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tanszek:oktatas:techcomm:code

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tanszek:oktatas:techcomm:code [2024/09/16 13:34] kneheztanszek:oktatas:techcomm:code [2025/10/06 20:50] (current) knehez
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 The tool of encoding is code. A code consists of a finite set of symbols (an alphabet) and coding rules (groups of symbols). The tool of encoding is code. A code consists of a finite set of symbols (an alphabet) and coding rules (groups of symbols).
  
-A //code-word// is an elementary message, which consists of a finite number of symbols. The set of code symbols and the rules for forming codewords constitute the code's syntax.+A //code-word// is an elementary message, which consists of a finite number of symbols. The code's syntax is the set of code symbols and the rules for forming code-words.
  
-Encoding changes the form of the information, but other characteristics of the information remain unchanged. There are fixed-length and variable-length codes.+Encoding changes the information's form, but other information characteristics remain unchanged. There are fixed-length and variable-length codes.
  
 **Basic Types of Codes:** **Basic Types of Codes:**
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 $$ N = m^n $$ $$ N = m^n $$
  
-The fundamental problem of coding theory is the //preservation////security//, and //maximization// of the information content of transmitted messages.+The fundamental problem of coding theory is the preservation, security, and maximization of the information content of transmitted messages.
  
  
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   * **B**: -... (dash-dot-dot-dot)   * **B**: -... (dash-dot-dot-dot)
   * **C**: -.-. (dash-dot-dash-dot)   * **C**: -.-. (dash-dot-dash-dot)
-  * **SOS**: ... --- ... (dot-dot-dot, dash-dash-dash, dot-dot-dot) - a universal distress signal.+  * **SOS**: ... - - - ... (dot-dot-dot, dash-dash-dash, dot-dot-dot) - a universal distress signal.
  
 Example message: Example message:
   * **HELLO**: .... . .-.. .-.. - - - (dot-dot-dot-dot, dot, dot-dash-dot-dot, dot-dash-dot-dot, dash-dash-dash)   * **HELLO**: .... . .-.. .-.. - - - (dot-dot-dot-dot, dot, dot-dash-dot-dot, dot-dash-dot-dot, dash-dash-dash)
tanszek/oktatas/techcomm/code.1726493647.txt.gz · Last modified: 2024/09/16 13:34 by knehez