P5
Used to improve the accuracy of data sent over telecommunication and digital signal processing/methods also known as DSP is a group of various techniques. Removing irregularities caused by the transmission and therefore increases the accuracy of the data representing data electronically whereas this example would be data being sent over a network the DSP acts upon that signal which is for this reason.
They are so small they only have a single binary value where bits are the smallest unit of data used in computing for this reason where it may be 0 or 1. By following instructions or storing data. A byte is made from a large amount of bits. They can have a larger value and therefore store more data where bytes are a unit of used is computing where they contain several bits (8).
They are so small they only have a single binary value where bits are the smallest unit of data used in computing for this reason where it may be 0 or 1. By following instructions or storing data. A byte is made from a large amount of bits. They can have a larger value and therefore store more data where bytes are a unit of used is computing where they contain several bits (8).
Representing Data Electronically
Packet Structures They are transferred in this manner because this is the bandwidth of communication can be better and stronger between users when it comes to network communication where a packet is a unit of data which is carried across a network. Seen on the diagram is that packets have structures which contain different layers. This is where the DSP occurs to ensure that ensures that errors are removed which the data the user wants to transmit, also the trailer, which ensures that the data has arrived in the correct destination where they have a header, which is the data needed to ensure that the packet of information arrives at the correct destination, the middle section known as the payload. Error Detection Errors occur because of channel noise where error detection is a technique which is used to ensure the reliability of data. During the sending of data the irregularities in the signals occurs by this. Error Correction After the packet of data has been sent, since it is in the trailer of the structure and reconstructs the data and therefore ensuring errorless data has been transmitted where error correction occurs after the process of error detection has occurred. Bandwidth Noise Errors can be caused in all types of data, such as text and audio where noise is an unwanted electrical energy which decreases the quality of signals during transmission. By the user of the error detection and correction where the effect of bandwidth noise can be aided. Channel Types Telephone By electric signal conductors or by the user of radio signals where telephone communication is the transmission of speech over a distance which occurs by this. A bit stream of information sent from the transmitter to the receiver where they occur over the user of a radio channel which is this. Channel Types Microwave The length of the waves differ in size where microwaves are a form of electromagnetic radiation in which this is it. Multiple channels are also available and data is transmitted a high bandwidth where an advantage of the use of microwaves is that no cables are used in the transmission. Data Compression One of these been lossy where the file size decreases, as does the quality of the data such as an image where there are two different types of data compression. The data however, remains the same and the other being lossless. More data can be transferred quickly because of the size of the file because data compression makes files smaller this is often the meaning. |
Data Transfer Methods Synchronous Transmission To ensure that the transmitter and the receiver are in sync together where synchronous transmission is a method in which a sequence or data signals are sent accompanied by timing signals. Used in network protocols such as Ethernet for the data is sent in packets or frames for this. Asynchronous Transmission A bit character must be entered before each bit or is sent to inform the receiver when the transmission is finished where asynchronous transmission is the opposite of synchronous transmission since the data in this form of transmission is sent in spurts. In communication and especially in telephone lines where this type of transmission is used often. Correction and error detection. What Is Bandwidth? Through a single communication channel where bandwidth is a measurement of how much data can be transmitted. In bits per second where bandwidth is normally expressed in this. Gigabits of information can be transferred within a single second where modern networks now have the capability to transfer millions/billions of bits per second by this meaning. Noise and Bandwidth. Bandwidth Limitation The limit the speed of data transfer on a broadband internet connection bandwidth limitation, also known as a bandwidth cap are put into place by internet service providers. The higher the limit of data transfer therefore allowing for a faster into speed where the more the user pays the higher for their internet service such as fibre optic. Satellite A satellite is an artificial device which orbits the earth for the purpose of communication where a satellite can be for communications. They are fairly cheap and also cover a large area due to their position where the advantage of communication of satellites would be that they allow for high bandwidth. High Frequency (HF) Radio A high frequency this therefore allows for the quick transmission of data over a network, such as mobile phones where HF radio waves is a radio frequency in which the waves are between 3-30 Mhz. |