Digitales nachrichtenuebertragungssystem mit einem nb/(n+1)b-leitungscode

Digital communication system with an nB/(n+1)B line code

Abstract

In a digital communication system with an nB/(n+1)B line code in which the code converter at the transmitting end, depending on the accumulated disparity and the word disparity of the current input word, inverts or does not invert this input word, the receiving device must be informed whether or not an inversion has taken place in the transmitting device. According to the invention, a control bit (M) is not transmitted directly to the receiving device for this purpose, but is logically combined with one bit of a bit string (BO) which closely approximates a pseudo-random bit string and which is also present at the receiving end or can be generated there. In a further development of the invention, which can also be used in any other nB/(n+1)B code converters, the additional transmission capacity provided by the (n+1)th bit is used at regular intervals for the transmission of a sync word generated in the transmitting device (Fig. 1) and the receiving device is synchronised with this sync word. <IMAGE>

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Cited By (14)

    Publication numberPublication dateAssigneeTitle
    EP-0367093-A2May 09, 1990Hewlett-Packard CompanyGleichstromfreier Leitungscode zur Übertragung von willkürlichen Daten
    EP-0367093-A3July 31, 1991Hewlett-Packard CompanyDc-free line code for arbitrary data transmission
    EP-0511373-A1November 04, 1992Hewlett-Packard CompanyGleichstromfreier leitungskode und bit- und rahmensynchronisation für beliebige datenübertragung
    EP-0511373-A4June 09, 1993Hewlett-Packard CompanyDc-free line code and bit and frame synchronization for arbitrary data transmission
    GB-2357408-AJune 20, 20014Links LtdCodeword substitution in dependance upon run-lengths
    GB-2357408-BAugust 08, 20014Links LtdCommunications system
    US-5438621-AAugust 01, 1995Hewlett-Packard CompanyDC-free line code and bit and frame synchronization for arbitrary data transmission
    US-5612694-AMarch 18, 1997Hewlett-Packard CompanyEncoding data
    US-7450040-B2November 11, 2008Marvell International Ltd.Method and apparatus for generating non-binary balanced codes
    US-7629903-B2December 08, 2009Marvell World Trade Ltd.Method and apparatus for generating non-binary balanced codes
    WO-2007109262-A2September 27, 2007Marvell World Trade Ltd.Procede et appareil de generation de codes equilibres non binaires
    WO-2007109262-A3November 29, 2007Marvell World Trade Ltd, Panue Chaichanavong, Zining WuMethod and apparatus for generating non-binary balanced codes
    WO-9116710-A1October 31, 1991Deutsche Thomson-Brandt GmbhTransmission process for a binary signal
    WO-9502283-A1January 19, 1995Hewlett-Packard CompanyCodage de donnees