This document discusses various technologies related to advanced television systems and mobile devices. It covers mobile television, how it can be received through various networks. It also discusses digital video recorders and their functions like playback and search. Other topics include video projectors, their types and advantages, as well as technologies like Wi-Fi audio/video transmitters for wireless transmission of video and audio signals.

1. Unit 4
Advanced TV system

2. Mobile Television
•Mobile Tv usually means TV watched on small
handheld device.
•It may be pay Tv service broadcast on mobile
phone network or received free to air via
terrestrial broadcast or special broadcast in
mobile transmission format.
•Some mobile Tv can also download Tv shows
from internet including recorded Tv program &
broadcast which are downloaded .

3. Overview
•It is a service by which a mobile user watch a
Tv on mobile phone by taking the data
through existing network or propriety
network.
•Mobile Tv is largely divided into satellite DMB
(S-DMB) & terrestrial DMB (T-DMB).
•Although S-DMB has more content but T-DMB
has gained much popularity because it is free
& included as feature in most mobile handset
sold in country today.

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•S-DMB is hybrid version of digital multimedia
broadcasting S-DMB uses S-band (2.1-2.2GHz)of IMT
2000. & deliver around 18 channel at 128kbps.
•T-DMB is made for transmission on radio frequency
band III(VHF) & L(UHF) for terrestrial.
•Mobile TV is also available for consumer in India.
BSNL introduced this feature for its eastern 7 north-
eastern region in India. In 2007 ,it also launched a
mobile Tv application called isee.

5. Mobile Video System

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•There are different option available for
sending mobile video signal to mobile
telephone .
1. Terrestrial Broadcast
2. Satellite Broadcast.
3.Wireless Broadcast.
4.Cellular Radio Channel.

7. Application Of Mobile TV
Live Tv Application.
On Demand video Clips.
Video Ring Tones.
Interactive Video.
Video Surveillance for security.

8. IPod
•iPod is portable media player created &
marketed by Apple Inc.
•The Product currently consist of hard drive
based iPod ,touch screen iPod, compact iPod
Nano.
•Introduced on October 23, 2001 & released on
Nov 10,2001.
•First iPod had a 5 GB hard drive.
•The iPod memory is ranging from 2Gb to
160Gb.
•Steve Jobs said it would put, "1000 songs in
your pocket."

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•Apples iTunes software can be used to transfer the music
from computer to device.
•Since the release of the first iPod, Apple has released 3 new
iPods: the iPod Mini, the iPod Nano, and the iPod Shuffle.
•They have also released an iPod Photo and iPod Video.

10. New Style & New Storage
•As the new iPods were introduced, customers were
also given a choice of how large of a hard drive they
wanted. iPods now came in storage capacities from
512 MB to 160 GB.

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•iTunes Store introduced in April 29 ,2003 is an online
media store run by Apple & access through iTunes.
This store became an market leader for Apple for
creating more revenue.
•Apple announces sale of videos after 12th October
2005 & complete movies after 12th Sept 2006.
•Real networks said that apple is creating problem for
himself by using fairplay to lock user into using iTunes
store. Steve Jobs stated that Apple is making little
profit from song sale.
•Video games are also playable on various version of
iPod.
•iTunes 7 provides games like mini golf,Pac-Man,tertis

12. Other Competitors
Other companies That are competing
Scandisk, I River Clix .
creative Zen V.
Toshiba Gigabeat.
new Microsoft Zune.

13. MPEg-4 Video Player
•Mpeg-4 is a method of defining compression of
audio/Video digital data.
•It was introduced in 1998.
•MPEG-1 was introduced in 1991.
•MPEG-2 was introduced in 1995 for Digital Tv.
•MPEG-4 was introduced in 1999 for Internet Video.
•MPEG-7was introduced in 2002 for object
description.
•MPEG-21 was introduced in 2005 for DRM for
Protected media.

14. MP4 Player

15. Video Door phones
•Video door-phone (also known as video door entry or video
intercom) is a stand-alone intercom system used to manage
calls made at the entrance to a building (residential complex,
detached family home, workplace, etc.) with access controlled
by audiovisual communication between the inside and
outside.
•The main feature of video door entry is that it enables the
person indoors to identify the visitor and, if (and only if) they
wish, engage in conversation and/or open the door to allow
access to the person calling.
•There are two types of video door phones,
•1.Simple Door Phones.
•2.Wireless Door phones.

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•Door phones system performs a simple but
important function. Door phones allows anyone to
communicate safely with visitors without any need of
physical interaction .
•Some Door Phones come with remote control
enabling you to observe your front door from
anywhere in the house.

17. functions
1.Hands Free Communication: This Device provides
hand free communication between monitor &
intercom unit by pressing button on intercom you
can communicate with visitor.
2.Atomatic Display: When visitor press a bell
automatically its picture will be displayed on monitor.
You can safely identify the visitor before opening the
door.
3.Unlock Button: With an electronic door latch you
can open the door without going to the door by
pressing unlock button on monitor.
4. Night Vision: 6 Night vision infrared LED helps to
identify visitor during night time.

18. Structure Of Door Phone

19. Video Projector
•A video projector is an image projector that receives a video
signal and projects the corresponding image on a projection
screen using a lens system.
•All video projectors use a very bright light to project the
image, and most modern ones can correct any curves,
blurriness, and other inconsistencies through manual settings.
•Video projectors are used for many applications such as
conference room presentations, classroom training, and
concerts.
•In schools and other educational settings, they are
sometimes connected to an interactive whiteboard. In the late
20th century they were commonplace in home cinema but
later lost market share to large LCD television screens.

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•The history of projector is not so long, going
back in 1970s when 1st projector was came out
in the form of CRT projector.
•CRT projector has advantage of smoothly
displaying the picture but size and distortion is
there.
•The cost of device is not only depends on
resolution but also on light output.
•The light output is measured in lumens.
•For a room with less ambient required 1500-
2500 lumens of light.

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•There are 3 types of Projector
1.CRT
2.DLP
3.LCD
The Lumens output (brightness) good for LCD
is 800-1000 Also for DLP it is 1000. The
brightness should not be too high otherwise
poor reproduction of color will be there.

22. LCD Projector
•The construction of optical system used in LCD
projector is based on an image created using three
liquid crystal matrix LCD panel.
•As lamp produces a powerful light then a series of
colorful reflection of light is passed through filter and
lamps creates a white and multicolored reflection on
stream of light representing three primary
color(RGB).
•Each of these stream is concentrated at one of the
LCD panel & then passed through the lens.
•In this way signal of video source PC DVD is
displayed on screen placed in front of projector.

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24. Digital Light Processor
•This projector technology was developed by Texas
Instruments. It is completely Different from LCD.
•The DLP chip is made of thousands of microscopic
mirror. Each mirror represent the single pixel.
•Light From projector lamp is goes to the surface of
DLP chip. Therefore the mirror turn on/off so the
pixel will be on/off. The colors are generated through
color wheel.
•These DLP projectors making use of Three DLP chips
Each is representing RED,GREEN,BLUE.
•Usually 3 DLP Chips are used in Professional & Home
Theater System.

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26. advantages
•Filter Free Design.
•Light Weight.
•Higher Contrast.
•Less Pixilation.
•Smaller Than LCD .

27. Wi-Fi Audio Video Transmitter &
Receiver
•Wi-Fi operate at 802.11 IEEE standard with 802.11a &
802.11b.
•The standard employ OFDM use in DSL service & in
ISDB with various bands,modulation,bandwidth etc.
Standard Spectrum Maxm.Data
Rate
Typical Data
Rate
802.11a 5GHz 54Mb/s 25Mb/s
802.11b 2.4GHz 11Mb/s 5.5Mb/S
802.11g 2.4GHz 54Mb/s 24Mb/s
802.11n 2.4-5GHz 700Mb/s 100-210Mb/s

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•One of the great attraction of Wi-Fi is that with
digital connection any data can be transmitted
,including video.
•Microsoft media center Extender for Xbox is one of
the product.
•With wireless connection to PC running WMC, The
Xbox console can display video originating from PC
on TV Connected to Xbox.

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•Wi-Fi video Transmitter & Receiver provide an
analog Tv user to display the video without wired
connection.
•Using Mpeg compression technique or 802.11a unit
can deliver up to 350ft of range .
•The most accessible version of delivery is already
growing use of Wi-Fi connection to PC. Any PC with
wireless card can receive the video over internet. A
New Wi-Fi system Is also Called as Wi-Max promises
to enables connection range of at least few miles
from access point.

30. Hot-Spot
•2.4GHz Wireless Transmitter Set.
•30M Working Range.
•Near-HD Quality video & High Quality Audio.
•4 Channel for use with multiple Tx/Rx.
•Video Signal Format is NTSC/PAL.
•Transmitter Input: AV Composite( Red, White , Yellow).
•Receiver Output: Av Composite( Red ,White ,Yellow ).

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32. Digital video recorder
•A digital video recorder (DVR) is an electronic device that
records video in a digital format to a disk drive, USB flash
drive, SD memory card, SSD or other local or networked mass
storage device.
•The term includes set-top boxes with direct to disk recording,
portable media players and TV gateways with recording
capability, and digital camcorders.
•Personal computers are often connected to video capture
devices and used as DVRs; in such cases the application
software used to record video is an integral part of the DVR.
• Many DVRs are classified as consume electronic devices; such
devices are sometimes referred to as personal video recorders
(PVRs).

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•Different Types Of video Recorder are there
1.Hard Disk Based Digital Video Recorder.
2.Integrated TV set DVR.
3.VESA(video Electronic Association Standard)
Compatible DVR.
4.PC-Based DVR.

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•There are different option are provided on
DVR which helps us by following Ways,
1.Playback:After Pressing Play Button you can
see recorded videos.
2.Search:It will show us list of recorded files.
3.Firmware/Software Upgrade.

36. Application Of DVR
•TV Recording .
•Security.
•Hardware Feature.
•Software Feature.

37. PVR
•Everyone who subscribes to a digital cable or
satellite television service must have a receiver to
decode the digital television signal they receive
before they can view it on their television set.
•PVR’s, or Personal Video Recorders, are the
hardware/software which are built into many some
digital television receivers to record programming.

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•PVR’s allow users to pause and rewind live
programming, and to very easily record
programs using the electronic program guide.
•Once a program has been paused and
resumed viewers are no longer watching live
television; the PVR may then be used to fast
forward through the program until the viewer
catches up to the live timeline.
•Likewise, when viewing recorded
programming viewers may fast forward
through to the end of the recording.