v3 Chapter 1127： There are 2 more questions!

Lu Chao said modestly: "Chairman, it is mainly your contribution."

After speaking, he explained: "The most difficult part of a technology is the experimental period of finding a path. It requires hundreds or even thousands of tests, and constantly explores to find the correct method and path. This starts from nothing. The exploration is the most labor-intensive and resource-intensive."

"But you have already told me about the principle of photoelectric conversion technology and pulse technology last time. According to the direction you said, we quickly found the correct R&D path, and the company is also constantly digging for scientific research talents to join, regardless of cost. Resources, so we can produce results so quickly."

Xia Yu suddenly understood.

It seems that the hanger he opened was used by Lu Chao.

But this also reflects Lu Chao's powerful ability. Knowing the principle is one thing, and being able to develop it from scratch is another.

"Dr. Lu, you don't have to be humble, to be able to develop it so quickly, you and your team have a huge contribution!"

He faced Huo Jianning as Lu Chao and said: "Jianning, remember these things. At the end of the year, you have to reward Dr. Lu and his team if you are rewarded. Don't be stingy."

"Okay, Chairman!"

Huo Jianning obediently responded.

A knowing smile appeared on Lu Chao's face. Although he doesn't love money, he also knows that other members of the team need money to live. The chairman can pay attention to this, which makes him feel very comfortable.

If you are in a good mood, you will naturally be motivated to work.

He said to Xia Yu with great interest: "Chairman, please follow me, the CD player is in another laboratory."

...

Soon, everyone came to the CD Walkman laboratory.

This time without Xia Yu, Lu Chao directly took out a sample of the CD player, and also took out a CD disc in a box.

The CD Walkman is different from ordinary portables. The most intuitive aspect is the shape. It is a box with a smaller thickness and similar length and width. There is also a circular lid on the surface that almost touches both sides. Xia Yu knows where it is. It’s a CD.

Sure enough, Lu Chao gave a presentation while giving an introduction.

He pressed a button, and the round cover on the CD player popped up. He introduced: "Chairman, the playing principle of this CD player is the same. Just put the CD in, change the cover and press Press the play button to play music."

"This CD has been burned into the song, I personally think the sound quality of the song is better than the vinyl record."

After speaking, Lu Chao put the CD record in, then pressed the play button, picked up the headset and handed it to Xia Yu.

After Xia Yu took it, he put it in his ear and closed his eyes to listen.

A minute later, he took off the headphones and said with a little satisfaction: "Yes, the sound quality is clearer than that of a vinyl record."

At this time, Lu Chao poured cold water and said: "Chairman, you and I think that the sound quality of CD records is better, but we have tested it before. Vinyl records and CD records burn the same songs, but after playing A few people think that the sound of CD records is distorted, not as real as vinyl records."

A comparison test has already been done!

This argument has emerged as soon as it was developed!

He remembered that in the past, the music industry and the audience had quarreled about the sound reproduction and distortion of CD records and vinyl records. It can be said that the public is justified, and there has never been a conclusive argument.

I don’t know what Lu Chao’s view of the researcher in the blink of an eye is?

He asked curiously: "Dr. Lu, do you think CD records are more distorted than vinyl records?"

Lu Chao shook his head without hesitation and said, "Of course not, I think CD records are more fidelity!"

Without waiting for Xia Yu's question, he directly stated the basis of his opinion.

"Chairman, I am making a dialectical comparison from a scientific point of view."

"In fact, as long as you understand the difference between the recording methods of CD records and vinyl records, you can make a clear and positive judgment."

"Vinyl is produced through the pattern of sound, electrical signal and mechanical signal. This process seems to have no loss, but in fact, the mechanical loss is particularly large in this step. Any mechanical transmission will be affected by the environment, temperature, gravity, etc. , The same problem exists when replaying vinyl records."

"The vinyl master tape must have the least loss. If you want to copy and burn again, the loss may only increase. Consumers can only get the copy and burn disc instead of the master tape."

"The CD is generated by digital sampling and recording of digital signals. There is indeed a loss in the sampling process, because the sampling rate determines the audio range, but the CD sampling rate is high enough to exceed the hearing range of the human ear, so from this point on It doesn't make sense to see the so-called \'lossy\'. What is lost is the part that is inaudible to human ears. This loss can be described as "clearly priced", and the entire CD system has no other losses except for this loss. "

"Of course there is also the loss of line equipment, but vinyl also has the same problem, so these points offset each other."

"Once the analog signal is digitized, it is lossless regardless of propagation, copying and recording. The data on the CD has sufficient redundancy and error correction functions to ensure that the copied disc and the master tape are exactly the same."

"So with the same equipment level, the sound quality of CD records is definitely better than that of vinyl records!"

After listening to Lu Chao's concise and clear analysis, Xia Yu suddenly understood.

In this analysis, it is true that the sound quality of CD records is better.

Of course, everyone's auditory system is different, and there are always people who have different, not to mention the existence of auditory illusions. This is destined to be controversial after being introduced to the market.

But a small number of people can just give up and assimilate slowly later!

After that, he read the product manual of this CD Walkman again, and learned that the model is Tiangong CD-P1, the body measurements are 130x140x17mm, the body weight is 290g, the headset weight is 18g, the power supply is two dry batteries, and the battery life For 8 hours, the maximum output power is 20mw+20mw, and the frequency response range is 40-22050Hz.

The upper limit of the frequency response range of the CD player is almost twice that of the vinyl player!

Generally speaking, in the range that the human ear can perceive, the larger the upper limit of the frequency response range, the more three-dimensional the sound heard.

This is a big selling point.

Xia Yu put down the Walkman and took out the CD alone. After looking at it, he asked, "Dr. Lu, are there any loopholes in the patent for CDs? To what extent have Sony and Philips researched it?"

After recalling it for a while, Lu Chao replied in detail: "Chairman, President Huo is very much due to this in terms of patents. Thanks to him, we can have a certain advantage in technology patents."

Xia Yu raised his eyebrows slightly and looked at Huo Jianning in surprise, but saw Huo Jianning smile modestly.

Xia Yu smiled and said, "Jianning, tell me how you did it?"

Huo Jianning said what he had done before: "In fact, I heard from Dr. Lu before that in the field of CD laser discs, many companies in the world are conducting research and development, but the pioneers are Sony and Philips in the Netherlands. The two companies established the Red Book standard in 1980, which is nothing but a CD-DA disc standard."

"The CD-DA disc standard contains many basic technologies for CD discs. Not all of these patented technologies are occupied by Philips and Sony, but the two companies have exchanged patents and exchanged with other companies in the world. Part of the patents, and then preemptively formulate the Red Book standard, ready to become the industry's standard setters, occupying the highest position."

"When the Red Book standard was just released, Sony and Philips took the lead, and other large companies were catching up. Therefore, they also need more companies to recognize the Red Book standard and fill the track as much as possible. Avoid other peer groups to establish another standard."

"At that time, we had not released the Tiangong SP-S1 Walkman, and the relationship with Philips and Sony was not bad. I applied to join the Red Book standard in advance, obtained the right to use the basic patented technology, and paid for some patents. "

"That's it."

As soon as Huo Jianning's voice fell, Lu Chao immediately said: "Combined with the technology of the Red Book standard, I have developed a CD-ROM format disc based on your guidance from the chairman."

"According to the news I heard, Sony and Philips are also doing related research and development, but I can be sure that they have not developed a finished product yet, and we are catching up."

"Because the patent is going to be registered, the news that we are studying the technology has inevitably leaked, causing hostility between Sony and Philips, but it doesn't matter now."

"I know."

Xia Yu said softly has understood the whole situation.

He smiled and praised Huo Jianning: "Jianning, you have done a good job of taking precautions!"

Huo Jianning said modestly: "Thank you for the compliment, the chairman. I learned this from you. I take three steps to do things.

Xia Yu couldn't help but smile.

Huo Jianning succeeded in stealing chickens, which avoided great trouble for Tiangong Electronics and solved the basic patent problem.

Fortunately, when Tiangong Electronics showed that humans and animals were harmless, it joined the Red Book standard and purchased patents. If this is the case, Tiangong Electronics will absolutely not be able to buy patents. Philips and Sony will absolutely block the technology and let the sky Industrial electronics has second-generation technology and cannot be commercialized.

"Of course, Dr. Lu, thanks to your research and development of the technology so quickly, you have worked hard!"

Xia Yu looked at Dr. Chao Lu again and said affirmatively.

Lu Chao replied humbly: "Chairman, researching technology is my duty, otherwise I would be ashamed to receive such a high salary from you."

Xia Yu smiled, no longer entangled in this, but asked the last key question.

"After listening to what you said, I probably understand it. In other words, this is a finished product. Can it be marketed?"

Hearing this question, Lu Chao looked helpless and looked at Huo Jianning.

Huo Jianning looked embarrassed and said, "Chairman, there are two more problems with this CD player. I can't make up my mind. I still need your instructions."

Xia Yu's eyes narrowed slightly, and he nodded slightly: "Let's talk about these two questions."

PS: I left the door, and I arrived home at more than 10:20 at night, so today I can only write 3,000 words in this chapter, and I will update it tomorrow.

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