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Digital images are transmitted on computer networks by first compressing them to reduce their size. JPEGs are an example of compressed image files.
Wiki User
∙ 9y ago
Wiki User
∙ 10y agoDigital television is transmitted by using different frequencies from analog TV. The digital broadcast is sent on the previously used analog channel's frequency.
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What device converts text or images on an original document into digital data that can be stored and processed by a computer?
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Does A digital signal consists of a continuous electrical wave?
Digital signals are virtually always transmitted using a continuous (analog) waveform. Even a signal that is called "digital" is actually analog in practice. When a digital signal is transmitted over short range (inside an integrated circuit, on a computer motherboard, etc.) we talk about it being digital, but inspection of the actual waveform with an oscilloscope will reveal that it is not just two different voltage levels. But it is "mostly digital" and can be treated as such by circuit elements that are expecting digital signals. That is, we call it a "digital signal" but it isn't perfectly digital (two different values). It is actually theoretically impossible to transmit a pure digital signal. Doing so would require an infinite energy pulse to create the step functions. In practice, the limiter to making a signal that is almost perfectly digital tends to be the "load" and the transmission channel, which both have resistance, capacitance and inductance that make even a very abrupt signal smooth out a little. When digital signals are transmitted over relatively long distances, they are sometimes deliberately "encoded" onto an analog carrier. There are various methods for doing this, such as frequency modulation, amplitude modulation, phase modulation, or combinations. There can even be multiple layers of encoding to implement features such as error detection and error correction. So if you were to inspect the signal that is transmitted, you would see an obvious analog signal, but the information that is hidden in it is an encoded digital signal that will be re-formed at the receiver.
What is digitizer in computer graphics?
Digitizer converts analog or physical input into digital images. This makes them related to both scanners.
Why is digital technology preferred to analog technology in communications technology?
Why digital communications and what its advantages over analog communication ,first you have to know what is the difference between analog signal and digital signal. Analog signal analog signal is continuous time signal i.e. it has a value at any moment of time and it has infinite number of valus , such as dinusoidal signal ,you can substitute X with any value and you will have an value in Y in the follwing sin relation Y=sin(X). 1-Noise and destortion immunity:-when analog signal is transmitted in free space for long distances it will be distorted and no an ideal recovery done in receiver to recover the exact signal which transmitted ,but in digital communication digital signal consist of 2 levels only zero or one (not like the analog one , it has infinite numbers of values or levels at each period of time),so digital signal can be recovered easily and excactly like transmitted one. Hint : Device that used to pattially recover the analog signal after a certain distance is called repeater ,from its name it receives transmitted analog signal and filter it and amplify it and transmitt it),but in digital transmission it is different ,the device used for recovering digital signal which transmitted from acertain distance is called regenerative repeaters ,it receives transmitted digital signal and recover it to regenrate a new exact signal like received one then retransmitt it for further distance. 2-More privacy and security due to encryption. 3-Error detection techniques can be used and correction as well. 4-Easy for processing and applying multiplexing techniques. 5-Low cost. 6-Transmission rate can be changed easily. 7-Digital hardware implementation is flexible and permits the use of micrprocessors, digital switching elements and layer scale. Thanks for reading H.M.S
Who created the image scanner?
An image scanner optically scans images, printed text or handwriting and converts it to a digital image. It was invented by Ray Kurzweil.
What is the advantage of jpeg?
JPEG images (jpeg, jpg) use compression formats to reduce the data file size for digital images. While this causes a loss of image quality, it enables images to be more efficiently stored and transmitted.
How information is transmitted?
by analog to digital,digital to analog signal
Why is digital communication known as digital communication?
In digital communication message is to be transmitted in digital form. That is why it is called so .
What are the different sources of digital images?
Photographs and artwork are the initial sources of any images, including digital.
What is noise suppression in digital image processing?
removing noise from digital images. Noise is random color pixels which appears at digital images.
How is FM transmitted?
the digital signal is converted to analog signal after using by transmitted antenna
What devices are used for creating and editing graphic images?
For example digital computers to edit images, (digital) cameras to obtain images or computers to render them.
Why you change your analog signal into digital?
Analog is changed in to digital so it can be transmitted easily.
What is the definition of digital camera?
A Digital Camera Stores Images in a Digital Format unlike older cameras which used to store images on a film or metal plate...
digital media?
Digital media refers to any form of media content that is stored and transmitted in digital format. It encompasses a wide range of digital technologies, platforms, and devices used for creating, distributing, and consuming various types of content, including text, images, audio, video, and interactive elements.
How are digital images created?
Digital images are created using image processing software.
Where can one find free digital images online?
You can find free digital images online at lots of websites. Some of the websites where you can find free digital images at are Free Digital Photos, Wikimedia, Flickr, Morgue File, Stock Vault, Pic Drome, Pd Photo, From Old Books and Deviant Art.
