JVC UX-J99DVD Glossary, English, Aspect ratio, Component video signal, Composite video signal

English

Glossary

Aspect ratio

The ratio of horizontal and vertical sizes of a displayed image. The horizontal vs. vertical ratio of conventional TVs is 4:3 and that of wide-screen TVs is 16:9.

Component video signal

A video signal system where elements necessary for reproducing image signal comprised of the three primary colors of light are transmitted via separate signal lines. Types of signal, such as R/G/ B, Y/PB/PR, etc., are available.

Composite video signal

A video signal comprised of three kinds of signals combined: an image signal made up of luminance and chrominance signals using the frequency multiplication technique, burst signal providing the basis for color reproduction, and synchronization signal.

Dolby Digital

This is a digital audio compression technology that was developed by Dolby Laboratories. Dolby Digital encoding method (so-called discrete 5.1 channel digital audio format) records and compresses the left front channel, right front channel, center channel, left rear channel, right rear channel, and LFE channel (total 6 channels, but LFE channel is counted as 0.1 channel, therefore called 5.1 channels) signals digitally. Each channel is completely independent from other channel signals to avoid interference, therefore, you can obtain much better sound quality with stereo and surround effects.

Dolby Pro Logic

Dolby Surround encoding format records the left front channel, right front channel, center channel, and surround channel (monaural) signals into 2 channels.

DTS Digital Surround

Another discrete 5.1 channel digital audio format, available on CD, LD, and DVD software, developed by Digital Theater Systems, Inc.

Compared to Dolby Digital, audio compression rate is relatively low. This fact allows DTS Digital Surround format to add breadth and depth to the reproduced sounds. As a result, DTS Digital Surround features natural, solid and clear sound.

Interlaced scanning

Multi-angle

By recording multiple scenes progressing at the same time in a single title, the user can select view angles. This feature is called the multi-angle function.

Multi-channel

DVD VIDEO has been designed to have each soundtrack constitute one sound field. Multi-channel refers to a structure of sound tracks having three or more channels.

Multi-language

When a title is created to cope with multiple languages, it is generally called a multilanguage title.

Playback control (PBC)

Refers to the signal recorded on SVCD/VCD for controlling reproduction. By using menu screens recorded on SVCD/VCD that supports PBC, you can enjoy interactive-type software as well as software having a search function.

Progressive scanning

By progressive scanning, all the horizontal lines of a picture are displayed at one time as a single frame on a TV compatible with NTSC color system. This system can convert the interlaced video from DVD VIDEO into progressive format for a progressive TV. It dramatically increases the vertical resolution.

Region code

A system for allowing discs to be played only in the regions designated beforehand. All the countries in the world are divided into six regions and each region is identified by a specified region code (or region number). If the region code of a disc matches to that of a player, the player can play back the disc.

Sampling frequency

Frequency of sampling data when analog data is converted to digital data. Sampling frequency numerically represents how many times the original analog signal is sampled per second.

Transfer rate

The rate of transferring digital data. Usually the measure is in bit per second (bps). The DVD system applies a variable transfer rate system for high efficiency.

In the conventional video system, a picture is shown on the display monitor in two halves. The Interlaced scanning system places lines of the second half of the picture in-between lines of the first half of the picture.

JPEG

A still-picture data compression system proposed by the Joint Photographic Expert Group, which features little distortion in image quality in spite of its high compression ratio.

Letter box

A method of displaying wide images like movies in on a 4:3 TV screen with no part of the image deleted by placing black bands on the top and bottom of the screen. This name has derived from the screen form looking literally like a letter box.

MP3

A file format with a sound data compression system. “MP3” is the abbreviation of Motion Picture Experts Group 1 (or MPEG-1) Audio Layer 3. By using MP3 format, one CD-R or CD-RW can contain about 10 times as much data volume as a regular CD can.

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