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No, but the answer can be complicated.
The LCD panel which is the main display component inside a LCD TV can be made in many different sizes -total overall size-, shapes -differences of length and height ie square or rectangle- as well as resolutions -the amount of detail the panel can display, typically called pixel resolution-. The term "HDTV" has no legal or official definition, but a few common standards are agreed upon as set by manufacturers, advertisers, broadcast standards and the public, although there can be disputes about the specifics.

Generally a display is not considered an HDTV unless it has a resolution of at least 1280 length pixels by 720 height pixels, a standard referred to as 720p. There is also another common HDTV resolution known as 1080i or 1080p which has a larger pixel area of 1920 length by 1080 height pixels. Some argue a TV can not be called a HDTV unless it can display both native, however most manufacturers will label a LCD that can only display 720p as a HDTV, and often include circuitry inside the TV to convert or squish the image down to fit.

Also a display needs to be able to display a image shape that is 16 units wide by 9 units tall, or a 16:9 aspect ratio. The LCD panel can be of many different shapes, but it must be able to display a picture of that ratio. In some cases the LCD panel has an aspect ratio that is larger than 16:9, like 20:10, or smaller than 16:9, like 4:3. In this instances the TV needs circuitry inside that will either turn off the extra area, or expand or reshape the image to fit the 16:9 area of a HDTV picture. Some will argue that a TV is not a true HDTV unless it can display the picture without alteration. Many HDTV have special modes so they can display old SDTV (standard definition) signals using the same conversion circuitry.

Finally, many groups argue a LCD TV can not be marketed as a HDTV unless it has a DTV capable tuner inside of it. Since the invention of the television, the set has always included a tuner inside, often called the channel changer, that can receive the TV signal and allow you to adjust the channel or frequency you receive and display on the screen. When the initial digital based televisions or DTV capable display were first introduced, a digital tuner was not yet standardized so they either contained an old analog tuner or no tuner at all. Without a tuner, the display needs an outside means of receiving signals, say for example a cable box, or satellite box, or a DTV STB which stands for a digital set top box that can receive the new DTV signals which carry HDTV programs.

To summarize, a LCD screen can be made to display images below the HDTV standard, and it may not include a digital tuner that can receive digital television without an additional set top box. Most will argue that a LCD TV must be able to do both to be labeled a HDTV LCD. A specific LCD TV should define its pixel resolution and whether it contains a digital tuner which will determine its accurate definition.

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Q: Some tv descriptions say LCD HDTV and some just say LCD are all LCD TVs HDTV?
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