The so-called digital TV is to convert the traditional analog TV signal into a digital signal represented by a binary number after sampling, quantization and encoding, and then perform various functions of processing, transmission, storage and recording, or it can also be processed by an electronic computer , Monitoring and control. Using digital technology not only enables various TV devices to obtain higher technical performance than the original analog devices, but also has new functions that analog technology cannot achieve. For example, random storage can be directly performed to make the retrieval of TV images very convenient. , Copying digital TV images and transmitting digital TV images on the network will not cause quality degradation, and it is easy to edit non-linear TV. Digital TV has brought TV technology into a new era.
Strictly speaking, digital TV is a new generation of TV that uses digital encoding and digital transmission technology from the recording, broadcasting, transmission and reception of TV programs, so-called all-digital TV system. For the convenience of calling, "all-digital TV" is simply referred to as "digital TV". It takes a long period of transition for digital TV broadcasting to replace analog TV broadcasting. During the transition period, digital TV and analog TV will coexist for a considerable period of time. Users who do not want to buy digital TV can also add a set-top box to the analog TV. The set-top box decodes the digital TV signal transmitted from the optical cable into analog video and audio signals, and then sends them to the analog TV's AV jack. , Users can watch digital TV programs.
According to the resolution, digital TV can be divided into high-definition TV (HDTV), standard-definition TV (SDTV) and VCD quality low-definition TV (LDTV).
Among them, standard definition television (SDTV, Standard DefiniTIon TV) 480 interlaced scanning, mainly corresponds to the resolution level of the existing television. In terms of sound processing, there are two channels of digital sound, with CD-level sound quality (currently analog TV has only one channel of sound, which can be converted into stereo after being processed by the circuit). Therefore, the quality of SDTV images and audio is improved compared to current analog TV, and its channel utilization rate is high. In the current analog TV, 4 sets (or more) of standard definition TV programs can be played simultaneously.
High-definition television (HDTV, High DefiniTIon TV) is the highest level, its image resolution can reach 35mm film level. The ITU-R definition for high-definition television services is: "High-definition television should be a transparent system, and a viewer with normal vision should see the image quality at three times the height of the display screen of the system. The impression of the original scene or performance ". Its horizontal and vertical resolution is about twice that of conventional TV. There are multiple digital sounds, in addition to good sound quality, it also has true surround sound. High-definition TV pictures can provide an amount of information equivalent to 5 times the standard-definition TV pictures.
In addition, the US Consumer Electronics Association (CEA, Consumer Electronics AssociaTIon) proposed a new concept of enhanced definition TV in the definition of digital TV. The American Consumer Electronics Association is a branch of the American Electronics Industry Alliance, which represents more than 600 manufacturers in the fields of audio-visual, communications and mobile electronic equipment. According to the standards published by the association, digital TV is divided into three categories: high-definition television (HDTV), enhanced-definition television (EDTV) and standard-definition television (SDTV).
High-definition televisions must have at least 720 line progressive or interlaced line scans, and the screen aspect ratio should be 16 to 9, using Dolby Digital audio, which can convert high-definition formats to other formats and can receive and display lower formats signal.
The enhanced definition TV must reach 480 line scans, which can change the format of 720 progressive and 1,080 interlaced into 480 progressive output, using Dolby digital audio.
The display scanning format of standard-definition television is lower than that of enhanced-definition television, that is, lower than the standard of progressive scanning of 480 lines.
A comprehensive selection of USB connectors are available with various combinations of form factors, interface and version types, vertical and horizontal configurations, as well as a unique new USB 2.0 Type-C charging option. Chances are Antenk have the right USB connector for you.
USB (Universal Serial Bus) was originally developed and introduced in 1996 as a way of setting up communication between a computer and peripheral devices by replacing many varieties of serial and parallel ports.
USB connectors have become the standard connection method for devices such as mice, keyboards, game pads & joysticks, scanners, digital cameras, printers and external hard drives.
Although designed for personal computers USB has become commonplace on other devices such as mobile phones, PDA's, video game consoles, AC power adaptors, memory sticks and mobile internet access dongles.
USB Connector Type
USB Type A
Also known as USB standard A connector, the USB A connector is primarily be used on host controllers in computers and hubs. USB-A socket is designed to provide a "downstream" connection intended for host controllers and hubs, rarely implemented as an "upstream" connector on a peripheral device. This is because USB host will supply a 5V DC power on the VBUS pin. As such, it is important to remember while purchasing USB cables it is safest to make sure at least one of the plugs is a USB A.
Though not that common, USB A male to A male cables are used by some implementers to make connections between two USB A style female port. Be aware that typical A-A cables are not intended for connection between two host computers or computer to hub.
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USB 2.0 A to C Cables
USB Type B
Also known as USB standard B connector, the B style connector is designed for USB peripherals, such as printer, upstream port on hub, or other larger peripheral devices. The primary reason for the development of USB B connectors were to allow the connection of peripheral devices without running the risk of connecting two host computers to one another. USB B type connector is still used today, though it is slowly being phased out in favor of more refined usb connector types.
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USB Type C
USB-C or USB Type-C connector is the newest USB interface came to the market along with the new USB 3.1 standard. Different from previously mentioned USB A type and B type connector, USB C Type connector can be used on both host controller ports and devices which use upstream sockets. In the last few years a numbers of laptops and cellphones have appeared on the market with C style USB connectors.
USB Type C connector is compatible with USB 2.0, 3.0, 3.1 Gen 1 and Gen 2 signals. A full feature USB 3.1 Gen 2 C to C cable is able to transmit data at maximum 10 Gbps with enhanced power delivery of up to 20V, 5A (100W) and to support DisplayPort and HDMI alternate mode to transfer video and audio signal.
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USB Mini B
Similar to USB B type connector, USB mini B sockets are used on USB peripheral devices, but in a smaller form factor. The mini B plug by default has 5 pins, including an extra ID pin to support USB On-The-Go (OTG), which allows mobile devices and other peripherals to act as a USB host.
Initially, this plug was designed for earlier models of smartphones, but as smartphones have become more compact and with sleeker profiles, the Mini USB plug has been replaced by the micro USB. Now, the Mini-B is designed for some digital cameras while the rest of the mini plugs series have become more of a legacy connectors as they are no longer certified for new products.
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USB Micro B
The micro USB B connector essentially a scaled down form of the mini USB which allowed mobile devices to get slimmer while still maintaining the ability to connect to computers and other hubs.
USB A-Type Connector, USB B-Type Connector, USB Type-C Connector, Micro-USB A Connector, Micro USB B Connector, USB Mini-b (5-pin) Connector, USB Mini-b (4-pin) Connector, USB 3.0 A-Type Connector, USB 3.0 B-Type Connector, USB 3.0 Micro B Connector
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