Broadcasting for mobile receivers

• Features of One-Seg
– Not only video & audio, but data, closed caption, and Electric Program Guide (EPG) are transmitted in One-Seg. – One-Seg is a new medium that realizes the convergence of broadcasting & communications on the mobile terminal. to slide 10,11
Geneva, 13-16 July 2009 5
Next Steps/Actions
• VHF/UHF rearrangement after analog TV termination
– Frequency bandwidth for terrestrial television will be reduced from 370MHz to 240MHz. – VHF Low (18MHz) & VHF High (14.5MHz) will be allocated for non-TV broadcasting services. (e.g., Mobile Multimedia broadcasting)
DOCUMENT #: FOR: SOURCE: AGENDA ITEM: CONTACT(S):
GSC14-GRSC7-009R1 Information ARIB 4.2 Mobile Multimedia Broadcast & Multicast sekiguchi@arib.or.jp
Broadcasting for mobile receivers
Geneva, 13-16 July 2009
Highlight of Current Activities (1)
• Digital Terrestrial TV service in Japan
– On December 1, 2003, Japan launched Digital Terrestrial Television Broadcasting (DTTB) using the Integrated Service Digital Broadcasting - Terrestrial (ISDB-T) transmission system. – ISDB-T is recommended in Rec. ITU-R BT.1306. – ISDB-T is robust transmission system because it uses OFDM and time interleaving.
Highlight of Current Activities (2)
• BST-OFDM technology
– NHK developed the Band Segmented Transmission OFDM (BST-OFDM) technology for ISDB-T in 1996. – ISDB-T consists of 13 OFDM segments. – The system supports hierarchical transmissions of up to three layers, and parameters can be changed in each layers. – Typically we use two layers. One is a layer for HDTV with 12 segments using 64QAM, and the other is a layer for One-Seg with 1 segment using QPSK. – Example of Information bit rate is 16.851Mbps (for HDTV) and 416kbps (for One-Seg).
million 60 Shipments of receivers (cumulative total)
Shipments of receivers of Digital terrestrial broadcasting & Mobile phone with One-Seg tuner
50
Digital terrestrial *1 One-Seg *2
• Digital Radio
– Digital terrestrial radio (DR) test transmission started in October 2003. – Programs are transmitted by the Digital Radio Promotion Association (DRP), a licensed broadcasting corporation run jointly by NHK and several commercial radio stations or other companies. – DR uses a vacant VHF TV channel (CH-7) for the test transmission. – ISDB-TSB (Sound Broadcasting) transmission system is adopted for DR.
• One-Seg
– One-segment services for mobile receivers (called “OneSeg”) can be provided simultaneously with one 6MHz TV channel, in addition to HDTV (or multi-channel SDTV). – On April 1, 2006, One-Seg services began in Japan. – More than 55 million One-Seg receivers have been shipped so far. – Various kinds of One-Seg receivers are available on the market. to slide 8,9 – One-Seg is provided free13-16 July 2009 of charge. Geneva, 2
40
30
20
More than 50 million One-seg receivers
10
0 10/2004 10/2005 10/2006 10/2007 10/2008 1/2004 4/2004 7/2004 1/2005 4/2005 7/2005 1/2006 4/2006 7/2006 1/2007 4/2007 7/2007 1/2008 4/2008 7/2008 1/2009 4/2009
Geneva, 13-16 July 2009 6
Supplemental Slides
Geneva, 13-16 July 2009
7
Shipments of receivers - Digital Terrestrial TV in J
• Mobile Multimedia broadcasting
– There’s a chance to start new multimedia broadcasting services for mobile receivers with VHF Low & VHF High. – VHF Low will be used for Digital Radio broadcasting for local block area and Digital community broadcasting for small area. – ISDB-TSB is now under consideration for new services. – VHF High will be used for a new nationwide area multimedia service. And ISDB-Tmm (Mobile Multimedia) is now under development for it’s services. – One-Seg, ISDB-TSB, and ISDB-Tmm are all ISDB-T family that introduce the BST-OFDM technology. – It is necessary to fix the organizations that will provide new services by the middle of 2010 to start broadcasting after July 2011. – ARIB is now preparing for the new services for multimedia broadcasting. to slide 14,15
to slide 12,13 Geneva, 13-16 July 2009 4
Challenges
• Recent topics in One-Seg
– Independent program service It is possible to broadcast independent program (nonsimultaneous program to 12 segments) service in OneSeg from April 2008 by legal changes. NTV started to broadcast independent One-Seg test service for sports programs. NHK started independent One-Seg service using educational channel in April 2009. – Multi-channel service It is possible to send up to 3 programs in One-Seg. TOKYO MX started 2 programs One-Seg service when they broadcast multi-channel service in June 2008.