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Hdmi cables

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Hdmi cables

  1. 1. Jasjit Singh Jolly EEE-7th sem 0311324908
  2. 2. Existing cable schemes  Component cables: Analog interface. Three cables for video + 2 for audio.  Composite cables: Analog interface. One cable for video + 2 for audio.  DVI: Digital Visual interface. Uses single cable for video transmission but lacks audio channel.
  3. 3. HDMI  HDMI stands for High Definition Multimedia Interface.  It is an uncompressed, all-digital signal audio/video interface with 10 Gbps of available bandwidth. It contains 19 wires wrapped in a single cable. Uses HDCP technology for protection.  This new connection standard was developed by Hitachi, Matsushita, Phillips, Silicon Image, Sony, Thomson (RCA) and Toshiba
  4. 4. What is HDMI ? • HDMI provides an interface between any A/V source, such as a set- top box, DVD player, blu ray player, ps3, xbox etc or A/V receiver and an audio and/or video monitor, such as a digital television (DTV), over a single cable. • HDMI supports standard, enhanced, or high-definition video, plus multi-channel digital audio on a single cable. • Transmits all ATSC HDTV standards and supports 8-channel, 192kHz, uncompressed digital audio, all currently-available compressed formats & lossless digital audio formats with bandwidth to spare to accommodate future enhancements and requirements.
  5. 5. Supported signals:  Audio: LPCM, Dolby Digital, DTS, DVD-Audio, Super Audio CD, Dolby Digital Plus, Dolby TrueHD, DTS-HD High Resolution Audio, DTS-HD Master Audio, MPCM, DSD, DST.  Video: 480i, 480p, 576i, 576p, 720p, 1080i, 1080p,1440p, 1600p, 2160p, etc.
  6. 6. Typical Component Set-Up
  7. 7. Typical HDMI Set-Up
  8. 8. Pin diagram
  9. 9.  Pins 1 through 9 carry the three TMDS (transition minimized differential signaling) data channels, three pins per channel. Each channel has three separate lines for + values, - values, and a ground or data shield.  Pins 10 through 12 carry data for the TMDS clock channel, which helps keep the signals in synchronization. As with the TMDS data channels, there are separate lines for + values, - values, and a data shield.  Pin 13 is carries the CEC (consumer electronic control) channel.  Pin 14 is reserved for future use.  Pins 15 and 16 are dedicated to the DDC (Display Data Channel), used for communicating EDID (Extended Display Information data) information between devices.  Pin 17 is a data shield for the CEC and DDC channels.  Pin 18 carries a low-voltage (+5V) power supply.  Pin 19 is the Hot Plug Detect, dedicated to monitoring power up/down and plug/unplug events.
  10. 10. Transition minimized differential signaling (TMDS) is a way of encoding digital information so that it doesn't degrade as much as it travels down a cable. Digital signals are in binary form, meaning 1s and 0s. Electrically, a 1 is electricity flowing and a 0 is no electricity flowing. Digital binary signals generally travel better than analog signals, but they can degrade. It happens when the sharp drop in voltage from 1 to 0 becomes more of a slope. TMDS protects against this in two ways: - It reduces the number of times the signal switches between 1 and 0. - It carries the signal twice; once as the signal and the second time as the inverse of the signal. Since the receiver measures the difference between the signal and its inverse, it has a bigger gap to measure. TMDS
  11. 11. HDMI Signal Configuration
  12. 12. HDMI Versions Features: Version 1.0: Uncompressed audio and video over a single cable. Version 1.1: DVD audio output. Version 1.2: Super Audio CD output. Version 1.3: Bandwidth doubled to 10.2 Gbps. Version 1.4: Addition of a 100 Mb/s HDMI Ethernet channel. Support for 3D over HDMI. A Micro HDMI Connector.
  13. 13. HDMI Ethernet Current scenario for internet connection
  14. 14. Using HDMI Ethernet. It incorporates a dedicated data channel into the HDMI link, enabling high-speed, bi-directional networking at up to 100 Mb/sec.
  15. 15. What is HDCP?  High-bandwidth Digital Content Protection encrypts data over HDMI.  HDCP helps bring high-definition digital content to consumers by providing copy protection over HDMI
  16. 16. How it works
  17. 17. Disadvantages  Distance Limitations: HDMI cable is not suggested for long cable runs, due to twisted pairs of copper conductors that are small gauge.  Switching Delays: Sometimes, blank screens can be caused due to authentication delays. There can also be screen flashing errors.  Costly: HDMI cables are more expensive (per meter) than their analog counterparts.  HDCP Criticism: Many HDTV do not have HDCP. In future if keys are revoked signals will be degraded.
  18. 18. Typical HDMI uses
  19. 19. Thank You

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