0
This is way simplified.
First - do you understand raster : the fact that the screen that you're looking at right now consists of about a thousand horizontal lines ?
If so, the theory is easy -
as the signal comes in the amplitude of that signal is translated into brightness of the current point on the line (for color - you have 3 brightnesses [red/blue/green])
The point moves back and forth, down and up, to cover the whole screen 30 times a second.
Wiki User
∙ 15y ago
Add your answer:
Earn +20 pts
Does a kv-36hs500 by Sony need a converter box?
Yes, this model will need a converter box to function after the digital conversion. I have the same television and called SONY to find out. The model has an analog tuner, therfore it requires a digital to analog converter box. This model is capable of high definition video quality because it has a picture resolution of 1080i. I am buying the Samsung DTB-H260F Digital Receiver for a converter box because it will provide the television with a high definition analog signal through the component video outputs. If you buy a lesser converter box it will only provide a 420i signal to the television even if an over the air high definition signal is available.
How do you send a signal through the VGA port on a laptop to the RCA yellow on a TV using the right cables when the laptop won't send out a signal lower than 800x600 are there downloadable programs?
To send a video signal from a computer to a television requires one of the following: A computer with a composite video card installed. (A laptop will not have one.)An S-video output jack. (This accepts a round, multipin plug; many laptops have this.)A converter box for converting the SVGA signal to something else that a television can handle, such as composite video, S-video, or component video. (Such boxes are available at Radio Shack and elsewhere for about $100.)The computer's VGA (SVGA) video output and the television's composite-video (RCA yellow) input are so different that there is no simple cable conversion. There is no software that would cause the computer to output analog NTSC video onto the VGA port.No. That may be a hardware limit. You might try and start your laptop in VGA mode to get to 640 x 480
Your jcv tv has no picture but sound?
If JVC TV has no picture but only sound, there may be a problem on the signal board. Contact an authorized service center to arrange for estimate of repair.
What is the difference between analog and digital recording?
Although over 50 years old, the standard television signal is still one of the most common way to transmit an image. Figure 23-9 shows how the television signal appears on an oscilloscope. This is called composite video, meaning that there are vertical and horizontal synchronization (sync) pulses mixed with the actual picture information. These pulses are used in the television receiver to synchronize the vertical and horizontal deflection circuits to match the video being displayed. Each second of standard video contains 30 complete images, commonly called frames. A video engineer would say that each frame contains 525 lines, the television jargon for what programmers call rows. This number is a little deceptive because only 480 to 486 of these lines contain video information; the remaining 39 to 45 lines are reserved for sync pulses to keep the television's circuits synchronized with the video signal.Standard television uses an interlaced format to reduce flicker in the displayed image. This means that all the odd lines of each frame are transmitted first, followed by the even lines. The group of odd lines is called the odd field, and the group of even lines is called the even field.
Why sound comes before picture in tv?
Sound and picture are transmitted on separate cables for Cable TV providers.
How does a video amplifier work in tv broadcasting?
it extracts the video signal amplify it & sends it to picture tube for display.
How effective is a cable TV signal booster in terms of picture quality?
TV signal boosters will significantly improve the picture quality of your TV if the poor quality you are currently experiencing is due to signal degradation. If the cable signal is poor from the source, a signal booster will not help.
What is video encryption?
Video Encryption is a method of preventing a video signal from being viewed unless you have the ability to decode the signal. Older methods dropped the video interlace which caused a picture to roll or skew. Newer methods change the video image so that it is scrambled and unreadable unless processed with the decryption key. Since the signal must be decrypted on each frame, this has to be done 60 times per second (in the U.S.) and 50 times per second (in Europe). This requires hardware decoding because software cannot decode the entire picture image fast enough. Satellite Television providers typically use two methods: they change the encryption key on a regular basis, and they send a disable signal to a receiver device when the subscription ends, which invalidates its stored keys and it can't read the signals.
How does the separation of sound and picture in television occur?
Originally the television was sent in the form of a type of side band transmission. The picture was sent on half of the signal and the audio was sent on the other side of the signal. We do not have room to go into the theory of sideband transmission here. Anyhow Since the two parts are sent in a way analogous to a car pulling a small trailer, it is as if electronic devices unhooked the trailer. Picture the video part as the car and the sound as the little trailer. The video goes to the monitor and the sound to the speakers.
Why doesn't a digital TV with a digital tuner get a digital picture?
The signal sent to the TV must be a digital signal as well.
What gives better picture RCA or cable?
An RCA cable with composite video is better than standard definition cable. An RCA cable set (3 cables) can also carry a component video signal, which can be Hugh definition up to 1080p. Cable television can also carry a high definition signal if you have a HD cable box or a TV with a digital tuner. For connecting a VCR, an RCA composite video cable will give a better picture than the RF antenna cable.
What is the difference between a coaxial and audio video cable?
A coaxial cable sends all signal down one line. All the color, brightness and audio is piped together to the television, where a signal converter is required to separate all the information to be displayed on screen. An audio/video, or RCA cable (Red-White-Yellow), separates the signal into three parts, video, the left audio channel, and the right audio channel. The TV then has to only convert the video signal into the colors and brightness. Since the audio is already separated from the video with the audio/video cable, there is one less conversion needed at the TV. This allows for better picture quality with audio/video cables. To put a number to it, audio/video cables give 20% better quality signal that coaxial. S-video is even better as is separates the video signal into color and brightness. Component is better yet, as it separates the colors from each other (Red, Green, Blue) and sends the brightness with the green signal. These are all analog methods of providing a television with signal. Digital methods like DVi and HDMI provide the best signal quality of all.
Will a 1080p signal work on a 1080i tv will it downconvert?
1080p signal may not work on a 1080i TV set. You may not get a picture, but just a blank screen. And that blank screen will not let you undo the changes because you cannot see anything on the screen. In this case, you may have to make an analog connection, such as a composite video connection, to your TV set just to undo the changes you have made. Or you have to press a combination of buttons on the 1080p signal source to restore the picture. I suggest you read the documentation that came with your 1080p signal source.
Why inTV broadcasting video signal is trancemitted in AM but audio signal is in FM?
AM was used for the video signal because components to transmit and receive the video signal (tubes, originally) were not available that could modulate the frequency fast enough for the amount of information required for a video signal. The VHF band, where most of television broadcasts resided until the the adoption of Digital Television (DTV) was also being used for FM audio broadcasts.
Where does the cable TV signal go to on your new led TV?
The cable comes out of the wall to the HD converter box and the converter box connects with the HDMI or video cable to the same on the tv set. If the tv has HDMI connector use it. HDMI will give you much better picture than video cable connections.
What are the main parts and functions of Television set?
A television is a reciever just like a radio. Radio recieves audio signal where as television recieves both audio as well as video. 1. Demodulator: The basic requirement of a reciever is a demodulator. In the transmission side, the audio/video signals are placed on a carrier signal to make it travel long distance. For example, we take train/ bus to travel long distance since we do not have enough energy to travel by walk. Similarly the signlas are too weak to travel long distance. So we do a modulation to transmit it long distance. A demodulator seperates the audio/video signal from carrier signal. 2. Amplifies: The signals cannot be used as such to drive the speakers or picture tube. So they need to be power amplified to drive the television. There are Seperate amplifiers for audio and video. 3. Speakers: To reproduce the sound we need the speaker. The demodulated audio signal is power amplified and fed to the speakers. Modern day television has much more Signal processors to improve the audio quality. 4.Picture Tube: Picture tube is also known as cathode ray tube. This has a phosporus coated display which produces illumination when electrons impact on them. The picture is reproduced by controlling the electron gun(which produces ray of electrons). 5. And finally power supply unit.
What is the function of HDMI port?
HDMI is a video output standard. It is often used to connect to a monitor or a tv. It carries a high definition video signal as well as an audio signal so you dont have to hook up more than 1 cable if your monitor/tv has built in speakers.
