視訊通訊 homework 2 林葦 m023010042. implement 4-bit igs code lsb is zero lsb is random ...
TRANSCRIPT
視訊通訊homework 2
林葦M023010042
Implement 4-bit IGS code LSB is zero LSB is random Design LSB by myself
Error correction Hamming code
results
outline
LSB is zero
original LSB is zero, PSNR = 31.9
LSB is random
original LSB is random, PSNR = 27.4
Design LSB by myself
Design LSB by myself
original mine, PSNR = 32.3
chart
zero random mine24
25
26
27
28
29
30
31
32
33
PS
NR
Bit error rate 1%
original LSB is zero, PSNR = 24.1
Bit error rate 15%
original LSB is zero, PSNR = 13.4
Hamming code :
p1=d1 d2 d3 p2=d1 d3 d4 p3=d2 d3 d4
Error correction
d1 d2 d3 d4 p1 p2 p3
+ +
+
+
+
+
Bit error rate 1%
PSNR=24.1 PSNR = 27.9
Bit error rate 5%
PSNR=17.8 PSNR = 20.3
Bit error rate 15%
PSNR=13.4 PSNR = 13.9
results
0% 1% 5% 10% 15%0
5
10
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25
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35
zerorandommine
bit error rate
PS
NR
results
0% 1% 5% 10% 15%0
5
10
15
20
25
30
35
protect_zeroprotect_randprotect_mine
bit error rate
PS
NR
results
0% 1% 5% 10% 15%0
5
10
15
20
25
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35
protect_zerozero
bit error rate
PS
NR
results
IGS IGS+hamming code
CR 2 1.14285714285714
0.25
0.75
1.25
1.75
2.25
CR