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4B/5B Encoder line - Codificador de Linea 4B/5B 1.0

  Date Added: May 28, 2013  |  Visits: 294

4B/5B Encoder line - Codificador de Linea 4B/5B

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Codificador de linea 4B/5B escrito en Matlab, presentado en un GUIDE, codifica longitud sin restriccion y presenta el espectro de la senal.4B/5B Encoder line written in Matlab, presented in a GUIDE, unrestricted length encoding and presents the spectrum of the signal.No tiene restricciones en la longitud de la senal, y presenta el espectro.En telecomunicacidoDln, 4B5B es una forma de cdoDldigo de ldoTsnea de comunicaciones de datos. grupos de mapas 4B5B de cuatro bits en grupos de 5 bits, con una densidad mdoTsnima de bits 1 en la salida. Cuando NRZI-codificado, el 1 de ellos permiten transiciones necesarias reloj para el receptor. Por ejemplo, una racha de 4 bits por ejemplo, 0000 no contiene las transiciones y los problemas que causa el reloj para el receptor. 4B/5B resuelve este problema mediante la asignacidoDln de cada bloque de 4 bits consecutivos una palabra equivalente de 5 bits. Estas palabras de 5 bits estdodAn predeterminados en un diccionario y son elegidos de forma que habrdodA al menos dos transiciones por bloque de bits.In telecommunication, 4B5B is a form of data communications line code. 4B5B maps groups of four bits onto groups of 5 bits, with a minimum density of 1 bits in the output. When NRZI-encoded, the 1 bits provide necessary clock transitions for the receiver. For example, a run of 4 bits such as 0000 contains no transitions and that causes clocking problems for the receiver. 4B/5B solves this problem by assigning each block of 4 consecutive bits an equivalent word of 5 bits. These 5 bit words are pre-determined in a dictionary and they are chosen to ensure that there will be at least two transitions per block of bits.Encoding tableName 4b 5b Description0 0000 11110 hex data 01 0001 01001 hex data 12 0010 10100 hex data 23 0011 10101 hex data 34 0100 01010 hex data 45 0101 01011 hex data 56 0110 01110 hex data 67 0111 01111 hex data 78 1000 10010 hex data 89 1001 10011 hex data 9A 1010 10110 hex data AB 1011 10111 hex data BC 1100 11010 hex data CD 1101 11011 hex data DE 1110 11100 hex data EF 1111 11101 hex data FQ -NONE- 00000 Quiet (signal lost)I -NONE- 11111 IdleJ -NONE- 11000 Start #1K -NONE- 10001 Start #2T -NONE- 01101 EndR -NONE- 00111 ResetS -NONE- 11001 SetH -NONE- 00100 HaltSource; http://en.wikipedia.org/wiki/4B5B

Requirements: No special requirements
Platforms: Matlab
Keyword: Assigning Bitsencoding Block Chosen Consecutive Dictionary Ensure Equivalent Nrziencoded Output Predetermined Problem Problems Provide Solves Tablename Words
Users rating: 0/10

License: Freeware Size: 1.94 MB
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