Eight Consumer Electronics Companies Release Home Audio/Video Interoperability (HAVi) Core Specification for Networking Digital AV Appliances|
14 May, 1998
(May 14, 1998) GRUNDIG A.G., Hitachi, Ltd.,
Matsushita Electric Industrial Co., Ltd. (Panasonic),
Royal Philips Electronics N.V., Sharp Corporation,
Sony Corporation, Thomson Multimedia S.A. and Toshiba Corporation
today announced that a core home networks specification for AV
electronics appliances has been compiled for release to
interested companies. The 8 companies plan to actively
promote the HAVi (Home Audio-Video interoperability)
core specification as a home network standard for the
AV electronics and multimedia industries.
The remarkable growth of the digital AV market in recent
years has made it apparent that the time will come when
users will find it necessary to be able to connect their
digital AV appliances to create home entertainment networks.
For different brands of AV electronics appliances to be
interconnected and interoperated, each appliance must
incorporate middleware that contains certain software
elements common to all appliances on the network.
The core open home network specification defines these
elements, their roles, and their functions. In addition,
it ensures that the software elements of different
appliances will work together.
Home networks comprised of AV appliances which incorporate
the core open home network specification will provide users
with the convenience of the following:
- A) Plug-and-Play Connectivity
Users will be able to create a home network simply by
connecting various electronics appliances through their
digital interfaces, such as the IEEE1394. If a user wants
to add a new appliance to or remove an appliance from
the network, he or she can do so without adjusting any
settings because the appliances would be able to communicate,
recognize changes in the network configuration, and automatically
make adjustments to the network settings without interrupting
the functioning of the network.
- B) Appliance Interoperability
Not only would users be able to interconnect and interoperate
AV electronics appliances based on this specification, but in
the future it will also be possible for appliances on the network
to share functionality. This means that any one appliance could
make use of the functions and capabilities of the many different
appliances connected to the network.
- C) Future-proof Appliances
Once appropriate applications software is developed, electronics
appliances incorporating these specifications will be able to
share functionality. This means that consumers will be able
to import functions from newly purchased appliances into
appliances purchased earlier as long as both appliances
incorporate the HAVi specification.
The main software elements included in the core specification
are described below. (For a more detailed explanation of
these elements, please see the attached page.)
||1394 Communications Media Manager (CMM) -
acts as an interface between the other software
elements and the IEEE1394.
|| Event Manager (EM) - informs the various software
elements of events in the network such as the changes
in the network configuration that occur when
appliances are added or removed from the network.
||Registry - maintains information about the appliances
connected to the network and the functions they offer.
Applications can obtain this information from the registry.
||Messaging System (MS) - serves as an API
(Application Programming Interface) that facilitates
communication between the software elements of the various
appliances on the network.
||Device Control Module (DCM) - represents an
appliance on the network. Applications programs
can interact directly with a DCM. This shields
them from the idiosyncrasies of each individual appliance.
||DCM Manager - Installs the DCMs. It automatically
reacts to changes in the network by installing new DCMs
for new appliances
||Data Driven Interaction (DDI) Controller - renders
a GUI (Graphical User Interface) on a appliance's
display on behalf of a HAVi software element.
It supports a wide range of displays, varying from
graphical to text-only.
||Stream Manager (SMGR) - creates connections and
routes real-time AV streams between two or more
appliances on the network.
Grundig, Hitachi, Matsushita, Philips, Sharp, Sony,
Thomson and Toshiba plan to promote the HAVi core
specification broadly as an open standard not only
for the AV electronics industry, but for the entire
multimedia industry as well.
The HAVi core specification is available at the
following web-sites for evaluation purposes only.
The release of the HAVi core specification does not
convey an implied or express license to make or distribute
any product under any patent right, copyright or any other
intellectual property right protecting any part of the HAVi
core specification. Details regarding the licensing of
the HAVi core specification or any update thereof will be
made available in early October 1998.
HAVi core specification download page|