diff options
| author | priyanka | 2015-06-24 15:03:17 +0530 |
|---|---|---|
| committer | priyanka | 2015-06-24 15:03:17 +0530 |
| commit | b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b (patch) | |
| tree | ab291cffc65280e58ac82470ba63fbcca7805165 /116/CH3 | |
| download | Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.gz Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.tar.bz2 Scilab-TBC-Uploads-b1f5c3f8d6671b4331cef1dcebdf63b7a43a3a2b.zip | |
initial commit / add all books
Diffstat (limited to '116/CH3')
| -rwxr-xr-x | 116/CH3/EX3.1/exa3_1.sce | 19 | ||||
| -rwxr-xr-x | 116/CH3/EX3.2/exa3_2.sce | 26 | ||||
| -rwxr-xr-x | 116/CH3/EX3.4/exa3_4.sce | 23 |
3 files changed, 68 insertions, 0 deletions
diff --git a/116/CH3/EX3.1/exa3_1.sce b/116/CH3/EX3.1/exa3_1.sce new file mode 100755 index 000000000..6dafadd7c --- /dev/null +++ b/116/CH3/EX3.1/exa3_1.sce @@ -0,0 +1,19 @@ +//Caption:Program to calculate quantization interval and bits needed to encode each sample
+
+//Example 3.1
+
+//Page 101
+
+sqr=30//SQR=30dB
+
+q=1*10^[-(sqr-7.78)/20]
+
+disp('Thus 13 quantization intervals arer needed for each polarity for a total of 26 intervals in all. The number of bitz required are determined as')
+
+N=log2(26)
+
+//Result
+
+//q = 0.078 V
+
+//N = 4.7 = 5 bits per sample
\ No newline at end of file diff --git a/116/CH3/EX3.2/exa3_2.sce b/116/CH3/EX3.2/exa3_2.sce new file mode 100755 index 000000000..f2c233f69 --- /dev/null +++ b/116/CH3/EX3.2/exa3_2.sce @@ -0,0 +1,26 @@ +//Caption:Program to calculate the minimum bit rate for a PCM encoder must provide for high fidelity
+
+//Example 3.2
+
+//Page 105
+
+dr=40//dynamic range=400dB
+
+SNR=50//signal to noise ratio =5 0dB
+
+SQR=dr+SNR
+
+n=[(SQR-1.76)/6.02]
+
+disp('This can be approximated to 15 bits per sample')
+
+disp('Assuming excess sampling factor using D-type channel, we choose sampling rate as 48KHz')
+
+disp('Therefore required bit rate is')
+
+15*48000
+
+//Result
+
+//720kbps
+
\ No newline at end of file diff --git a/116/CH3/EX3.4/exa3_4.sce b/116/CH3/EX3.4/exa3_4.sce new file mode 100755 index 000000000..eb0c422f7 --- /dev/null +++ b/116/CH3/EX3.4/exa3_4.sce @@ -0,0 +1,23 @@ +//Caption:Program to calculate how many bits per sample can be saved by using DPCM
+
+//Example 3.4
+
+//Page 128
+
+w=800//Omega=800Hz
+
+//x(t)=A sin(2pi.wt), equation for sine wave with maximum amplitude
+
+//x'(t)=A(2pi).w.cos(2pi.wt), diff w.r.t time
+
+(2*%pi)*800*(1/8000)
+
+//0.62831*a, x'(t)max
+
+disp('savings in the bits per sample can be determined as ')
+
+log2(1/0.628)
+
+//Result
+
+//0.67 bits
\ No newline at end of file |