Transmission system for transmitting G3 facsimile signals and compressed speech signals

Claim 2

A speech signal coding system comprising a speech signal encoder for dividing input speech signals into a plurality of frames each having a predetermined time interval and for converting said speech signals into digital speech parameters, a multiplexer for multiplexing digital data being outputted from said speech signal encoder into a predetermined frame format, a control frame generator for generating, in response to an input of a facsimile signal, a control frame having a speech data frame configuration for indentifying a facsimile signal identification data indicating said input signal as the facsimile signal, a facsimile signal demodulator for converting said facsimile signal into digital data, a bit synchronous multiplexer for multiplexing said digital data converted by said facsimile signal demodulator as bit synchronous data, and output means for outputting, when a speech signal is input, a speech data frame as an output of said multiplexer to a digital transmission line, and outputting, when the facsimile signal is input, said control frame followed by facsimile data multiplexed as said bit synchronous data to said digital transmission line.

Claim 3

A speech signal coding and decoding system comprising: a speech signal coding system including a speech signal encoder for dividing inputted speech signals into a plurality of frames each having a predetermined time interval and for converting said speech signals into digital speech parameters, a multiplexer for multiplexing digital data outputted from said speech signal encoder into a predetermined frame format, a control frame generator for generating, in response to the input of a facsimile signal, a control frame having a speech data frame configuration for identifying a facsimile signal identification data indicating said input signal as the facsimile signal, a facsimile signal demodulator for converting said facsimile signal into digital data, a bit synchronous multiplexer for multiplexing said digital data converted by said facsimile signal demodulator as bit synchronous data, and output means for outputting, when a speech signal is input, a speech data frame as an output of said multiplexer to a digital transmission line, and outputting, when the facsimile signal is input, said control frame followed by facsimile data multiplexed as said bit synchronous data to said digital transmission line, and a speech signal decoding system including a frame sync signal detector for detecting a frame sync signal in data received from said digital transmission line, a speech signal decoder for reproducing the original speech signal by using said speech parameters, when said received data is a speech data frame including speech parameters, processing means for processing, when said received data is said control frame having the speech data frame configuration, the received data following said control frame as bit synchronous data, and a facsimile data modulator for modulating the output of said processing means into a modem signal.

Claim 4

A speech signal coding and decoding system comprising: a speech signal coding system including a speech signal encoder for dividing inputted speech signals into a plurality of frames each having a predetermined time interval and for converting said speech signals into digital speech parameters, a multiplexer for multiplexing digital data outputted from said speech signal encoder into a predetermined frame format, a control frame generator for generating, in response to the input of a facsimile signal, a control frame having a speech data frame configuration for identifying a facsimile signal identification data indicating said input signal as the facsimile signal, a facsimile signal demodulator for converting said facsimile signal into digital data, a bit synchronous multiplexer for multiplexing said digital data converted by said facsimile signal demodulator as bit synchronous data, and output means for outputting, when a speech signal is input, a speech data frame as an output of said multiplexer to a digital transmission line, and outputting, when the facsimile signal is input, said control frame followed by facsimile data multiplexed as said bit synchronous data to said digital transmission line, and a speech signal decoding system including a frame sync signal detector for detecting a frame sync signal in data received from said digital transmission line, a speech signal decoder for reproducing the original speech signal by using said speech parameters, when said received data is a speech data frame including speech parameters, processing means for processing, when said received data is said control frame having the speech data frame configuration, the received data following said control frame as bit synchronous data, and a facsimile data modulator for modulating the output of said processing means into a modem signal.

Claim 5

A speech signal coding and decoding system comprising: transmitting coded speech signals as a speech frame when an input signal is speech signals; transmitting a G3 facsimile data as a bit synchronous data after transmission of a G3 control frame having the same construction as that of the speech frame when said input signal is G3 facsimile signal; and decoding the transmitted data of said coded speech signal data and G3 facsimile data based upon said G3 control frame.

Claim 6

A speech signal coding and decoding system comprising: transmitting coded speech signals as a speech frame when an input signal is speech signals; transmitting a G3 facsimile data as a bit synchronous data after transmission of a G3 control frame having the same construction as that of the speech frame when said input signal is G3 facsimile signal; and decoding the transmitted data of said coded speech signal data and G3 facsimile data based upon said G3 control frame.