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How to select best flat-panel high-definition digital core - high-definition, television, black - HC Network Appliance Industry

 

  Shenzhen has just concluded its seventh China International Hi-Tech Fair, the variety of high-definition digital flat-panel TV shiny appearance, a high cross at one of the brightest stars; and has just opened in Beijing International Telecommunications Exhibition 2005, there are several paragraph definition digital flat panel TV related products appeared, causing the industry concern. For the general consumer, I am afraid we more concerned about how to buy a bed of roses source is high definition digital flat-panel TV.

Purchase of a good high-definition digital flat-panel TV key is to understand its core technology, know these, know why. It seems a general

Digital TV

The core technologies including the core processor and screen display system?? For flat-panel TV is that its screen, so two; and others to digital signal standards and optimization software interface as the other two core technologies. In fact, a good number of high-definition television, can not be separated in any of the four, they are at the core of digital television technology.

Standard digital signal

Digital signal is different from the analog signal, it is a message to the digital image and sound processing, coding, compression, encryption of signals with high bandwidth capacity, hard distortion, and good privacy. Internationally, the basis of the signal carrier can accommodate the amount of information on digital TV signal near-line classification, including the popular digital television (PDTV) or low-definition digital TV (LDTV), standard definition digital television (SDTV) and High Definition degree of digital television (HDTV) and other categories, which means often that the 480p, 720p, 1080i, 1080p and so on. Where, p on behalf of progressive scan, i on behalf of interlaced scanning, front of the figures represent the number of vertical scanning lines, Clearly, p better than i, the number of the better front. Select TV must pay attention to TV to support more and more digital signal input, or even high-definition signal input is not compatible, let alone high-definition picture quality of the show. HDTV support at least 1080i digital signal input.

Core processors

Core processor is the solution the received signal encryption, decompression, decoding and encoding, reducing the computing device, the processor. Recently, frequently appear in major media, "the letter Core" is a such a processor. Processor computing power, the stronger the better, of course, at present, some manufacturers still use the dual-processor TV products unit, thereby doubling the capacity to improve data processing in order to obtain better image expression. By the way, related to main memory and processor that

Memory

Is also important, at present, most of the TV are using high-speed DDR memory size 256M.

Optimization software interface

Optimization algorithm is run on the processor, the processing methods and procedures for digital television, they are very important. Digital signals can not be any image directly on the screen to be formed through the processor to restore effective control signal on the screen can show images, but the screen image has its own physical characteristics, in order to modify the control signal. The work must be completed in time for the screen display, while the results have to be amended to ensure, therefore, processor performance under certain preconditions, good algorithm can restore a more excellent pictures. For example,

Liquid crystal

Limitations due to physical characteristics of the screen with the imaging

Color

Number is limited, but the market saw one billion colors, more than 600 billion color is achieved by dithering algorithm. Generally, use the same screen

LCD TV

Differences in quality of their performance in the main by the optimization software interface developed by these various parts of the decision makers themselves.

Screen display system: LCD, plasma

Good television, there must be a good screen, the LCD TV

Plasma TV

As contrast, physical resolution, viewing angle, response time (LCD), are all determined by the screen. General terms, with a new generation of screen is often a big performance boost. This can often be easily noted. Support high-definition digital TV at least the physical resolution of 1024 * 768.

Four high-definition digital flat-panel decision of a common core technology

Taiwan Power Company

Is not as good high-definition digital flat panel. If the filter should be 11, not that require professional knowledge, is to find all the information is not easy Moreover, there are a lot of commercial confidentiality; to remind consumers that their hearts have a base to avoid being sinister businessman "Fudge" the. Last word: Do not look

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To see effects, shop around, since it is TV, is keep the "look", Nazan will rely on "see" distinguish good and bad.
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What is the difference between “The Digital Transition and High Definition Television?

Will we all have to eventually transition to HDT?

Since late 1940's, the television signals you can receive by putting up an antenna have been analog. Same as radio signals. We are talking channels 2,3,4,5,... on an old television.

Most of these CHANNELS have digital versions which newer TV's can deal with.

A "Converter box" for about $75 allows older TV's to pick up the new digital channels from an antenna. The antenna connects to the box, the box feeds analog on channel 3 or 4 to the old TV.

Thats the "Digital Transition".

The 1940's television standard is 480 lines of video per screen. This was enough to fill a nine-inch screen. But to remain backwards compatible - this standard could never change.

About year 2000 - after years of testing, debating, the government helped define 2 more video standards: 720 and 1080.

These are called High Definition.

If a TV station broadcasts these higher-definition signals, they are Digital. (we are not going to repeat the mistakes of analog with year 2000 delivery).

Does this help?

You have around your home right now:

- Analog TV signals for channels 2,3,4,... (standard def)
- New digital TV signals for channels 2,3,4 (standard def)
- New HD digital signals for channels 2,3,4 (720)

The first one is going away in 2009 and the frequencies will be given to Police, Fire, and some cell phone use.

The Beatles a hard days night (Digital Remaster 2009) [High Definition] HD