Coquettish Rebirth

() That's right!Jia Hongjian thought so at the beginning!Everything in front of him was planned in advance by him!No wonder!Even if Jia Hongjian was a reborn person, how could he so miraculously anticipate a sudden discovery in the next few years?Even if he knew about this kind of thing, it's useless if he didn't expect it!He really didn't think of this before, but because he was very interested in Huawei and Mr. Ni's idea of ​​ict integration, so he invested in this aspect, but who knew that he really had a chance in this aspect? In fact, to put it bluntly, ic, Many IT fields are related. This program-controlled switch is a changed router, and the cable TV network, isn't it just a changed telecommunication network?The cores are all the same, and they all transmit data through the line. The difference is that the data is different from the data. . .

Looking at a group of powerful people around here, a group of powerful people who are all academicians looked at him in surprise and admiration, but Jia Hongjian didn't pretend to be aggressive, just shook his head with a smile, "Masters, don't look at him like that. Look at me, boy, how can I be able to do it? How could it be possible to plan it a few years in advance? It’s just good luck. Mr. Ni has been helping me, which has allowed our company to have enough technical reserves. The continuous accumulation of technical reserves has reached After a new level, we may have new opportunities, right?"

Jia Hongjian told the truth sincerely. He didn't need to pretend to be forceful in this regard. After all, the people in front of him are all powerful people in related fields. They are all grandparents. Mr. Zhang, who has graduated and entered the national government fuzhong yang research institute, is here. Is it necessary for him, a junior, to pretend to be aggressive?This really needs to be pretended.That old man who has been on the battlefield for a long time can tell at a glance!It's better not to pretend! . .

Here, after Jia Hongjian chose to be honest, the old men's affection for Jia Hongjian immediately rose to another level. "Okay, okay, not arrogant or impetuous, winning or losing and not discouraged, this is what a child in the new era should look like! Good, good!" Mr. Zhang said two good things in a row, obviously admiring Jia Hongjian. look.

At this time, the door of Mr. Zhang's house was knocked, and then the son of Mr. Zhang brought in two young people who looked about 30 years old. "Hello teacher, hello principal. Hello old gentleman." After the two doctoral students greeted each other in a circle.One of them asked the old man, "Teacher, why did you ask us to come?"

"You guys came just in time, come here. I'll give you two a task. This is..." Mr. Zhang didn't remember the full name of the little friend Jia in front of him until now.Jia Hongjian is also very colorful.He smiled. "Jia Hongjian." "Yes, you are here to conduct a survey according to Jia Hongjian's request. The main purpose is to investigate the technical transformation of the domestic cable TV network, how much investment will be required to change it to two-way communication, and what ideas do you need? After assigning tasks to the two doctoral students here, the old man turned his head and said to Jia Hongjian, "Xiao Hongjian, these two are my doctoral students who are following me. They are brothers. This one is called Chen Zhongjun, and this one is called Chen Zhongyuan, these two people will be lent to you temporarily, and if you have any requirements, you can ask them..."

In this way, these two Ph.D. students were placed under Jia Hongjian's banner and ordered by Jia Hongjian.Here, Jia Hongjian first thanked Mr. Zhang, and then assigned tasks to the two doctors on the spot, that is, the entire transformation process, what things are needed, how much investment is needed, what kind of hardware and software are needed, etc. , and even whether there are any technical difficulties after the transformation.

After assigning tasks to the two doctors in front of the old man, the matter is over.Jia Hongjian invited two doctors to have a meal here, which was regarded as a meeting gift.After having dinner here, Ye Jing returned to the company and found something, "Hung-chien, a colleague from the United States has received news that there will be a communication exhibition in the United States at the end of this year. At the exhibition, there will be about [-] or [-] American companies exhibiting their own modems, that is, modems for cable TV networks. Seeing that they all have [-] or [-] manufacturers to exhibit, I guess this thing will not be very difficult Big? We Huaxia Hi-Tech should be able to develop it ourselves?"

"That's for sure. Isn't this thing a cat to put it bluntly? What's the problem? The modem, if I remember correctly, should be a thing that converts digital signals into analog signals? By the way, digital signals are Things like 1, 0,0,1, [-], [-], and analog signals... are waveforms like radio waves, right?" Jia Hongjian learned some computer basics in his previous life, and he can still remember some of them now, which is not bad.

"Well, that's the way it is said. The teacher taught me this way when I was in college. What's the matter?" Ye Jing asked. She didn't intend to ask, but she found that Jia Hongjian suddenly fell silent after asking. , as if suddenly thought of something.

At this time, Jia Hongjian said suddenly, "Computers use digital signals. Cables can transmit not only analog electrical signals, but also digital signals, right? Then, theoretically, we don't need a modem to transmit this signal." The digital signal in the computer is converted into an analog signal!" What he said immediately made Ye Jing realize that something was wrong. According to what she learned in mit, the modem access to the Internet is actually because the traditional telephone line only uses To transmit the pulse signal is the telephone signal, so if you want to transmit the digital signal through the twisted pair of the telephone, it must be converted into a pulse signal, that is, the analog signal is an audio voltage signal in technical terms.Moreover, the program-controlled switch can only be interpreted by receiving the voltage signal, so if you use the telecommunications network to surf the Internet in this era, you need a modem.

According to Jia Hongjian, if digital signals are transmitted in cable TV lines such as coaxial optical cables, then basically no cats are needed!Even if the current analog signal televisions cannot read digital signals, they can rely on the set-top boxes made by Jia Hongjian to decode them. Isn’t it enough to convert them into analog signals and then output them to the TV?

At this time, Jia Hongjian had just thought of this, but he immediately rejected his idea. "Forget it, let's get a cat, there's no need to digitize it." As soon as he finished speaking, he saw Ye Jing's surprised eyes, so he explained with a smile, "We are capitalists now, so there is no need to do it in one step. It's nothing In the case of competitors, sometimes we still have to deliberately produce an incomplete product, so that there will be upgrades in the future, right?"

This is true, if everything is ready for digitization now, and even the set-top box integrates the digitization and decoding into analog signals, and even prepares a direct digital video signal output port on the set-top box, then in the future Is it true that after the TV is digitized, there is no need to replace the set-top box?Is it possible to continue to use the old set-top boxes of Huaxia Hi-Tech after ten years?This is not good for Huaxia Hi-Tech's product sales!As a capitalist, Jia Hongjian is not as black-hearted as others. He didn't think about harming the health of consumers. He even thought about providing products to consumers as cheaply as possible. These small things let Jia Hongjian earn more money, which is fine. ?As a capitalist, he can't be like a real father and mother, giving consumers good and cheap things, and even blocking his own way to make money in the future?

Therefore, Jia Hongjian obviously wanted to get a so-called cable modem like the ones in the United States, and use this method to use the cable TV network without transforming the analog line into a digital line.

After Jia Hongjian and Ye Jing returned to China, they rested in Shanghai for a few days, while on the other side, the two brothers and doctoral students quickly finished their research.According to their research, basically the existing cable TV network does not need to be modified, basically just add one on the client side, that is, a cable modem, and then arrange a cmst, that is, a cable modem termination system. ok.This so-called termination system is similar to a telecom program-controlled switchboard, used to separate and distinguish uplink signals.As long as these two things are installed, the cable TV network of this era can be directly transformed into a two-way system!Moreover, the initial investment is very small, and even the amount of renovation work is very small!According to the 550mhz cable TV communication frequency that is common in big cities, the original line can transmit 22 standard channels plus 37 supplementary channels, which is a total of 59 channels!Obviously, there are not so many channels in China, and there will not be any in the future. Finally, if 40 channels are reserved and the bandwidth of the other 19 channels is used to transmit network and on-demand content, it can basically guarantee a standard 320*240 resolution on-demand At the same time as high-speed video resources, there is also a downlink network speed of 1m, which means that the speed of optical download can reach 128k!

Even if the compression mode is adopted at the video end, then it is only necessary to add a signal amplifier with a price of about 20 yuan, or a decompressor, to the port of every 4000 households, which can double the network speed and video-on-demand. Number of shows!It’s not even a problem for a few TVs in a family to access the Internet and two or three TVs on demand!

And such a transformation, regardless of the cmst and cable modem, the monthly cable TV fee of a household only needs to rise from 8 yuan to 11 yuan to solve it!Isn't that cheap?Isn't that a lot of investment? (To be continued.)