专利名称：Device for the transmission of digital data
with at least two levels of protection andcorresponding reception device
发明人：Roselyne Halbert-Lassalle,Jean-Francois
Helard,Bernard Le Floch
申请号：US07/671483申请日：19910319公开号：US05197061A公开日：19930323
摘要：A device for the transmission of digital data with at least two levels of
protection, of the type providing for the distribution of the data to be transmitted in theform of digital elements in the time- frequency space and the transmission of symbolseach formed by a multiplex of N orthogonal carriers modulated by a set of the digitalelements, and transmitted simultaneously, the device including channel encoding meanscomprising at least two types of modulation and/or at least two encoding efficiencylevels. This enables to optimize the use of the transmission channel by assigningdifferentiated transmission techniques to portions of data of a same digital train as afunction of the different levels of protection sought, against transmission errors.
申请人：ETAT FRANCAIS,TELEDIFFUSION DE FRANCE
代理机构：Locke Reynolds
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