HDTV SEMINAR

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WELCOME

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HDTV HDMI

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SEMINAR ON HD TV PRESENTED BY NIDHEESH CV ROLL NO:26 EL3,S5 REG NO:88040996

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HD IS DESCRIBED FROM THE LATE 1930s. HIGH DEFINISION TELEVISION . DIGITAL TV BROAD CASTING FORMAT. PROVUDES MUCH BETTER RESOLUTION THAN CURRENT TV. HD TV HAS 1 OR 2 MILLION PIXELS PER. HD HAS SUPERIOR RESOLUTION AND DIGITAL SURROUND SOUND. INTRODUCTION

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Why the Change to Digital TV ? IMPROVE THE QUALITY OF PICTURE AND SOUND. MULTICASTING. SUPPORT HDTV BROAD CASTS.

DTV formats:

DTV formats HDTV/SDTV Horizontal lines Vertical lines Aspect Ratio Frame Rate SDTV 640 480 4:3 60p, 60i, 30p, 24p SDTV 704 480 4:3 and 16:9 60p, 60i, 30p, 24p HDTV 1280 720 16:9 60p, 30p, 24p HDTV 1920 1080 16:9 60i, 30p, 24p Note: Non-integer formats ( eg . 29.97) omitted for clarity.

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Digital Television Quality Levels Standard Definition TV (SDTV) : - RESOLUTION OF 480i. SDTV is the basic quality display . Transmission in either the traditional (4:3) or wide screen (16:9) format. Enhanced Definition TV (EDTV) : - EDTV comes in 480p wide screen (16:9) or traditional (4:3) format. Provides better picture quality than SDTV. But not as high as HDTV. High Definition TV (HDTV) : - HDTV in wide screen format ( 16:9 ) Provides the highest resolution and picture quality Combined with digitally enhanced sound technology HDTV and digital TV are not the same . Resolution has 720p and 1080i

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DTV vs. HD TV

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DIFFERENCES B/W HDTV&OTHERS 1. AN INCREASE IN PICTURE RESOLUTION 2. 16:9 WIDESCREEN AS STANDERD 3. THE ABILITY TO SUPPORT MULTI-CHANNEL AUDIO SUCH AS DOLBY DIGITAL.

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HD TV HDTV has available in 2 types . INTEGRATED HDTV Which has a digital tuner, also known as an ATSC Tuner built in . If a station near you is broadcasting in HDTV, you can attach an antenna to an integrated set and watch the station in high definition. 2. HD-ready set Also called an HDTV monitor , which does not have an HDTV tuner. HDTV-ready sets often have NTSC tuners , so you can still watch analog TV with them. Your picture quality will still be better than on your old TV , but it won’t be high definition until you get an HDTV receiver .

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NOTATION HDTV broad cast systems are identified with 3 major parameters: 1.FRAME SIZE: In pixels is defined as number of horizontal pixels * number of vertical pixels. For example 1280 * 720 or 1920 * 1080 . Often the number of horizontal pixels is implied from context and is omitted, As in the case of 720p and 1080p

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NOTATION 2. SCANNING SYSTEM : Is identified with the letter “p” for progressive scanning . OR “ i ” for interlaced scanning .

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NOTATION 3. FRAME RATE : Is identified as number of video frames per second. For interlaced systems an alternative form of specifying number of fields per second is often used ..

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NOTATION-EXPLENATION 1920 * 1080 p 25 identifies progressive scanning format with 25 frames per second ,each frame being 1920 pixels wide and 1080 pixels high. The 1080 i 25 or 1080 i 50 notation identifies interlaced scanning format with 25 frames ( 50 fields ) per second, each frame being 1620 pixels wide and 1080 pixels high . The 1080 i 30 or 1080 i 60 notation identifies interlaced scanning format with 30 frames ( 60 fields ) per second ,each frame being 1920 pixels wide and 1080 pixels high . The 720 p 60 notation identifies progressive scanning format with 60 frames per second , each frame being 720 pixel s high , 1280pixels horizontally are implied .

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720p vs. 1080i . 720p signal is made up of 720 horizontal lines . Each frame is displayed in its entirety on-screen for 1/30th of a second . This is know as progressive scan (hence the 'p'). The quality is like watching 30 photographic images a second on TV. . A 1080i signal comprises 1080 horizontal lines but all the lines are not displayed on-screen simultaneously. Instead, they are interlaced (hence the ' i '), i.e. every other lines is displayed for 1/60th of a second and then the alternate lines are displayed for 1/60th of a second. So the frame rate is still 30 frames per second, but each frame is split into two fields , which your brain then puts together subconsciously.

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Screen Technologies Cathode ray tube (CRT) screens – traditional color television screens updated for digital Rear Projection TVs – rear projection TVs can create brilliant , wide angle pictures on ever-larger screens. LCD screens - are very thin and produce extremely clear pictures , but are currently expensive and limited in size Plasma screens - create a bright, clear picture up to enormous sizes while remaining very thin .

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Aspect Ratio 4 X 3: Traditional TV “aspect ratio,” that is, the screen’s width as compared to its height. For example, a “32 inch TV screen” would be 25 ½ inches wide and 19 inches tall . 16 X 9: “Wide screen” TV ”aspect ratio” that is more like a movie screen than a traditional TV. For example, a “32 inch TV screen” would be 28 inches wide and 16 inches tall.

Aspect ratios:

Aspect ratios

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COLOR OF HD TV One aspect of the HDTV that hasn’t receiver a naming standard is color . Until recently, the color of each pixel was regulated by three 8-bit color values , each representing the level of red, blue, and green which defined as pixel color. Together the 24 total bits defining color yielded just under 17 million possible pixel colors .

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COLOR OF HD TV Recently, some manufactures' have designed systems that can employ 10 bits for each color ( 30 bits total ) which provides for a palette of 1 billion colors . They contend that this provides a much richer picture .

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STANDERD FRAME OR FIELD RATES 23.976 Hz ( film-looking frame rate compatible with NTSC clock speed standards 24 HZ ( International film and ATSC High Definition material ) 25 Hz ( PAL,SECAM film, standard definition, and High Definition material) 29.97 Hz ( NTSC standard definition material ) 50Hz ( PAL and SECAM HD material ) 59.94Hz ( ATSC High Definition material . 60Hz ( ATSC High Definition material .)

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RESOLUTION DEFFERENCE HDTV has twice the linear resolution of SDTV . Thus showing greater detail than either analog television or regular DVD. The technical standard for broad casting HDTV also handle the 16:9 aspect ratio images with out using letter boxing or anamorphic stretching , thus increasing the effective image resolution .

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CONTEMPORARY SYSTEMS Components of a typical satellite HDTV system . HDTV monitor. HDTV satellite receiver. Standard satellite dish. HDMI cable, DVI-D and audio cables, or audio and component video cables.

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CONTEMPORARY SYSTEMS Besides an HD-ready TV set, other equipment may be needed to view HDTV. HDTVs have High Definition Multimedia Interface (HDMI) connections, which can transmit audio / visual signals to the TV with out compression .

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HOW TO GET THE SIGNAL 1. AN ANTENNA:- Depending on your location relating to the stations you want to watch, a set of rabbit ears might do, but you might need a roof top or attic antenna . You can buy an antenna that’s specially made for digital signals , but any reliable VHF/UHF antenna will work .

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HOW TO GET THE SIGNAL 2. CABBLE:- Keeping mind that digital cable is not the same as HDTV. You will need to check with your provider to determined to which packages include HDTV stations . You will also either need a set top cable box ore a cable CARD to allow your TV to receive and decode the cable signals.

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HOW TO GET THE SIGNAL 3. SATELLITE SERVICE:- As with cable, check with your provider to determine which place and stations use HDTV signals . You may need a deferent satellite dish and tuner to receive HDTV signals via satellite.

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Sun TV DTH Channels Reliance Big TV DTH Digital HD TV Digital HD TV Antenna Reliance India HD DTH Services in India

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BUYING A HD TV EDTV As You’re shopping, you'll probably see some Enhanced Definition TV (EDTV) sets. EDTV isn’t one of the digital broad cast formats it’s a description of the level of picture quality the set can produce. An EDTV set can produce better quality than SDTV , but it’s not an HDTV set. Most EDTV sets are flat-panel LCD or plasma sets .

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BUYING A HD TV When you start shopping, keep in mind that HDTV requires three parts . 1. A source , such as a local, cable or satellite HDTV station . 2. A way to receive the signal, like an antenna, cable or satellite service . 3. An HDTV set . Most people start with the set. You can choose, a) Integrated HDTV . b) HDTV Ready set.

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COAST OF AN HDTV Most television Manufactures make HDTVs in a variety of styles. You can buy HD in tubes, CRT rear projection, LCD, DPL, LCOS, and plasma. Prices range depending an picture size and technology used, but an average price gap is $500 for a small CRT monitor upwards to $20,000 for the latest in plasma technology .

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COAST OF HDTV SET Hitachi L37*01 37? Full HD LCD TV - RS 85,500/- Hitachi L42*01A 42? Full HD LCD TV -RS 88,500/- Hitachi P50*01A 50? Full HD Plasma TV -RS 168,800/- Hitachi P60*01A 60? Full HD Plasma TV -RS 420,800/- Samsung LN 40A550 Full HD LCD TV -RS 46,000/-

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QUESTIONS?.........

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THANKS