• Classification of Network Cables

    Comparison of properties of Category 5 and Category 6 cables Category 5 cable (CAT5): Transmission frequency of 100 MHz, used for voice transmission and data transmission at a maximum rate of 100 Mbps, mainly for 100BASE-T and 10BASE-T networks. This is the most commonly used Ethernet cable. This type of cable has increased winding density and a high quality insulation material. Super Category 5 (CAT5e): Transmission frequency of 100MHz, mainly used for Gigabit Ethernet (1000Mbps). With low attenuation, less crosstalk, and higher attenuation to crosstalk ratio (ACR) and signal to noise ratio (StructuralReturn Loss), and smaller time delay, the performance is greatly improved. Category 6 wire (CAT6): transmission frequency of 250MHz, most suitable for applications with transmission rates higher than 1Gbps, mainly for Gigabit Ethernet (1000Mbps). Category 6 twisted-pair cable differs from Category 5 or Super Category 5 twisted-pair cable in appearance and structure. Not only does it add an insulated crossbone, placing each of the four pairs of twisted-pair wires in the four grooves of the crossbone, but the diameter of the cable is also thicker. Super Category 6 or 6A (CAT6A): The transmission frequency is 200 to 250 MHz, and the maximum transmission speed can also reach 1000 Mbps, which is mainly used in gigabit networks. Super Category 6 cable is an improved version of Category 6 cable, which is also an unshielded twisted pair cable specified in ANSI/EIA/TIA-568B.2 and ISO Category 6/Class E standards, with significant improvements in crosstalk, attenuation and signal-to-noise ratio. Category 7 cable (CAT7): …

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    Advantages of HDMI 2.1

    Many people believe that the device interface does not have much importance, in all honesty, input and output devices in the beginning of the design, as far as possible to carry the appropriate interface configuration, to display devices, for example, the panel supports the resolution and refresh rate are generally equipped with matching interface specifications, 1080P clarity of the display, there is really no need to carry the interface configuration to meet the 4K specifications, consumers in the choice of products The consumer does not need to make too tangled choice. However, we need to be aware that when increasing the resolution of the video signal, the amount of data in the signal increases. A 3,820×2,160 4K UltraHD signal sent over HDMI has about four times the data volume of an HD 1,920×1,080 signal. If you think of the cable as a water pipe, a larger pipe than 1080p is required to transmit a 4K signal. 2020 display new standard HDMI ushered in an important upgrade Back at CES 2017, HDMI announced the new HDMI 2.1 specification with a wire speed specification of 48Gbps, allowing image data of 8K/60 frames per second or 4K/120 frames per second to pass through. In addition, it can also bring gain to 4K TVs equipped with this interface. Upgraded specifications of external devices should require thicker cables The players are concerned that this year’s flagship TVs, have been equipped with refresh rate up to 120Hz panel, maintaining the color performance at the same time, …

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    Infinix Zero X: Supports 160W Quick Charge, 10 Minutes Full

    Currently, all cell phone manufacturers are upgrading their cell phone products in many way which includes a larger and larger screen size and ratio, a fast network transmission speed such as 5G and the large area coverage of the screen high refresh rate. The upgrading of mobile phone charging capability has also under the spotlight of various manufacturers and users. It is for this reason that a lot of brands have announced their own charging technology breakthroughs recently.It is reported that the common fast charging models on the market can support up to 120W fast charging, which enables it to fully charge users’ phone within 20 minutes. It’s said that OPPO is carrying out tests of 125W charging head. Meanwhile, in terms of wired charging technology, Xiaomi has also managed to break through to 200W, shortening the phone charging time to 8 minutes; in terms of wireless charging, Xiaomi has also come to the 120W. In addition to the above familiar brands, Infinix, the pure smartphone brand of King of Africa, has officially released the Infinix 2021 concept phone recently, also known as Infinix Zero X. It is the same phone that was earlier reported to be equipped with 160W wired fast charging, and also equipped with a dual color-changing electrochromic back cover. In terms of fast charging, it is said that the phone is not only equipped with 160W wired charging, which is officially advertised as being able to charge a phone equipped with a 4000mAh battery to 100% …

  • face recognition leads

    Face Recognition Leads to Hot Discussion! Expert Explanation

    Many software in the identity security authentication, face recognition is an important link. But do you really think that face recognition is just to shoot the “face”? Recently, the digital blogger revealed in the social platform: face recognition to collect the area is not only the screen display of the head, but the entire scope of the camera coverage. And the photos are uploaded to the backstage, where human reviewers can see them. Soon after, the hashtag # Facial Recognition Must Wear Clothes # was trending. Many exclaim that if that’s the case, they’re going to another planet. So can background reviewers really see more of us than our faces on the phone’s screen? In this regard, Professor Qiu Bo, director of the Department of Electronic Information Engineering, Hebei University of Technology, affirmed that “the image taken by face recognition must be all the areas covered by the camera field of vision, rather than just the part within the frame we see on the phone. This is a problem of basic common sense”. “From a technical point of view, the current face recognition technology does not require the storage of the original image.” According to Qiu Bo, the intelligent camera can extract the features of face images in real time and encode the faces, thus generating a face feature vector for transmission, storage and comparison operations. That is to say, the terminal machine, face have already turned into a string of Numbers, they can be said of the distance between …

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    Microsoft Officially Launched Windows 11 System, Seven Major Changes Detailed

    June 24, Microsoft officially released a new generation of operating system – Windows 11. This is also Microsoft after nearly 6 years again launched a new version of Windows system (the last time or July 29, 2015 launched Windows 10). With the launch of the new Windows system, the Windows logo has also changed, from the original see-through version of the logo into a square “田” logo, the new version of the logo you will like? And then look at what Windows 11 has changed in terms of features and appearance! 1、Redesigning The Interface Simplified interface design and user operation, more modern, neat and beautiful. The most obvious change is that the taskbar has come to a centered position. The start menu and taskbar are all new, and every sound, font, and icon is carefully designed. The new Sticky Layout, Sticky Groups, and Virtual Desktop features further enhance the multitasking processor and organize windows and optimize screen space. 2、Rapid Contact The taskbar is natively integrated with Teams, allowing you to connect with your friends via typing, chat, voice, and video, whether on Windows, Android, or iOS platforms. You can also turn on and off silent mode or start a presentation directly from the taskbar. Two-way SMS contact is also supported if the other party does not have the Teams app. 3、The Most Powerful Gaming Experience Ever The PC has always been one of the best platforms for gaming. According to Microsoft, Windows 11 unlocks the full potential of hardware, cutting-edge …

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    Photosensitive Epilepsy in Game And Video

    The friends who play the game all know that the opening of some games will have some introduction and matters needing attention. Most players don’t take much more than a glance at these prompts, as they do when they unthinkingly check the “User Guidelines” box. Just like ghost doesn’t crawl out of the computer screen and eat you.It’s just a game. It’s not life-threatening. Once upon a time, there were many TV viewers who had this idea, and they never knew that patients with a photosensitive disease would have severe epileptic reactions or even life-threatening seizures under certain conditions.It wasn’t until 1997 that a television accident in Japan completely renewed people’s understanding of the disease. 3D Dragon Event On December 16, 1997, at around 6:30 p.m., the First Season of Pokemon , which began airing in the same year and has become hugely popular in Japan, was scheduled to air episode 38, “Computer Warrior 3D Dragon,” on Thursday.It was broadcast on more than 37 television stations in Japan and tuned into 4.6 million households. At the time, this figure reached the highest ratings of the broadcast time period. However, when the video showed that the Pikachu destroyed the missile, some viewers began to have blurred vision, headache, dizziness and nausea, and some viewers even experienced severe symptoms such as epilepsy, blindness, convulsions and loss of consciousness. A total of 685 viewers(most of them children),were reportedly taken to emergency services by ambulance across the country, with more than 150 children later …

  • digital optical audio cable

    What is S/PDIF

    SPDIF (Sony/Philips Digital Interface) is the abbreviation of SONY, PHILIPS digital audio interface. In terms of transmission, SPDIF is divided into two types of output (SPDIF OUT) and input (SPDIF IN). Most of the sound card chips are able to support SPDIF OUT, but we need to note that not every product will provide a digital interface. There are relatively few sound card chips that support SPDIF IN, such as EMU10K1, YMF-744 and FM801-AU, CMI8738, etc. The typical application of SPDIF IN on a sound card is CD SPDIF, but not every sound card that supports SPDIF IN provides this interface either. In terms of transmission carrier, SPDIF is divided into coaxial and optical fiber two, in fact, they can transmit the same signal, only the carrier is different, the interface and the appearance of the cable also has differences. But the optical signal transmission is a popular trend in the future, its main advantage is that there is no need to consider the interface level and impedance issues, the interface is flexible and more resistant to interference. Transmission of digital sound signals through the SPDIF interface has become a common feature of the new generation of PCI sound cards. In the past, when CD-ROMs played records, music in digital format first had to go through D/A processing inside the optical drive. After being converted into an analog signal, it was transmitted to the sound card via the four-pin analog signal cable that we often use, and then a series …

  • DisplayPort-1

    DP 2.0 Prospect

    It’s been almost two years since the official announcement of the DisplayPort 2.0 interface protocol (collectively referred to as the DP2.0-equipped protocol below), but there was no information on the launch of related products until recently. According to the Video Electronics Standards Association (VESA), displays equipped with DP2.0 interfaces are being developed, while new products will use new system chips and are expected to debut in the second half of 2021. How powerful is the DP2.0 protocol? According to the design scheme when DP2.0 protocol was released in 19, it has a maximum transmission bandwidth of 80Gbps and a new 128/132b encoding mechanism. Compared to the previous generation DP1.4 protocol, DP2.0 protocol has 3 times higher data bandwidth performance and up to 97% improvement in efficiency. In addition compared to the latest HDMI 2.1 protocol, DP2.0 protocol is also 1.6 times higher transmission bandwidth performance. In addition DP2.0 protocol allows the signal to be carried on the USB4/Thunderbolt 4 interface, although it will be limited by the protocol performance of USB4/Thunderbolt 4, limited to a maximum transmission bandwidth of 40Gbps. The role of DP2.0 protocol With such excellent transmission performance, DP2.0 protocol can output 16K@60Hz (DSC), 10K@60Hz lossless, 4K@240Hz, and dual-screen 8K@120Hz video output on a single screen, while also supporting HDR-10 video features. Of course, game enthusiasts like the dual-screen 4K@144Hz lossless is also not in the picture. In short, the DP2.0 protocol allows for higher display resolutions, faster refresh rates, and support for dynamic HDR functionality, allowing for …

  • What is DLSS

    The whole process of DLSS is Deep Learning Super Sampling. By cooperating with game manufacturers, NVIDIA continuously deep learns in the cloud to optimize the algorithm for a certain game, and then runs on the local graphics card to update the algorithm so as to render the game screen more efficiently. Due to the continuous deep learning in the cloud, after a period of time, the game frame rate will also get higher and higher with the algorithm update. DLSS 2.0 offers three different image quality modes: quality mode, balanced mode, and performance mode. They can control the internal rendering resolution of the game, where the performance mode can achieve up to 4x super resolution, that is, in DLSS 2.0-enabled games you choose 4k resolution, but the graphics card will render at 1080p demand and then convert to 4k resolution through the super sampling algorithm, thus achieving 4k output and not affecting the image quality, even as Nvidia says, ” DLSS 2.0 tuned picture quality is more fine than the previous native picture quality”. So the frame rate can be significantly increased in 4k quality. Most games today are not output directly to the screen after rendering, but require a series of post-processing. For example, anti-aliasing features, including TAA time anti-aliasing, FXAA fast adaptive anti-aliasing, etc.. However, there are problems with these anti-aliasing or other image optimization features, such as causing blurring, incorrect processing of graphic elements, etc. For this type of problem, it is impossible to rely solely on …

  • What is Ray Tracing?

    Ray tracing is a technology that calculates the path of the visual field and finds the reflector and the corresponding light source to simulate the lighting effect. In the real world, when light shines on an object, some of the light is absorbed, some is reflected, and some is seen by the eye, and the presence of the object is recognized when the light reflected from the object and its surroundings is observed by the glasses. And ray tracing is to display the screen “lens” as the human eye, shooting invisible light to surrender the object in the screen, and then calculate whether it can match the light source in the screen, and according to the calculated light brightness of the screen to display. This technology concept was originally proposed in 1969 by IBM employee Arthur Appel prototype, in 1979 by Turner Whitted perfected the specific implementation of the idea and the way. The advent of ray tracing makes it possible to simulate light in the picture without calculating the global light, only need to calculate the part of the eye to view the content and then calculate it, significantly reducing the resources required to render the picture at the same level of light. Before the implementation of real-time ray tracing technology on personal computer graphics cards, games need to simulate light performance to enhance the game’s impact, but the computer’s performance can not support the amount of light computing, game developers have come up with a variety of ways …