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