Dictionary of TV words

Dolby Digital, DTS 5.1 / 7.1 surround sound meaning below

All TV spec words starting with the letter 'D' explained

Deep Color

Deep color is a term used to describe colors with 10 bits or more of color information and produce a billion or more shades of colors.


Deinterlacing converts interlaced video into progressive video. It is therefore the process of converting signals that are transmitted as half frame pictures into full frame pictures.

Digital Audio

Digital audio records and plays back sound using digital signals. The most important aspect of Digital Audio is that there is no loss of quality while recording and playing back Digital Audio. Dolby Digital and DTS are two competing digital audio compression technologies for 5.1 and 7.1 surround sound. To the question as to what is the difference between Dolby Digital and DTS the answer is simply they both do somewhat the same thing, great sounding surround sound. To the question of is DTS better than Dolby Digital or the other way round, it all depends on personal choice. Most cannot make out any difference betwee Dolby Digital and DTS.

Digital audio Cables

To get the maximum benefit of digital quality audio proper cables must be used. Two Connections are widely used for connecting Digital Audio are the Optical Audio Cable called TOSLINK (short for 'Toshiba Link') and the Coaxial Audio Cable which have 75 ohm normal TV Cable and an RCA connector at the ends. These cables are used to connect DVD players, CD playes, STB, etc. to Amplifiers or to the TV direct to play multichannel surround sound like Dolby Digital and DTS. HDMI connections also support Digital Audio and newer TVs have a feature called 'Audio Return Channel that sends back the Audio signal for Amplifiers to amplify and play Surround Sound.

Direct View TV

Direct View Television is any type of television from which we see the pictures directly on its screen. CRT Tube, LCD, LED, Plasma TVs are all Direct View Televisions. A projection TV is not a direct view TV since the picture is first formed on a small screen and then projected on to the bigger screen.

DLNA TV meaning

DLNA, is the abreviation for 'Digital Living Network Alliance' - an alliance of about 200 companies, including the big players like Panasonic, Samsung, Sony, Cisco, Denon, Yamaha and Microsoft. The aim of the alliance is to make all of their products compatible and able to connect to each other across your home network in order to have wireless DLNA connectivity throughout the house. With wireless DLNA connection DLNA compatible devices are connected wirelessly throughout the house.

DLP full form

The full form of DLP is 'Digital Light Processing', a projection technology developed by Texas Instruments using Digital Micromirror Device (DMD) microchip. The DMD chip consists of many tiny swiveling mirrors which reflect the image on to the screen. There are two types of DLP projectors, single-chip models and 3 chip models. In a single chip DLP projector, a high speed spinning wheel is used to make the required primary colors Red, Green and Blue to be reflected off the DMD. The spinning wheel colors cause an effect known as the 'Rainbow effect' on a small percentage of viewers. The 3 DMD chip projectors do not suffer from this effect and are used by most modern cinema theaters to project movies on their large screens.

Dolby Atmos meaning

Dolby Atmos is a new type of 3D surround sound system, which adds speakers overhead in addition to the normal front, center, side and back speakers. The overhead speakers add a third dimension to the surround sound to give true 3D surround sound.

Dolby Atmos 7.1.4 Surround Sound

With the new Dolby Atmos home sound systems sound comes from the top of your head as well and this gives stunning sound to scenes like in a thunder storm, where you can feel the deafening sound of thunder overhead from the top speakers, and the natural sound of rain falling on the ground around you coming from the front, side and rear speakers.

Now it is now possible to enjoy the fantastic ATMOS 3D surround sound at home with new Dolby Atmos surround sound systems from famous Audio companies like Denon, Marantz, Onkyo, Pioneer and Yamaha. These Companies are introducing many new Dolby Atmos Audio Receivers either stand alone Dolby Atmos Receivers or as Dolby Atmos Home Theatre in a Box (HTIB) complete with receiver and all the required speakers.

This is the link to website to see Dolby Amos Home Theater Systems on offer

Dolby Digital

Dolby Digital is an audio compression technology developed by Dolby Laboratories. Till 1994 it used to be known as Dolby Stereo. Dolby Digital normally gives 5.1-channel surround sound. To quote from the Dolby site "Dolby® Digital is an industry-standard surround sound audio codec designed to deliver 5.1 channels of audio to many popular forms of entertainment including DVDs; Blu-ray Discs; cable, broadcast, and satellite TV programming; PCs; and even video games. An advanced encoding/decoding technology, Dolby Digital reproduces multichannel audio to deliver a cinematic audio experience."

Down-Conversion (DDC)

When the resolution of an incomming signal to a TV is more than the native resolution of the TV, then the TV has built in processors to Down-Convert the higher resolution picture to its native resolution. An example of downconversion will be an HDTV signal of 1920X1080i being down-converted to an HD ready TV of 1280x720p.

DTS full form

the full form of DTS is 'Digital Theater Systems'. DTS is a 5.1 and 7.1 multichannel audio surround sound technology developed by DTS (Digital Theater Systems) Inc.

DTV stands for

DTV stands for Digital Television. Most countries have stopped TV signal transmission in analogue format and are adopting DTV. The USA Government site says this about DTV "Digital Television (DTV) is an advanced broadcasting technology that has transformed your television viewing experience. DTV has enabled broadcasters to offer television with better picture and sound quality. It also offers multiple programming choices, called multicasting, and interactive capabilities. The switch from analog to digital broadcast television is referred to as the Digital TV (DTV) Transition. In 1996, the U.S. Congress authorized the distribution of an additional broadcast channel to each broadcast TV station so that they could start a digital broadcast channel while simultaneously continuing their analog broadcast channel. Later, Congress set June 12, 2009 as the deadline for full power television stations to stop broadcasting analog signals. Since June 13, 2009, all full-power U.S. television stations have broadcast over-the-air signals in digital only."

DVB stands for what

DVB stands for 'Digital Video Broadcasting' and S2 means 'Satellite - Second Generation'. DVB-S2 is a digital television broadcast standard and is an enhancement of the original DVB-S system. DVB-S2 enables broadcasters to provide interactive services like Internet access. DVB-S2 is much better than the original DVB-S and allows Satellite DTH (direct-to-Home) providers to increase bitrate using the same satellite transponder bandwidth. The improvement is said to be over +30% of the first generation DVB-S. If the benefits of improved compression using the latest MPEG-4 are added to the DBV-S2, then DTH providers can transmit HDTV and 3D TV using the same bandwidth as the old DTH providers were using to transmit 4:3 ordinary SDTV (standard definition TV). The old DTH providers use first generation DVB-S and the old MPEG-2 compression system.
Some of the DTH (direct-to-home) broadcasters using DVB-S2 in the English speaking world are:

  • Airtel Digital TV in India
  • Videocon D2H in India
  • Sky+ HD and Freesat in the UK and Ireland
  • Saorsat in Ireland
  • Dish Network in the U.S.
  • Bell TV in Canada
  • Cignal Digital TV in Philippines
  • TopTV in South Africa

DVI (Digital Visual Interface)

DVI is a video interface standard to transfer video signals from a source device like a Personal Computer to a display device like an LCD monitor. The modern digital video equipments and TVs have now standardized on the HDMI connection and DVI connections are now fitted only on computers. Adapters are available to convert DVI to HDMI and thus pictures from a PC or laptop can be played on a TV. Audio connection will be required separatly to play audio on the TV.

Dynamic backlighting: What Dynamic backlighting means

To improve the Contrast Ratio, LCD and LED TVs, the backlight of the TV is dynamically adjusted to match the brightness or darkness of the picture playing on the LCD or LED TV.

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