Information flow transmission method whereby said flow is...

Details Information flow transmission method whereby said flow is... Information flow transmission method whereby said flow is...

G - Physics

10

L

G10L 19/14 (2006.01) H04L 9/12 (2006.01)

Patent

CA 2541805

The invention relates to a method for the transmission of a secondary information flow (DS2) between a transmitter and a receiver, whereby said secondary information flow is inserted at a parametric vocoder (10) of the transmitter which generates a main information flow (DS1). The aforementioned main information flow is a speech data flow encoding a speech signal (VS1) and is transmitted from the transmitter to the receiver. According to the invention, bits from the secondary information flow are inserted into: (i) only some of the frames of the main information flow, said frames being selected by a frame mask (FS) which is known to the transmitter and the receiver; and/or (ii) into a determined frame of the main information flow, by imposing a constraint on only some of the bits of the frame, said bits being selected by a bit mask (BS) known to the emitter and the receiver.

Un procédé de transmission d'un flux d'information secondaire (DS2) entre un émetteur et un récepteur, comprenant l'insertion dudit flux d'information secondaire au niveau d'un vocodeur paramétrique (10) de l'émetteur générant un flux d'information principal (DS1) qui est un flux de données de parole codant un signal de parole (VS1) et qui est transmis de l'émetteur vers le récepteur, prévoit que des bits du flux d'information secondaire sont insérés dans certaines seulement des trames du flux d'information principal, sélectionnées par un masque de trames (FS) connu de l'émetteur et du récepteur, et/ou à l'intérieur d'une trame déterminée du flux d'information principal, en imposant une contrainte à certains seulement des bits de la trame, sélectionnés par un masque de bits (BS) connu de l'émetteur et du récepteur.

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