hd tech final

8/2/2019 Hd Tech Final

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High Definition

The High definition Logo


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Agenda:What is HDMI?

History and Development of HDMI.

HDMI Architecture

HDMI signals

HDMI connectors

HDTVs

Advantages


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What is HDMI??

HDMI (high definition multimedia interface) isa standard for audio/video transmissionbetween a source and sinkover a singlecable.

HDMI support, on a single cable, any TV video

format including standard, enhanced and HighDefinition.

Provides a high resolution than the

conventional LCD televisions i.e. 1080 * 1920


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HDMI is provided for transmitting digital televisionaudiovisual signals from DVD-players, set-top boxes

and other audiovisual sources to television sets,projectors and other video displays.

The interface of the next generation.


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HDMI uses the TMDS-Transition MinimizedDifferential Signaling technique for theencoding purpose.

Standard on most new consumer A/Vequipment:TVs, DVD players, Blu-ray players, PCs

Cell phones (soon)

Latest specification is version 1.3a.


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History & Development

HDMI development was started by Hitachi,Panasonic, Sony, Philips, Thompson, &

Silicon Image in April 2002.The goal was to create an AV connector

which is backward compatible with the DVI.

Different versions HDMI have been

introduced, from HDMI 1.0 to 1.3a , samecable is being used but differentthroughput.


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VersionsHDMI 1.0: December 2002

Single cable digital audio/video

connection, maximum bandwidth of 4.9 Gbps.

HDMI 1.1: May 2004

With added support for DVD.

HDMI 1.2 : August 2005Added support for the audio channels up

to 8 channels.


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Versions with availability of HDMI

type A connector:HDMI 1.2a: December 2005

Fully specifies Consumer electronic

Control (CEC) features.

HDMI 1.3a: June 2006

With increased bandwidth up to 10.2Gbps.

Availability of a new mini-connector fordevices.


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HDMI vs DVI

Dell 24 Monitor Cine-tal 24 Monitor

DVI Display HDMI Display


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HDMI Architecture


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HDCPHigh bandwidth Digital Content Protection : an

authentication / encryption scheme used byHDMI/DVI.

HDCP is a specification developed by Intel

Corporation to protect digital entertainmentcontent across the DVI/HDMI interface.

The HDCP specification provides a robust, cost-effective and transparent method for transmitting

and receiving digital entertainment content toDVI/HDMI-compliant digital displays.

Implementation of HDCP requires a license fromIntel.


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HDMI Signaling

HDMI usesTransmissionMinimized

Differential Signaling(TMDS) to transmitthe information.

TMDS is way ofencoding the signalto protect it fromdegrading as the

signal travels from


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The sending device such as an HD-DVD player encodes the

signal to reduce the no. of transition between 0s and 1s.

The step of encodingstep helps protect the signal quality byreducing the no. of chance for the signal to degrade.


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One of the cables in twisted pair of cable carries the

signal itself and the other carries the inverse of that.

On the receiving end the device decodes & measuresthe differential between the signal and its inverse andcompensates for any losses.

1 1 1 1 0 0 0 0

0 0 0 0 1 1 1 1


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HDMI Connectors..

In the HDMI connector the pins are divided asfollows:Three audio and video channels travels through two pins

each, for the total of six pins.

TMDS clock travels through a pair of pins used tosynchronize the incoming data.

One pin for the CEC-Consumer ElectronicChannel

Hot plug detectionOne pin for the DDC-Display Data Channel,

carries the device info. and the HDCPencryption info.

Other channels carry data and electricity to


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Connectors

Socket


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The CEC Channel:

Consumer electronics control: shares controlinformation among all HDMI-connecteddevices.

Offers convenience features:One-touch play and record.

Automatic source switching

System audio control

Single line connected to all devices in thechain

Automatic address discovery


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Technology advancementVideo Cassette Recorder (VCR)

Compact disks (CD)

Digital Versatile Disk (DVD)Digital Audio Tapes (DAT)

High Definition Television (HDTV)


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Why HDTV?Higher resolution Picture

Wider picture

Real cinema experienceRS232 connectivity


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HDTVHDTVs are the digital ones.HDTVs have an aspect ratio of 16:9 so gives a

large & rectangle picture.

Higher resolution 1920*1080 pixels usingdeep color.

Signals can be progressive, faster refreshrates.


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Deep Color benefits (HighResolution)

Simulated low-bit color depth

Color

band

ing

Eliminates artifacts thatappear bands or contours.

Increases the contrast ratiosfor the sharper images &greater detail.

More accurate representsoriginal material.

-Deeper color palette producesvideo more like original film

-Live events look more natural

Simulated high-bit color depth

Simplified example of tonal transitions with limited color palette

Simplified example of tonal transitions with extended color palette


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Simplified example of tonal transitions with limited color palette

Simplified example of tonal transitions with extended color palette


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Real Cinema ExperienceA movie film is produces

with 24 frames/sec, whileis displayed @ 25frames/sec.

The result is not distorted

This type of artificial

intelligence is embeddedin FULL HDTVs.


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RS232 Connectivity

Including RS232 on our HD LCD TV provides a costeffective way of interfacing the Network family of LCD

TV Panels to an automation system controllerNEC Full HD LCD Televisions are suitable for

- Home Automation

- Display Signage applications


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HDMI Advantages

HDMI PROVIDES:

Simplicity

Performance

Intelligence


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Simplicity

Transmission of all types of Audio-Video dataon a single link.

Ultra easy to install or upgrade.

Simple to hook-up other devices to your HDSystem

HDMI is Backward compatible with theprevious versions of HDMI.


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PerformanceNo conversion or compression required.

Enormous Bandwidth Capacity gives:Better looking moviesFaster GamingRicher Audio

Ready for future emerging technologiesHigher resolutions, like 1440p or Quad HDFaster refresh rates, like 120HzDeep Color, taking the HDTV palette from

millions to trillions of colors


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IntelligenceSmarter connector: Allows the devices

communicate.

Devices connected are able to scan eachothers capabilities & configure the settings.

CEC Channel allows the user the one touchplay & record.

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