Chapter 10: Images and Sound

Style: Science Author: Wen Geng JunchiWords: 1353Update Time: 24/01/12 03:57:34
The login verification program will give you a prompt, and you can get the props in the hut next to it.

They went into the hut and saw several tools. Cameras, tape recorders, glasses, etc.

Various black, white and blue data streams transform and flow in the air. Extending in all directions, the end point may be various interfaces.

Zhan Guyue said: "We can see the flow of data from various channels here. Can this be photographed?"

"Yes. There are some tools provided when you come in, including a camera."

Dong Chu took pictures with a camera and sent the images outside.

Qi Ao received the picture and saw many rows of numbers. The amount of data in each row is the same.

Gu Zhan asked: "Have you received it?"

"Received. It's rows of numbers, not pictures. I can't see the amount of data you mentioned."

"Huh? What we saw, what the camera captured, is different from what you saw?"

"Yeah. What's going on? Is the camera broken?"

Several people thought for a while. Qi Ao said: "The formats are different. What you see is one detection format, and the pictures we receive and the pictures taken by the camera are in another format."

Zhan Guyue said: "What you said makes sense. In many places, what we see in the computer world is different from the content transmitted to the outside. For example, in a picture, the computer may read rows of color values."

"What are these numbers?"

"Row after row of color values, right?"

"But there must be a line break mark. The picture is two-dimensional and scanned line by line. There should be a line break in each line. There should always be a mark at the end of each line."

"Are they the same distance, the same number?"

"could not find it."

"Can you divide the data into several categories?"

"Not at the moment. Let's take a rough look and can't find any common ground."

"We see it from one direction. The definition of taking a photo, is it taken from multiple directions?"

"I divided them into several parts. Look...it seems to be in different directions. It will take a long time to find the common parts, there is too much data."

"Is there still a sound?"

"Yes, I wonder if the information in these sounds can be found?"

"Use the recorder tool to send it out."

After waiting for a while, Qi'ao said: "I received it and turned these numbers into Doremi."

Then when it was played, it was all disorganized music.

"Turn numbers into audio data."

Then I played it back and it was still hard to listen to.

"Is it hard to hear?"

Liu Mozhi said: "No, it's more beautiful, like music."

There is a direct relationship between notes and frequency, that is, the higher the frequency, the higher the note, and the lower the frequency, the lower the note. Specifically, frequency refers to the number of vibrations of sound waves in a specific period of time, how many vibrations there may be per second, and musical notes describe how low the number of vibrations is. Generally speaking, the frequencies of each sound correspond to this, C - do - 261.6HZ, D-

e-293.6HZ, E-mi-329.6HZ, F-fa-349.2HZ, G-sol-392HZ, A-la-440HZ, B-si-493.8HZ.

"Ah, it seems that the sound information is received differently inside and outside the computer."

"Is it related to the sampling frequency? The sampling frequency is the number of samples per unit time. The greater the sampling frequency, the smaller the interval between sampling points, and the more realistic the digital sound will be, but the corresponding amount of data will increase and it will be difficult to process. The more difficult it becomes. Are the frequencies we measure too low? In the computing network, are the sounds heard at higher frequencies?"

"Then try increasing the frequency. It is already the highest sampling frequency, so the frequency of the sound information will not be that high. Could it be that it has reached the ultrasonic band."

The sampling frequency continued to increase until it reached the maximum value, but no useful information was still received.

"Is it related to the sampling size? The sampling size is the number of digits used to record the size of each sample value. It determines the dynamic range of sampling. The more digits there are, the more detailed the changes in sound can be recorded. The resulting data The quantity is also larger.”

"It is already 4 digits after the decimal point. It may not make much sense to continue to take values ​​backwards. I will continue to increase the number of sampling digits."

The number of sampling bits continued to increase until it reached the maximum value, but no useful information was still received.