Professional home theater debugging graphic tutorial

For many years, "fever" has been the "patent" of the ear. Once the enthusiasts describe the sense of hearing, they will be fluent in the thoughts, and the whispers will be whispered: or the clouds will be moving, and the hearts of the people will be shocked: or the beads will fall into the jade, and they will tell you how much the voice of a certain brother is magnetic. How a sister's nephew is like a glutinous rice dumpling; a CD film will have a cockroach into the recording studio in a few minutes, and must be equipped with enough grades to hear it; ... it is really irritating, and I can’t wait to experience it. However, when it comes to visual feelings, the inspiration is lost, the words are dry, and at the very least, the two words are clear and bright. It’s boring to talk about.

I don't want to degrade the pure music fever. I have long been a fan of music fever. Just want to say: The video field is an important part of the home theater, very interesting, if you are willing to go deep into it, the charm is no less than the sound of fever.

First, let's start with video debugging.

Professional home theater debugging graphic tutorial

Come see our environment

In order to have better debugging results, it is necessary to introduce some professional instruments. The following instrument is "Electronic inkfish".

Let the engineer lay off, professionally debug the home theater system

Electronic squid

Let the engineer lay off, professionally debug the home theater system

Electronic squid

Electronic inkfish plays an important role in the installation of the curtain. Usually, when installing the curtain, a horizontal line is to be determined, and if the accessories of the hanging curtain are not at the same level, the installed screen is liable to be inclined. The usual method is to measure by ruler. The usual basis may be the edge of the side wall or the lower edge. Then the sides of the house are not necessarily horizontal and vertical. It is also necessary to use "electronic inkfish" when determining some vertical lines. Using the "Electronic Inkfish" laser line, you can accurately determine the ceiling projection on the centerline of the screen, or you can use the above scale to make a 180-degree rotation to find the centerline where the projection is installed.

Those who do not have much to say in the installation. In the current adjustment process, "Electronic inkfish" can play a review.

Let the engineer lay off, professionally debug the home theater system

Tuning with electronic inkfish

Tuning with electronic inkfish

Usually the first step in adjusting the projection is to get a more complete picture.

The display is generally PJ, LCD, PDP, CRT, etc., and is still described by taking the 16:9 projection that is most commonly used in home theaters as an example.

Although collectively referred to as 16:9, in fact, the picture is actually different. The 16:9 is actually 1.778:1, and most of the current movies are 1.85:1 and 2.35:1. The boot screen of many disc players may not be the standard 16:9. Sometimes in the progressive and interlaced, double and non-multiplied modes, the boot screen will have some small changes. At the same time, the projected area of ​​the curtain is sometimes not exactly equal to 16:9, so sometimes the left and right sides of the screen just coincide with the edges of the curtain, but the upper and lower sides are not, or the upper and lower edges of the curtain are beyond the normal. Of course, this error is usually small and is generally within the scope of the license.

It should be noted that the position of the DLP projection will be higher when it is installed. The lens must face the center line of the screen, and the elevation angle of each DLP projector lens is different. If the screen is fixed, then if the projector is placed horizontally, It is only possible to have two heights that are most suitable and can hit the center of the curtain. In fact, very few people can be installed in these two space locations. For those who only want the effect of pure hair to do better, and for those who pay more attention to beauty, it is not easy to be placed in these positions. So usually the projection will have some tilt angle. In this way, trapezoidal distortion will occur.

Some enthusiasts prefer to have a trapezoidal shape and do not like to use the trapezoidal distortion adjustment control on the projector. My suggestion is that you can use some of them properly. After all, the picture of a rule is the most important. Of course, try to install it in a better position, which can reduce some trapezoidal adjustments.

Relatively speaking, LCD projectors are more convenient, and a wide range of lens movement functions are more convenient to place.

After having a regular widescreen screen, it's time to look inside. The general picture will be overscanned, especially the overscan of CRT display, LCD, PDP and PJ is controlled very low.

Let the engineer lay off, professionally debug the home theater system

The number of the corners of this test chart is the percentage of the overscan. PJ basically does not care too much about this.

Then there is the linearity inside the picture. Through these test pictures and the "electronic inkfish", it is still a bit linear distortion.

Let the engineer lay off, professionally debug the home theater system

Although not perfect enough, in fact it is basically impossible to completely match, but only through some adjustments to make it better.

You can also look at the screen projection through the ink fountain. The center speakers are on the same line. You can see that the center can be left, and you can see that the upper edge of the main speaker is at the same height.

Let the engineer lay off, professionally debug the home theater system

For audio systems, the listening environment is important. Similarly, in order to see good picture quality, in addition to good equipment, it is also necessary to establish a good audio-visual environment. Otherwise, the image quality will affect the morning, and the fatigue of the eyes in the morning.

The so-called viewing environment mainly refers to the direction of ambient light, temperature and color temperature, the color of the wall finish, the corresponding position of the viewer and the screen. The environmental requirements depend on the visual characteristics of the person.

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