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quality at extremely low bitrates. It is used for DVD videos and Super Video
CDs (SVCDs).
The DVD plugin enables you to generate SVCD-compatible MPEG-2 files and
burn a Super Video CD, which can contain around 40 minutes of film material.
Average bitrate for an SVCD is around 2.3 Mbits per second.
With the MPEG-2/DVD plugin, you can create both DVD-compatible MPEG-2
files and SVCD-compatible MPEG-2 files. This means you can fit about two
hours of film material on a DVD. The average bitrate for a DVD video is around
4.8 Mbits per second. Please note that you need NeroVision Express and
Nero (5.5.8.1 or higher) to encode video files with the MPEG-2/DVD plugin and
burn the DVD.
MP3 / mp3PRO
MP3 is an acronym (or file extension) for "MPEG Audio Layer 3". These are
compressed audio files which can be played on a computer using an MP3
player. (MPEG stands for Motion Pictures Expert Group, which is a US
standards organization responsible for full motion video standards.) MP3 was
developed by the Fraunhofer Institute IIS and is restricted to audio data, in the
same way as mp3PRO, which was developed by Coding Technologies.
Nero can compress both MP3 and mp3PRO files, both of which have the file
extension MP3. MP3. The quality of the signal depends on the compression
rate. The standard rates are 64 kbps at 44100 Hz stereo for mp3PRO and 128
kbps at 44100 Hz stereo for MP3. During the encoding process the original
WAV file is generally reduced to about 5 percent of its original size in mp3PRO
format and to about 10 percent in MP3 format. The encoding process is lossy,
but the psychoacoustic models remove only those parts of the audio file which
are considered to be inaudible. Audible parts of an audio file can only be lost at
a high compression rate.
Nero allows you to convert 30 files into MP3 or mp3PRO format. For licensing
reasons, it is not possible to convert more files. You can find both the plugins
which allow unlimited encoding on Ahead Software AG's website: Ahead
Webshop.
MP4-AAC
MP4 is an acronym (or file extension) for "MPEG Audio Layer 4". These are
compressed audio files which can be played on a computer using an MP4
player.
AAC is part of the MPEG-4 standard has so far been used mainly for
commercial purposes. The MPEG-4/AAC encoder works about 30% more
efficiently than MP3 and has fewer problems with critical samples. This gives
better quality for the same file size. Multichannel sound is also possible.
The quality of the signal depends on the compression rate. The norm with MP4
is 128 kbps at 44100 Hz, stereo. Encoding reduces the original WAV file to
around 10% of its original size. The encoding process is lossy, but the
psychoacoustic models remove only those parts of the audio file which are
considered to be inaudible. Audible parts of an audio file can only be lost at a
high compression rate.
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