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Why inTV broadcasting video signal is trancemitted in AM but audio signal is in FM?
Wiki User
∙ 13y ago
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.
Wiki User
∙ 13y ago
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What does a broadcasting company do?
what does a broadcasting company do? well they manges TV or radio station, broadcasting is the distribution of audio and video content to a dispersed audience.
What is the difference between audio generator and signal generator?
Audio generator will produce some range of frequency and level of a test signal meant for audio. A signal generator will produce a test signal but is a more general classification. For example a audio generator is a signal generator. When you know what type of signal you are looking for, then a signal generator will be called that type of signal. all depends on what you are testing. examples: video -> video signal generator audio -> audio signal generator
Does an S Video cable also carry audio?
S-video is a two part video signal carrying luma and chroma signals (Brightness and color signals). There is no audio signal in an S-video connection so the audio will need a separate connection to operate.
How does a video amplifier work in tv broadcasting?
it extracts the video signal amplify it & sends it to picture tube for display.
How can you fight a failure to signal ticket when you DID signal and the officer admitted it on video?
ask for a copy of the video the video has audio so good luck with the fight :)
Does s video transmit audio?
S-video is a video connection that uses two wires, one for black and white information (The luma signal) and one for color information (the chroma signal). It does not carry audio but S-video inputs and outputs normally have a stereo audio connection associated with them.
What does the AV multi port on a camera do?
Outputs the Audio and Video signal.
How audio signal is processed in a digital video broadcasting system and how it is retrieved with respect to receive synchronized with video signal?
Audio in a broadcast production environment is handled in two different ways. Once captured, the audio signal is normally converted to a digital signal. It can be stored and pass through each stage of the signal chain as a separate signal or it can be imbedded into the video signal. There are advantages to either method Separate audio signals can be processed independently of the video signal so level changes, surround processing, equalization can all be carried out with ease. Separate signals of course, are not tied to the video signal. One of the possible consequences is that the timing can be changed compared to the video signal. To make sure this doesn't happen, the signal chain needs to have video and audio delay systems that can correct for processing delays. In some cases, the timing is handled by automated systems that measure or predict processing delays. In other cases, the delay is set manually to retain synchronization through a specific process. As video signals can pass through numerous processes, the timing can become complex. Each video process such as level adjustments, adding closed caption data each cause one or two frames of delay to the video signal. It can be beneficial to get the two signals combined as soon as possible. The separate audio signal uses a device called an imbedder to combine the audio signal and the video signal. The audio signal is fitted into the gaps in the video signal. In the days of analog video, the image was delivered in bursts of one line. Then there is a pause to allow the screen trace to return to the left hand side of the screen. Similarly, at the bottom of the screen, there is a longer pause to give time for the trace to return to the top of the screen. Digital video signals still use the same signal timings despite the fact that the signal timing is less important than it was in the analog days. The gaps in the digital signal are filled with small chunks of audio. There are sufficient gaps to allow up to 8 audio channels to be squeezed into an HD signal as well as other data such as closed caption information. Once the signal is part of the video signal, there is no need to worry about timing, nor the need to store and retrieve audio data with separate files. Because there are as many as 8 audio channels, there is also scope for separate soundtracks to e stored such as alternative languages. When the program is broadcast, the correct soundtrack needs to be selected. The final step before broadcast is to re-compress all the data into a data stream ready for transmission to the viewer.
When an av signal is sent via coax what divides that signal into two separate audio and video signals?
Frequencies. Audio is usually DC- to 20 khz. and the video portion is around 4.5 Mhz. in which, the audio is part of the 4.5 mhz. video TV signal, FM in nature while the video is AM. Then it's up to the TV's circuitry to separate the two components and send them to the proper circuitry to decode them.
Can a GV -HD700 record analog audio without a video signal?
It is possible to record audio into the Sony GV-HD700 with no video signal attached. You have to use the analog audio inputs. Since you are essentially recording a blank video signal along with the audio to DV tape, it is not a pratical way to record, and modern solid-state recorders are capable of much better audio quality than the HD700, which is limited to 16-bit, 48 kHz.
Audio Connectors?
Audio connectors and video connectors are electrical connectors for carrying audio signal and video signal, of either analog or digital format. Analog A/V connectors often use Shielded cable to inhibit radio frequency interference (RFI) and noise.
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.
