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
