Question

9 A small company deals with multimedia applications wants to save and send its products. Find the following: (a) How many films can be saved in a flash memory of 1 Gbyte. Assume 15 minutes is the duration of each film, and 1 Mbps is its bitstream speed. (b) What is the transmission time (in minutes) needed to download one film over a noiseless channel of B=10 kHz using 256-PSK digital modulator? The transmission should be free from ISI errors. [2+3 Marksi!

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Answer 1

Solcetiono Given data: 9. Given bitrate | Mbps Duration of filme. = 15 mincefes, we have Filo size bitrate & duration Of film I Mbps x 15 mincetes. 1x15 x 60 GB 8 X IDOO (xt for bits to bytes x 60 for minutes to sec. Х 1 000 for mB to GB) 15 x 0.0075 0.1125 GB is the size op ecach film ND.0+ films that can be stored im

a Hlash memary of 1GB = 1 01195 8.89 28 Complete Hilma can be stored easily cb Bitrate for a noiseless channels. ах Bandwidth * 104260) we have Band width 10.000 HZ No of levels 256 i.e. 28 . Bhoate of the channel = 2 x 10,000 x 10yz 28 2 x ID, ODD X8 z 16, 000 obps ops GB min we have to multiny a factor of 88106 x60

16000 ml tx 106x60 20p 36 X1863 Bitaate Golmin 3000 tocansmission time requeired to download one film 0.1125GB YB 000 GB Im o 1125 x 3000 min 337.5 minutes. please give me theemt up.