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ADVANCED DIGITAL TV :OVERVIEW

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ADVANCED DIGITAL TV :OVERVIEW

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This PPT is Of the Audio Video Engineering Subject of BE E&Tc As Elective Subject. This Subject also there in Diploma E&Tc at Third Year. The PPT is Prepared by taking help of Different books and websites.

This PPT is Of the Audio Video Engineering Subject of BE E&Tc As Elective Subject. This Subject also there in Diploma E&Tc at Third Year. The PPT is Prepared by taking help of Different books and websites.

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ADVANCED DIGITAL TV :OVERVIEW

  1. 1. Unit 4 Advanced TV system
  2. 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. 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.
  4. 4. Continue… •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. 5. Mobile Video System
  6. 6. Continue… •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. 7. Application Of Mobile TV Live Tv Application. On Demand video Clips. Video Ring Tones. Interactive Video. Video Surveillance for security.
  8. 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."
  9. 9. Continue.. •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. 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.
  11. 11. Continue.. •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. 12. Other Competitors Other companies That are competing Scandisk, I River Clix . creative Zen V. Toshiba Gigabeat. new Microsoft Zune.
  13. 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. 14. MP4 Player
  15. 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.
  16. 16. Continue.. •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. 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. 18. Structure Of Door Phone
  19. 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.
  20. 20. Continue.. •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.
  21. 21. Continue.. •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. 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.
  23. 23. Continue..
  24. 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.
  25. 25. Continue..
  26. 26. advantages •Filter Free Design. •Light Weight. •Higher Contrast. •Less Pixilation. •Smaller Than LCD .
  27. 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
  28. 28. Continue.. •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.
  29. 29. Continue.. •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. 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 ).
  31. 31. Continue..
  32. 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).
  33. 33. Continue.. •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.
  34. 34. Continue.. •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.
  35. 35. Application Of DVR •TV Recording . •Security. •Hardware Feature. •Software Feature.
  36. 36. 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.
  37. 37. Continue.. •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.

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