Explain block diagram of digital communication system?

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.