need to be
discussed and reviewed so that the terminal receivers will be able to act as integrated web terminal.
Those protocols will likely include IETF RFC’s and other web-oriented specifications. Encoding
and multiplexing are other issues that need to be addressed.
2.2. Content delivery mechanism
Content delivery over IP can be realized using various methods, more than in the conventional
broadcasting. Technologies and standards in the conventional services should be reviewed and
recommendations be made. For multicasting it is envisaged that technologies like IGMP/MLD,
which have been specified by IETF, will be used, but the details have to be reviewed rigorously.
The video-on-demand is also to be specified. The pseudo-on-demand based on downloading The
issues to be discussed include content control issues such as multicasting and trick play as well as
quality issues like Forward Error Correction (FEC) and Quality of Service (QoS). In this respect,
the consultations of Y.1540 and Y.1541 will also be relevant. The issues under this heading are
closely related to network and transport protocols.
2.3. Content Formats
It is necessary to recommend standardized formats and encoding methods of content. In the current
broadcasting, MPEG-2 is generally used, but it is expected that other formats, such as H.264, will
be useable in IPTV environment. For maximum interoperability, careful review of the relevant
technologies is necessary.
2.5. Terminal Functionality
The terminal receivers for IPTV must take into account the possibility of connecting with other
devices, within and without the home network environment. Access to webcasting and the use of
the receiver as an interactive web terminal offer important service scenarios. Standards and
specifications regarding this area should be recommended.
2.6. Interactive Multimedia and Data Applications
Many technologies are used on IP networks for the purpose of specifying, presenting, and executing
interactive multimedia and data applications. In the broadcast and broadcast-like platforms, as
identified in Recommendation ITU-R BT.1369, there are several different standards, which are in
general distinct not only from each other, but from those widely used in the IP world. The
interoperability between these is of utmost importance, because the cost of content creation and
business models would be greatly affected. Especially in the IP world, where several de facto
technologies coexist but a real interoperability is yet to be achieved, the interoperable interactive
middleware would be truly welcome not only for the user but also for service operators.
2.7. Metadata and Service Discovery
For the purposes of searching, finding, and acquiring programs, as well as for advertising and
promoting content, the IPTV service must support metadata in general and digital program guides,
in particular. This involves specifications for IPTV service discovery and identification of content
and locations, and others. The metadata specifications such as TV-Anytime, DVB, and others,
including service information in digital broadcasting for simple electronic program guide will be
2.8. Rights Protection and Security
Security and rights related issues are important aspect of any content delivery service. IPTV service
in particular needs to have robust security mechanisms to protect the rights of content holders as
well as providing optimal functionalities to the user. IPTV services need to accommodate, and seek
to interoperate with, the currently existing conditional access systems so that broadcast content is
easily integrated into the IP world, and also the robustness of the security policy in broadcasting can
be enforced in IPTV. Authentication, content protection, and rights management information are
some of the issues to be reviewed. The current web security mechanisms like SSL are also to be
3. Proposed Directions of Standardization Processes
3.1. Current status of IPTV-related SGs
The following table summarizes the current status of the ITU-T SGs relevant to IPTV.
Table 1. Drafts relevant to IPTV within ITU-T
Rec. (draft) Synopsis
J.241 Recommendation on the quality of IP broadcasting; describes transport
quality of IP-level and video quality on set top boxes.
J.281 Requirements for IP broadcasting using FTTH
J.mcvif-arch Draft recommendation on system architecture of IP broadcasting
J.stb-mi-a Draft recommendation on the architecture of STB for IP broadcasting
Y.1541 Draft Recommendation on the classification of IP-network quality.
Appendix IX mentions the quality of IP-broadcasting.
F.741 Recommendation on the service scenarios of audio/video on-demand
services. Some mentions of N-VOD and IPTV.
F.750 Metadata Framework Recommendation
Though some of the SGs within ITU have liaison relations with others, activities encompassing
several projects are desired and it is important to create a ITU-T general set of recommendations.
3.2 Standardization activities outside ITU
There are several organizations working on the IP-related broadcasting standards. Most notable of
these are: DVB (Digital Video Broadcasting ), ETSI(European Telecommunications Standards
Institute), TV-Anytime Forum, ATSC (Advanced Television Standards Committee), ARIB
(Association of Radio Industries and Businesses). In our recommendation on the IPTV services and
technologies, it is important that their standards be taken into serious consideration, and the liaisons
with them will be essential.
3.3 Framework for standardization
The discussion on the standardization of IPTV should involve all the major players in the value-
chain of the services on IP content delivery. It is also desirable that appropriate liaisons should be
made between existing standardization bodies which are also working on similar aspects as well as
those working on more conventional areas of broadcasting and content delivery.