International Telecommunication Union
Home Server/Network
Systems toward Digital
Broadcasting
Keiichi Murakami
FUJITSU Laboratories
TA8/TC100/IEC
ITU-T Workshop on Home Networking and Home Services
Tokyo, Japan, 17-18 June 2004
TC100 : Audio, video and multimedia
equipment and systems
ITU-T
(Established in 1995)
TC100
AGS
Chairman
Advisory
Group on
Strategy
TA
Technical Area :
corresponds to SC
dates
Secretariat
AGM
GMT
Advisory
Group on
Mngmnt
Project
General
Maintenance
Team
2
Title of each TA
ITU-T
TA1: Terminals for audio, video and data
services
TA2: Colour measurement and management
TA4: Digital system interfaces and protocols
TA5: Cable networks for television signals,
sound signals and interactive services
TA6: Higher data rate storage media, data
structures and equipment
TA7: Moderate data rate storage media,
equipment and systems
TA8: Multimedia home server systems
dates
3
TA8: Multimedia home server
ITU-T systems
o
o
Established in May, 2002
Background:
1. Growing Terrestrial Digital TV Broadcast
2. Growing PVR (Private Video Recorder)
3. Homeserver-based Broadcast Service
Introduction
o
Activities up to now:
1. U Conceptual Model of Homeserver
2. DF-based removable recording format
3. API for removable media
4. DRM (Newly started)
dates
4
ITU-T
Homeserver-based Broadcast
Services
o Store contents in a large capacity storage
o Access control at the time accessing the
stored contents, including DRM
o Sophisticated services using Meta Data,
EPG, and/or uplink access channel
Home Server
Digital TV
Broadcast Server
Cable/DSL/FTTH
dates
ISP Server
5
ITU-T
TA8’s Homeserver Conceptual
Model
Head End
CNTRL
In-house Network IF
CNTRL
Interchangeable Storage
Media Port
CNTRL
User IF
Functional Modules
dates
CNTRL
AP
I
High
Capacity
Storage
CNTRL
Contents
CNTRL
6
Digital TV Services in US
ITU-T
o
o
o
Satellite: ’94- DirecTV, USSB
Terrestrial: ’98- top four & PBS
ATSC (Terrestrial)
1. 18 video format including SD & HD
2. DASE: multimedia broadcasting
using XHTML, CSS, Java
o
Anti-piracy mechanism (FCC, ’05-)
1. Broadcast flag, no encryption
2. Private copy will not be restricted
dates
7
Digital TV Services in Europe
ITU-T
Satellite: ’96- Germany, France, ’98- G
o Terrestrial: ’98- GBR, ’99- Sweden,…
o DVB-S (Satellite), DVB-T (Terrestrial)
o
1. Video format is not provided
Mainly SDTV is available today.
2. EPG, Service information (DVB-SI)
3. Conditional access (DVB-CI)
4. Multimedia middleware (DVB-MHP)
dates
8
Digital TV Services in JAPAN
ITU-T
1996- Satellite
2003- Terrestrial
o ISDB-S (Satellite), ISDB-T (Terrestrial
o
1. HDTV or SDTV multi program
2. BML Data Broadcasting
3. Bidirectional services via the internet
o
Contents protection by B-CAS (’04-)
1. Encrypt contents
2. Restrict copy up to once
dates
9
Roadmap for Diffusion of
Terrestrial DTV set in JAPAN
ITU-T
% Percentage of households owning DTV set
100
48,000,000
households
80
24,000,000
households
60
40
20
10,000,000
households
’04
Athens
Olympic
dates
’05
’06
World Cup
In Germany
’07
’08
Beijing
Olympic
’09
’10
World Cup
’11
Stop of
Analog TV
10
ITU-T
Issues to be Solved for DTV
- Reasonable Copy Protection o
Heavy restrictions in Japan
1. No duplication: only “move” allowed
2. Contents on a removable media
playable only on authorized players
o
Light weight restrictions in U.S.
1. Broadcast flag permits fair use copy
dates
11
Example of Copy Protection
Regulation
for PC in Japan
ITU-T
Tuner
Decrypt
Broadcaste
d Data
Video Card
Local
Encryption
Local
Decryption
Display
PCI Bus
No Raw Data on
Storage
the PCI Bus
(User Accessible Bus)
dates
12
MPEG-2/4 IPMP : Outline
ITU-T
o
o
International Standard for Intellectual
Property Management & Protection for
MPEG Audio Visual contents
Basic concept is an architecture for
secure coordination framework for IPMP
tools.
Various CA/DRM tools (Authentication,
Encryption/Decryption, Watermarking,
etc.) can be applied
2. Tools are managed via IPMP Control Graph
and handled as Blackbox.
1.
dates
13
MPEG-2/4 IPMP : Status
ITU-T
o
o
Not widely used in current mass
market
Markets in which MPEG-2/4 AV
contents are widely used already have
its own simple CA/DRM related
mechanism.
1. DVD
2. Digital Broadcast
3. AV clip for 3G mobile phone
o
dates
Reasonable DRM implementation
example required to enlarge market
size and to reduce equipment cost
TC100
activities
14
Home Network: History
ITU-T o
Access network:
1. External PSTN modem
2. Internal PSTN modem
3. External ADSL modem/FTTH converter
4. Internal ADSL modem ?
How about FTTH converter ?
5. Cable modem: stay independently
o In-house network:
1. No practical network at home until recently:
-1394: replacement of RCA pin jack
2. Very few WLAN audio streaming
3. Very few modem/printer/storage sharing
o The situation is changing
dates
15
ITU-T
Emergence of Network Media Player
- First Practical Homenetwork Device -
Analog A/V Cable
Access Network
WLAN / Ethernet
Network Media Player
With MPEG Decoder
dates
16
TA8 activities (1)
ITU-T
o TR 62291: API for UDF based file
systems
o TS 62318: Home server conceptual
model
o P62328: Interchangeable volume/file
structure adaptation for
broadcasting receiver
dates
o PT61925: The vocabulary of home server
17
ITU-T
TA8 activities (2)
Interchangeable volume/file
structure adaptation for
broadcasting receivers
This standard defines the volume and file structure
required for interchanging multimedia data of a
home server/broadcasting receiver, which consists
of an AV stream with multiple associated objects.
Part 1: General description and architecture
Part 2: General recording structure
Part 3: Broadcasting system specific recording
structure - ISDB
Specifications for other country/region are expected to be proposed.
dates
18
TA8 activities (3)
Interchangeable volume/file
structure adaptation for
broadcasting receivers
(continued)
ITU-T
Root
TVR_ROOT
PROG_SETMGR
EXT_PS.MGR
root directory for TV
recording format
program set
management file
RT_TVRS
extended program set
management file
TVPR010
PROG0001.PIF
TV recording format
specific directory
PROG0002.PIF
TVPR020
directory
other structure
file (including stream files)
dates
PROG0001.PIF
PROG0002.PIF
19
TC100 Liaison
ITU-T
AES (Audio Engineering Society)
ITU-R/SG6M, 6Q
ITU-T/SG9, 12, 16
JTC1/SC29 (Multimedia Coding)
SMPTE (Society of Motion Picture
and Television Engineers)
o 1394TA
o ISO/TC42 (Photography)
o
o
o
o
o
dates
20
Closing Remarks
ITU-T
o Home server/network-related TC100
activities were introduced.
o PC is now leading the home network with
network media player.
o Broadcasting services based on home
server will drive gateway function between
in-house network and access network.
o DRM is the key issue for A/V network
deployment.
dates
21