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Participation in W3C Web on TV Workshop

From: Keiya Motohashi <motohashi.k-fo@nhk.or.jp>
Date: Fri, 6 Aug 2010 16:11:12 +0900
To: <team-webontv-ws-submit@w3.org>
Cc: <fujisawa.s-ik@nhk.or.jp>, <katoh.h-km@nhk.or.jp>, <yfuna@tomo-digi.co.jp>
Message-ID: <ABF15345EF924F48B730A5C1E9D260C2@cop.nhk.or.jp>
Expression of interest in participating in the Workshop



Name, organization and contact details


Name: Shuichi FUJISAWA

Organization: NHK

E-mail: fujisawa.s-ik@nhk.or.jp


Name: Hisakazu KATOH

Organization: NHK

E-mail: katoh.h-km@nhk.or.jp



Organization: NHK

E-mail: motohashi.k-fo@nhk.or.jp



Participant's interest


In Japan, BML (Broadcast Markup Language) Version 1.0 was published in 1999
as a standard presentation language for digital television sets.

The language was standardized as a part of the Japanese digital broadcasting
system and has been used for years for various bi-directional/interactive TV
programs and social services since the BS (Broadcasting Satellite) digital
broadcasting service started in 2000.  BML is basically an extension for
existing Web standards, e.g., XHTML 1.1, and has been modified for various
(Japanese) broadcasting services including 110-degree East Longitude CS
Digital Broadcasting, Digital Terrestrial Television, One-Seg (Mobile
Terrestrial Digital Audio/Video and Data Broadcasting), CATV (Cable
Television) and IPTV (Internet Protocol Television).


As of July, 2010, the number of household television sets in use is already
more than 80 million in Japan.  Since almost all digital TV sets have BML
browser capability, a universal service using BML is getting realistic all
over the land.  Now digital TVs are getting the center of digital home
networks, and it is expected that they will be used not only as a receiver
for digital broadcasting but also as a central server for variety of
entertainment and essential information for everyday life.  Also it is
strongly desired that TV sets will be better integrated with Web
technologies, e.g., HTML5 and get even richer presentation capability.


We believe our knowledge and expertise on digital TV broadcasting technology
in Japan should be useful to this workshop and we should be able to provide
various use cases based on our long-term experience.

We are very interested in what kind of roles our expertise on digital
broadcasting would play in the context of Web standardization.




Point of View


We are especially interested in the points #1, 3, 5 of following statement.


1. TV and publicness



In case of natural disasters, usual infrastructures for communications like
telephones and mobile phones might not be available.  So providing disaster
information is one of the very important roles of broadcasting as a public
service.  We would like to introduce various use cases of public TV network
services in Japan.


2. TV devices and their resources



One of the characteristics of BML (Broadcast Markup Language) is the
well-defined balance of compactness and capability which was designed based
on the long-term discussion by both broadcasters and appliance vendors.  The
BML specification was published in 1999, and at that time hardware resources
were much less powerful than today.  We would like to (1) explain how BML
tackled poor hardware resource issue, and

(2) provide some suggestions to the workshop discussion, e.g., consideration
of extensibility for the future devices/environments.


3. Services implemented by BML



BML (Broadcast Markup Language) has sufficient APIs for MPEG2 TS (Transport
Stream), such as APIs for getting values of various descriptors in MPEG2 TS
and APIs with event handlers that notify BML applications when and how the
state of the current MPEG2 TS changed. These APIs have been used for various
TV program services in Japan.  Furthermore, there are services that use the
BML documents retrieved from web servers and that documents communicate with
web applications.  So, broadcasters can control their BML applications both
by the signals in MPEG2 TS (broadcasting) and by the responses from their
web servers.  We would like to introduce such existing use cases implemented
using BML and see what possible future use cases could be.


4. Collaboration between broadcasting and communication technology -




To implement actual IPTV services, it is very important to clearly define
(1) the interface between IPTV middleware, e.g., DRM (Digital Rights
Management), and browsers and (2) ECG (Electronic Content

Guide) metadata.  We would like to introduce several use cases based on our
IPTV service experiences in Japan, and see what possible future services
could be.


5. Collaboration between broadcasting and communication technology -R&D for
the next generation-



There are various pieces of advanced research on next generation
broadcasting within the context of Japanese digital broadcasting system.  We
would like to introduce several existing use cases and research topics
related to the scope of this workshop.


6. Comparison between BML and HTML5



We have been providing various broadcasting services based on BML (Broadcast
Markup Language) technology, and would like to show several use cases which
we believe should be discussed during this workshop.

We will explain the difference between BML and HTML5 as well.


7. TV as the hub of various information (A)



TV is now available in the center of living space at many homes, and it is
expected to become a central controller for home network which
receives/sends various information about entertainment and everyday life.
On the other hand, the arrival of HTML5 is dramatically changing the
situation and it is expected TV will get even nicer presentation capability
and provide even richer user experiences.  We would like to show several use
cases of next generation TV as the hub within home network and see how it
could be implemented using Web technologies.


8. TV as the hub of various information (B)



TVs are installed and used in the center of living space at many home in
Japan now, and there is expectation they will become the main controller for
various devices within home networks which handle Input/Output information
for various entertainments and essential information for people's life.
Also TV sets are getting much smarter powered by Web technologies like HTML5
and have started to provide richer user experiences.  We would like to show
several possible use cases of TV as the hub of various information, and
discuss how Web technologies would be useful for them.


9. TV as the hub of various information (C)



It is expected TV and broadcasting system will provide not only audiovisual
information as currently distributed by broadcasters and communications
media but also various services and new user experiences in the near future.
In order to materialize that kind of new TV system, we believe it is
essential to (1) analyze possible future use cases, (2) consider smarter
integration with Web technologies including connection to various non-TV

Received on Friday, 6 August 2010 12:21:52 GMT

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