isem 3015 telecommunications and networking in business
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ISEM 3015 Telecommunications and networking in business. Traditional TV? Not portable Inconvenience Too big ……. Introduction to our topic: Mobile TV. Why we are interested on doing this topic?. Background Information on Mobile TV. - PowerPoint PPT PresentationTRANSCRIPT
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ISEM 3015Telecommunica
tions and
networking in business
12204552 Natalie,Wong Hiu Ying
12204013 Cherries, Cheung Chuk Ching
12200573 Andy,Lam Chuk Yat
12000248 Marcus, Kwok Hon Wing
12201855 Cm, Ngan Chiu Ming
12208108 Wilson, Siu Ho Tin
12203491 So Ho Ching Paul Joshua
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Traditional TV?
Not portableInconvenienceToo big……
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Introduction to our topic: Mobile TV
Why we are interested on doing this topic?
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Background Information on
Mobile TVThere are 4 possible techniques that operate the Mobile TV
They are:
I) OTT
II) CMMD
III)DTMB
IV)DVB
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I) Over the top
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Content of OTT
A) What is OTTBy Definition
By Comparison
B) Trend of Telecommunication – using OTT
C) Element of OTT
D) Application
E) Strength and Weakness
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A) Definition
Over-the-top content
Deliver multimedia content over the Internet
Using HTTP protocol
No multiple system operator being involved in the control or distribution of the content
Transmission speed and quality depend on internet connection
Generally, lower in cost than the traditional method of delivery
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Illustration
Content Provider
multiple system
operator Viewers
Content Provider
multiple system
operator Viewers
Internet
cable/satellite
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ComparisonTraditional Method OTT
Hulu or Netflix
Skype
Whatsapp, Facebook
Regular TV provider
long distance provider
SMS
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B) Major trend of telecommunication
The world is rapidly going mobile and broadband
The huge growth in video traffic, which is now five times larger than it was five years ago
More than 50 billion connected devices by 2020
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C) Elements of OTT
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Elements of OTT
a) Personal Device
b) Internet
c) Third Party
d) Platform for video delivery
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a) Personal Device
Personal device such as cell phone, iPad or computer
Enable us to watch the video by using such devices
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b) Internet
Internet : fundamental part of OTT
Without Internet : OTT can not be used
Example of Internet : Wifi, 4G,3G ,Home gateway
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c) Third Party
Provide the video through Internet
Example such as Now TV, TVB (MyTV)
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d) Platform of third party to provide TV
programVideo on Demand
Video assets are stored in video servers
severed when a user make the request in the from of IP unicast stream
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Video Server Centralized IP Edge
Distributed IP Edge
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D) Over-the-top(OTT) Application
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An over-the-top (OTT) application is any app or service that provides a product over the Internet and bypasses traditional distribution
Services that come over the top are most typically related to media &communication and are generally
Over-the-top Application
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Traditional distribution
• Without a multiple system operator being involved in the control or distribution of the content
• A multiple-system operator or multi-system operator (MSO) is an operator of multiple cable or direct-broadcast satellite television systems
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An online video distributor (OVD)
OTT content through internet-connected devices such as desktop and laptop computers, tablets, smartphones including iPhones and Android phones
set-top boxes such as Google TV smart TVs and gaming consoles such as the Wii, PlayStation 3 and Xbox 360.
Media & communication Using OTT
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E) Strength & Weakness
Content Delivery
Uses open internet, unmanaged network “open ecosystem”
Quality of Service (QOS)
No guaranteed, works under best effort conditions
Challenges
Low Quality, Non Premium Content No Live Broadcast
Benefits Low Cost, Flexibility of content consumption across devices , interactive
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II) CMMB
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DefinitionChina Mobile Multimedia Broadcasting (CMMB)
Mobile television and multimedia standard released in 2006
Developed by State Administration of Radio, Film, and Television (SARFT)
Using Satellite and Terrestrial Interactive Multiservice Infrastructure (STiMi)
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ComponentsUse different frequency bands for two transmission channels
S band for satellite
Frequency: 2.635-2.660 GHz
UHF band for terrestrial repeaters
Frequency: 470-862 MHz
Channel bandwidth can be modulated into either 8MHz or 2MHz
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InfrastructureSupport both terrestrial or satellite’s signal broadcasting
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General Application
Face to small-screen & handheld devices, e.g. mobile phone, PDA, MP4, digital camera
Provide mobile TV, comprehensive information & emergency broadcast services
Deployed in over 330 cities in China since 2008
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Applications in HK - UTV
Provided by China Mobile Hong Kong Company Limited (CMHKCL) in 2012
Own a 8MHz bandwidth license 678MHz-686MHz (UHF band)
7 hilltop transmitting stations 6 hired from TVB & 1 hired from ATV
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Applications in HK - UTV
Provide 8 Channels 2 for free
Transmit QVGA (320x240) video signal, lower than quality of VCD
HKTV bought CMHKCL by $104 million in 20/12/2013
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StrengthStable broadcasting
Suitable for small screen devices (mobile phone)
High coverage 95% HK region
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WeaknessLow resolution
Extra receiver is need extra cost
Provide fewer channels
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III) DTMB
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Component
What is DTMB?
Digital Television Terrestrial Multimedia Broadcasting
Signal frequency: 470-806 MHz
Bit-rate: from 4.813Mbit/s to 32.486 Mbit/s
Channel bandwidth can be modulated into 1.5MHz
Development: from only in-house to now outdoor with a small receiver
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Infrastructure
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General Usages
Traditional: Internal
Broadcasting TV signal
Fixed site: home TV
New Trend: External
Mobile devices
Built-in receiver:
e.g. Korean mobile
phone
External receiver:
HK mobile phone,
which is a new
technology
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Applications
Application in HK give 2 examples (inner/outer)
Foresee: More and more people would apply the skill on mobile TV (Outer)
Why?
-Much more convenience
- Mobile TV becomes more popular in Hong Kong
Inner Outer
TVB and ATV Mobile TV
Traditional TV A new way
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Strength
1. What are the reasons of using DTMB?
High resolution (max. 1080i)
Stable broadcasting (foreign)
2. Korea and Germany successfully broadcasted the
World Cup by using DTMB
(But, how about HK?)
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Weakness
A receiver is needed
Not suitable on mobile phone or tabs
Not stable broadcasting (in HK)
1. Immature skills
2. Signal is blocked by tunnel, tall buildings, etc.
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IV) DVB
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DVB – component
• Digital Video Broadcasting (DVB)
• is a suite of internationally accepted open standards for digital television
• It suits for TV and Mobile TV transmission
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DVB-H
• Digital Video Broadcasting• DVB-H Modulation Frequency OFDM(5,6,7,8 MHz)• mobile TV format • European Union’s preferred technology • mobile broadcasting on March 2008
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DVB in the world
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DVB-H application at present
• DVB-H has been a commercial failure, and the service is no longer on-air.
• Finland was the last country to switch-off its signals in March 2012.
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DVB application in Hong Kong
• In Hong Kong, digital terrestrial broadcasting services started since 31 December 2007
• EG: TVB, ATV• Planed to use DVB• Followed Chinese standard DTMB• Now DVB is not prevalent in Hong Kong
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DVB application in Hong Kong
The OFCA(Office of the Communications Authority) suggested The HKTV to use DVB-H for broadcast their TV channel
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Strength and Weakness
Strength
• Suitable for mobile device•High resolution
Weakness
• External receiver needed•Additional cost need as
receiver
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DVB-T2-Lite
• DVB-T2 is a new standard based on DVB• The GSMA Mobile World Congress • is a combination of the world's largest exhibition for
the mobile industry and a conference• 4K(3840×2160/4096×2160) available • is now testing 4k in Czech Republic
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DVB-T2-Lite
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Category CMMB DVB-H DTMB
Usage Mobile television Mobile television Terrestrial and mobile television
Modulation (OFDM 2/8MHZ) OFDM(5,6,7,8 MHz) OFDM(1.5MHz)
Resolution Low definition of 320p Up to 1080i Up to high
definition 1080iReceiver YES YES YES
Strength
• Stable broadcasting
• Suitable for small screen
devices
• High Coverage
• High video quality
• Stable broadcasting
• High video quality at fixed
locations• Higher
spectrum efficiency
• Faster channel synchronization
Weakness
• Low resolution • Provide fewer
channels • High start up
cost
• Unstable broadcasting - services prone
to interruptions during
commutate
Comparison between DTMB, DVB and CMMB
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Worldwide Digital Terrestrial TV Deployment
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China DTMB Deployment Landscape
The DTMB standard was ratified on Aug. 18, 2006, and became the mandatory terrestrial TV signal for Chinese broadcasters on August 1, 2007.
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Unstable Broadcasting
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Recommandation
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END
Thank You
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Q & A