Transcript of "Digital Broadcast Technology Development:"
Digital Broadcast Technology Development Presented by John Yip Chief Engineer RTHK 2006.12.06
1. Introduction <ul><li>Broadcast Development </li></ul>TV on Cable and Satellite, MUSE analog HD 1960 1970 1980 1990 2000 DAB TV <ul><li>DTT/ HDTV </li></ul><ul><li>IPTV </li></ul><ul><li>Mobile TV </li></ul><ul><li>(T-DMB, DVB-H, </li></ul><ul><li>MediaFLO, One Seg) </li></ul>
1. Introduction <ul><li>Quad-play Mix: TV/ IT/ Telecom/ Wireless </li></ul>DTT/ HDTV, IPTV-SD, 3G, S/T-DMB, WiMax Yesterday Today Tomorrow DVB-H, CMMB, IPTV-HD on VDSL2, 4G-OWA ? SD-TV, Broadband Internet, 2.5G, WiFi * Mature Digital TV and IP Technologies: Multi-platforms (horizontal) and multi- qualities (vertical) for the viewers. Challenge Maximize ROI (savings, revenue)/ business value. New Digital Age
1. Introduction <ul><li>Convergence </li></ul>Converging technologies lead to a divergence of viewers’ choices . Quality: traded-off against mobility , transmission costs . Video bitrates, from 0.2 Mbps (for mobile phones) to over 100 Mbps for HDTV. Quality vs user cost, but technologies provide flexibility, improvements. <ul><li>Quality </li></ul>
1. Introduction <ul><li>Content is King + Customer is Queen </li></ul>Compelling contents can drive people to buy new technologies, e.g. sports. People’s habits/ life styles are then gradually changed by the new technologies . - Ubiquitous: anywhere, anytime, desired form - Mobility increases - Threshold of acceptable quality dropping - Networked environment eg office, home - Time-shifted viewing/ listening eg PVR, ipod - Interactive <ul><li>General Trends </li></ul>
2. Technologies Radio , DDD TV , TTT Wireless Services , MMM Media Technologies
<ul><li>Radio : DAB, DRM, DMB </li></ul>DAB (Digital Audio Broadcasting) A technology for multi-channel audio broadcasts. Based on European Eureka-147 standard, developed in mid 1990’s. DRM (Digital Radio Mondiale) An open-source platform for digital radio broadcasting in AM, SW or FM bands. Fits within existing AM channel bandwidth. DMB (or T-DMB, Digital Multimedia Broadcasting) A digital system for sending data, radio and TV to mobile devices such as mobile phones. Developed by S. Korea (T-DMB, S-DMB). DAB-compatible. 2. Technologies - Radio
2. Technologies - TV <ul><li>TV - DTT </li></ul>(Digital Terrestrial TV) Using digital technology to provide - more channels ( SDTV ) and/ or - better picture ( HDTV ) and sound (surround) through a TV antenna eg on top of the roof, instead of using cable, satellite or internet.
<ul><li>TV - HDTV </li></ul>2. Technologies - TV <ul><li>(High Definition TV) </li></ul><ul><li>16 x 9 aspect ratio. </li></ul><ul><li>Studio Standard: 1080/50i in 50Hz countries (HK/China). 720/50p is also used in Europe, Australia. </li></ul><ul><li>Transmission standard: country-dependent. </li></ul><ul><li>Picture information about 5 times that of conventional TV </li></ul><ul><li>Needs critical camera focusing and attention to the wide aspect ratio. OB can use fewer cameras. </li></ul><ul><li>Compatibility with 4x3 SDTV: some down-convert to 14x9 or 13x9. </li></ul>
<ul><li>TV - DTT / HDTV </li></ul>2. Technologies - TV Chart 1: World-wide, DTT/ HDTV Transmission DTT sets >3M sets, about 2/3 are HD ready. ATSC S. Korea >1.2M sets. >21 HD channels. ATSC Canada >17M DTV sets sold. Most TVs have ATSC tuners. >1,525 stations, 211 cities. Analog-off planned : Feb. 17, 2009. ATSC USA 24 HD channels in service eg Euro1080 HDTV. Germany: Pay-HD. See also UK. Satellite, mainly Europe 5 HDTV program channels in service. Analog off : later than 2015. DMB-T/ H China (Mainland) Progress Technical Economies
<ul><li>TV - DTT / HDTV </li></ul>2. Technologies - TV Chart 1: World-wide, DTT/ HDTV Transmission (Cont.) >10 M DTT Rx’s, >1.4M sets are HD-ready. BBC to introduce HD in 2007. DVB-T, 8 MHz UK DTT >12 M sets, about 7M are HD ready. HD started in 12/2003. Analog off by July 24, 2011. ISDB-T Japan Jan. 2001, DTT commenced. >2 M DTT units. Free-to-air HD broadcasts. Analog off by 2012. DVB-T, 7 MHz Australia Progress Technical Economies
<ul><li>TV - IPTV </li></ul>2. Technologies - TV <ul><li>(Internet Protocol TV) </li></ul><ul><li>Use of Internet Protocol (IP) for home TV transmission, can be over phone lines , via optical fibre trunks . </li></ul><ul><li>Flexibility of including interactive services and HDTV . Offers many TV channels, viewer-targeting. </li></ul><ul><li>For HDTV, application of MPEG4 AVC (H.264)/ VC-1 (WMV) coding, VDSL2/ ADSL2+ technologies or Fibre to the Home/ Building (FTTH/ FTTB). </li></ul>
<ul><li>Mobile TV </li></ul>2. Technologies - Mobile TV Broadcast to hand-sets (mobile phones, PDAs), notebook PCs, etc. Interactive and audio services. T-DMB (Terrestrial-DMB) Evolved from DAB. Allows video, audio and data to be transmitted to mobile devices. More efficient audio coding. Backward compatible with DAB audio (MUSICAM). DVB-H (Digital Video Broadcasting – Handheld) Tailored for transmitting multiple TV channels to mobile devices. Time-slicing technology conserves battery power of mobile devices.
3. HDTV and Economics <ul><li>* Chicken vs egg; (govt. + industry) vs consumers; content creation vs consumption; market size vs consumers’ costs. </li></ul><ul><li>* Economics: predictive of a rapid roll-out of costly digital HDTV. </li></ul><ul><li>AI (Affordability Index) </li></ul><ul><li>= Normalized (GDP * GDP-per-capita) (using PPP) </li></ul><ul><li>GDP --> size of economy --> strength for driving technology/ content creation. </li></ul><ul><li>GDP-per-capita --> consumer’s ability buy new devices/ contents. </li></ul>
3. HDTV and Economics <ul><li>Ranking of Major Economies, by AI </li></ul>15 Korea, South 3.9 7 AI* 4.0 6.8 9.8 22.7 66.2 100.0 *Normalized to 5.17E+17 (2005 est. data), i.e. 100. (E means “10 to the power of”). GDP: PPP (Purchasing Power Parity) based. Data source: The World Fact Book. Note: Shaded ones are in the Asia-Pacific region. 17 Australia 6 12 Canada 5 3 China, mainland (DMB-T/ H) 4 4 Japan (ISDB-T) 3 2 European Union (DVB-T) 2 1 United States (ATSC) 1 GDP Rank Economies AI Rank (2005)
3. HDTV and Economics <ul><li>AI (est. 2004 & 2005 Data) </li></ul>6.5 14 4.9 14 4.6 EU Spain 10 * Normalized to 4.71E+17 (2004) or 5.17E+17 (2005) respectively. 2.6 15 3.9 15 3.8 A-Pacific Korea, South 12 0 17 4.0 17 4.0 A-Pacific Australia 11 0 12 6.8 12 6.8 N. America Canada 9 14 3 9.8 3 8.6 A-Pacific China, mainland 8 -5.2 9 9.0 9 9.5 EU Italy 7 -0.9 8 10.5 8 10.6 EU France 6 0 7 11.2 7 11.2 EU United Kingdom 5 -2.8 6 14.0 6 14.4 EU Germany 4 -3 4 22.7 4 23.4 A-Pacific Japan 3 -0.5 2 66.2 2 66.5 EU European Union 2 0.0 1 100.0 1 100.0 N. America United States 1 GDP Rank AI* GDP Rank AI* Change in AI (%) 2005 Data 2004 Data Regions Economies AI Rank (2004)
3. HDTV and Economics <ul><li>Observations from AI (affordability index) data: </li></ul><ul><li>USA, Europe, Japan established DTT/ HDTV standards (ATSC, DVB-T, ISDB-T). China (mainland) has recently established a standard in Aug., 2006. AI of 9.8 seems to be the minimum threshold. </li></ul><ul><li>In Europe, the ranking order is Germany, UK, France , followed by Italy/ Spain . </li></ul><ul><li>For Europe, a wide-coverage technology such as satellites is beneficial (in fact, satellites are prevalent). </li></ul><ul><li>HDTV activity is most intense in economies with an AI index >= 3.8 (2004 data) or 3.9 (2005 data), approx. </li></ul><ul><li>AI ranking for the top economies has not changed a lot over 2004-2005. (For Hong Kong, AI = 1.7 (2004) and 1.8 (2005); synergy with mainland China is an important factor.) </li></ul>
3. HDTV and Economics <ul><li>Expanded List showing Rollouts </li></ul>Note: Shaded: figures not available; figures for EU are hard to find. (5 columns on the left: est. 2004 data.) Sets actually viewed in HDTV < “HDTV sets” ie HD-capable sets (probably less than 1/3). 21.7 6.1 13.8 49 3 52 15 Korea, South 3.8 12 13.7 5 7.3 20 1 17 17 Australia 4.0 11 13.1 40 39 14 Spain 4.6 10 10.0 3.6 12 33 1.2 15 12 Canada 6.8 9 330 1,306 121 3 China, mainland 8.6 8 21 58 30 9 Italy 9.5 7 23 61 23 8 France 10.6 6 5.8 2.3 24.3 60 1.4 19 7 United Kingdom 11.2 5 34.2 82 24 6 Germany 14.4 4 14.7 5.5 47.5 127 7 21 4 Japan 23.4 3 457 32 2 European Union 66.5 2 15.4 5.7 110 296 17 2 1 United States 100 1 HDTV sets / TVH (est. %) HDTV sets / capita (est. %) TVH (est. M) Pop. (est. M) HDTV sets (est. M) GDP/ capita Rank GDP Rank Economies AI* AI Rank
3. HDTV and Economics <ul><li>Factors: Accelerating HDTV </li></ul><ul><li>Other factors impact on HDTV rollout: regulatory, pricing, marketing, etc. </li></ul>Propelling Factor (HDF) = M (r,p,m,o)*(GDP*GDP-per-capita) <ul><li>For 0=<M<1 : retarding; For M>1 : accelerating </li></ul><ul><li>As (HDTV sets-per-capita, %) increases with HDF, hence </li></ul><ul><li>M is proportional to (HDTV sets-per-capita, %) divided by AI. </li></ul>where GDP is based on the PPP method, and (GDP*GDP-per-capita) = Affordability factor, M is a function of r egulatory/ p ricing/ m arketing/ o ther factors
3. HDTV and Economics Factors: Accelerating HDTV (cont.) Propelling Factor (HDF) = M (r,p,m,o)*(GDP*GDP-per-capita) HDF = (Ar * Ap * Am * Ao) * (GDP*GDP-per-capita) On breaking down function M : Strategic factors to foster HD development: Ar, Ap, Am, Ao
3. HDTV and Economics Factors: Accelerating HDTV (cont.) Ar – regulatory, mandating early rollout/ early cessation of analog TV, built-in digital tuners in TV sets, HD on-air quota, spectrum allotments, licensing regime, standardization; Ap – subsidies by governments/ operators, assisting viewers eg on HDTV STB; Am – Promotional/ marketing campaigns, to promote viewers’ awareness; Ao –leapfrog into HD (eg Canada and S. Korea, using ATSC, have achieved fast rollouts), adopting HDV/ low-cost EFP production, D-cinemas/ communal/ public viewing.
4. CD • DC Model D isplay C ontents (HD) D elivery eg. Terrestrial, IPTV , etc. Supply Consumption C ontents ( IPTV is just one more method for delivering HDTV but it is not affected by spectrum scarcity. IT technologies are used in the delivery process to connect the contents to the services.)
5. IP TV and Economics <ul><li>IPTV (HD, SD) and Economics </li></ul><ul><li>IPTV-HD is subject to the economics of HDTV. However, for IPTV-SD content production is less expensive than that of HDTV. </li></ul><ul><li>Consumer spending power is an important issue. ROI for the operators is critical. </li></ul><ul><li>The upgrading and roll-out of a high-bandwidth and scalable network is a major investment. Population density is an influencing factor. Is Hong Kong no. 1 ? </li></ul>Propelling Factor (IPTF) = Mi (r,p,m,o) * (GDP-per-sq. km) Equation applies to targeted cities, for IPTV-SD.
6. Mobile TV and Economics <ul><li>Mobile TV and Economics </li></ul><ul><li>Content production is far less expensive than that of HDTV. </li></ul><ul><li>Affordability is an issue : hardware and content costs, plus high functional obsolescence (short replacement cycles). </li></ul><ul><li>Terrain is an issue (HK being one example.) </li></ul>Propelling Factor (MTF) = Mm (r,p,m,o) * T * (GDP-per-capita) where T = Terrain factor, 0 < T =< 1. Terrain factor is technology (VHF, UHF, satellite) and frequency-band dependent, for targeted Cities.
7. Influencing Factors <ul><li>IPTV: no spectrum issues. </li></ul><ul><li>Other factors may also apply, such as consumer behaviour. </li></ul><ul><li>(H/ M/ L = high/ medium/ low impact) </li></ul>
8. Status of Digital Broadcast Technologies Sources : wilkipedia, internetworldstat.com, etc. USA, Japan, S. Korea > 200 Broadband Users USA, China, Japan > 1,100 Internet Users S. Korea (T-DMB) > 2.5 Mobile TV Hong Kong, France > 5 IPTV-SD USA, Japan > 30 HDTV United Kingdom > 5 DAB Main Areas Sets (in M), world-wide Technologies
9. Convergence, HK <ul><li>On digital broadcast technologies; not FMC. </li></ul><ul><li>HK: >67% broadband penetration, >131% mobile subscriber penetration, and >2M 2.5G/3G mobile users. Leading with >0.7M IPTV subscribers and high mobile penetration. Lots of potential. </li></ul><ul><li>Synergy with mainland China on DTT/ HDTV development: HK has one of the highest GDP/ capita and mainland China is near the top in GDP. HK can help accelerate HDTV roll-outs. </li></ul><ul><li>Chinese CMMB mobile standard uses STiMi for S-CMMB and T-CMMB (terrestrial gap fillers), 30-3000MHz. HK, with high rise buildings and rough terrain, is very challenging for mobile TV using wide-area transmission ie T-CMMB or DVB-H (unlike cellular 3G). FTA may be less problematic. </li></ul>
10. Summary <ul><li>TTT (Triple TV Technologies) and digital sound broadcasting developments are perplexing but interesting. </li></ul><ul><li>Techno-economic equations and an AI index have been introduced to enhance the understanding of world-wide developments. </li></ul><ul><li>Technological development and economics are closely related. Other factors such as regulatory, pricing, marketing and even terrain exert influences on growth. </li></ul><ul><li>Technological diffusion in broadcasting depends a lot on content and consumer behaviour; operators have to evaluate techno-economic and market factors in order to succeed. </li></ul>
“ HDTV Development” paper published (searchable on Google, Yahoo HK ), “IPTV Development” available in late Dec. 2006. ~The End~ Thank You! [email_address]
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