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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

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

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