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Simple Way to Integrate Data and Non-Alterable Non-Coded Information Disclosure Number: IPCOM000040217D
Original Publication Date: 1987-Oct-01
Included in the Prior Art Database: 2005-Feb-02

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Bouillot, M Calvignac, J Munier, JM [+details]


The subject method for integrating data and non-coded information (NCI) consists in systematically inserting zeroes during NCI periods at regular 9-bit boundaries. NCI and data periods are delimited by 11-bit flags. Systematic zero insertions do not take place during the data periods, wherein asynchronous zero insertions take place after five consecutive ones. A technique to mix data and NCI e.g., non-compressed voice, without any transmission delay distortion consists in delimiting data and NCI periods by means of flags, using a zero-insertion/deletion technique within data portions and avoiding flag simulations within NCI periods. This last requirement implies that NCI patterns corresponding to the delimitation flag are modified.