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Device for transmitting data words representing a digitalized analog signal and device for receiving the transmitted data words

  • US 5,146,457 A
  • Filed: 11/14/1991
  • Issued: 09/08/1992
  • Est. Priority Date: 09/16/1988
  • Status: Expired due to Term
First Claim
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1. A device for transmitting a series of data words representing digitized signal samples, each data word having a plurality of bits of respective orders of significance, said device comprises means for modifying selected data words in said series prior to transmission by replacing one or more least significant bits of each selected data word with substitute bits derived in accordance with an additional digital information signal, so that such signal is represented by the substitute bits of the transmitted modified data words;

  • the least significant bits of a selected data word being bits thereof of lesser significance than the remaining unreplaced bits thereof;

    characterized in that said modifying means comprises;

    means for producing a series of other bits which are substantially non-correlated with said additional information signal; and

    means for deriving the substitute bits of each selected data word in accordance with logical combinations of respective bits of the additional information signal and one or more of said series of other substantially non-correlated bits.

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