Digital TV Standard

As is known, Digital TV Standardmeans the way in which your television receives and displays signals. Below will show the details:

Analog
 Analog is not a digital format. It is the traditional display type that uses the NTSC system and is what we have been watching for years. Analog televisions have an almost square screen (4:3 aspect ratio) and are unable to display HDTV signals. Because the federal government has mandated that broadcasters begin switching from analog to digital television signals, manufacturers have begun producing televisions that are capable of displaying the new digital format. In the future, analog TVs will only be able to receive digital signals with the addition of a receiver that will decode digital signals.

HDTV Monitor
HDTV refers to "High Definition Television," which is the highest quality of digital television available. HDTV Monitors are also known as "HDTV-Ready" or "HDTV-Capable" TVs. With the addition of a separate receiver, these televisions can display high definition signals (1080i, 720p, etc.) that result in images that are many times clearer and more detailed than those from analog televisions, as well Dolby Digital Sound. HDTV is displayed using an aspect ratio of 16:9, or "widescreen." The separate receivers may also be referred to as set-top boxes, digital decoders or digital tuners. These sets are usually less expensive than sets that have the receiver integrated with the television.

EDTV Monitors
EDTV refers to Enhanced Definition Television, which provides lower image quality than HDTV, but still higher quality than a standard digital (SDTV) signal. EDTV Monitors are also known as EDTV-Ready" or "EDTV-Capable" TVs. With the addition of a separate receiver, these televisions can display enhanced definition signals (at least 480p) that result in images that are clearer and more detailed than those from analog televisions, as well as Dolby Digital Sound. EDTV may use an aspect ratio of either 16:9 (widescreen) or 4:3 (square-shaped; same shape as analog television). The separate receivers may also be referred to as set-top boxes, digital decoders or digital tuners. These sets are usually less expensive than sets that have the receiver integrated with the television.

HDTV
HDTVs have built-in digital receivers/decoders and do not require the purchase of any separate components in order to display digital signals. They may also be referred to as an "integrated set" or "HDTV built-in." These televisions can display high definition signals (1080i, 720p, etc.) that result in images that are many times clearer and more detailed than those from analog televisions, as well Dolby Digital Sound. HDTV is displayed using an aspect ratio of 16:9, or "widescreen."

EDTV  
EDTV refers to Enhanced Definition Television, which provides lower image quality than HDTV, but still higher quality than a standard digital (SDTV) signal. EDTVs have built-in digital receivers/decoders and do not require the purchase of any separate components in order to display digital signals. They may also be referred to as an "integrated set" or "EDTV built-in." These televisions can display enhanced definition signals (at least 480p) that result in images that are clearer and more detailed than those from analog televisions, as well as Dolby Digital Sound. EDTV may use an aspect ratio of either 16:9 (widescreen) or 4:3 (square-shaped; same shape as analog television).

SDTV

SDTVs have built-in digital receivers/decoders and do not require the purchase of any separate components in order to display digital signals. SDTV refers to "Standard Definition Television," which provides lower image quality than EDTV or HDTV, but higher image quality than analog TV. SDTV is displayed using an aspect ratio of 4:3, the same square shape as analog television.