MTL - The Science Fiction World of Xueba-Chapter 438 Video decoding chip

Pang Xuelin looked at the girl with a firm face in front of her, and thought for a while, and said, "Qing Qing, I'm sorry, but I still can't accept you."

Mu Qingqing smiled and said, "Big brother, all right, I will wait for you slowly."

"It's up to you!"

In Pang Xuelin's view, Mu Qingqing will go to Xiangjiang University next time. As time goes by, the meeting time between the two will decrease, and the other party will naturally forget himself gradually.

However, Mu Qingqing has made up his mind to go to Landa to study in a few months.

"Big Brother will be surprised and happy when he sees me at that time. Sincerely, the golden stone is open, and one day Big Brother will open up to me."

Mu Qingqing secretly cheered herself.

The two looked at each other and smiled, thinking that they had achieved their purpose.

Next, Pang Xuelin and Mu Qingqing strolled around the Pearl River and returned to Liu Fatzi's home.

At night, Fat Liu went home and told Pang Xuelin that he had arranged for him to cross the second line.

"Brother Pang, I have entrusted you to arrange it for you. At that time, someone will **** you. The snake head on the other side of the deep city will go in the path, and I will prepare this for you ..."

Then, Liu Fatzi took out two documents and handed them to Pang Xuelin.

"this is?"

Pang Xuelin took it over. The cover of one of them was written in gold on the cover of "Concession Pass to the Border Control Area", and the other was a temporary residence permit for the Shenzhen Special Economic Zone.

Liu Fatzi grinned: "Brother Pang, they are all fake. In case of a temporary inspection in them, these two fake cards will be used. The border card is too difficult to pass, it must go through the unit There are three procedures of political review, police station verification, and public security bureau's application for permits. If there is no unit, it will be even more difficult. It will require the neighborhood committee to review. The application procedures are very complicated ... "

Pang Xuelin smiled and said, "Lao Liu, please trouble you, right, when shall we go to Shencheng?"

Fat Liu said: "Looking at the arrangement over there, we should have another three or four days."

"Three or four days?" Pang Xuelin groaned for a moment and said, "That should be enough."

"What's enough?"

Fat Liu looked at Pang Xuelin puzzled.

Pang Xuelin smiled and said, "You will understand in two days."

In the early morning of the next day, Pang Xuelin went to Yangcheng Computer City again and brought back the packed components with a box.

After the invention of VCD, between 1994 and 1998, there was a peak period in China to transform CD into VCD.

In the past few years, a decoding board has grown hundreds of thousands. The earliest is a three-line decoder board. It requires your CD or optical drive to find the data in the DSP pins. There are a lot of companies' DSP chip lists. The main function pins are listed. Now, only the three wires of the decoder board connected to the CD servo board and the ground wire are required, and the decoder board can output the video of VCD. Later, in order to save lazy people, a front card was developed, which inputs RF ( (Also called EFM) The output is these three signals. After combining the two signals, it can be adapted to almost any well-known and unknown DSP. As long as this line can find RF, it can be solved.

But now, VCD has not been born, and the video decoder board is only available to the C-CUBE company founded by Chinese American Sun Yansheng.

Pang Xuelin had to make it himself.

Therefore, in addition to purchasing DSP chips, CD-ROMs, special transformer power supplies, capacitors, resistors and other components, Pang Xuelin also bought a single-chip microcomputer and an FPGA chip.

In addition, there are tools such as multimeters, soldering irons, fluxes, and tin wires.

When Pang Xuelin brought all these things back, Liu Qi and Mu Dong in the living room were curious.

"Brother Pang, what are you doing?"

Pang Xuelin smiled and said, "Be a gadget."

While talking, Pang Xuelin soldered these DSP chips, FPGA chips and other components to the microcontroller one by one with an electric soldering iron.

Later, Pang Xuelin looked up and said to Liu Qi, "Lao Liu, would you please unplug your phone and borrow it for me?"

"Telephone? What are you doing?"

Liu Qi was puzzled.

Pang Xuelin smiled and said, "You get it first, and I'll explain it to you when I'm done."

In the real world, there used to be such a paragraph about top hackers online.

A long time ago, in the WIN98 era, a netizen's system crashed. The netizen was a computer idiot, and his friend introduced him to a computer expert to help him repair the computer.

Because the other party did not have the WIN98 installation disk, the computer master asked him to give him the fixed telephone. He connected the empty end of the telephone line to a jack on the computer, entered DOS, and then started to stop the phone. Stop pressing the key.

He presses very fast, but only presses the 0 and 1 keys.

The netizen didn't understand what it was useful for, but he didn't dare to ask. After watching for more than half an hour, the computer master still kept pressing these two keys.

The netizen gradually became a little sleepy, poured a cup of tea for the computer, and went to sleep next door alone.

When I woke up, more than four hours had passed. The netizen got up next door and saw that the computer was being debugged in WIN98.

It was not until later that he gradually learned about computers, and finally understood that the master at that time had compiled a WIN98 system in machine language.

He later asked his friend about the whereabouts of the expert, and his friend said that after going to the United States a few years ago, there was no news.

At the beginning of the 21st century, this paragraph spread widely when the Internet first began to develop. Many netizens who were new to computers were longing for hackers.

Only later, with the popularity of the Internet, everyone gradually realized that it was impossible to write WIN98 in machine language.

But what Pang Xuelin has to do today is a similar job.

He intends to write video decoding related algorithms inside the FPGA and turn it into a video decoding chip.

The so-called FPGA, whose Chinese name is Field Programmable Logic Gate Array, actually belongs to a kind of semi-custom circuit in the application-specific integrated circuit, which can effectively solve the problem of the original device with a small number of gate circuits.

The basic structure of this chip includes a programmable input and output unit, a configurable logic block, a digital clock management module, an embedded block RAM, wiring resources, an embedded dedicated hard core, and an underlying functional unit.

Because FPGA has abundant wiring resources, repeatable programming and high integration, and low investment, it has been widely used in the field of digital circuit design.

The design flow of FPGA includes algorithm design, code simulation and design, board debugging, designers and actual needs to establish the algorithm architecture, use EDA to create a design scheme or HD to write design code, and ensure that the design scheme meets actual requirements through code simulation. Level debugging, download the relevant files to the FPGA chip using the configuration circuit, and verify the actual operation effect.

Pang Xuelin cut the interface of the telephone line short, and connected the two copper wires exposed inside to the interface on the single-chip microcomputer. Then, he started ticking the telephone.

Mu Dong came to see some famous halls, and was stunned: "Xiao Pang, what are you doing?"

Since seeing Mu Qingqing and Pang Xuelin talking about Xiao Lianlian coming back from the outside yesterday, Mu Dong came to call Pang Xuelin as Xiao Pang.

Pang Xuelin naturally didn't care too much.

Seeing Mu Dong's curious look, Pang Xuelin smiled and nodded: "Be a video decoding chip."

"Video decoding chip, what does this do?"

Pang Xuelin pointed to the side of the LD video player and said, "Professor Mu, I'll make a gadget similar to this. At that time, we will burn the video information to a CD and use one CD to play movies and TV shows."

Mu Dong came for a moment, and wondered, "Xiao Pang, don't we have a laser disc player? What's the use of making another one?"

Pang Xuelin laughed and said to Liu Qi, "Brother Liu, how much did you spend on this LD laser disc player?"

Liu Qi said: "More than eight thousand, I forgot how much."

"What about you discs?"

Liu Qi froze and said, "A piece is about four or five hundred."

Pang Xuelin said: "Do you know how much these parts I bought?"

"how much is it?"

"Less than a thousand and two, and if I make it and play it on a CD, a VCD disc costs only a few dollars!"

Mu Donglai and Liu Qi looked at each other with a shocked expression on their faces.

Liu Qi was surprised: "Brother Pang, is this what you want to do big business?"

Pang Xuelin laughed and said, "I also arrived at your house two days ago. When I saw these LD discs, I suddenly thought that in the past few years, it has been possible to compress a movie to six or seven hundred megabytes with MEPG technology. Size, can be burned to a CD disc. In this case, we can use ordinary CD players to input video signals to the TV, which has a similar effect to the LD player! You think about it, such a The cost of a disc player is only about one thousand, and the price of a disc can be reduced to less than ten dollars. If we launch him, is there a market? "

Liu Qi flushed with excitement and said, "This ... how can there be no market, this is a big deal!"

Immediately afterwards, he rubbed his hands, a little embarrassed and said, "That ... Brother Pang ... that ... I ..."

Pang Xuelin looked at Liu Qi with a smile, "Brother Liu, do you want to join in?"

Liu Qi laughed and said, "I mean, Pang ... Brother Pang, I'm willing to pay one million. You just need to ... just give me 10% of the shares!"

Mu Donglai and Mu Qingqing could not help but look at each other. According to Liu Fatzi, isn't this technology of Pang Xuelin directly worth nine million?

That's nine million!

In this era, although the value of nine million is not huge, it is enough to become the richest person in a city.

Even if Mu Donglai is a university professor, his income has increased year by year, and his family's savings are only a hundred thousand.

Pang Xuelin spent only one day buying a few electronic components to assemble it, and he had such a value.

This is too incredible!

Pang Xuelin said with a smile: "Brother Liu, let me wait until I complete the assembly of this VCD player. If the experiment is successful, you should consider investing. In addition, I will not take advantage of you. Since you have a million, I also make a million, plus my technology, you two me eight! "

Liu Qi shook with excitement on his face and said, "Okay Brother Pang, let's say so, but I'll take a share. Even so, I have already taken advantage. You are here first Busy here, I'll go and collect money now! "

Liu Qi turned and left directly.

Pang Xuelin couldn't help crying and laughing, but he never thought that this fat Liu Liu would be so decisive into the game.

At this time, Mu Qingqing looked at Pang Xuelin and said, "Big brother, are you entering the machine code by phone?"

Pang Xuelin smiled and nodded, "Qing Qing, do you know this?"

Mu Qingqing shook his head and said, "I do n’t understand very much. Last year we were selected to the National Team of the Physics Olympiad. When we were training at Tsinghua University, the teacher once told us some principles of computers. At that time, use punched tape to enter instructions, and you should be the same as you. "

Pang Xuelin nodded and smiled: "In principle, it's almost the same."

Mu Dong came to see for a while, and found it a bit boring, then he said: "Xiao Pang, then you are busy, I will not disturb you! Qing Qing, you talk to Xiao Pang less and bother him to write code."

"Know it!"

Mu Qingqing said.

Coming out of Pang Xuelin's room, Mu Dong thought about it, returned to his room, then picked up the phone on the bedside table and dialed a number to go out.

After a while, the call was answered: "Hey, who?"

"Lao Qi? I'm from east."

"Donglai, I am looking for you. Yesterday, you guy came to me with a single shot. Even Qingqing didn't take it. We haven't seen each other for so many years. It was too rude to eat in the school cafeteria yesterday. I told my wife today that I will make a good table at home this evening, and you will bring Qingqing to dinner at home. "

Mu Dong came: "Lao Qi, I didn't ask you for this. I have something to ask you. Didn't you do software engineering at Sun Yat-sen University? Do you know VCD?"

"VCD? What VCD?"

"It's a technology that burns movies and TV shows and the like to a CD disc ~ www.novelbuddy.com ~ and then connects to the TV through a CD player and plays it on the TV."

Qi Aimin frowned slightly and frowned, "Where did you get this idea?"

"Do you remember the amazing little guy I met on the train I told you yesterday, he said, and he is now making this machine himself, and it looks like he used the phone 0, 1 to the integrated circuit chip Injecting machine code ... I don't know much about this, so I want to ask you, is this stuff reliable? "

Qi Aimin froze for a long time, saying something inconceivable: "What do you mean, that little guy's phone input the machine language into the chip?"

"He seems to say so."

"Where do you live? I'll go to you now."

Mu Dong thought for a while and reported the address of Liu Qi's home to his old classmate.

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