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Petrus Josephus Van Gerwen: System for the transmission of speech signals. U S Philips Corporation, Frank R Trifari, Henry I Steckler, July 5, 1977: US04034160 (12 worldwide citation)

A speech bandwidth compression system uses a first set of filters to separate the speech signal into baseband (300-800 hz) and highband (800-3200 hz) signals. The baseband (first formant or fundamental pitch frequency) is transmitted directly, and is also rectified to form harmonics which are mixed ...


2
Drascher Thorsten, Huelskemper Michael, Lorenz Frank: Method and communication system for the transmission of speech signals, and configuration network element for carrying out said method. Siemens, lujiang liuchun yuan, January 30, 2008: CN200680004255

According to the invention, speech signals (SPS1) pass a plurality of speech signal processing units (TEC, NEC1) and/or speech codec units (NCD1, NCD2, NCD3) on the transmission path (CP1) thereof when said speech signals (SPS1) are transmitted between a transmitting communication device (MT) and a ...


3
Drascher Thorsten, Huelskemper Michael, Lorenz Frank: Method and communication system for the transmission of speech signals, and configuration network element for carrying out said method. Siemens, October 24, 2007: EP1847139-A1

Bei der Übertragung von Sprachsignalen (SPS1) zwischen einem sendenden Kommunikationsgerät (MT) und einem empfangenden Kommunikationsgerät (VOIPT) über einen Übertragungsweg (CP1) durch ein oder mehrere Kommunikationsnetze (GSMN, DFN, AFN, IN) hinweg wird von den Sprachsignalen (SPS1) auf ihrem Über ...


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Drascher Thorsten, Hülskemper Michael, Lorenz Frank: (De) Verfahren und kommunikationssystem zur übertragung von sprachsignalen und konfigurations-netzwerkelement zur durchführung des verfahrens, (En) Method and communication system for the transmission of speech signals, and configuration network element for carrying out said method. Siemens Aktiengesellschaft, Drascher Thorsten, Hülskemper Michael, Lorenz Frank, SIEMENS AKTIENGESELLSCHAFT, August 10, 2006: WO/2006/082208

(EN) According to the invention, speech signals (SPS1) pass a plurality of speech signal processing units (TEC, NEC1) and/or speech codec units (NCD1, NCD2, NCD3) on the transmission path (CP1) thereof when said speech signals (SPS1) are transmitted between a transmitting communication device (MT) a ...



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