Casual Pavan

Digital TV/ Set Top Box Overview Fujitsu provides a complete system solution for the Digital Set Top Box using Fujitsu DVB MPEG Source Decoder with various combination of the front-end, DVB/DSS Channel Decoder and Demodulator for satellite, cable and terrestrial reception. Fujitsu full range of DVB MPEG Source Decoders including SmartMPEG provides customers complete support from free to air, CA/CI to middleware, harddisk set top boxes. Fujitsu Application Program Interface (FAPI) provide customer easy integration in software to adapt to operation systems and highly sophisticated interactive applications like MHP. Digital TV/ Set Top Box Diagram Source: http://www.fujitsu.com/my/services/micro/semiconductor/lsi/dtv/

Resolution WidthxHeight Aspect Ratio YUV420 size SQCIF 128x96 1.33 18432 bytes = 18 Kb QCIF 176x144 1.22 38016 bytes = 37.125 Kb CIF 352x288 1.22 152064 bytes = 148.5 Kb VGA 640x480 1.33 460800 bytes = 450 Kb (~ 3 times bigger than CIF image) D1 720x576 622080 = 607.5 Kb 720p 1280x720 = 1350 Kb (2.22.. times D1 PAL and exactly 3 times of VGA) Notes: Aspect ratio 1.33 implies rectangular(wide) screen while smaller aspect ratio i.e. 1.22 implies sqarer screen. Uncompressed video of TV broadcast quality requires bit rate of 216 Mbps according to ITU-R BT.601-5 recommendation. VGA 25 fps ~= 11 Mbytes/s H.264 output 256 Kbps = 32 K Bytes/s Compression Efficiency is 352 times!!!