At this time, laser disc technology has not yet developed to the CD stage, and is in the initial LD laser disc stage.

Even laser disc technology has nothing to do with computers.

In terms of technical principles, there are two aspects of laser discs, which are writing information and reading information.

Writing information is to use laser focus on the optical disc medium to form a beam of light with a diameter of about 1 micron, and burn small pits on the disc, each small pit and each flat ground is a bit of information, which is used to represent the data "1" and "0".

The reading information is based on the difference between the pit and the unablative area of the light reflection, the laser is used to read the information, and the modulated laser beam is projected onto the disc medium, without the recess, and most of the incident light returns, and in the recess, the reflected light and the incident light are offset and not returned due to the depth of the pit.

In this way, the "0" and "1" information recorded on the disc medium are read out according to the difference in the reflective capacity of the beam.

Then in 1972, the Dutch company Philips launched the laser disc machine and launched the laser disc system-LD, which is also known as LaserVisionDisc.

LD-laser video disc records analog signals, analog recordings use frequency modulation modulation, disc space is large, storage mode adopts double-sided storage technology, and there is also double-sided playback technology.

It's just that the diameter of the LD-laser disc has reached 30 centimeters, coupled with the laser disc machine, it is very bulky, although in 1978 Philips in order to reduce costs, reduce the threshold of market circulation, developed the standard of LD format, but because of its bulky and high price, can not be promoted to the family on a large scale.

Then at this time, the home tape machine appeared again, giving a major blow to the LD laser disc machine.

Knowing that it could not do so, Philips sold most of the rights to the LD laser disc format to Island Pioneer.

After the island pioneer company bought the format copyright, it launched the first LD player VP-1000 in July last year, and combined with its own strength in the field of car audio, it is developing an LD player for cars.

The report also wrote that after selling the copyright of the LD format, Philips is conducting research on new laser disc technology, mainly to solve the drawbacks of analog signals and develop a new generation of optical disc storage system.

Although technology research and development is a very secret thing, it is inevitable to register a patent in order to preempt the level of technology, so even if you don't know the detailed technical principle after registering a patent, you can still guess the approximate category of technology.

Therefore, Lu Chao can judge that now the world is not only the leader in the industry of Philip Company, but also the island country Sony Company, the island country Panasonic Company, West German Siemens Company and other companies are conducting relevant research.

......

After closing the report, Xia Yu combined the memories in his mind and began to ponder, pondering how he should act.

Although Xia Yu is not proficient in optical disc technology, he has heard of it, after all, whether it is the VCD machine that was popular in later generations or the optical disc in the Internet era, they are all subject to the yellow book standard and red book standard of optical discs.

But these two standards are for later generations, and after reading the report, Xia Yu can be sure that these two standards have not been established at all, and there is still a long time before they are established.

As the saying goes, first-class enterprises do standards, second-rate enterprises do brands, and third-rate enterprises do products!

Tiangong Electronics Co., Ltd. wants to be a giant in the field of optical disc and storage in the next few decades, and must not miss this opportunity to become an industry standard setter.

I still remember that in the previous life, it seems that Philips and Sony jointly formulated the Red Book standard and the Yellow Book standard, which also made it possible for these two companies to stand at the top of the pyramid to suck blood in the torrent of the information revolution.

Xia Yu looked at his watch and found that it was only ten o'clock, and there was still more than an hour before he got off work.

He stood up and said to Huo Jianning: "Jianning, accompany me to the Tiangong Science and Technology Laboratory to meet Lu Chao, I have something to talk to him about." ”

Huo Jianning knew that it was a report, so he happily agreed, and then accompanied Xia Yu to go together.

Soon, Xia Yu came to the Tiangong Science and Technology Laboratory again, and found Lu Chao who was concentrating on fiddling with a precision instrument inside.

"Dr. Lu, the chairman is here, and I want to talk to you about something!"

Huo Jianning walked up to Lu Chao and raised his voice and said, waking Lu Chao up.

The latter raised his head, pushed the glasses that had slipped a little because of the grease, and said to Xia Yu with burning eyes: "Chairman!"

Sure enough, just like Huo Jianning said before, Lu Chao's beard was very long, and his hair was a little messy, and there seemed to be a lump of yellow solids in the corner of his eye.

It's just that although he has a sloppy appearance, the eyes under his glasses are unusually bright, showing his different looks, which makes a deep impression on Xia Yu.

"Dr. Lu, stop for a moment, let's go to the office and sit and talk, I read your report and want to discuss some ideas with you. ”

Xia Yu said softly.

Hearing that it was a discussion, Lu Chao's eyes were brighter, the brain hole of Chairman Xia Yu a few days ago gave him a great impact on his thoughts, and now there is still an opportunity to exchange ideas, and he has some expectations in his heart.

"Okay, chairman, I'll turn off the instrument first. ”

After saying that, he immediately turned around and turned off the instrument with his hands and feet.

Half a minute later, he came to the office with Xia Yu and Huo Jianning.

As soon as he sat down, he couldn't wait to ask: "Chairman, is there anything wrong with my report?"

Xia Yu put the report on the table, shook his head with a smile and said: "The report is no problem, the content is very detailed, it can be seen that you are doing it very seriously, I want to talk to you about the future of laser discs, and what we can do!"

Lu Chao perked up, immediately opened the notebook he was holding when he came to the office, sat up straight, looked at Xia Yu with burning eyes, and said, "Chairman, you say!"

Xia Yu thought about it and found an entry point to say.

"The LD laser disc system uses an analog signal and reads optical information, although it is burned with a 1 micron laser beam, the area on the disc has been fixed, and even if it can be burned on both sides, the information that can be stored is limited, and the amount of information stored is proportional to the size of the disc. ”

"But the disadvantages are also obvious, it is very sensitive to interference and noise, and because it is a laser beam ablation, it is easy to hide dirt and dirt, and even cause signal errors due to scratches and stains. ”

"Of course, there is also an obvious point, that is, the volume is too large, which is one of the reasons why the LD laser disc cannot be promoted on a large scale, and the combination of the laser disc machine is too bulky. ”

"I have some ideas for that. ”

"The root cause of these problems is actually the inaccurate reading of data due to analog signals, and it is easy to be affected and lead to reading errors. ”

"So can we develop a photoelectric conversion technology, such as pulse counting? Digitize the analog signal transcoding, and then compress and record the transcoded digital signal to the optical disc, which can directly solve the shortcomings of interference and noise sensitivity. ”

"Not only that, but we can encode and address each part of the information, just like a library, and put scientific, humanities, military, health and other kinds of books on different shelves, and when you want to find information, you can find the information you need in the shortest possible time. ”

"There is also an additional solution for error detection and error correction that can reduce the bit error rate. ”

"In this way, in the same size of the disc, we can store dozens or even hundreds of times the data, then the size and weight of the disc can be reduced, the size of the home laser record player and video player will be much smaller, and the market will reopen. ”

"The laser disc has become smaller, which should be enough to develop a Walkman to play the laser disc. ”

“......”

Lu Chao flushed excitedly, and said loudly: "Chairman, your idea should be right, this is the right way, if we really develop the product, then it will make a great contribution to the world." ”

"Not only the walkman market, but also the much larger computer market will have a huge impact. ”

Xia Yu smiled lightly and said: "Dr. Lu, if I guess correctly, Philips and Sony are already researching related technologies, and have made some progress, if we want to catch up, do you think it is difficult?"

Lu Chao's originally excited mood instantly cooled, and he frowned and thought quickly.

After a long time, he frowned and said: "Chairman, according to the information I have collected, the patents applied for by Philips and Sony should not have developed photoelectric conversion technology, and it is difficult to say that they have developed another technology. ”

"Thomas Edison once said that genius is 99 percent perspiration and 1 percent inspiration, but that 1 percent inspiration is the most important thing. ”

"Since Philips and Sony have not developed the technology for several years, it will definitely not be a problem of scientific research strength, it should not be a problem of scientific research strength, it should be that they have not found the right direction, and they are still experimenting and groping one by one. ”

"But my intuition tells me that your thinking is right, right or not, after experimenting, you will know that our laboratory has the world's top experimental facilities, and the only thing that can be regarded as a constraint is the elite in the field of electronics, but I can contact my classmates and friends, and maybe I can find some people to come and develop together. ”

"As long as they are willing to help me, I have a certain amount of confidence!"

Xia Yu immediately said: "Dr. Lu, the company has never been soft on talents, as long as you can poach people, then they will definitely be satisfied in terms of treatment, and they can also calm down to do scientific research." ”

Lu Chao nodded and said, "I'll call now!"

With that, he got up and prepared to leave the office.

Xia Yu couldn't cry or laugh a little, and immediately said: "Dr. Lu, you sit down first, don't worry, I still have something to say." ”

Lu Chao sat down again and looked straight at Xia Yu.

Xia Yu continued: "I suggest that you pay close attention to the movements of Philips and Sony when developing technology, and we strive to become a leader and standard-setter in this field, which determines the future of the company. ”

"In addition to that, you recruit as many people as possible, optical disc technology represents the future, but tapes and Walkman can't be left behind, Walkman is the cash cow of technology development, do you understand?"

Lu Chao took a deep breath, nodded heavily and said: "Chairman, I understand what you said, the research and development of the Walkman has not stopped, and I will realize your idea as soon as possible." ”

At this time, Huo Jianning also said loudly: "Chairman, I will also strengthen supervision and speed up on the premise of quality and quantity." ”

Xia Yu nodded with satisfaction: "Hmm!"

chatted with Lu Chao for a while, and found that Lu Chao was obviously a little absent-minded, he should be thinking about technology, Xia Yu simply sent him away.

After Lu Chao left, Xia Yu took a sip of tea, leaned on the sofa, and said to Huo Jianning: "Jianning, there is something you need to do. ”

Huo Jianning leaned forward slightly, and said softly: "Chairman, please command!"

Xia Yu flipped through the report, pointed to a location and said to Huo Jianning: "You go and collect the information of the island country pioneer company, although the LD format laser disc system has drawbacks, but it is not useless, it has a lot of potential in the industrial field and the automotive field, if it is suitable, I am ready to acquire it." ”

Huo Jianning took the report, focused on the words of the Island Country Pioneer Company, nodded solemnly and said, "Okay, I will arrange someone to collect information immediately." ”

"Hmm!"

"It's almost time to get off work, let's go!"