【 Weak current College 】 audio standard (THX Surround EX) resolution---Power By 【 China power house network 】

THX is a United States Lucasfilm company cinema with audio system known as the professional standard, THX is not a stand-alone playback system for Dolby Surround directional logic systems improvement, make the surround sound effect can be further enhanced.
THXSurroundEX in September 1999, the first for the movie star wars episode, is Dolby and have THX for Lucasfilm Ltd. (LucasFilm) cooperation in the field of the result, agreed by the professional, as authorized by Dolby and civil DolbyDigitalSurroundEX machine certification is to LucasFilm, called THXSURROUNDEX. Therefore, early market support DolbyDigitalSurroundEX decoding machine, Panel beating logo actually THXSURROUNDEX flag. THXSurroundEX and DolbyDigitalSurroundEX completely is built on the same technology.

Specifically, THXSurroundEX is a set of established on the basis of the 5.1 channel 6.1 or 7.1 channel system. Early THX is 5.1 channel system, it is very close and DolbyDigital5.1 channel (in fact they were built in Dolby Surround directional logic systems technology). This 5.1 system contains left, Center, right, left surround and right surround, and isolated from the lower-frequency signals 200Hz following the merger of the subwoofer channel, the total is 5.1 channel. THXSurroundEX this 5.1 channel system by adding one or two surround, it is placed in the middle of the original left and right surround, known as the rear surround, you can see, and in fact the same DolbyDigitalSurroundEX. THXSurroundEX will 5.1 channel becomes 6.1, 7.1 channel methods and the same are DolbyDigitalSurroundEX matrix encoding technology, the rear surround is the use of matrix encoding technology from left and right surround in separating out the rear surround channel. In other words, when you record audio, you put the rear surround channel to matrix encoding mixed with left and right surround, wait until the replay again to matrix decoding manner after the surround left and right surround channels. The advantage of this is that it contains more realistic from the top or side effects, flying with more stable sound like background music and film, so that the atmosphere in both the cinema or home appreciation has more harmonious surround effect.

You cannot fail to mention mentioned THX THX certification. THX certification on replay equipment, such as audio source, amplifier, speakers and even connect wire has a set of strict and specific requirements, meet this standard and the Lucas certification through the product, before granting THX logo. For home theater, the THX logo refers to the system's components, such as sound processor and speaker system that meets the Lucas companies (LucasFilm) THX and their unique treatment of parameters required for playback. So in short, "THX" is a kind of like ISO9001 certification specifications, it is a quality certification standards, with the identification of the home entertainment system hardware and software quality. Those with "THX" tag home entertainment system products have been a series of strict laboratory testing and listening test, these tests by Lucasfilm's experts.

At present there are THX certified THXSelect, THXUltra and THXUltra2 three. THXSelect designed for more than 2000 cubic feet of space (about 5.5 ping) service, THXUltra designed for more than 3000 cubic feet of space (about 8.3 ping). Simply put THXSelect provides budget limited consumer choice to provide a reference, THXUltra professional consumers. At present the latest certification is THXUltra2, this new specification is to full output 7.1 channel sound design, offers a very wide scale of sound field to cover a wider range of listening to the space and the tone balance between the channels of control for more delicate. In addition, performance is also required to promote low-impedance speaker capability and high noise ratio characteristics to correspond with the latest high-quality digital audio sources, this rigorous testing through to get THXULTRA2 certification. The following is every home THX audio systems are equipped with:

1. wait in line, the line main Re-equalization of feature films produced in the deliberately la high-frequency, again in back home theater play too sharp in sound, a complex phenomenon eliminates it on sound mixing procedure appears sound too sharp phenomenon was amended.

2. sound match the line of TimbreMatching function mainly in the provisioning of surround sound audio quality, and the former main channel sound interface more compliant, surround sound and is fully integrated into the surrounding the arena. Sound match is designed to bring your front speakers and listen to the environment of a technology, this is because in a typical home theater, only two surround speakers, instead of cinema in the full specification of the configuration.

3. solution of dependency line, this line main Decorrlation functionality is implemented in two side-channel two-way sound design of loudspeaker, regeneration and cinema more surround sound speakers the same effect. Solutions for dependency lines let you enjoy music with "stereoscopic" sound, even if the sound is played as a calendar, simplified and automated press disconnect will not affect the sound.

It is important to note that the product is obtained the THX certification does not represent the goods quality, THX certification achieved can only be said to represent their products under specific norms, can easily result in home theatre balance. After all, THX recognitionPermits are not compulsory, in fact it is a business tool — that is, developed by a specification, the collective marketing, monopoly of truth. Non-THX certification has many excellent products, your ability to know the hero.