|
Home > Archive > CCNA > October 2000 > passed
You are viewing an archived Text-only version of the thread.
To view this thread in it's original format and/or if you want to reply to
this thread please [click here]
|
|
|
| it is too easy for me.
i can not believe so many ppl out there say it is too difficult.
in fact, it got me too much time.
i should say that anyone can not pass such exam is either too stupid or too lazy or both.
sorry for what i saying.
| |
|
| Congrats on the passing.
Everyone has a forte. Some feel the CCNA 2.0 is easy. Ironically, some believe that Fast Fourier Transform equations (FFT's) are easy. Others have to work at it.
Good Luck..
Whytokayok
| |
|
| I know this is a bit off topic, but since you mention it, does anyone know how to do Fourier analysis of a complex wave, using only trigonometric functions? I saw it done once before and I wrote down the formulae but that was years ago and I've lost them since.
Here's what I'm trying to do:
I have a 65KB one-dimensional integer array which is a 16-bit digital sound sample recorded at 44.100kHz sampling rate.
I need to analyze the fundamental frequency at each point in time as well as the relative amplitudes of the overtones.
My intent is to reduce the entire array into a highly-compressible two-dimensional array of fundamentals and overtones which can be used to resynthesize a satisfactory approximation of original sound as perceived by the human ear.
I have studied acoustics, trigonometry and programming but not calculus, and it has been the bane of my existence.
Any help anyone could offer would be appreciated.
Skip
[This message has been edited by TheSkipster (edited 10-27-2000).] | |
|
| Skip
The signal (orginal wave) is quantized into 128 pulse amplitudes (PAM) We will use 8 pulse amplitudes. These eight amplitudes can be depicted by using only a three bit code instead of an eight bit code normally used to encode each pulse amplitude.
After quantizing, sampls are taken at specific points to produce amplitude modulated pulses. The pulses are then coded. Becuase we used a 8 pulse levels, we only need three binary positions to code each pulse, if we had 128 pulse amplitudes, then a 7 bit code plus one parity bit would be required.
No amount of level of bits will ever result in perfect quality sound reproductions, but in general, 7 bits (2 to the 7th =128 levels) reproduces human speach, Music on the other hand, reqires 16 bits (2 to the 16th =65,536 levels)
next week: field string theroy | |
|
| Needless to say that I am lost as far as it concerns the relative amplitudes of the overtone. Which is probably why I am one of those stupid and lazy "ppl", Japrunt was kind enough to make a point off. Some modesty will suit him fine I think, but still I congratulate him with his success on the exam and wish him good luck with the impressive career he will have in the networking business.
I am sure that Japrunt will also provide us with his words of wisdom and help the Skip out with his problem.
6pack
| |
|
| I doubt japrunt even took the test. I think mastering basic grammar is a prerequisite for taking the exam.
Cheers,
CCNA, future MCSE
[This message has been edited by networkboy (edited 10-27-2000).] | |
|
| I am really sorry for saying such words. I dont want hurt anyone. I just hope anyone who are going to take this test take it easy.
For those just want pass CCNA2, Lammel's book is enough. But i must admit that Wendell's book is much better for job.
By the way, I passed it just missed two. Maybe i can do it better.
MCSE(NT4), CCNA2
| |
|
| I am going to take CCNP now! and hope to see you there.
jap-runt
|
|
|
|
|