With the increasing complexity of smart TV boxes in video and audio functions and entertainment experiences, mid- to high-end smart TV boxes carry rich interfaces. Do these interfaces seem to be simple and functional at a glance? Do you really understand them? For example, in addition to the expansion of mobile storage USB interface, you can also carry out USB wireless device expansion, HDMI in addition to the TV can also be used to decode the multi-channel audio track through the AV amplifier, AV interface can also be through the red and white interface external speakers...... HDMI Interface In the HD era of 1080P, HDMI developed very rapidly, but in that era, HDMI 1.4 was mainly used, and HDMI 1.4 was still the protagonist after 4K resolution. In the second half of 2016, HDMI 2.0 began in the 4K era. Extensive eruption, all new smart TV boxes listed this year are equipped with HDMI 2.0 interface. HDMI 2.0 has more bandwidth than HDMI 1.4, with the former being 18 Gbps and the latter being 10.2 Gbps, capable of transmitting 4K@60P, 32-channel audio tracks, supporting audio sample rates up to 1536 kHz, and being more feature-rich. No matter the 2.0 or 1.4 version of the HDMI interface, we usually use the most external TV and audio signals at the same time (since the TV has only the left and right stereo system, so only the left and right sound effects at this time), in fact, as long as the film source records HD video And HD audio track, HDMI interface can support up to 4K resolution transmission and 7.1 surround (or Dolby panorama sound) track information, can give the back-end AV function decoding output HDMI to the display device, and decode the surround sound track Output to a home theater system up to 7.1, resulting in a more immersive video experience. Fiber Audio There are some older AV amplifiers without HDMI input, but we also want to feel how good the surround sound is. At this time, we can use the audio output of the fiber to the AV amplifier to decode the audio, and the fiber audio transmission benefits from the stronger anti-interference ability of the fiber, especially the audiophiles, but the only bad thing is that the fiber audio can only transmit the highest Another advantage of a 5.1-channel audio signal, but also a smart TV box with both HDMI and fiber audio, is that we can output video to TV via HDMI, mute the TV, and transmit audio track information to the AV amplifier. Decoding, so as to achieve the separation of sound and picture, regardless of the quality of the picture or the sound quality is more pure. The AV output AV interface, also known as RCA, is divided into three lines: the audio interface (red and white lines, which make up the left and right channels) and the video interface (yellow), which dominated for years in the VCD and DVD eras until now. TV, player can still see its figure. In the smart TV box will generally have this interface, designed to be compatible with the old section of the TV, upgrade the old TV to become smart for one second. In addition to the above, in fact, there are AV interface box we can also "play" - if the North drift or South drift partner, you have a DIY desktop computer, can also have their own in the rental room " "TV", external computer monitor through HDMI, red and white RCA interface speaker (some models need to enter the system settings - open audio pass through, and the system settings - audio output mode - remove the HDMI option, check the CODEC option). USB interface USB interface is currently the mainstream version of the 2.0 version configuration is also a little higher 3.0 version, generally distinguish between black and blue (black is 2.0, blue is 3.0), the difference between the two is mainly different bandwidth, USB 2.0 The transfer rate has reached 480Mbps, converted to MB is 60MB/s, enough to meet the speed requirements of most peripherals. The theoretical speed of USB 3.0 is 5.0Gb/s, but it can only reach 50% of the theoretical value, which is also close to USB. Ten times that of 2.0, it is widely used in PC peripherals and consumer electronics products. USB interface is believed to be the most used by everyone, in the smart TV box through the USB interface to expand the mobile hard disk, load the U disk to install APK, if you encounter some large stream video, such as Blu-ray hard disk files (BDMV and BDISO) USB2.0 may be stuck, and USB3.0 can play smoothly. In addition to conventional applications, in fact, the external expansion performance of the USB interface is very good, for example, some of the boxes without LAN network interface, we can turn into a LAN network interface through a driveless USB network adapter, you can also external camera through the USB interface, so that you can in the smart TV box for QQ video chat. SATA interface now seems to have no clear boundaries between smart TV boxes and hard disk players. If you have to say, the SATA interface should be the "signature" of it. From the products currently available on the market, there are two built-in SATA interfaces. In this form, a hard disk (2.5-inch or 3.5-inch) with an external SATA interface appears on the SATA interface, and an external fixed-size hard disk appears in the hard disk drive. The mainstream SATA interface currently has two standards, namely 2.0 and 3.0, which are also different in bandwidth. The latest SATA3 transmission rate can reach 6Gb/s, while the SATA2 interface has a transmission rate of 3Gb/s (equivalent to 300MB/s interface rate). In theory, SATA3.0 interface is twice as much as SATA 2.0. It is worth mentioning that both SATA 2.0 and SATA 3.0 have much faster transfer speeds than USB, which may be why SATA interface is the difference between smart TV boxes and hard disk players. Smart TV/box information can focus on smart TV information network sofa butler (http://), China's influential TV box and smart TV website, providing information, communication, etc. on TV boxes, smart TVs, smart TV software, etc. Answering questions.