Description
The FS450 is a fourth generation video scan converter. It accepts many input resolutions, rates and formats and converts them to NTSC or PAL standards compliant with SMPTE-170M and CCIR-656 standards. The chip has a programmable down scaler to fit the incoming resolution to the output display format. The CCIR 656 ports allow external interface to other video chips. The synch control block generates frame reset for genlocking other video components. Required external components are minimal: a single 27 MHz oscillator or crystal and passive parts.
Digital progressive RGB inputs are downscaled or upscaled to the CCIR-656 horizontal pixel count and converted to the 656 format. Vertical scaling and flicker filtering are done in 656 format.
The Flicker Filter is an advanced 2 dimensional filter that enhances text quality. Flicker Filter and Sharpness parameters are programmable.
A digital video encoder that generates Y/C and Composite Video outputs is part of the FS450. For the composite output in NTSC, Y-Notch and C-Bandpass filters are available. For RGB and YUV outputs, the encoder may be bypassed via a YUV to RGB transcoder for SCART compatible video.
Scaling and clock parameters are automatically programmed by the driver, so the system remains genlocked with resolution changes. The input parameters to the automatic scaling are TV viewable area, PAL or NTSC, and the GCC CRT Control Registers’ settings.
The FS451's encoder incorporates Macrovision 7 anti-copy protection technology.
All parameters can be read and written via the I2C compatible serial port.
Power is derived from +3.3V digital and analog supplies. The package is 100- lead Quad Flat Pack (PQFP). |
