IMAGE COMMUNICATION APPARATUS AND SIGNAL PROCESSING UNIT

摘要

This image communication apparatus receives a digital signal having a voice bandwidth from an external apparatus capable of communicating through a network, and processes the received digital signal by means of a signal processing unit. If it is determined that the digital signal includes a CNG signal, the image communication apparatus determines that the digital signal is a facsimile signal received as deemed voice, and executes facsimile reception according to the T.30 standard. If it is determined that the digital signal does not include a CNG signal, the image communication apparatus determines that the digital signal is a voice signal, and executes a voice call.

主权项

1. A signal processing unit configured to process a digital signal having a voice bandwidth, comprising:
a modem processing unit configured to process an image signal; a voice processing unit configured to process a voice signal; a first interface conversion unit that is connected to said modem processing unit through a first synchronous serial interface, and is configured to make a system bus and said first synchronous serial interface to said modem processing unit compatible with each other; and a second interface conversion unit that is connected to said voice processing unit through a second synchronous serial interface, and is configured to make a system bus and said second synchronous serial interface to said voice processing unit compatible with each other; wherein: said first synchronous serial interface performs a data transfer by adopting said modem processing unit that is connected to one end thereof as a master and adopting said first interface conversion unit that is connected to another end thereof as a slave; and said second synchronous serial interface adopts both of said voice processing unit and said second interface conversion unit that are connected to one end and another end thereof as a slave, and performs a data transfer to the two slaves at a transfer timing that is identical to a transfer timing of the master.