发明名称 Improvements in DTMF tone detection
摘要 The present invention relates to the field of tone detection and, more particularly, to the detection of dual tone multi-frequency (DTMF) tones in software based telecommunications systems. As modern telecommunications systems are becoming increasingly software based and typically require only a minimum of physical hardware, much of the necessary telecommunication functionality is now provided by software functions running on powerful computer servers. A common function which is required to be performed by telecommunications systems is that of dual tone multi-frequency (DTMF) detection. Accordingly, the present invention aims to provide an efficient software-based DTMF detection system that satisfies the ever increasing need for efficient software functions. <IMAGE>
申请公布号 EP1335614(A1) 申请公布日期 2003.08.13
申请号 EP20020354026 申请日期 2002.02.08
申请人 HEWLETT PACKARD COMPANY 发明人 SAUVAGE, PIERRE;MORLAT, SIMON
分类号 H04Q1/457;(IPC1-7):H04Q1/453 主分类号 H04Q1/457
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