Archive for the ‘Notes’ Category

  • Backbone Networks

    Jun 21, 13 • 4540 Views • Notes • • 6 Comments

    The backbone network networks have been categorized as the – bus network topology A bus network is the type of network in which a particular set of the stations or workstations are connected all together through the communication channel that can be

  • IMAGE COMPRESSION

    Jun 21, 13 • 3427 Views • Notes • • 2 Comments

    IMAGE COMPRESSION When the large amount of data is stored in a space is known as image compression. It is of two types Lossless compression Lossy compression LOSSLESS COMPRESSION: It is a reversible process No information is lost It is useful for text data

  • Optical Sources – LED and Laser Diodes

    Jun 21, 13 • 3658 Views • Notes • • 3 Comments

    Optical Sources – LED and Laser Diodes LED STRUCTURE – They can be seen glowing green, yellow or red in vehicles, telephones, cameras. – They are inexpensive and highly reliable light sources. – The LED used in optical communications

  • Television Standards and broadcast channel

    Jun 21, 13 • 2880 Views • Notes • • 1 Comment

    Television Standards: A number of Television standards now coexist the worldwide. It also offers detail listings of standards prevalent in various countries.Television broadcast commenced approximately 50 years ago. The knowledge gained over the years has

  • Composite Video signal and Component video

    Jun 20, 13 • 6286 Views • Notes • • 1 Comment

    Composite Video signal:: The composite video waveform contains all the information needed for complete CRT picture, line by line and field by field. The signal is used in picture tube to reproduce picture on the scanning raster. The composite video consists