Apex Digital LAD-703 owner manual What is MP3 and VCD?, What is MP3?, What is VCD?

What is MP3 and VCD?

WHAT IS MP3?

MP3 is a compression form (like zip). The name MP3 stand for Mpeg1 Audio layer 3 and its compression algorithm is based on a complicated psycho-acoustic model. This model is based on the fact that the human ear can not hear all the audio frequencies. The human hearing range is between 20Hz to 20khz and it is most sensitive between 2 to 4 kHz. As a result the MP3 compression form is destructive, that means the compression algorithm causes the file to lose some information so that it can not be restored to its original content.

When compressing an audio file (encoding) using the MP3 algorithm you can set the desired encoding level and have any compression level you want. The larger the compressed file the better the audio quality of the result. The majority of the files available on the internet are encoded in 128 kbits stereo 44kHz which results in a high quality file that is 12 times smaller than the original! This, of course, has many interesting consequences.

WHAT IS VCD?

Size and shape of any regular music CD with the same digital audio, plus good video capability. It is a new video format that offers exceptional high-end digital picture quality and smoothness, over an hour of playing time, full CD-quality, stereo sound, and more. Using MPEG (Motion Picture Expert Group) compression (1:30), VCD’s offer picture quality that is far superior to the Quicktime movies you see on standard VHS tape.

This product incorporates copyright protection technology that is protected by method claims of certain U.S. patents and other intellectual property rights owned by Macrovision Corporation and other rights owners. Use of this copyright protection technology must be authorized by Macrovision Corporation, and is intended for home and other limited viewing uses only unless otherwise authorized by Macrovision Corporation. Reverse engineering or disassembly is prohibited.

It is forbidden by law to copy, broadcast, show, broadcast on cable, play in public, and rent copyrighted material without permission.

DVD video discs are copy protected, and any recordings made from these discs will be distorted.

Manufactured under license from Dolby Digital Laboratories. "Dolby " and the Double-D symbol are trademarks of Dolby Laboratories. Confidential unpublished works. c 1992-1997 Dolby Laboratories, Inc. All rights reserved.

"DTS"and "DTS Digital Out" are trademarks of Digital Theater System, Inc.

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