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Basics of Communication
Duality
- Source coding : improve efficiency by reducing redundant bits
- Channel coding : improve reliability by adding redundant bits
Examples of Source coding
CCITT standards → speech(telephony), audio(CD, DAT, MD, DCC, DVD, DAB, MPEG, MP3), still images(JPEG), moving images(MPEG).
Terms:
(InterProcess Communication) The exchange of data between one program and another either within the same computer or over a network. It implies a protocol that guarantees a response to a request. Examples are OS/2's Named Pipes, Windows' DDE, Novell's SPX and Macintosh's IAC.
Semaphore: A shared space for interprocess communications (IPC) controlled by "wake up" and "sleep" commands. The source process fills a queue and goes to sleep until the destination process uses the data and tells the source process to wake up.
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What is the scope of digital communication?
Digital communications has a lot of scope in our life . For example, all the cellular networks,internet and other advanced communication systems are based on digital technology. So, there are a lot of companies growing in this sector.Today, fast and cheap communication has become the demand of public and thus there is a huge competition between companies to sustain in the market.
What are the disadvantages of analog communication?
Disadvantage of Analog Communication: 1)Analog Communication systems are costlier than digital communication system. 2)Less Security in Analog Communication 3)More prone to noise interference.
What are the Advantages of analog and digital communications?
Disadvantage of Analog Communication: 1)Analog Communication systems are costlier than digital communication system. 2)Less Security in Analog Communication 3)More prone to noise interference. Advantage of Analog Communication: 1)Transmission bandwidth required is less. 2)No need of synchronization. Advantage of Digital Communication: 1)Digital Communication systems are simpler and cheaper. 2)Using data encryption only permitted user are allowed to detect the transmitted data. 3)Since in Digital Communication, channel coding is used, therefore a large amount of errors may be detected 4)Since transmitted signal is digital in nature,large amount of noise tolerance may be tolerated Disadvantage of Digital Communication: 1)More transmission bandwidth required. 2)Digital Communication needs synchronization in case of synchronous modulation.
What is function of pulse switch in digital training system?
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communication system are concerned with the transfer of data and information from one location to another
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digital coommunication is a mode of communication where the information is encoded digitally as discrete signals & electronically transferred to the recipients. analog communication format is that in which information is transmitted by modulating continuous signal, such as sound wave.
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If an organization is planning to change a new system explain the New trends in information and communication technology?
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What are the capabilities of digital communication systems?
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What is the scope of digital communication?
Digital communications has a lot of scope in our life . For example, all the cellular networks,internet and other advanced communication systems are based on digital technology. So, there are a lot of companies growing in this sector.Today, fast and cheap communication has become the demand of public and thus there is a huge competition between companies to sustain in the market.
What is Block diagram of electrical system?
a Block Diagram usually means that you draw the main components of a circuit/system with boxes *pretend / means in a box -/amplifier/-->/Analog to Digital Convertor/-->/Output/ a Block Diagram usually means that you draw the main components of a circuit/system with boxes *pretend / means in a box -/amplifier/-->/Analog to Digital Convertor/-->/Output/
