GENERAL DESCRIPTION

The CMOS circuit SAA7186 scales and filters digital video data to randomly sized picture windows. YUV input data in 4:2:2 format are required (SAA7191B source).

FEATURES

• Scaling of video picture windows down to randomly sized windows

• Processes maximum 1023 pixels per line and 1023 lines per field

• Two-dimensional data processing for improved signal quality of scaled video data and for compression of video data

• 16-bit YUV input data buffer

• Interlace/non-interlace video data processing and field control

• Line memories in Y path and UV path to store two lines, each with 2 × 768 × 8 bit capacity

• Vertical sync processing by scale control

• Non-scaled mode to get full picture or to gate videotext lines

• UV input and output data binary/two’s complement

• Switchable RGB matrix and anti-gamma ROMs

• 16-word FIFO register for 32-bit output data

• Output formats: 5-bit and 8-bit RGB, 8-bit YUV or 8-bit monochrome