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diff --git a/Electronic_Communication_by_D_Roddy/18-FACSIMILE_AND_TELEVISION.ipynb b/Electronic_Communication_by_D_Roddy/18-FACSIMILE_AND_TELEVISION.ipynb new file mode 100644 index 0000000..716bb20 --- /dev/null +++ b/Electronic_Communication_by_D_Roddy/18-FACSIMILE_AND_TELEVISION.ipynb @@ -0,0 +1,247 @@ +{ +"cells": [ + { + "cell_type": "markdown", + "metadata": {}, + "source": [ + "# Chapter 18: FACSIMILE AND TELEVISION" + ] + }, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.2_1: example_1.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"// page no 671\n", +"// prob no 18_2_1\n", +"//A drum of facsimile machine with diameter=70.4mm & scanning pitch=0.2mm/scan\n", +"D=70.4;P=0.2;\n", +"//Determination of index of co-operation \n", +"IOC_CCITT=D/P;\n", +"IOC_IEEE=IOC_CCITT*(%pi);\n", +"disp(IOC_IEEE,'The index of co-operation is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.2_2: example_2.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"// page no 676\n", +"// prob no 18_2_2\n", +"//A drum scanner in eg.18.2.1 with pitch=0.26mm/line & diameter=68.4mm & drum rotate at 120rpm & scans lines=1075\n", +"D=68.4;P=0.26;rpm=120;n=1075;\n", +"//Determination of no. of pixels scan\n", +"Npx=(%pi)*(D/P);\n", +"disp('pixels/line',Npx,'The no. of pixels in scan line is');\n", +"//Determination of scan rate\n", +"Rs=rpm/60;\n", +"disp('lines/sec',Rs,'The scan rate is');\n", +"//Determination of pixel rate is \n", +"Rpx=Npx*Rs;\n", +"disp('pixels/sec',Rpx,'The pixel rate is');\n", +"f_max=Rpx/2;\n", +"//Determination of document Tx time\n", +"td=n/(60*Rs);\n", +"disp('min',td,'The document Transmission time is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.3_1: example_3.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 693\n", +"//prob no. 18.3.1\n", +"a=(4/3);//aspect ratio\n", +"N=525;//no. of line periods per frame\n", +"Ns=40;//no. of suppressed lines\n", +"//Determination of no. of pixel periods in line period\n", +"Nv=N-Ns;\n", +"disp('lines',Nv,'The no. of pixel periods in line period is ');\n", +"//Determination of picture height and width\n", +"Nh=a*Nv;\n", +"disp('pixels',Nh,'The picture height is'); \n", +"Nl=(Nh/0.835);\n", +"disp('pixels',Nl,'The picture length is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.3_2: example_4.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 694\n", +"//prob no. 18.3.2\n", +"//A TV system with\n", +"N=525;P=30;\n", +"//Determination of horizontal and vertical synchhronization freq.\n", +"fh=N*P;\n", +"disp('Hz',fh,'the horizontal freq. is ');\n", +"fv=2*P;\n", +"disp('Hz',fv,'the vertical freq. is ');\n", +"//Determination of time reqd to scan one line\n", +"Th=(1/fh);\n", +"disp('sec',Th,'the time reqd to scan one line is ');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.3_3: example_5.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 695\n", +"//prob no. 18.3.3\n", +"//U.S. NTSC is given \n", +"//refer example 18.3.2\n", +"fh=15750;Nl=775;\n", +"//Determination of video bandwidth\n", +"Bv=0.35*fh*Nl;\n", +"disp('Hz',Bv,'the band width is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.7_1: example_6.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 706\n", +"//prob no. 18.7.1\n", +"//refer example 18.3.1\n", +"a=4/3;//aspect ratio\n", +"D=48.26*10^-2;//CRT tube diagonal\n", +"Nh=647;\n", +"H=sqrt((a^2)*(D^2)/(1+a^2));\n", +"//Determination of viewing angle & minimum dist. \n", +"w=H/Nh;\n", +"theta=Nh*(1/60);//As each pixel subtend 1 minute of arc\n", +"disp('degree',theta,'The viewing angle is');\n", +"X=H/(2*tand(theta/2));\n", +"disp('m',X,'The min. viewing dist is');" + ] + } +, +{ + "cell_type": "markdown", + "metadata": {}, + "source": [ + "## Example 18.7_2: example_7.sce" + ] + }, + { +"cell_type": "code", + "execution_count": null, + "metadata": { + "collapsed": true + }, + "outputs": [], +"source": [ +"clc;\n", +"//page no 707\n", +"//prob no. 18.7.2\n", +"//HDTV system is given\n", +"//Refer example 18.7.1\n", +"a=16/9;D=1.40;Nh=1840;//Assuming square pixel\n", +"H=sqrt((a^2)*(D^2)/(1+a^2));\n", +"//Determination of viewing angle\n", +"theta=Nh*(1/60);\n", +"disp('degree',theta,'The viewing angle is');\n", +"//Determination of viewing dist\n", +"X=H/(2*tand(theta/2));\n", +"disp('m',X,'The viewing dist is');" + ] + } +], +"metadata": { + "kernelspec": { + "display_name": "Scilab", + "language": "scilab", + "name": "scilab" + }, + "language_info": { + "file_extension": ".sce", + "help_links": [ + { + "text": "MetaKernel Magics", + "url": "https://github.com/calysto/metakernel/blob/master/metakernel/magics/README.md" + } + ], + "mimetype": "text/x-octave", + "name": "scilab", + "version": "0.7.1" + } + }, + "nbformat": 4, + "nbformat_minor": 0 +} |