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COMPRESIÓN
DE DATOS
Wilfreddy Barco, C.I: 22.195.007
Universidad Fermín Toro
Vice Rectorado Académico
Facultad de Ingeniería
Escuela de Telecomunicaciones
COMPRESIÓN DE DATOS
La compresión consiste en sustituir la
cadena de datos por otra más corta cuando
se guarda el archivo
Se diferencian entre sistemas
adaptativos, no adaptativos y semi-
adaptativos, según tengan en cuenta o no las
características del archivo a comprimir
COMPRESIÓN SIN PÉRDIDAS
OTROS TIPOS DE COMPRESIÓN DE DATOS
 Física:
La compresión física actúa directamente sobre los datos; por lo
tanto, es cuestión de almacenar los datos repetidos de un patrón de
bits a otro.
 Lógica
Se lleva a cabo por razonamiento lógico al sustituir esta información
por información equivalente.
 Simétrica
Se utiliza el mismo método para comprimir y para descomprimir los
datos. Por lo tanto, cada operación requiere la misma cantidad de
trabajo.
 Asimétrica:
Requiere más trabajo para una de las dos operaciones.
Es Frecuente buscar algoritmos para los cuales la
compresión es más lenta que la descompresión.
 Comprensión con perdida
A diferencia de la compresión sin pérdida, elimina
información para lograr el mejor radio de compresión
posible mientras mantiene un resultado que es lo más
cercano posible a los datos originales

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Compresión de datos

  • 1. COMPRESIÓN DE DATOS Wilfreddy Barco, C.I: 22.195.007 Universidad Fermín Toro Vice Rectorado Académico Facultad de Ingeniería Escuela de Telecomunicaciones
  • 2. COMPRESIÓN DE DATOS La compresión consiste en sustituir la cadena de datos por otra más corta cuando se guarda el archivo
  • 3. Se diferencian entre sistemas adaptativos, no adaptativos y semi- adaptativos, según tengan en cuenta o no las características del archivo a comprimir COMPRESIÓN SIN PÉRDIDAS
  • 4. OTROS TIPOS DE COMPRESIÓN DE DATOS
  • 5.  Física: La compresión física actúa directamente sobre los datos; por lo tanto, es cuestión de almacenar los datos repetidos de un patrón de bits a otro.  Lógica Se lleva a cabo por razonamiento lógico al sustituir esta información por información equivalente.  Simétrica Se utiliza el mismo método para comprimir y para descomprimir los datos. Por lo tanto, cada operación requiere la misma cantidad de trabajo.
  • 6.  Asimétrica: Requiere más trabajo para una de las dos operaciones. Es Frecuente buscar algoritmos para los cuales la compresión es más lenta que la descompresión.  Comprensión con perdida A diferencia de la compresión sin pérdida, elimina información para lograr el mejor radio de compresión posible mientras mantiene un resultado que es lo más cercano posible a los datos originales