Voice/image simultaneous communication apparatus

A voice/image simultaneous communication apparatus comprising:

• image input means for receiving an image to convert it into image data and delivering the image data;
• image coder means for compressively coding the image data delivered out of said image input means to convert it into image coded data and delivering the image coded data;
• voice input/output means for converting an inputted voice into an analog electric signal to deliver it and converting an inputted analog electric signal into a voice to deliver it;
• voice coder means for converting the analog electric signal delivered out of said voice input/output means into a digital signal and thereafter compressively coding the digital signal to convert it into voice coded data so as to deliver it;
• data synthesizer means for synthesizing the image coded data delivered out of said image coder means and the voice coded data delivered out of said voice coder means through a predetermined method and delivering synthesized coded data;
• data modem means for modulating the coded data delivered out of said data synthesizer means to deliver modulated data to a telephone line and demodulating coded data received from said telephone line to deliver demodulated data, said data modem means being capable of changing the data transmission speed during modem operation stepwise;
• data separator means for separating the demodulated data delivered out of said data modem means into image coded data and voice coded data through a predetermined method and delivering them;
• image decoder means for decoding the image coded data delivered out of said image decoder means into image data and delivering it;
• image output means for receiving the image data delivered out of said image decoder means to convert it into an image and delivering the image;
• voice decoder means for decoding the voice coded data delivered out of said data separator means to convert it into an analog electric signal and delivering the analog electric signal to said voice input/output means;
• circuit connecting means for connecting said data modem means and said telephone line;
• and
• system controller means for controlling the whole of a system,
• wherein before voice/image simultaneous communication is carried out, said system controller means controls said data modem means in accordance with information produced from said data modem means and used to decide the condition of said telephone line so as to change the data transmission speed in said data modem means and controls said data synthesizer means in accordance with the data transmission speed in said data modem means so as to change the ratio between the image coded data and the voice coded data which are to be synthesized by means of said data synthesizer means.