Home theater area novice entry stickers [Home Theater Network HDAV.com.cn] The development of home audio-visual entertainment system to today is basically a period of steady development. As more and more advanced and mature acoustics and circuit theory and components are put into the application of home audio-visual systems, I believe that in the future, our home theater system will bring more comprehensive and rich audio and video enjoyment to all players. In addition, as society develops more and more mature, more and more consumers will no longer be satisfied with cheap incentives. Pursuing the perfection of the family and the soothing of the soul, the home audio-visual entertainment products just meet this demand. This post is a primary literacy sticker for new players who are ready to enter this field. First of all - whether you are going to buy about 5K of primary equipment or about 500K of custom fantasy equipment, you must realize that their essence is the same - all are received by the control system, the audio and video signals are processed and passed The process of replaying multichannel speakers. This type of system can be divided into integrated (ONE BOX) systems and complex systems by size and installation complexity. ONE BOX means that all components of the whole system, including the signal source to the speaker, come from the same package, which is very convenient for transportation and installation. For example, SONY's BDV 9150 system The complex system is what we need to elaborate in detail below. We need to use different brand product combinations to achieve a degree of user satisfaction through a certain degree of installation and debugging. --- Of course, with the continuous improvement of technology, the viewing and listening effects of all systems will gradually increase. The main components of the home theater system are as follows: 1, room --- yes -- if you have the ability to design and build a separate audio-visual room -- that room is your biggest toy, The decisive role here is the size ratio of the room. According to the room acoustic theory - the room with a specific length, width and height ratio can better match the sound system to reproduce the sound of better effect. If the room is already built - then there are only two choices, or let it be--this is the helpless choice of most living room parties; or by modifying it with acoustic elements --- Make it a special audio-visual room - this is also a big project. The above picture shows the test chart of the sound-absorbing panels on the inner wall of the room. It can be seen from the figure that laying sound-absorbing materials with different proportions can greatly improve the acoustic characteristics of the room. In this way, firstly, the sound absorbing material with a relatively sound absorption coefficient is laid at the first reflection point of the room, so that the acoustic characteristics of the room can be improved to some extent. If the amount of the sound absorbing material is continuously increased around the first reflection point or other reflection points, the sense of hearing can be better improved. The two figures on the room ratio are basically perfect 3D scale data. The following picture shows the interface of Apple APP---HTA Designer. Users can simulate the basic acoustic conditions and position according to the size of their own room. The above video is the basic situation of home theater decoration. The above video is a video of the sound insulation layer of the home theater. The sound insulation layer is laid in the wooden keel, which is very convenient. 2, display system (including all kinds of flat-panel TVs, projectors - the current popular is mainly 1080P resolution system, 4K and 8K resolution systems are brewing market) ----- Please move the projection panel or TV section in this section. 3, signal source (including Blu-ray, high-definition, HTPC, etc., corresponding to the display system - the current mainstream resolution of 1080P, 4K and 8K resolution system is brewing in the market) ------ Please pay attention to the HD machine section in this section. 4, audio and video control center --- that is, we often say that AV power amplifier (AVR - the meaning of this group of English abbreviation - video receiver) this name is a bit out of line with the trend of the times --- I define him as --- audio and video reception and control center! The mainstream products of this kind of audio and video reception and control center on the market are all functional integrated AV amplifier products: For example, Tianyi 9313HD, Tianlong X2000, Yamaha RX-A3010 and so on. High-end products generally package the signal receiving part and the audio-visual control part plus the audio-amplifying pre-stage circuit into a pre-audio product: For example: Marantz 8801, Mark Levinson 502, DataSat RS20i, etc. The necessary and basic functions of the AV preamp are as follows: 1, the choice of input source. , 2, volume control. , 3, multi-channel digital-to-analog conversion. , 4, signal control of the independent channel. , 5, multi-channel audio mixing correction processing. 6, low frequency processing. With the integration of acoustic engineering technology and home theater, room acoustic testing and debugging are receiving increasing attention. Even the performance of the AVR's built-in acoustic test module has become a major consideration for users to select products! These systems use the signal generator inside the amplifier to emit dividend noise and sweep signals through the speakers connected to the amplifier, and then pick up these echoes in the room through the test microphone. All kinds of direct sound signals and reflected sound signals, according to the different algorithms written under the guidance of the latest indoor acoustic theory, calculate the appropriate output signals of each speaker in the integrated DSP. The amplitude and delay values ​​ensure proper sound field coverage and accurate frequency connection near the listening position, allowing the user to experience a true sound field shock close to a large theater. The room acoustic modules built into the current mainstream AVR are as follows: Tianlong, Marantz and Anqiao brand and acoustic professional company Audyssey Odyssey have been using the Audyssey version of the test system Pioneer's unique MCACC system YAMAHA is the YAPO system SONY's Advanced Cinema Acoustic Calibration System DCAC (Digital Cinema Auto Calibration) The Anthem Room Correction Test System for the Hymns The integrated Anthem ARC system runs on top of the PC and is more functional than the other systems. Although the professional version of the Odyssey PRO function is also very powerful, However, it will never be deployed on the civilian version of the integrated AVR. The test MIC of the ARC system also looks very professional. Tianyi's acoustic automatic test calibration system is also very comprehensive, not lost to foreign technology. Tianyi professional test microphone The Tianyi test software runs on the PC. With the 9600HD combined with the AVR, it is easy to debug the crossover point and the frequency level of the digital crossover speaker. In addition to these mainstream integrated test systems, there are also some third-party test systems such as XTZ's integrated room acoustic test system running on PC and the famous free software REW. The above picture shows the XTZ test system interface. The XTZ system is simple and practical, and it is a weapon for room acoustic testing. (However, although the software is free, the hardware necessary for testing must be purchased separately, and the high-quality accessories also cost one or two thousand yuan). The multi-channel post-stage audio power amplifier is separately packaged and integrated into one integrated audio and video product: For example: Tianyi HD5250, Marantz MM8077, Simaudio MC-8 and so on. The forum has done a questionnaire about the shortcomings of today's AV amplifiers - the result is that the biggest weakness of the integrated AV amplifier is the lack of drive power. Think about it too - how can a 6,7 ​​watt main power transformer in a district support multi-channel full-power output of more than 100 watts? Therefore, it can be asserted that the current mainstream integrated AV amplifiers are not suitable for driving large-size and low-sensitivity floor-standing speakers if they are not connected. (My experience standard is a large floor box below 89DB). Therefore, if you want to push the big box, you must go to the later stage. 5, multi-channel speaker system - modern Blu-ray source audio mixing production is generally based on Dolby or DTS standards to mix recording material into multiple surround channels plus a low-frequency enhanced channel. The above video is the construction process of the multi-channel mixing production platform. With professional multi-channel audio processor, 46 surrounds, 13 tops, 4 separate subwoofers At present, the mainstream multi-channel home configuration is 5.1 or 7.1 up to 11.1 channels, and different authentication systems have different layout schemes. Here are some speaker layout diagrams, all kinds of different authentication systems are mostly similar Let's talk about the placement of the subwoofer. In the case of a small space, the position of the subwoofer can be judged according to the following steps. First place the subwoofer in the listening position Then walk around in the room, or test it back and forth with a test instrument. Compare the effects of different locations by listening or testing chart interpretation It may be affected by the room standing wave enhancement characteristics at different positions, and the low frequency reproduction effect is degraded in the listening position. Finally, you can find a good sense of hearing or test spectrum in a certain position in the room, so this position is a good position for the subwoofer. More fresh and fun home theater information, please pay attention to home theater network http:// (WeChat: cnhifi), the country's most influential home theater audio player interactive media website. Note: This article is transferred from the Home Appliances Alliance. The article is an independent view of the author and does not represent the position of the home theater network.
For diifferent USB types, micro USB, mini USB, etc. The logo, color or shape can all made as customers' requirement. With more than ten years of experience and capabilities assisting our customers in various industry, ETOP would be confident to be your qualified AVL and reliable manufacturing partner.
Related Products:usb cable,Micro Usb Cable,Usb Data Cable.
Data Cable,Data Flexible Electrical Magnetic Cable,Usb Data Cable,Micro Usb Cable,USB Connector ETOP WIREHARNESS LIMITED , https://www.etopwireharness.com
