Two types of HD broadcast.
There are two principal types of HD broadcast: 720p and 1080i. 720p broadcasts transmit a 1280 x 720 pixel frame 60 times per second. 1080i broadcasts transmit a larger 1920 x 1080 frame at up to 30 times per second. Fortunately, all HD televisions can receive and display both types of HD broadcasts as well as Standard Definition.
HD projection TV.
Until recently, many projection TVs used three cathode-ray tubes (CRTs). Today’s models achieve higher performance and longer life by filtering white light using ultra-small microdisplay panels. These include Sony’s SXRD and 3LCD Grand WEGA systems, plus competing LCoS and DLP systems. Microdisplay televisions tend to be far lighter and sleeker than CRT-based projection TV.
HD flat panel TV.
While conventional CRT televisions are boxy and heavy, today’s flat panel LCD TVs can literally hang on a wall. And Sony’s BRAVIA LCD TVs are masterpieces of technology that look really good on a wall.
HDMI and DVI.
DVI, the Digital Visual Interface carries pristine component digital video. HDMI goes one better by adding multi-channel digital audio. Simple adapters convert DVI to HDMI. But you’ll still need separate cables for audio.
Viewing distances are not the same for high definition and standard definition. In the store, try to compare sets at the distance you will view from at home to find the right screen size for you. Ideally, the center of your TV screen should be at eye level. For the typical person in a typical couch, this is about 45 inches (114 cm) off the floor. That’s why it’s smart to buy the TV manufacturer’s stand, which usually positions the screen center at about this height.
Progressive, interlaced and scaling.
Progressive scanning (720p and 1080p) transmits all the horizontal scanning lines at the same time. Interlace scanning (1080i) transmits each picture as two fields, each of which includes alternating horizontal scanning lines. 1080p is considered the “holy grail” of HD. To accommodate 1080, 720 and 480-line sources, modern televisions routinely use “scalers.” These circuits convert all inputs to progressive at the screen’s native pixel count.
Featured in Sony Grand WEGA™ 3LCD television, Sony’s 3LCD chips deliver extremely accurate color reproduction, gorgeous gradation of deep blacks, and high resolution at surprisingly affordable prices. Some DLP viewers may notice color break up and not see color all the time. 3LCD delivers color to the screen at the same time without artifacts for natural color realism. The result is a bright, detailed and vivid picture.
Sony’s unique SXRD panel uses a liquid crystal layer backed by a reflective aluminum substrate. Benefits include Full HD 1080 at reasonable cost, high contrast, fast response and an extremely smooth, film-like picture. Unlike most DLP televisions, SXRD sets incorporate separate panels for Red, Green and Blue. So color is rendered right down to the individual pixel and you’ll never experience color breakup.
BRAVIA LCD technology.
There are many LCD televisions out there. But few with 7th-generation manufacturing. Few with an exceptional 178° viewing angle. And few with a Wide Color Gamut backlight, specially formulated color filters and color processors, forming Sony’s Live Color Creation. These innovations set BRAVIA LCD televisions apart from the crowd, making BRAVIA the choice for outstanding picture performance.
Most DLP televisions use a single display chip and a rotating color wheel to flash individual colors up on the screen, one at a time! This flashing may be noticeable to some viewers as something called “rainbow effect” or color breakup. Sony projection televisions use three individual LCD chips to produce images, so there are no problems with color breakup.
Freedom from Glare.
While plasma televisions offer some advantages, they’re particularly sensitive to room light. Compared to BRAVIA LCD televisions, plasma TVs are more likely to exhibit glare, where ambient light tends to wash out the TV picture. Compared to plasma screens, BRAVIA television also offers superior gradation and reduced double-images due to internal reflection.