What is the difference between the image of TV

Question 1: What is the difference between the image system of TV This is a professional thing . You will know that we use the Chinese PAL system sound with DK. AUTO is automatic It can automatically adjust the system according to the signal There is no one good or bad argument.

Question 2: What are the types of TV sets now CRT traditional CRT TV: CRT (cathode ray tube) is a vacuum electronic device that uses electron beams emitted by an electron gun to excite phosphors. In the more than 100 years since its invention, its brightness, contrast, resolution, and color gamut have developed considerably, making it the most technologically mature television set available, and it is widely used in televisions and computer monitors for its excellent performance-to-price ratio. Its several factors such as good image quality (brightness and response speed) and low cost make CRT become the best competitive advantage of current color TV industry. However, relative to a variety of new FPD TV, due to the limitations of its imaging principle, the body shape is huge, difficult to make further breakthroughs in the display area, and gradually replaced by a variety of flat-panel TVs.

Liquid Crystal Television (LCD TV): Using a backlight source, that is, a fluorescent tube to project a light source, the light source passes through a polarizing plate and then through the liquid crystal material, resulting in a change in the arrangement of liquid crystal molecules, which changes the angle of the light penetrating the liquid crystal, thus changing the display on the liquid crystal panel to have a combination of different shades of color. Liquid crystal display through the electrode on the display screen to control the state of liquid crystal molecules to achieve the purpose of display, even if the screen is increased, its volume will not be a proportional increase in weight than the same display area of the traditional display is much lighter than that of the LCD TV weighs about 1/3 of the traditional TV. 30 LCD TVs than the old-fashioned CRT TVs are more energy-saving, but more than 30 more than that of the lack of more electricity, and the bigger the screen the more power consumption, and the more power consumption, the more power consumption. And the larger the screen, the more power consumption. LCD TV picture levels, color and real, large resolution, high clarity, display static picture effect is the best. LCD TV has a longer service life, the general life of the LCD TV for about 50,000 hours. However, there are still slower response speed, smaller viewing angle, poor color reproduction of pure black, manufacturing costs and other shortcomings. Suitable for bedrooms or rooms with a close viewing distance.

Plasma TV: The use of inert gas electron discharge, generating ultraviolet radiation to stimulate the coated red, green, blue fluorescent powder, presenting a variety of colored light spots on the screen. With a thin body, light weight, large screen, bright colors, clear picture, high contrast and brightness, fast response speed, small distortion, space-saving, play the best dynamic picture effect, etc. The emergence of PDP, so that the development of medium and large-sized (about 40 to 70) display application has produced great changes in its ultra-thin volume and weight is far less than the traditional large-sized CRT TVs, in the high-resolution, not affected by the magnetic field, wide viewing angle, the ability to display a wide range of colors, and the ability to display a wide range of colors, and the ability to display a wide range of colors. affected by magnetic fields, wide viewing angle and active light-emitting features over TFT-LCD, fully in line with the demand for multimedia products light, thin, short and small. However, there are still large power consumption, heat generation, not suitable for long time playback of static images, manufacturing costs and other shortcomings. Suitable for viewing distance of large rooms such as the family's large living room to use.

DLP micro-display TV: (Digital Light Porsessor): the light through the filter projected onto the surface of the digital microchip (DMD), the use of reflected light to produce images of the TV. DLP micro-display TV with high clarity, contrast and brightness uniformity is very good, stable picture quality, sharp colors; and can be arbitrarily zoomed, adjusted very easily. Microdisplay technology has been initially used in space and other high-precision categories, and then used in the commercial field.

Cinema TV: Positive projection TV, strictly speaking, is not a simple TV set, but an advanced TV system. The signal is transmitted to the projector through a wireless (or infrared) wide-band signal transponder, and the light projected from the projector shines on the screen, forming an image through the light reflected from the screen. It has a high contrast ratio and high resolution, which makes up for the lack of brightness to a certain extent; and has a freely adjustable screen, low power consumption and no radiation. Movie TV technology has become a useful complement to the display technology.

Projection TV: that is, CRT (Cathode Ray Tube) rear-projection TV, the input signal source decomposition to R (red), G (green) B (blue) three CRT tube fluorescent screen, in the high-pressure effect of the light-emitting signals will be amplified, will be converged, projected onto a large screen, through the light transmitted to produce images. Projection TV has the advantages of high clarity, bright colors, soft picture quality, and can last a long time, but it is difficult to enhance the brightness.

IPTV: that is, Interactive Network Television, which combines the Internet, multimedia, communications and other technologies in one, using broadband cable networks to provide home users with digital broadcast television, VOD on demand, video recording and many other broadband services. Users can enjoy IPTV service at home in two ways: (1) computer, (...... >>

Question 3: Why does the TV have an image The TV image is composed of luminous points, a certain moment only one or a group of scanning points of light flashing, and controlled by the signal strength of the light and dark, but due to the human eye's visual ephemeral function, the feeling is a picture. If you use a high-speed camera to shoot, you can distinguish the instantaneous points of light.

Question 4: What are the common video formats? 1, AVI, Audio Video Interleaved (Audio Video Interleaved) of the English acronym. AVI this video format published by Microsoft, in the field of video can be said to be one of the oldest format. AVI format call is convenient, good image quality, compression standards can be any sea to choose from, is the most widely used format.

2, MOV Mac friends should have more or less contact with QuickTime, QuickTime was originally used by Apple for Mac computers on a kind of image and video processing software. Quick-Time provides two standard image and digital video formats, that is, it can support static *.PIC and *.JPG image formats, dynamic based on Indeo compression method. MOV and *.MPG video formats based on MPEG compression.

3, ASF (Advanced Streaming format). ASF is MICROSOFT in order to compete with the current Real player to develop a file compression format that can be directly viewed on the Internet video program. ASF uses MPEG4 compression algorithms, compression rate and image quality are very good. ASF uses the MPEG4 compression algorithm, and the compression rate and image quality are very good. Because ASF exists as a video "streaming" format that can be viewed instantly on the web, it is not surprising that its image quality is a little worse than that of VCDs, but better than the RAM format, which is also a video "streaming" format.

4, WMV is an encoding-independent technical standard for real-time distribution of multimedia over the Internet, which Microsoft wants to replace technical standards such as QuickTime and file extensions such as WAV, AVI, etc. The main advantages of WMV are: scalable media types, local or network playback, scalable media types, prioritization of streams, and the ability to create and display video. types, stream prioritization, multi-language support, extensibility, and so on.

5, NAVI

If you find that the original playback software suddenly can not open the AVI files in this format, then you have to consider whether it is encountered n AVI. n AVI is an abbreviation for New AVI, a new video format developed by an underground organization called Shadow Realm. It is a modification of Microsoft's ASF compression algorithm (not AVI by any stretch of the imagination), and the only thing that video formats are looking for is compression rate and image quality, so in order to pursue this goal, NAVI improves on some of the shortcomings of the original ASF format so that NAVI can have a higher frame rate. In this way, NAVI is an improved ASF format that removes the characteristics of video streaming.

6, 3GP

3GP is a video encoding format for 3G streaming, developed to match the high transmission speed of 3G networks, and is one of the most common video formats used in cell phones today.

Simply put, this format is a multimedia standard developed by the Third Generation Partnership Project (3GPP) that enables users to enjoy high-quality video, audio, and other multimedia content on their cell phones. Its core consists of Advanced Audio Coding (AAC), Adaptive Multi-Rate (AMR), and MPEG-4 and H.263 video codecs, and most phones that support video capture support 3GPP video playback.

7, REAL VIDEO

The REAL VIDEO (RA, RAM) format has been positioned as a video streaming application from the very beginning, and can be considered the originator of video streaming technology. It can realize uninterrupted video playback in 56K MODEM dial-up Internet conditions, of course, its image quality and MPEG2, DIVX, etc. than is not to be complimented. After all, it takes a lot of bandwidth to transmit uninterrupted video over the Internet, and ASF is a strong contender in this regard.

8, MKV

A video file with the suffix MKV appears frequently on the network, which can integrate several different types of audio and subtitle tracks in a single file, and its video encoding freedom is also very large, it can be a common DivX, XviD, 3IVX, or even RealVideo, QuickTime, WMV, and so on. RealVideo, QuickTime, WMV. In fact, it is a new multimedia encapsulation format known as Matroska, this advanced, open encapsulation format has given me ...... >>

Question 5: Why does the TV have to play this picture when it doesn't have a program, and why doesn't anything else work? What is the special meaning of this picture? The colorful plate above is called "PM5544 TV test card (PM5544 TV test card clock)", and each of its components has a certain function.

First, the center of the large circle **** there are nine kinds of test and logo signals, from top to bottom in order:

1, the TV station label, said that the name of the TV station broadcasting.

2, black and white square wave, used to check the transient response of the brightness channel of the TV set.

3, the color signal, in the black and white square wave below the six color bars, which are arranged in the order of yellow, cyan, green, purple, red and blue. It allows TV viewers to have a general impression of the color, and use this to adjust the hue and color saturation, but also to check whether the TV's automatic achromatic circuit is normal.

4, white center crosshairs, black background on the white center crosshairs, horizontal white line line width of 1 line / field, *** two lines; vertical white line in the middle of 1, symmetrically distributed on both sides of 4, *** 6. Used to determine the center of the entire image, check interlacing and static convergence.

5, the standard time mark, in the clarity of the black rectangular block on the line sown with the Beijing standard time.

6, clarity line, 140, 220, 300, 380, 500 lines **** 5 levels. Located below the standard time in the large circle, use it to observe and adjust the sharpness of the TV, color saturation part of the bandwidth.

7, gray level, in the clarity of the line below, there is a gradual black to white horizontal band, it is the test band used to measure the gray level. This test band is divided into 6 levels according to the amplitude of the electrical signal, which can be checked to adjust the linearity and white balance.

8. TV station label display area.

9, round around the color signal test chart outside the left, right on the 15 squares, each with a certain brightness and color saturation values. Used to check the working performance of the color decoder.

Second, the two sides of the black and white rectangular border guard: used to adjust the line, field scanning amplitude and the center of the image. The aspect ratio of the test chart and the same color TV screen, is also 4:3, so it can be used to check the aspect ratio of the TV, the vertical border is used to check the synchronization of separation and clamping.

Third, the gray background white grid background in the border guard, in addition to the large circle graphics and round outside the rectangular color bar around the signal, are made up of gray background color on the white line square grid pattern. It has a horizontal direction of 13 frames, vertical direction of 17 frames, gray background brightness of black to white 30%, with which you can check the geometric distortion, nonlinear distortion, dynamic convergence and color purity and other characteristics.

Question 6: What is the meaning of that image shown when there was no TV signal in the previous TV station? Is the color bar signal, in the production and broadcast of television programs and equipment maintenance, the most commonly used than the color bar signal. This is because the color bar signal can correctly reflect a variety of color brightness, hue and color saturation, is the most convenient means of checking the quality of video channel transmission. Commonly used in several areas: 1, the electronic image of the television station before the start of broadcasting. 2, the video tape tape header recording 1min color bar: can be used to adjust the video recorder video channel gain, time delay, subcarrier phase and other parameters, so that the signal into the switching station with other signals to maintain consistency. 3, the camera built-in color bar generator: can be recorded at the beginning of the tape, can also be output for channel debugging. 4, used to synchronize the lock signal. Meaning: is generated by the machine color bar generator by the three primary colors, three complementary colors and black and white eight colors in accordance with the order of decreasing brightness, in order from left to right, vertical stripe standard test signal. White - yellow - green - green - pin - red - blue - black - red - blue - black

Question 7: What is the reason for the TV to open for a long time to have an image? The production tube is damp and needs to be warmed up for a period of time. It is recommended to go to repair it, it won't cost much.

Question 8: Why is the image picture on the TV much clearer than on the computer? What are the factors? Depends on the purpose for which they are designed and how they are viewed.

The TV specializes in moving images, while computer monitors specialize in static images and text.

And watching TV we sit farther away, not like using a computer is sitting in front of the monitor to hit the keyboard as close as some of the details of the defects can be ignored.

So, the same with a DVD player or watch a TV program, the effect of the TV is much better than the computer monitor.

And for the same game, if you set your monitor to the same resolution as your TV, even if you max out the game, it's still not as good as if you were playing it on a TV.

It's not as if the game is enhanced for PCs unless you play it at a higher resolution on a PC with full HD

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