Digital TV Inputs...

Busy with ISO audit preparation make me no time to open my blog...so today I will explain one by one about the Digital TV inputs...even not so details but I hope it can be a referance...:)

From the ranking before ;

1. HDMI input

- This is the latest input for Digital TV, combine together VIDEO & AUDIO this input allow us to watch our TV in the digital format. So that we can say this is the optimum level of the Digital TV input. Anyhow, in order to enjoy all the features please make sure your TV has this input...:)

- Why the picture so good using HDMI ; becoz there is no any data loss during data processing. So that, what ever data in your DVD it will directly transfer to the LCD or PLASMA TV without any resistance.

- Beside that, if we want to enjoy the HDTV picture HDMI is the best input to be use.

2. DVI input

- Exactly same with HDMI input but the only thing that DVI input don't have is AUDIO. Thats why the acronym is DVI... stand for DIGITAL VIDEO INPUT...no AUDIO there :) Maybe a bit difficult to find DVD player with this DVI input but most of latest PC or Notebook the DVI output will be one of the features.

3. VGA input

- Almost similar to DVI input, VGA input also not include with audio features. Anyhow, in term of brightness & color richness we can see DVI will has is better.

- Beside that, VGA input may has the frequency & phase noise while DVI input don't has this problem.

4. Component input

- Component input is one of the compulsory input for Digital TV and also compulsory output for DVD player.

- With 3 types of color ; HIJAU, MERAH and BIRU component cable will receive the data in SOG format (Sync On Green).

- These 3 different cable will bring 3 different colors.

* GREEN cable - carry the image with green color (normally the green cable size is bigger than the other 2 cables).

* BLUE cable - carry only BLUE color

* RED cable - carry only RED color

- Those color will be mix together when all the cables connected to the component input. This is the reason why, it is better than composite or s-video.

- Beside that using component input, we can watch the Digital TV with high resolution picture or normally say as PROGRESSIVE SCAN image.

5. S-Video input

- In easiest words I would like to say, S-Video quality picture is better than composite input. So we better see what composite input can give to us.
6. Composite Input
- The input jack with YELLOW, WHITE & RED.
* YELLOW is for VIDEO
* WHITE is for AUDIO ( normally left speaker)
* RED is for AUDIO (normally right speaker)
- Also known as CVBS input, composite input normally connected to the composite output from CD player, DVD player or ASTRO box. The picture clarity is OK but we will see some noise at the edge of the image...so that the we can see the image will not so sharp. In term of audio there is no any problem with it. It will totally same as others input. So if you still have CD player, you can use the composite input as option no 1.

7. Tuner Input

- As commonly known, tuner is use for broadcast system receiver and also commonly known that the broadcast system in Malaysia is an ANALOG system. So that, be a receiver or precisely say, pasive analog receiver tuner absolutely can't give excellent picture quality for the Digital TV.

- The reason is simple, during convert the analog data received by tuner some of that data will lost. Because of that, we can see lousy picture in Digital TV if we using tuner input to display our broadcasting channel.

- Well, in Malaysia to see better picture quality from our broadcast channel may be we need to buy ASTRO...:)

Digital TV input...ranking for picture quality

Minggu yang agak sibuk :) so kena curik2 masa menulis di sini...

Well just to add in some tips hows to get better picture quality with all the video input yg ada pd digital TV anda...so normally current digital TV will have;
1. Composite input - the input jack will have 3 colors : KUNING, MERAH & PUTIH
2. Component input - the input jack will have 3 colors too : HIJAU, BIRU, MERAH
3. S-Video input - this input looks like ps2 input (mouse or keyboard input connector at your PC)
4. VGA input - this input for PC input also known as ANALOG input.
5. DVI input - also PC input which also known as DIGITAL input.
6. HDMI input - latest video & audio input (High Definition Media Interface); signal format dlm DIGITAL.
7. Tuner input - using for broadcast TV system ( tk org2 yang tak ada ASTRO kat rumah la:) )

So from all the input list, kalau anda hendak mendapatkan kualiti gambar yang terbaik daripada digital TV anda...ranking nya adalah seperti berikut:

Input ranking - Top quality picture to low quality picture

1st : HDMI input
2nd : DVI input
3rd : VGA input
4th : Component input
5th : S-Video input
6th : Composite input
7th : Tuner input

So make sure you connect the best input that you have at your digital TV in order to get the BEST quality picture. If not you can't optimize your digital TV picture quality with wrong input connection ;)

Akan datang saya akan perjelaskan serba sedikit berkenaan dgn input-input ini...so c ya next week :)

The different between LCD TV & Plasma TV…

When choosing between LCD and PDP TVs, we’re actually selecting between two competing technologies, both of which achieve similar features and come in almost similar packages. Despite their similarities, the two technologies are very different in the way they deliver the image to the viewer.

Let we see the 1st difference between LCD and PDP TVs. As I explained before, plasma TECHNOLOGY consists hundreds of thousands of small cells which known as pixel. Then one pixel will consist of 3-sub pixels in red, green & blue color. These pixels allow electric pulses (stemming from electrodes) to excite rare natural gases-usually helium, xenon and neon-causing them to glow and produce light and then come out with 16 million different colors. Well, about the LCD technology, LCD panel was constructed by a matrix of thin-film transistors (TFTs) which supplies voltage to liquid-crystal-filled cells sandwiched between two sheets of glass. When hit with an electrical charge, the crystals untwist to an exact degree to filter white light generated by a lamp behind the screen (back light). LCD TVs reproduce colors through a process of subtraction: They block out particular color wavelengths from the spectrum of white light until they're left with just the right color. And, it's the intensity of light permitted to pass through this liquid-crystal matrix that enables LCD televisions to display images chock-full of colors-or gradations of them.

2nd difference between LCD and PDP TVs is about the CONTRAST RATIO. PDP technology has certainly achieved quite high contrast ratios, a measure of the blackest black compared to the whitest white. Nowadays, many plasma display manufacturers boast a contrast ratio of 10000:1 though our tests have not proven these numbers out. While LCD TV, by contrast ratio it is bit lower compare to PDP TV. Why? Because LCD utilize electric charges to twist and untwist liquid crystals, which causes them to block light and, hence, emit blacks. The higher the voltage passing through the liquid crystals in a given pixel, the more fully those crystals untwist and effectively block light - all of which makes these pixels darker. ADVANTAGE: Plasma
3rd difference is COLOR ACCURACY. In plasma displays, each pixel contains red, green, and blue elements, which work in conjunction to create 16.77 million colors. Insofar as each pixel contains all the elements needed to produce every color in the spectrum, color information was more accurately reproduced with plasma technology than it was with other display technologies. LCD technology has nearly caught plasma in gray scaling color accuracy. Plasma continues to exhibit more richness in color information and more natural coloration. Today, SMPTE color coordinates in top plasma displays still normally outperform those in LCDs, which tend toward over saturation. LCD TVs reproduce colors by manipulating light waves and subtracting colors from white light. This is an inherently difficult template for maintaining color accuracy and vibrancy - though most LCD displays manage quite well. While color information benefits from the higher-than-average number of pixels per square inch found in LCD televisions (especially when compared to plasmas), LCDs are simply not as impressive as plasmas with similar pixel counts. LCDs however, produce a typically brighter picture. Greens sometimes look over-green and reds can run a bit warm, but in a room with bright outdoor lighting, an LCD TV would be better then PDP TV. ADVANTAGE: Preference to plasma but depends upon room light, model & manufacturer.

4th difference is about VIEWING ANGLES. Plasma manufacturers have made much of their 170° viewing angles, which is about as good as horizontal and vertical viewing angles get. This owes to the fact that each pixel produces its own light, rather than light being spread across the screen from one central source. Hence, each pixel is more readily visible because its brightness is consistent with every other pixel on the screen. One consistent area of superiority of plasma viewing angles is demonstrated when viewing dark material content, especially DVDs. A Plasma display holds the black levels from off axis, while LCD TVs lose black level intensity more as the angle off axis increases. This usually occurs after around 90 degrees. Anyhow, LCD TV manufacturers have done much to improve their displays' viewing angles. The substrate material on newer-generation LCD models by Sharp and Sony has helped to expand those units' viewing angles, though they still have some ground to cover before catching plasma. Expect the best LCD HDTVs to have between 120 and 130 degree viewing angles. ADVANTAGE: Plasma
5th difference is about COMPUTER USE FUNCTION. The LCD flat screens display static images from computer or VGA sources extremely well, with full color detail, no flicker, and no screen burn-in. Moreover, the number of pixels per square inch on an LCD display is typically higher than other display technologies, so LCD monitors are especially good at displaying large amounts of data - like you would find on an Excel spreadsheet for example - with exceptional clarity and precision. For the same reasons, LCD TVs will also be a slightly better template for video gaming.
Plasma technology has increased anti burn in tactics as well as computer and static signal handling. There are still issues with each depending very much on the model and manufacturer. For example, most EDTV plasma displays do not handle a computer input well and product a very jaggy image when viewing static images from same. Users may want to consider a commercial version plasma if their application calls for a lot of computer use. ADVANTAGE: LCD

FAST-MOVING VIDEO PLAYBACK will give us the difference of no 6th between LCD & PDP TVs. Plasma gets the nod here because of their excellent performance with fast-moving images and high contrast levels. There are still some 2nd tier manufacturers whose plasma product displays some phosphor lag, a drag time in scenes changing from bright to dark. While the "response time" of LCD TVs has markedly improved in the last couple of years, they still suffer from a slight "trailer" effect, where the individual pixels are just slightly out of step with the image on the screen. During fast moving sports scenes, the most discerning eyes can detect this slight motion response lag. ADVANTAGE: Plasma

The 7th difference is about LONGEVITY. LCD television manufacturers claim that their displays last, on average, 50,000 to 65,000 hours. In fact, an LCD TV will last as long as its backlight does - and those bulbs can sometimes be replaced! Since this is nothing more than light passing through a prismatic substrate, there is essentially nothing to wear out in an LCD monitor. However, one nasty little known fact about LCD technology is that as the backlight ages it can change colors slightly (think of florescent office or house lighting). When this occurs the white balance of the entire LCD TV will be thrown for a loop and the user will need to re-calibrate, or worse, try to replace the backlighting or ditch the unit all together. Some of the early purchasers of larger LCD screens will be learning this tidbit in a couple of years. One thing that we need to know in this industry, it is not easy to find out whether the backlighting on LCDs can be replaced. Manufacturers are either hesitant to discuss the topic, or they just don't know. Plasma, on the other hand, utilizes slight electric currents to excite a combination of noble gases (i.e., argon, neon, xenon), which glow red, blue, and/or green. This is an essentially active phenomenon, so the phosphoric elements in PDP fade over time. Many manufacturers state a new half life of 60,000 hours. While a bit skeptical about this spec, I do believe strides have been made to nearly even the playing field with LCD. At half life, the phosphors in a plasma screen will glow half as brightly as they did when the set was new. There is no way to replace these gases; the display simply continues to grow dimmer with use. ADVANTAGE: Even, depending upon manufacturer quality.

We go to the 8th difference item, SCREEN BURN IN. LCD technology is not prone to screen "burn-in" or "ghosting" (premature aging of pixel cells) due to the nature of the technologies "twisting crystals." With plasma, static images will begin to "burn-in," or permanently etch the color being displayed into the glass display element. The time it takes for this to occur depends greatly on the anti burn-in technology of the manufacturer. Recent improvements by plasma manufacturers have certainly extended the time it takes to burn in a plasma pixel cell. In the past I was concerned to place a DVD on pause 15 minutes. Now, many of the enhancements such as better green phosphor material, and motion adaptive anti burn-in technology are greatly reducing the risk of burn in. It's gotten so much better that I don't even worry about it anymore. In a new model plasma from any top tier manufacturer I would put "ghosting" estimates at an hour or more now (Ghosting/burn in can be "washed" out by displaying static gray or white material). ADVANTAGE: LCD, though not as much a concern as it was a year ago.
No 9th is about the HIGH ALTITUDE. There is a reason LCD flat panels are the preferred visual display units for use on airplanes: LCD TVs aren't affected by increases or decreases in air pressure. Their performance is consistent regardless of the altitude at which they're utilized.
This is not the case for a plasma. The display element in plasma TVs is actually a glass substrate envelope with rare natural gases compressed therein. So, at high altitudes (6,500 feet and above), an air-pressure differential emerges, which causes plasma displays to emit a buzzing sound due to the lower air pressure. This noise can sound rather like the humming of an old neon sign. ADVANTAGE: LCD

Then for no 10th we must consider the PRODUCTION SIZE AND COST. All television measurements are stated in inches and are for diagonal measurement of the screen from corner to corner - not including framing. Both plasma and LCD TVs are becoming more readily available in larger sizes though plasma still leads the size battle by a great margin. Today, we can find 103” PDP TV in the market which is produced by LG or Panasonic. Though such mammoth monitors are expensive, they exhibit none of the "kinks" one might expect with such large displays. In other words, even the largest plasma displays are reliable. Large plasma displays will consume power - try 675 watts for a 65 "display compared to around 330 watts for a 42" plasma. The substrate material for LCD TVs has proved difficult to produce in large sizes without pixel defects owing to faulty transistors. ADVANTAGE: Plasma.

For rank no 11th the difference is POWER CONSUMPTION. Because LCDs use florescent backlighting to produce images, they require substantially less power to operate than plasmas do. LCD TVs consume about half the power that plasma displays consume. The reason: Plasmas use a lot of electricity to light each and every pixel you see on a screen - even the dark ones. Though plasma manufacturers have improved voltage consumption requirements a plasma TV will consume around a third more power for the same size display. ADVANTAGE: LCD

The last but not least, in rank no 12th we need to look at the PRICE AND RESOLUTION. LCD HDTV displays will have a higher resolution per same size comparison than plasma. The lowest resolution of a 40 inch LCD will be 1366 X 768 - easily full HD resolution in 1080i or 720p. A 42 inch HD plasma has a resolution of 1024 X 768. While this is not truly an HD resolution, it's close enough so that it's difficult to know the difference. A 50 inch plasma TV will have a resolution of 1366 X 768, while a 45 inch LCD displays 1920 X 1080 (1080P) resolutions. Those extra pixels and the production process of LCD HDTVs cost more money to produce. Expect to pay a third as much more for a similar size LCD TV than a plasma display. ADVANTAGE: LCD

An Introduction of LCD TV…

Previously I already explain a bit about PLASMA TV. So today I will talk about LCD TV. Well…almost similar to PLASMA TV, LCD TV is in the DIGITAL TV group. It’s very thin and light! Great to save space. It has a very good picture quality when in field of view. With latest LCD technology, LCD TV almost no static image burn-in problems. This is because the fluorescent backlight is filtered by the Liquid Crystal in solid state. About the life spend, LCD TV can perfectly work for 50,000 and 80,000 hours claimed by manufacturers. These last as long as the backlight can produce white light. The backlight can be changed out too! Beside be a TV for us to watch a movie, LCD TV is great for computer use too. Proven as most computers ship with LCD monitors. About the power consumption, LCD TV more economical and good for the environment. Why? Because LCD TVs use less power than Plasma TV's or CRT TV's, some cases more than half plasma TVs! So this is the good things about the LCD TV.
Now let’s take a look to the bad things of LCD TV. First, about the price. For 17” ~ 26” TV may be the price lower than PLASMA TV but when it available in larger sizes, they are more expensive than plasmas. Then about the picture quality, since LCD TV use of filters and a white backlight may reduce the quality of a true Red Green and Blue output. Blacks look more like dark grays because some of the white light always passes through. Beside that compare to PLASMA TV, LCD TV has a possibility for reduced angle of vision. As the white light passes directly through an LCD pixel (really through Red Green and Blue sub pixels) and the nature of polarizing filters, viewing angle is decreased. We will notice loss of quality for blacks and colors at angles greater 20 degrees off axis.
Next time I write more about the different between LCD TV & PLASMA TV….

Liquid Crystal Display (LCD)

A bit history & general info about the Liquid Crystal Display (LCD)...

1. Liquid crystal was discovered by the Austrian botanist Fredreich Rheinizer in 1888. "Liquid crystal" is neither solid nor liquid (an example is soapy water).
2. In the mid-1960s, scientists showed that liquid crystals when stimulated by an external electrical charge could change the properties of light passing through the crystals.
3. The early prototypes (late 1960s) were too unstable for mass production. But all of that changed when a British researcher proposed a stable, liquid-crystal material (biphenyl).
4. Today's Color LCDs have a sandwich-like structure
5. TFT LCD(Thin Film Transistor Liquid Crystal Display) has a sandwich-like structure with liquid crystal filled between two glass plates.

Bagaimana plasma TV menjana imej...

Kali ini saya akan menerangkan sedikit-sebanyak berkenaan dengan gas plasma dan bagaimana gas plasma ini mampu bertindak balas untuk menghasilkan imej yang jelas, terang serta tajam untuk kita lihat pada skrin plasma TV dan gambar di atas menunjukkan keratan rentas sebahagian daripada struktur plasma module yang dijadikan TV pada hari ini.

Secara umumnya gas plasma adalah terdiri daripada tiga unsur gas iaitu gas helium, neon dan xenon. Gas-gas yang diperangkap di dalam kaca ini (kaca merupakan lapisan luar kepada plasma module) mengandungi kandungan ion yang sangat tinggi. Keadaan ini membolehkan gas plasma boleh bertindak balas dengan elektron-elektron yang diujakan daripada panel-panel elektrod yang terdapat pada setiap sel-sel plasma atau sub-sub pixel menghasilkan sinaran ultra violet. Sinaran ini kemudiannya akan bertindak balas pula dengan fosfur berwarna merah, hijau dan biru yang melapisi sub-sub pixel untuk menjana warna merah, hijau dan biru yang terang. Proses ini akan dilakukan berulang-ulang dan ianya dikawal oleh enjin elektronik yang di pasang bersama plasma module untuk mewujudkan kadar kecerahan yang berlainan pada sub-sub pixel ini. Jadinya, dengan kombinasi tiga warna utama ini serta kadar kecerahan yang berubah-ubah inilah membolehkan plasma TV dapat membentuk kombinasi 16 juta warna. Hasilnya, walaupun dengan saiz yang besar imej yang di paparkan tetap terang, jelas dan tajam.

Apa itu plasma TV

Mungkin anda tertanya-tanya apakah sebenarnya plasma TV ini dan bagaimana ianya berfungsi. Sedikit informasi yang boleh saya kongsikan di sini adalah seperti berikut;
Plasma TV merupakan hasil daripada teknologi terkini yang kini menjadi salah satu produk terbaik untuk kita melihat paparan skrin rata yang boleh memaparkan imej yang besar dengan kualiti gambar yang menggagumkan , tajam serta jelas berbanding TV-TV konvensional yang terdahulu. Panel plasma ataupun plasma module sebenarnya dihasilkan daripada susunan sel-sel kecil yang dikenali sebagai pixel dimana pixel ini pula terdiri daripada 3-sub pixels iaitu merah,biru dan hijau. Pixel-pixel ini yang dilapisi dengan fosfur pada permukaannya kemudiannya akan bertindak balas dengan gas plasma yang berada di dalam plasma module untuk menghasilkan cahaya berwarna iaitu merah, biru dan hijau. Seterusnya, setiap pixel ini pula akan dikawal pelepasan cahayanya oleh program atau software yang telah diprogramkan di dalam enjin elektronik untuk menghasilkan 16 juta warna yang berlainan bagi menghasilkan imej yang cantik, jelas dan terang yang boleh dilihat pada skrin plasma TV yang hanya mempunyai ketebalan kurang daripada 6 inci. borak2flatscreentv