Dvb-T Analog

Home / cultivate / Technical sources / ATSC vs. NTSC vs. QAM vs. DVB-T vs. ISDB-Tb – understanding TV Signals

It’s complicated out there! Some des the technical language relating to purchasing a TV or TV tuner can seem difficult. It is common to lakers terms choose ATSC, NTSC, und QAM gift used, und it zu sein important zu understand what every term means und what ns difference is betwee each des them.

Du schaust: Dvb-t analog

But first, it zu sein important kommen sie understand the TV signals are usually received in one of two ways, either by antenna or cable:

The terms NTSC und ATSC relate to TV signals that are received over the air (known together OTA), using in antenna or aerial. Bei old analog antenna wollen pick hoch NTSC signals, however you möchte need a newer, digital antenna zu pick trost ATSC signals.QAM refers zu TV signals that are received durch cable.

And second, it’s deshalb important zu understand that the worldwide broadcasting layouts are notfall standardized – various parts von the welt use different formats which adds to the confusion und the abundance des letters – ATSC, NTSC, QAM… and many more.


There are a last of colors on this maps. The hauptsächlich ones to understand are:

Countries wherein ATSC and QAM space actively an use
Countries where DVB-T/DVB-T2 space actively bei use
Countries where ISDB-T ist actively in use
OTHER COLORSOther bizarre formats, or nations transitioning indigenous one format kommen sie another

 What ist NTSC?

NTSC stands zum the national Television system Committee, which to be the kopieren, gruppe who introduced ns original standards for analog TV transmission in the USA zurück back an the beforehand 1940s. NTSC is generally used to refer to the alt analog signal i beg your pardon was zuerst adopted in the USA in the 1940s. It has largely been phased out an favor von digital ATSC broadcasting. NTSC is inferior zu ATSC, as it zu sein doesn’t supply HDTV gemälde quality, or die widescreen format. Audio audio high quality is deshalb inferior.

As fine as die USA und Canada, the NTSC system was or is used in Central America, ns Caribbean, parts des South America, and in several asian countries including Japan. High-power OTA NTSC broadcasting was switched off an 2009 in the USA, and in 2011 it was discontinued bei Canada und most von the other countries.

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 What ist ATSC?

ATSC stands weil das the progressed Television systems Committee, which ist the group that replaced ns NTSC in the USA an 1982. ATSC ist the OTA digital signal used an the USA. It is superior to the old NTSC analog system because it tun können deliver HDTV foto quality in a wide screen format, and being capable von providing theater quality audio.

To use in analog TV with ATSC you need a converter that is capable des handling the digital signal. Ns Federal communication Commission (FCC) need that all new TVs have built-in ATSC tuners.

 What is QAM?

QAM stands zum Quadrature Amplitude Modulation. QAM is essentially die cable version des ATSC, v QAM tuners permitting your TV to receive unencrypted digital signal from a cable provider (a cable box is required for the encrypted ones). In die cable tv industry, QAM systems are supplied by Multi-System operators (MSOs), und other network operators to provide video, voice and data services. QAM systems are the mechanisms whereby signals space processed and distributed over a cable system und to be delivered to subscribers’ homes where set top boxes und cable modems convert ns QAM signals rückseitig into useful voice, data and video.

This way that you generally wollen get free, usually neighborhood cable channels with a QAM tuner, yet you will need a cable kasten or cable card zu get die channels that room provided von the cable television providers.

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 What is DVB-T?

DVB-T stands for Digital video Broadcast – Terrestrial, and is the jetzt the most common system used bei Africa. Set-top boxes used von South Africa-based DSTV or Multi-Choice TV bei a number des sub-Saharan African countries are based on this standard. Many (but notfall all) HDTV system that space compliant with ns ATSC typical are so compliant with the DVB-T standard.

 What ist ISDB-T?

ISDB was standing for Integrated service Digital Broadcasting, and there room three types von ISDB – ISDB-S (satellite television), ISDB-T (terrestrial), ISDB-C (cable). All ISDB broadcasting zu sein based on MPEG-2 or MPEG-4 standard zum multiplexing with transport stream structure and video and audio coding (MPEG-2 or H.264), und are capable von high definition television (HDTV) und standard definition television

Is there a global High justiz Encoder that works through all des these formats in all von these places?

Fortunately, over there is. The Multicom MUL-HDENC-C-200 single Channel Deluxe Digital Encoder Kit comes in the complying with options:

MUL-HDENC-C-200-NA – Single Channel deluxe HD Digital Encoder Kit, HDMI/Composite/Component Input, ATSC/J.83B QAM/DVB-T/ISDB-Tb output, CC, EAS, Default USA: QAMMUL-HDENC-C-200-MX – Single Channel deluxe HD Digital Encoder Kit, HDMI/Composite/Component Input, ATSC/J.83B QAM/DVB-T/ISDB-Tb output, CC, EAS, Default MEXICO: ATSCMUL-HDENC-C-200-CO – Single Channel luxurious HD Digital Encoder Kit, HDMI/Composite/Component Input, ATSC/J.83B QAM/DVB-T/ISDB-Tb output, CC, EAS, Default COLOMBIA: DVB-TMUL-HDENC-C-200-LA – Single Channel deluxe HD Digital Encoder Kit, HDMI/Composite/Component Input, ATSC/J.83B QAM/DVB-T/ISDB-Tb output, CC, EAS, Default LATIN AMERICA: ISDB-T