抄録
Use of G3 facsimiles has been spreading in response to new communication demands. Their cost has been reduced along with their size. The modem used in G3 facsimiles has also been integrated in accordance with these trends.
In order to fabricate a high cost performance modem, we have produced a 1-chip VLSI Modem for G3 facsimiles by using a DSP (DSP-E). To realize this VLSI Modem, we took into consideration the following items. The first was to raise the device production efficiency by lowering the amount of analog circuits which are difficult to include in the VLSI. The second was to incorperate most of the functions by the software processing in order to make a version changes simple.
We had to design the construction architecture of the VLSI and to develop the signal processing method best matched to this modem. This paper deals with the architecture, the processing performance of the DSP, and the specialized monitor software used to arrange software in program ROM efficiently.
