发明名称 |
Transmission system for transmitting G3 facsimile signals and compressed speech signals |
摘要 |
A speech signal coding system including a speech signal encoder for dividing received speech signals into a plurality of frames each having a predetermined time interval and for converting the speech signals into digital speech parameters. The system includes a multiplexer for multiplexing the output digital data from the speech signal encoder into a predetermined frame format; a control frame generator for generating, in response to an inputted facsimile signal, a control frame having speech data frame configuration for identifying a facsimile signal identification data indicating the input signal as the facsimile signal. A facsimile signal demodulator converts the facsimile signal into digital data and a bit-synchronous multiplexer multiplexes the digital data. An output device outputs the speech data frame of the multiplexer to a digital transmission line and further outputs, when a facsimile signal is input, the control frame and facsimile data multiplexed as the bit synchronous data onto the digital transmission line.
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申请公布号 |
US5323398(A) |
申请公布日期 |
1994.06.21 |
申请号 |
US19920966132 |
申请日期 |
1992.10.23 |
申请人 |
NEC CORPORATION |
发明人 |
WAKE, YASUHIRO;USUKI, KATSUNORI |
分类号 |
H04N1/00;H04M11/06;H04N1/327;(IPC1-7):H04J3/00 |
主分类号 |
H04N1/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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