Sherwood V-903 Definition Of Terms, DVD Video, Mpeg, Folder MP3/JPEG disc, File MP3/JPEG disc

V-903V(G) 2006.4.20 05:58 PM 페이지 39

Definition Of Terms

DVD Video

This refers to a high-density optical disc on which high- quality pictures and sound have been recorded by means of digital signals. Incorporating a new video compression technology (MPEG-2) and high-density recording technology. DVD Video enables esthetically pleasing full-motion video to be recorded over long periods of time (for instance, a whole movie can be recorded).

DVD Video has a structure consisting of two 0.6 mm thin discs which are adhered to each other. Since the thinner the disc, the higher the density at which the information can be recorded, a DVD Video has a greater capacity than a single

1.2mm thick disc. Since the two thin discs are adhered to each other, there is the potential to achieve double-sided play sometime in the future for even longer duration play.

MPEG

MPEG stands for Moving Picture Expert Group. It is regarded as an international standard for compressing and restoring digital video and audio signal. "MPEG" standards include MPEG-1, MPEG-2 and MPEG-4. Video CD and MP3 are based on MPEG-1, while DVD Video is based on MPEG-2.

Folder (MP3/JPEG disc)

Folder is the largest unit of the contents recorded on MP3 discs.

File (MP3/JPEG disc)

Each material (song/picture) is recorded on a file.

Files may be grouped into a folder by artist, album, category, etc.

•DVD Video structure

•CD structure

•MP3/JPEG disc structure

On an MP3/JPEG disc, a folder can be a member of another folder, creating hierarchical folder layers. If you are familiar with a personal computer, you may easily understand the hierarchical file/folder construction.

ENGLISH

MP3

MP3 is an audio data reduction format, which stands for MPEG-1 Audio Layer 3. Using MP3, you can achieve a data reduction of about 1:10.

•MPEG Layer-3 audio coding technology licensed from Fraunhofer IIS and Thomson.

JPEG (Joint Photographic Experts Group)

JPEG is a papular file format for still image compression and storage.

There are three sub-types of the JPEG format as follows.

•baseline JPEG: used for digital cameras, the web, etc.

•progressive JPEG: used for the web.

•lossless JPEG: an old type, rarely used now.

Title, Title number (DVD Video)

The title is the largest unit of the video/audio recording in DVD Videos. Usually, the title corresponds to a movie of video software or an album (or a piece) of music software. Title numbers are sequential numbers assigned to titles.

Chapter, Chapter number (DVD Video)

Chapters are divisions, which are smaller than the titles, of the contents recorded on DVD Videos. Every title is composed of more than one chapter. Chapter numbers are the sequential numbers assigned to the chapters in a DVD Video.

Track number (CD)

Track numbers are used to designate the various sections of a disc.

Aspect ratio (DVD Video)

The aspect ratio is the ratio between the vertical and horizontal size of the picture displayed on a TV screen. The aspect ratio of normal TV screen is 4:3 while that of the wide- screen TV and HDTV screen is 16:9.

Subtitle (DVD Video)

Some DVD Videos contain the recording of more than one subtitle languages. With these discs, this unit can select one of the subtitle languages as desired during playback.

Angle (DVD Video)

Some DVD Videos contains scenes which have shot simultaneously from multiple camera angles. With these discs, the same scene can be viewed from each of these different angles.

Interlaced scan

In the conventional video system, a picture is shown on the screen 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.

39