TVBasics.com
Dictionary of TV words

On this page we have all TV specification words starting with the letter 'B'

Backlight Scanning vs Refresh Rate

LCD or LED TVs require a backlight to illuminate and project the picture formed on the LCD screen to be seen on the TV. The problem if the backlight is on all the time, is that there is a bright light behind the LCD screen even when the screen has no picture or when the screen is showing a dark scene, and this reduces the contrast ratio of the TV. Also with a constantly lit back light, there is motion blur in fast moving scenes.

To avoid these problems, TV makers have synchronized backlights to on off in unison with the picture on the screen. Also the scanning backlight is able to adjust the backlight to on in behind bright areas of the picture on the screen and to stay off behind dark areas of the TV picture. This way the contrast ratio of the TV is increased dramatically to give very good picture. The scanning backlight also ons and offs hundreds of times per second in fast moving scenes to reduce motion blur.

The other method used by TV manufacturers to reduce motion blur is to have more frames on the screen per second, the so called refresh rate or Hz. So you have TVs with 120Hz, 240Hz, etc. which are the refresh rate of a TV. Both Refresh Rate of a TV and backlight scanning try to reduce the motion blur in fast moving TV pictures.

Bandwidth: What is the Bandwidth of TV signal

Bandwidth of TV signal is the maximum amount of data which can be transferred in a unit of time, usually a second. Bandwidth can thought of as the diameter of a pipe. A larger diameter pipe can transfer much more water than a smaller diameter pipe. Bandwidth is similar to the diameter of the pipe, a larger bandwidth means more data can be transferred. HDTV transmission requires more bandwidth than normal TV, to transmit a picture.

Bitrate: What is bitrate in video streaming

Means 'Bits per second' a measure of the speed of data transfer. HDTV video streaming requires a higher bitrate, because more data has to be transferred per second in HDTV than in a Standard TV picture. Bitrates are normally expressed in Megabits-per-second (Mbps - One Megabit is one million bits.) For standard DVD the bitrate is 11Mbpsand for Blu-ray the bitrate is 54Mbps. The higher bitrate means more number of picture frames per second are shown on the TV and thus you get much more detailed and clear picture.

Blooming TV effect

Blooming LED TV effect is a phenomenon that occurs in LED TVs with local dimming function. You will notice a sort of halo around white parts of the image on a dark background. This leakage of light into the dark areas from white areas is called the blooming effect of TVs

Blu-Ray

Blu-ray Disc (BD) is the new format recordings for video which replaces the DVD. The BD discs are the same size as DVDs and CDs but Blu-ray Discs can hold 25 GB per layer (dual layer discs 50 GB) compared with 4.7 GB per layer of the DVD. Blu-Ray HD 1080p or Blue Ray in true High Definition 1080p is available now. Blu Ray on 1080i tv and Bluray on 720p tv were available earlier.

BRAVIA Engine from Sony

BRAVIA Engine from Sony is a high definition video processor which reproduces pictures with higher contrast, superior colours, and clarity. These high quality images are obtained regardless of whether the source is in SD (Standard Definition) or HD (High Definition) TV.

BRAVIA Internet Video of Sony

With BRAVIA Internet Video, the Sony Smart Television becomes a true all-in-one entertainment centre that allows access to favorite video websites, like Youtube, straight on your TV from a WiFi connection. Access to Skype, Twitter, Facebook, Youtube and many more sites that directly on the TV is the most convenient feature of Sony Smart TVs.

Burn-in problem Plasma TV

Plasma TV screen burn-in occurs when there is one constant picture on the TV screen all the time, like the logo of the channel you tend to watch most. This logo sort of gets imprinted on the screen permanently and this is called Plasma TV screen burn-in. When you change to watch another channel, the logo of the TV station you always watch appears as a ghost image on all channels. Plasma TV screen burn-in used to be a major problem, but now Plasma TV manufacturers have overcome this problem by the process called 'pixel-shifting' under different trade names like 'pixel wobbling', 'pixel orbiting', etc.

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