Manu Abraham wrote: > Denys Fedoryshchenko wrote: > >> I have read about Fusion / BT878 chip, and found that I2S bus can >> process only 40Mbps. This means transponders with stream rate higher >> than 40Mbps cannot be received? Or i am wrong? >> > > > It's not the I2S that is used but the GPIO on the Fusion that is used > to transfer data. > > But in any case, 40Mbps is too high a value for a complete > transponder. I don't know of any transponders of that bandwidth. > Moreover we are talking MPEG2 bandwidth. not uncompressed bandwidth. > So 40Mbps is quite large in that aspect .. > > An average transponder which has MPEG2 streams is about 27.5 Mbps > AFAIK. If i am not wrong .. I don't know about MPEG4. > > HTH > Manu > As example Yamal 201 C-Band ISP Klassika 3980 L 38000 3/4 Symbolrate is important as i know for tuner module only, datarate of TS will be: Grabbed from some website So if we were to take a typical 38Mbps, QPSK, DVB carrier operating with ? Viterbi and 188/204 Reed Solomon FEC, the symbol rate would be: 38.014706 * 204/188 * 4/3 *0.5 = 27.5 Msps 38000*2*3/4*188/204=52529 Mbit/s ? And Twinhan/Vision able to receive it. Also on another website in formula is 188-1... i dont know why.
