GENERAL DESCRIPTION

The SAA7120; SAA7121 encodes digital YUV video data to an NTSC or PAL CVBS or S-Video signal.

The circuit accepts CCIR compatible YUV data with 720 active pixels per line in 4:2:2multiplexed formats, for example MPEG decoded data. It includes a sync/clock generator and on-chip DACs.

FEATURES

• Monolithic CMOS 3.3 V (5 V) device

• Digital PAL/NTSC encoder

• System pixel frequency 13.5 MHz

• Accepts MPEG decoded data on 8-bit wide input port; input data format Cb-Y-Cr (CCIR 656), SAV and EAV

• Three DACs for Y, C and CVBS, two times oversampled with 10 bit resolution

• Real time control of subcarrier

• Cross colour reduction filter

• Closed captioning encoding and WST- and NABTS-Teletext encoding including sequencer and filter

• Line 23 wide screen signalling encoding

• Fast I2C-bus control port (400 kHz)

• Encoder can be master or slave

• Programmable horizontal and vertical input synchronization phase

• Programmable horizontal sync output phase

• Internal colour bar generator (CBG)

• 2×2 bytes in lines 20 (NTSC) for copy guard management system can be loaded via I2C-bus

• Down-mode of DACs

• Controlled rise/fall times of synchronization and blanking output signals