The author was led to the study given in this paper from a consideration of large scale computing machines in which a large number of operations must be performed without a single error in the end result. This problem of “doing things right” on a large scale is not essentially new; in a telephone central office, for example, a very large number of operations are performed while the errors leading to wrong numbers are kept well under control, though they have not been completely eliminated. This has been achieved, in part, through the use of self-checking circuits. The occasional failure that escapes routine checking is still detected by the customer and will, if it persists, result in customer complaint, while if it is transient it will produce only occasional wrong numbers. At the same time the rest of the central office functions satisfactorily. In a digital computer, on the other hand, a single failure usually means the complete failure, in the sense that if it is detected no more computing can be done until the failure is located and corrected, while if it escapes detection then it invalidates all subsequent operations of the machine. Put in other words, in a telephone central office there are a number of parallel paths which are more or less independent of each other; in a digital machine there is usually a single long path which passes through the same piece of equipment many, many times before the answer is obtained.

Notas/Comentarios de J.A.Delgado-Penín:
El autor ha sido la primera persona que creó códigos que detectan y corrigen errores en la transmisión digital y en el almacenamiento de la información (memorias varias), por lo que se considera el creador de la teoría y la técnica de los 'Códigos correctores de errores'. Este autor fue el primero en comprender la importancia de los errores en el manejo de la información en formato digital cuando la misma es alterada de diferentes formas (bien por una perturbación en un canal de comunicación o bien en una memoria de almacenamiento de información). Su primera aplicación se realizó para corregir los errores en la transmisión digital de las señales telefónicas (formato TDM) a grandes distancias.

Especificaciones

  • Autor/es: R. W. Hamming.
  • Año: 1950.
  • Publicado en: The Bell System Technical Journal (Volume: 29; Issue: 2, April 1950; Pages: 147-160).
  • Idioma: Inglés
  • Formato: PDF
  • Contribución: José Antonio Delgado-Penín.
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