Huang Zongji's eyes and nose also swollen.

"Hey, brother, do you think you're relieved? You can develop it with peace of mind now." Huang Sheng said, his eyes flashing, and the meaning was very obvious. This was to kill the chicken to warn the monkey and tell Liu Meng not to make any excuses for not cooperating, it's better to develop it honestly. He is not a good person.

Huang Zong was so beaten that he was dizzy, covering his face, and did not dare to hide, looking pitiful.

Liu Meng snorted lightly and said, "Where are the things I want?"

"Are you all here? I forgot about this after you make trouble. Look, are you all?" Huang Sheng immediately smiled and took out a bag and handed it over.

Liu Meng took it back and looked at it carefully. A book of discrete signal processing, a book of discrete signal processing functions in Matlab, and a CD, which is Matlab software, which is almost exactly what he wrote. He couldn't help but look at Huang Sheng. After half a day of collection, it was really hard for him.

"With these things, I will do my best to develop them. However, please take care of your people. I don't want to be disturbed anymore." Liu Meng said coldly.

"I can definitely guarantee this. No one will bother you anymore. Get out of here." As he said that, Huang Sheng greeted the two of them, smiled at Liu Meng, and left the laboratory.

After the three of them went out, Liu Meng sneered secretly, hey, Huang Zong was beaten like this, I'm afraid he needs to go to the doctor. Finally, one of them was defeated, and the remaining two were relatively easy to deal with.

As soon as the door was closed, the bookshelf was pushed back, and the office was restored. Huang Zong covered his face and said aggrievedly: "Uncle, why are you still hitting me? It's obviously that kid is not working together, I just want to teach him a lesson."

Huang Sheng said with a cold face: "How can I tell you when I leave? Just be optimistic. Whoever wants you to provoke him on your own initiative? Such technical talents have tempers. If they are too forced, they will only backfire."

"It's really not my fault, uncle." Huang Zong said pitifully.

Huang Sheng raised his hand and wanted to smoke him again. Huang Zong hurriedly avoided him, lit a cigarette, and said, "Okay, stop pretending, I don't know what kind of virtue you are?"

He paused and said, "I'll emphasize it again. You two are staying in the office here. Without my permission, you are not allowed to enter the laboratory again. Just observe the surveillance screen secretly. Don't cause trouble for me anymore. A pair of uneasy things."

"Uncle, once it's done, is going to give him money? 150,000 is not a small amount. If we do this, this kid will not call the police to arrest us after he goes out." Huang Zong asked nervously. He didn't have time to think about doing this at the beginning. Now that he has a fight with Liu Meng, he is really shocked by his ruthlessness just now, and he is starting to feel a little scared in his heart.

"Hey, my yellow-haired money is so easy to make. I still have to put it aside. After the development is completed, you can teach me a lesson first." The uncle and nephew laughed very well, but Huang Zong smiled, pulling his face, his eyes and nose hurt.

Huang Sheng paused and said, "Report to the police to arrest us? Why? There is no evidence of physical evidence. He is a poor student. He has no power background and speaks in vernacular terms. Who believes it? Do you believe it? Or do you believe it?" Huang Sheng laughed and pointed at Huang Zong, then pointed at Hu Zi and asked, sneering in his words, extremely proud.

"Of course I don't believe it. How can a child talk nonsense?" Huang Zong laughed.

Hu Zi also touched his head silly and replied, "I don't believe it either."

It was only when Huang Sheng expected this that he was fearless and did not worry about the consequences at all.

"That's right, I'm afraid of a bird. In this ice city, playing with a student is like killing an ant." As he said that, Huang Sheng leaned on the big leather chair, took a few sips of cigarettes comfortably, and vomited a small cigarette ring.

Huang Zong nodded repeatedly, cried and said, "Uncle, look at my eyes, nose, and face, which is considered an industrial injury. I have to see a doctor."

Huang Sheng also knew that this nephew was not capable, but fortunately he was loyal. In order to appease Liu Meng, he slapped him a few times. Now he should give him a sweet date and throw him three thousand yuan and said, "Now Liu Meng is still obedient. With a tiger, I am here too. I will give you a half-day vacation. You can go see the doctor first."

When Huang Zong got the money, he immediately smiled and flattered Huang Sheng a few times. He felt itchy and thought, I'll go to a big health care first, the hospital, and you'll have to take a look. The more you think about it, the more you feel, I want to leave immediately.

Huang Sheng then gave Hu Zi another 2,000 yuan and said, "Take it and make a living with me. I will never treat my brothers badly. This is done. You two will never have to worry about food and clothing in your life."

Hu Zi was silly and took the money, clicked a little in his hand first, laughed, and hurriedly put it in his pocket. Huang Sheng scolded in his heart, "It's really a fucking lack of strings in his mind, I can give you less."

While the three of them were teasing each other in the office, Liu Meng put the book "Discrete Digital Signal Processing" in front of him and pretended to read it. In fact, he didn't have to read it at all. He had already mastered it.

Looking like this, he clicked his finger on the book to write and draw. This was also a habit when Liu Meng was thinking about problems. No matter what, he liked to write it, but he didn't dare to write it on paper at this time. He was worried that Huang Sheng and others would see the clues from it. Although the possibility was very low, he could not take risks anymore.

Think about the brain as paper and the hands as pen.

The micro high-voltage pulse power supply device requires capacitors, electrolytic capacitors, diodes, triple headers and other devices, and what is lacking is the winding of the two transformers.

Both transformers must be high-frequency, and the iron core must be ferrite cores, which are very different from the 50Hz power frequency of the mains.

The first stage is a high-frequency resonant transformer, with a resonant frequency of about 1000 to 5000Hz. Liu Meng quickly calculated in his mind that the capacitor capacity is 2.2uF, so the leakage inductance of this high-frequency resonant transformer is about 1~5mH. It is most suitable to calculate step by step according to the resonant frequency formula. The performance of the leakage inductance is better, and the resonant frequency is about 2400Hz. This can not only meet the high-frequency needs, but also ensure the power supply needs of analog devices in the next step-up.

The parameters were secretly recorded in my mind, and the transformation ratio of the first-stage transformer was about 8. The number of turns to be turned on is calculated using these two parameters. This involves complex electromagnetic problems, which Liu Meng could not calculate for a while.

In the past, when Liu Meng developed his own products and needed to wind the transformer, he usually built a simple resonant circuit to directly test the leakage inductance. Then he improved it.

A practical device involves both theory and engineering, and it is necessary to combine the two.

A skillful woman is hard to cook without rice. Even though she knows how to do it, she does not have ready-made materials. The ferrite core and enameled copper wire are too different from the devices required by the music player. Liu Meng could not ask Huang Sheng to purchase these two things, so as not to arouse suspicion.

Liu Meng learns from his mistakes and becomes wise. He is a sinister person and will no longer be in danger for no reason.

The micro high-voltage pulse power supply device can only be considered here first, and the music player must be developed. Otherwise, there will be no progress, which will also arouse Huang Sheng's suspicion.

Without hesitation, Liu Meng first installed Matlab software on his computer. This software is very convenient to debug digital processing algorithms, but there are many ready-made functions to call.

The music player is actually a process of transformation and recovery. The original digital signal of 40MB space is converted to 2MB. During the playback, the compressed 2MB signal must be restored to the level of 40MB. The playback is restored so that it does not occupy space and maintains audio quality.

Fortunately, Huang Sheng had already prepared well before, and bought a lot of various micro controllers and memory chips needed for the music player. After getting the idea, Liu Meng began to debug the algorithm.

In fact, this algorithm is to filter out useless signals and discard them, leaving behind the most core signal. According to the sampling principle, in a certain frequency segment, only a fixed number of sampling points is required within a period, and the analog signal of this frequency can be restored using a digital signal processing algorithm.

After importing an audio, Liu Meng began to write an algorithm to convert the minimum number of points and recover. After being completely immersed in it, he forgot where he was. This is the technology he had studied in the library before, and he had not had time to implement it in detail. Huang Sheng gave him a good opportunity this time.

After several hours of repeated debugging, the algorithm was constantly improved, and the compression ratio was only about 20 times, which was similar to the products on the market. It was just that the sound quality was improved a little when it was restored. In fact, it could meet the requirements that Huang Sheng only wanted to copy it.

However, Liu Meng did not develop for him, but had been thinking about it for a long time. He was interested in it and had thought about it. With his own pursuit of excellence in technology and pursuit of perfection, he would certainly not be satisfied with copying the level of existing technology.

It's a fundamental breakthrough.

After making many attempts, he could not make any breakthroughs. Liu Meng fell into deep thought again. Only then did he understand why most of the existing products on the market had this level, but it turned out that there was a limit in it.

Impossible! Liu Meng is not willing to admit defeat. At least he knows that Apple's music player is ahead of other products and takes up a little less space, but the sound quality is far higher than that of other players. Is it better to do the filtering process?

After the processing algorithm had no idea, Liu Meng had to switch to filtering and think about it. After trying it out, he found that filtering is actually the icing on the cake, and improving the sound quality is not obvious.

What exactly is the problem?

Liu Meng lost his mind for a moment, and couldn't help but touch his chin and frowned. This was his usual action when he had no idea.

Huang Sheng stared at Liu Meng in the surveillance screen. Seeing that he was really doing things seriously, he felt relieved, and couldn't help but feel proud. Hehe, thanks to my foresight, I forced this kid to stay. Judging from this posture, it was indeed possible to develop it.

Thinking of this, Huang Sheng also thought a lot. In addition to music players, should he develop electronic products such as mobile phones and cameras? Then isn’t I developed? In a few years, my assets will have hundreds of millions of dollars, and he will become a stolen figure in the Ice City? No, the whole of China is a stolen figure.

When he thought of these beautiful things, he became more courageous. He even thought about whether he could keep Liu Meng shut up for a long time and completely become his development machine.

Fat and bald, thin monkey, I won’t even be able to carry my shoes to me by then.

Huang Sheng was thinking happily, and Liu Meng, who was thinking in contemplation, suddenly jumped up. His stuck thinking finally found that glimmer and found a way to make a breakthrough.
Chapter completed!