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

Even the laser disc technology has nothing to do with computers.

In terms of technical principles, laser discs have two aspects, namely writing information and reading information.

To write information, a laser beam is used to focus on the optical disc medium to form a beam of about 1 micron in diameter. Small pits are burned on the optical disc. Each small pit and each flat area is a bit of information to indicate the data “1” and “0”.

Reading information is based on the difference in light reflection between pits and unablated areas. The laser is used to read the information, and the modulated laser beam is projected onto the disc medium. There are no pits. Most of the incident light returns. , Because of the depth of the pit, the reflected light and the incident light cancel out without returning.

In this way, the “0” and “1” information recorded on the optical disc medium are read out according to the difference in the reflection ability of the light beam.

Then in 1972, Philips of the Netherlands introduced the laser video disc machine and introduced the laser video disc system -LD, which is also called LaserVision Disc.

The LD-laser video disc records analog signals. The analog recording uses frequency modulation modulation. The disk space is very large. The storage method uses double-sided storage technology and double-sided playback technology.

However, the diameter of the LD-laser disc has reached 30 cm, and the laser disc machine is very bulky. Although in 1978, in order to reduce costs and lower the market circulation threshold, Philips established the standard of the LD format, but it is still because of its bulky and high cost. The price cannot be extended to households on a large scale.

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

Knowing what to do, Philips sold most of the copyright of the LD laser video format to Japan Pioneer.

After Japan Pioneer bought the format copyright, it launched the first LD player VP-7 in July last year, and combined with its own strength in the field of car audio, it is developing LD players for cars.

The report also wrote that after selling the copyright of the LD format, Philips is conducting research on new laser optical 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 matter, it is inevitable to register a patent in order to seize the level of technology. Therefore, even if you do not know the detailed technical principles after registering a patent, you can still guess the general category of the technology.

Therefore, Lu Chao can judge that it is not only the industry leader of Phillips in the world, but also companies such as Japan Sony, Japan Matsushita Electric Company, West Germany Siemens and other companies are conducting relevant research.

……

After closing the report, Xia Yu combined the memory in her mind and began to ponder, wondering how she should act.

Although Xia Yu is not proficient in optical disc technology, he has heard of it. After all, whether it is a later generation VCD player or Internet Age optical disc, it is subject to the yellow book standard and red book standard of optical discs.

However, these two standards are of later generation. 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 companies make standards, second-rate companies make brands, and third-rate companies make products!

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

I still remember previous life as if Philips and Sony jointly formulated the Red Book Standard and the Yellow Book Standard. This also enabled 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 more than one hour before get off work.

He stood up and said to Canning Fok: “Jianning, accompany me to see Lu Chao in the Tiangong Technology Laboratory. I have something to talk to him.”

Canning Fok knew that it was a report, so he happily promised, and then went with Xia Yu.

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

“Lu Court Academecian, the Board-Chairman is here, I want to talk to you about something!”

Canning Fok walked to Lu Chao and raised his voice, awakening Lu Chao.

The latter lifts the head, pushes the glasses that have slipped a little because of grease, and says to Xia Yu scorchingly, “Board-Chairman!”

Sure enough, as Canning Fok said before, Lu Chao’s beard is very long, and his hair is a bit messy, and there seems to be a yellow solid around the corner of his eyes.

It’s just that although his appearance is sloppy, the eyes under his glasses are unusually bright, showing his different looks, which impressed Xia Yu very deeply.

“Lu Court Academecian, stop for a moment. Let’s go to the office and sit and chat. I read the report you made and I want to discuss some ideas with you.”

Xia Yu said softly.

Hearing that it was a discussion, Lu Chao’s eyes became brighter. The Board-Chairman Xia Yu’s brain a few days ago gave him a great impact on his thoughts. Now he still has the opportunity to exchange ideas, and he has some expectations in his heart.

“Okay, Board-Chairman, I will turn off the instrument first.”

After speaking, he immediately turned around, turning off the instrument quickly.

Half a minute later, he came to the office with Xia Yu and Canning Fok.

As soon as he sat down, he asked impatiently: “Board-Chairman, is there anything wrong with my report?”

Xia Yu put the report on the desktop, smiled and shook his head and said, “The report is okay. The content is very detailed. You can see 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 refreshed, immediately opened the notebook he was holding when he came to the office, sat up straight, looked at Xia Yu with scorching eyes, and said, “Board-Chairman, you say!”

Xia Yu thought for a while, found an entry point and started talking.

“The LD laser video disc system uses analog signals and reads optical information. Although a 1 micron laser beam is used for recording, the area on the disc has been fixed. Even if it can be recorded on both sides, the information that can be stored is limited. , The amount of information storage is proportional to the large Small Accomplishment of the compact disc.”

“But the shortcomings are also obvious. They are very impressed with interference and noise, and because they are laser beam ablation, it is easy to shelter evil people and accept wrongdoing, and even cause signal errors due to scratches and contamination.”

“Of course, it is also obvious that it is too large. This is one of the reasons why the LD laser video disk cannot be promoted on a large scale. The combination of the laser video disk machine is too bulky.”

“For these, I have some ideas.”

“The most fundamental reason for these problems is actually because of the analog signal, which leads to inaccurate data reading, and is easily affected and leads to reading errors.”

“So can you develop a photoelectric conversion technology, such as pulse counting? Transcode the analog signal for digital processing, and then compress and record the transcoded digital signal on the optical disc, which can directly solve the shortcomings of interference and noise sensitivity. “

“Not only that, we can code each part of the information and determine the address. Just like a library, we can put the books of science, humanities, military, health, etc. into different bookshelves. When looking for information, You can find the information you need in the shortest time.”

“An error detection and error correction scheme can also be added to reduce the bit error rate.”

“In this way, we can store dozens or even 100 times the data in the same size disc, then the size and weight of the disc can be reduced, and the volume of home-style CD players and video players will be much smaller. , The market will reopen.”

“The laser disc has become smaller, and it should be enough to develop a portable player that plays the laser disc.”

“…”

Lu Chao was excited about the red color on the ground, loudly said: “Board-Chairman, your idea should be right. This is the right way. If we really develop the product, we will make a huge contribution to the world.”

“Not only the Walkman market, but the larger computer market will also have a huge impact.”

Xia Yu said with a light smile: “Lu Court Academecian, if I am not mistaken, Philips and Sony are already studying related technologies and have made some progress. If we want to catch up, do you think it will be difficult? Big?”

Lu Chao’s excitement instantly cooled down, and he frowned and thought quickly.

For a long time, he stretched his brows and said, “Board-Chairman, according to the information I collected, Philips and Sony’s patents should not have developed photoelectric conversion technology. Maybe they developed another technology. It’s hard to say.”

“Edison once said that genius is 99% of sweat plus 1% of inspiration, but that 1% of inspiration is the most important.”

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

“But my intuition tells me that your idea is correct, correct or not, you will know after experimenting. Our laboratory has global peak experimental facilities. The only restriction is the elites in the electronics field, but I can contact My classmates and friends may be able to find some people to come and develop together.”

“As long as they are willing to help me, I have a certain degree of confidence!”

Xia Yu immediately said: “Lu Court Academecian, the company has never been soft on talents. As long as you can recruit people, they will definitely be satisfied in terms of treatment, and they can calm down and do scientific research.”

Lu Chao nodded said: “I will call now!”

After speaking, he got up, ready to leave the office.

Xia Yu didn’t know whether to cry or laugh, and immediately said: “Lu Court Academecian, 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 trends of Philips and Sony when developing technologies. We must strive to become a leader and standard setter in this field, which determines the company’s future.”

“Apart from this, you recruit people as much as possible. CD-ROM technology represents the future, but tapes and walkmans can’t be left behind. Walkmans are the cash cow of technology research and development, do you understand?”

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

At this time, Canning Fok also said: “Board-Chairman, I will also strengthen supervision and speed up on the premise of maintaining quality and quantity.”

Xia Yu was nodded with satisfaction: “en!”

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

After Lu Chao left, Xia Yu took a sip of tea, leaned on the sofa, and said to Canning Fok, “Jianning, there is one thing you need to do.”

Canning Fok leaned forward slightly and said softly, “Board-Chairman, please give me your orders!”

Xia Yu opened the report, pointed to a location and said to Canning Fok: “You go and collect information about Japan Pioneer. Although the LD format laser disc system has drawbacks, it is not useless. There are differences in the industrial and automotive fields. Small potential, if appropriate, I am going to acquire it.”

Canning Fok received the report and focused on the words Japan Pioneer Company. Seriously nodded, he said, “Okay, I will arrange for someone to collect information right away.”

“en!”

“It’s almost off work, let’s go!”

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