Saturday, February 14, 2009

Portable DVD Player Glossary (2)

HDTV

Is High Definition Television, which is a subset of the new ATSC Digital Television (or Digital TV) specification. HDTV commonly refers to either 1080i or 720p formats. The 1080i format consists of 1080 lines of resolution in interlace scanning (the "i" is for short for interlaced scanning), whereas the 720p format is comprised of 720 lines of resolution in progressive scanning (the "p" stands for progressive scanning). The complete Digital TV standard consists of no less than 18 different picture formats.

HD DVD
Is the next-generation optical disc format for the recording and playback of high-definition content. The disc adopts the same structure as current DVD with two 0.6 millimeter thick discs bonded back to back to assure the high-yield, cost-effective production of high capacity dual-layer discs - an advanced version of the discs that have proved their versatility and popularity in current DVD. The HD DVD format is supported by cutting-edge blue-laser technology, new high level data-processing techniques and highly-efficient video-compression technologies.

HT
It refers to a system of audio and video components working together to re-create the theatrical movie experience in the comfort and privacy of the home. A typical DVD-based home theater system consists of: (1) DVD player, (2) television, (3) A/V receiver, (4) five speakers (center speaker, left speaker, right speaker, and a pair of surround speakers), and optionally (5) subwoofer. Today's state-of-the-art home theaters feature a DVD player, since DVDs offer superior video and unsurpassed surround sound.

Minijack
Standard 1/8" jack/plug connector that is commonly used for connecting and transmitting signal to headphones or other audio components.

MP3
Is an audio compression algorithm capable of greatly reducing the amount of data required to reproduce audio, while sounding like a faithful reproduction of the original uncompressed audio to the listener.

MPEG-1
Is video compression algorithm that is part of the Video CD standard. The algorithm is developed by the Motion Pictures Experts Group (MPEG). MPEG-1 effectively compresses the video picture to about 1/140 of its original size.

MPEG-2
Is a video compression algorithm that is part of the DVD-Video, Digital Broadcast Satellite, and Digital TV (including HDTV) standard. The algorithm is developed by the Motion Pictures Experts Group (MPEG). MPEG-2 effectively compresses the video picture to about 1/40 of its original size. The picture quality from a MPEG-2 encoded source is superior to that of MPEG-1.

Multi-channel
Usually refers to the use of more than two channels, for either movie surround sound (5-channel or 6-channel) or music surround sound (5-channel or 6-channel DVD-Audio and Super Audio CD). Stereo is equivalent to two-channel. Mono is one-channel.

Multi-system
They are compatible with any VCR, code-free DVD and TV, PAL/SECAM/NTSC, 110/220 V, anywhere in the world.

Optical digital audio output
Is a fiber optic digital audio connection used to connect a digital source component (e.g., DVD player, CD player, etc.) to a receiver or pre-amplifier. The data passed is the "raw" digital audio signal using laser (light) pulses. This means of interconnection minimizes the interference and degradation. Also called "Toslink".

PAL
Refers to a video standard that is used in most European countries and elsewhere in the world. This is different from the NTSC system that is used in the U.S. and Canada.

4:3 (Pan & Scan)
Is the ratio of the width to height of standard television screens and some other displays. When viewing DVD titles meant for wide screen (16:9) playback the sides of the image may be chopped off (Pan & Scan). However this can be avoided using a Letterbox playback mode.

PBC
Is a method of controlling disc play is included on version 2.0 Video CDs (VCD). You are able to interact with the disc through menus. Using these menus to play Video CDs is called "menu play" in these operating instructions.

QSurround
This system decodes and virtualize multi-speaker surround sound from various matrix surround encoded sources: Dolby Surround, stereo down mixed AC-3, stereo down mixed DTS. Produces normal and wide 3D sound expansion from any stereo input signal.

RCA (cable/connector)
Is a common, standard connection method used to transmit analog audio and video signals between devices. Commonly used on most receivers, televisions, satellite receivers, VCR's, game console systems and speakers.

Receiver
Is a single unit box that performs the functions of a tuner, pre-amplifier (performs input and output switching, performs tuner functions, decodes multi-channel sound), and power amplifier (amplifying the audio signal to drive loudspeakers). Use of a receiver is the more common and cheaper alternative to separates (use of pre-amplifier and power amplifier as separate components).

Region code
DVD software is distributed with a region encoding. To play back a DVD title with a specific region code, you will need a DVD player with the same region code. For example, a DVD encoded with "region 1" (United States and Canada) can only be played back on a DVD player with "region 1" capability. The movie studios and software distributors have imposed the region encoding feature to control distribution of DVD software only to those regions where they are ready to distribute.

SDTV
Is part of the ATSC's digital television standard. Together with High Definition Television (HDTV), Enhanced Definition Television (EDTV), SDTV make up the U.S. digital television standard. SDTV is essentially 480 lines of resolution in interlaced scan, or 480i (the "i" stands for interlace scanning). SDTV used to mean either 480i or 480p (480 lines of resolution in progressive scanning, the "p" stands to progressive scanning), but now SDTV only stands for 480i. The 480p format is now designated as Enhanced Definition Television. 480p is the video format output by progressive scan DVD players.

Single-layered
Refers to a DVD disc that has one layer of information per side. A single-layered DVD may still have one side (single-sided) or two sides (double-sided) of information, holding two hours and four hours of video information, respectively. The double-sided, single-layered disc requires manual "flipping" of sides.

SVCD
Is a format used for storing video on standard compact discs or CD-Rs. Picture and audio quality are less than those of the DVD format, but higher than in its predecessor Video CD (VCD). SVCDs store digital video in MPEG-2 format at a resolution of 480x480 pixels (for NTSC) or 480x576 pixels (for PAL). Video may be encoded at a variable bit rate between 1.5 and 2.6 megabits per second. Audio is stored in MPEG-2 Layer 2 format, with a bit rate varying from 128 to 384 kilobits per second.

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