Title :
A CMOS facsimile video signal processor
Author :
Nakashima, Keisuke ; Tadauchi, Masaharu ; Hamada, Nagaharu ; Sato, Kunio ; Yasunari, Kenjiro ; Nagayama, Yoshiharu ; Nagai, Kenji ; Suemori, Noboru ; Kubo, Takashi
Abstract :
A CMOS image scanning signal processor which can be used for CCITT Group-4 facsimile has been developed. To obtain high-speed processing (5 MHz) and high-precision shading distortion correction (up to 70%), hybrid architecture of digital and analog techniques and parameter setting by software are combined. Image sensor and printer interfaces and a digital processor which can do linear zooming and data format conversion are built into a chip. The 6.5/spl times/7.8-mm chip is fabricated using 2.5 /spl mu/m CMOS technology and contains 25000 transistors.
Keywords :
CMOS integrated circuits; Facsimile equipment; Large scale integration; Picture processing; Signal processing equipment; Video signals; facsimile equipment; large scale integration; picture processing; signal processing equipment; video signals; CMOS image sensors; CMOS process; CMOS technology; Facsimile; Image converters; Image sensors; Large scale integration; Signal design; Signal processing; Video signal processing;
Journal_Title :
Solid-State Circuits, IEEE Journal of
DOI :
10.1109/JSSC.1985.1052456
