MDP Quiz 2 Answer Reveal!

1. Nyquist Theorem or theorem of sampling says that if a signal to be imitate digitally correct than the sampling size should be 2 times the original signal.

2. Given an original signal with frequency in between 20Hz to 20 000Hz, the suitable sampling rate used to digitize the signal based on the theory of sampling is 40Hz to 40 000Hz.

3. Y is sampled at 15 000Hz

a) Play in between 0.2 to 2.0 seconds

wavplay(Y(0.2 x 15000 : 2.0 x 15 000), 15000)

wavplay(Y(3000 : 30000), 15000)

b) Sample in between 0.2 to 2.0

-> (2.0 – 0.2) x 15000 = 1.8 x 15000), 15000)

-> (2.0 x 15000) – (0.2 x 15000) = 30000 – 3000 = 27000

c) Playback effect

-> If the value of playback is lower than the signal for example 8000Hz the sound will be slower or lower pitch

-> If the value of playback is higher than the original signal for example 20 000Hz than the sound play will be faster of higher pitch

4. v = [9700 19000 23000 31700];

    u = [9900 11000 20000 23200 33700 36100 3800];

-> In time (divide by 16000)

v = [0.6062 1.1875 1.4375 1.9813]

u = [0.6188 0.6875 1.2500 1.4500 2.1063 2.2563 2.3750]

So from the question, these information can be directly extracted

p = 4; // number of reference points

n = 7; // number of auto segmentation points

Calculate match at 0.05 by calculating the difference between reference points and auto segmentation points. The easiest way is by developing the difference table between auto and reference points.

	0.61875	0.6875	1.25	1.45	2.10625	2.25625	2.375
0.60625	0.0125	0.08125	0.64375	0.84375	1.5	1.65	1.76875
1.1875	0.56875	0.5	0.0625	0.2625	0.91875	1.06875	1.1875
1.4375	0.81875	0.75	0.1875	0.0125	0.66875	0.81875	0.9375
1.98125	1.3625	1.29375	0.73125	0.53125	0.125	0.275	0.39375

m = 2

i = n – m = 7 – 2 = 5

o = p – m = 4 – 2  = 2

p(m) = m/p x 100 = 2/4 x 100 = 50%

p(i) = i/n x 100 = 5/7 x 100 = 71.4%

p(o) = o/p x 100 = 2/4 x 100 = 50%

5. The information can be extracted from the question. Total signal. S = 8000 x 2.0 s = 16000 samples

Size of processing windows, N  = 8000 x 40ms = 320 samples

Size of overlapped windows, m = 8000 x 20ms = 160 samples

Number of auto correction p=12

Number of N in the signal can be calculated based on this formula

nN = ((S –m) / N) x 2

nN = ((16000 – 160)/ 320) x 2

nN = 15840/320 x 2

nN = 49.2 x 2

nN = 99

So, the number of features vector is N x p = 99 x 12 = 1188

The compression ratio is original signal = 16000 sample value

Compressed signal = 1188 sample value

So, compression ratio (16000 – 1188) / 16000 x 100 = 92.6%

P/s: Good Luck for final exam! Please share more notes and tips hehe... =)

The Nine Over Ten

The Nine Over Ten, hurm. very interesting right. If you pass an examination with flying color,  it could be in the range of nine over ten right? However, this entry was non of exam thing, I had no interest to talk about it. The nine over ten that I intended to share right here is the 9/10 of our wealth and provision comes from running FAIR BUSINESS as being taught by our Holy Prophet Muhammad pbuh 1400 years ago. The point is, it is not just only business, I had emphasized the word FAIR then only the business we run wouldn't be such a treachery, misleading, and ruin to others in any manner. Allah had forbidden all man kind from doing mischief, corruption and gambling as these habit doesn't proven to give benefit actually and even worst. Everything that being describe in Holy Qur'an and As-sunnah and altogether some prophecy that being foretold is to help all the creation to be granted His love and submit themselves to Almighty Lord where we came from and to Him we submit.

So far, for kick start, we might want something that worth us in running a business, something like gain more profit. Before that, we must know that doing fair business face lots of risk as it suit with the profit we target. We might be tested with some failure or loss. A very strong heart should not be affected by loss and failure as one will kept trying until succeed. So, the skill in management and emotional control play some rule here. We might learn from our own mistake but The Wise, learn from others mistake. Books, magazines, web pages or any form of information shall be our 'friend' to keep in save track in doing this fair business. One more important thing is our submission to after doing effort, insyaAllah, we will succeed. 

That is the theory and some tips reveal but to make it real, plan and implement it. Good Luck! Good Life!

"The Pen Has Been Lifted and The Pages Have Dried" - Reported by Ibnu Abbas

Adhwa Yahaya

Awkward!

It CAN'T be! (UK Accent) but yes, it should be. Sometimes we want thing to happen as we plan however, things also might happens in others way. The good things shall reveal the right things, the bad things shall reveal evil things. Thing, things too many probability... Everything in this world is mortal but each of them has the rule to play to assure that the world in stable state. 


There are awkward things that which also can be consider as the perfect one to be torn apart. Different people tend to understand the word 'awkward' in differ definition, depend on their ages, mind level, background, experience and such things.


Some pictures below that might be considered as awkward things around me:

My Bed, My Bad lol