You may encounter the issue of not fully rendering on the latest version of Firefox browser.Please see instructions to fix the problemWhile digital terrestrial television usually offers low signal latency, high latency Internet-based TV services cause the picture to play more slowly.Users now have a variety of TV viewing services to choose from with different transmission technologies.While analog technology is no longer active in Vietnam, TV viewing services now use digital technology, popular forms such as terrestrial digital television (DVB-T2 ), digital wired television (DVB-C2), satellite, IPTV or OTT.Here are some popular services and forms of TV signal transmission in Vietnam.Each form has its own latency, benefits, and drawbacks.DVB-T2 (Digital Video Broadcasting - Terrestrial 2) is used instead of analog television.With DVB-T2, the radio signal from the station's ground station is encoded in digital form.Next, they are received by the antenna, sent to a decoder for processing to display on the TV.A DVB-T2 receiver for older TVs.Photo: Tek Deeps.The advantages of terrestrial digital television such as higher resolution images than analog (from HD 720p or higher), providing many TV channels on the same frequency, no charge, large coverage, no quality affected by weather.DVB-T2 latency is lower than other common forms of transmission because the signal is transmitted directly from the station to the home decoder.Most TVs now have a built-in DVB-T2 decoder, so you just need to buy the antenna yourself and then tune in.DVB-T2 supports small antennas for indoor placement, however users are advised to mount outdoor antennas to receive more channels.For older TVs (manufactured before 2014), it is necessary to buy a DVB-T2 decoder that is widely sold on the Internet.Because it is provided for free, the number of TV channels for DVB-T2 is less than that of pay services, mainly including broadcast channels of VTV, VTC and local TV stations.The quality and number of channels depends on the location, orientation of the antenna and the type of cable connected.DVB-C2 stands for Digital Video Broadcasting - Cable 2. It is a digital transmission technology similar to DVB-T2, but DVB-C2 signals are transmitted from a service provider (cable TV network) to a receiver. set-top-box) and then to the TV via HDMI or AV.In Vietnam, some popular cable TV service providers such as SCTV, HTVC, VTVcab... To use DVB-C2, need to register with the provider to receive the receiver and pay the monthly fee.Some TVs have a built-in DVB-C2 decoder, so a receiver is not needed.Cable TV has low latency, costs a monthly fee, but adds a variety of channels.Photo: Instructables.Due to the fee, the number of TV channels of DVB-C2 is higher, there are a number of exclusive channels of suppliers, cooperation channels with third parties such as movie channels, football channels, etc. Users can split the signal to attached to multiple TVs but the quality will drop.The delay when watching TV channels between DVB-C2 and DVB-T2 is not too different, usually only 1-2 seconds difference.Some disadvantages of DVB-C2 include coverage area dependent on the carrier, some foreign channels transmitting via satellite may reduce quality due to weather.If the provider's system fails, users may lose signal and not be able to watch any channels.As the name suggests (Digital Video Broadcasting - Satellite 2), this form describes a digital signal that is transmitted to a satellite and replayed back to the ground.A parabolic antenna, also known as a pan, is used to capture the signal, which is sent to the decoder so that the image and sound are displayed on the TV.DVB-S2 is considered a premium service due to its higher investment costs compared to other forms.The advantage of DVB-S2 is its wide coverage area, stable and uniform signal, independent of terrain, so it can be installed in remote areas.A type of parabolic (pan) antenna used to receive television signals from satellites.Photo: Deadline.The delay of satellite TV will be higher than that of cable TV or terrestrial digital television because the signal is sent from the station to the satellite at an altitude of more than 35,000 m, and then returned to Earth.Some other disadvantages of satellite TV such as high investment costs, having to rotate the pan in the right direction and the signal can be affected if the weather is bad.Some popular satellite TV services such as HTV, K+, VTC or An Vien Television (AVG).Each service has different coverage and charges, some services also have exclusive channels.IPTV stands for Internet Protocol TV.With this protocol, the content is delivered to the TV through the Internet system which is secured and controlled by the service provider.In addition to the TV transmission system, providers need to invest in Internet infrastructure for IPTV.Some IPTV services are commonly used in Vietnam, such as FPT Play or VNPT's myTV.IPTV uses Internet infrastructure to transmit signals.Photo: Muvi.When subscribing to the service, users will receive a set-top-box to transfer the Internet signal to the TV.These devices support features such as viewing multiple channels at the same time, recording for program playback or integrating a video on demand service (Video on Demand - VOD).Not only on TV, some software on the computer also supports watching IPTV channels.However, the disadvantages of IPTV services include signal, latency, which depends entirely on the provider's Internet infrastructure, affecting image quality and program download speed.The latency of IPTV is also slower than that of cable TV.This is a relatively new form of television viewing but is widely used.Full name is Over the Top, this form uses a common Internet connection to broadcast content through a website or app.In other words, users only need an Internet-connected device to watch programs via the OTT protocol.With OTT services, users can watch television on many different devices.Photo: Xuan Sang.Some popular OTT TV viewing applications and services such as FPT Play, Netflix, VieOn, VTV Go, Apple TV... The services often allow free viewing of popular channels, which may require payment. to track copyrighted, exclusively produced content.Not only on TV, users can use OTT service on many devices such as smartphone, tablet or laptop.Similar to IPTV, the biggest disadvantage of OTT is that the quality depends on the Internet.The content on the OTT application is transferred from one digital source to another, going through many steps of packing and decompressing the signal, causing a large delay.In addition, the quality is also affected by Internet connection speed when there are too many people accessing or server failure.Some exclusive channels of cable TV are also not available on the OTT app.Transmission technology is the main cause of signal delay, creating a time difference between transmitters.Xiaomi is selling genuine TV products for the first time in Vietnam market.The newly launched P1 model is assembled at a domestic factory instead of imported CBU.The Neo QLED 2022 TV series features intelligent picture and sound enhancement, an NFT purchasing platform, and a range of innovative accessories.Current forms of TV signal transmission TV DVB-T2 DVB-S2 DVB-C2 IPTV OTT terrestrial TV cable satellite football receiver form technology delayE-magazine Online Knowledge Governing body: Vietnam Publishing Association Press license: No. 75/GP-BTTTT issued by the Ministry of Information and Communications on February 26, 2020 Deputy editor in charge: Lam Quang Hieu © All copyright belongs to Knowledge OnlineEditorial office: 7th floor, D29 Pham Van Bach, Cau Giay district, Hanoi Hotline: 0931.222.666 - Email: toasoan@zing.vnAbout usContact |Recruitment |Advertisement