Transmitting device for transmitting a digital information...

H - Electricity – 03 – M

Patent

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Details

H03M 7/40 (2006.01) G10L 13/00 (2006.01) G10L 19/00 (2006.01) H04B 14/04 (2006.01) H04L 17/00 (2006.01) H04L 27/00 (2006.01)

Patent

CA 2290644

A transmitter is disclosed for transmitting a digital information signal via a transmission medium. The digital information signal can be divided into one or more sub-signals. Each sub-signal is transmitted as a non-encoded or as an encoded signal. In which way the sub-signal is transmitted depends on the compression that can be achieved by the encoder. If the compression is low the sub-signal is transmitted in non-encoded form. For the receiver an identification is added to the composite signal to be transmitted. A first component of the identification signal indicates if one or more sub-signals are transmitted in encoded form. A second component of the identification signal indicates for each sub-signal whether it appears in encoded or non- encoded form in the composite signal. The invention provides a composite signal with a minimal number of bits.

La présente invention concerne un dispositif d'émission d'un signal numérique d'information via un support d'émission. Le signal numérique d'information peut rester unique ou être divisé en plusieurs sous-signaux. Chaque sous-signal est émis sous forme d'un signal codé ou non codé. La manière dont le sous-signal est émis dépend de la compression réalisée par le codeur. Si la compression est faible, le sous-signal est émis sous forme non codée. Avant son émission vers le récepteur le signal composite reçoit en addition un signal d'identification. Un premier composant du signal d'identification indique si un ou plusieurs sous-signaux sont émis sous forme codée. Un second composant du signal d'identification indique, pour chaque sous-signal, s'il apparaît dans le signal composite sous forme codée ou non codée. La présente invention concerne un signal composite qui présente un nombre minimal de bits.

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