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File format features
MP4 video CDs
An MP4 video is an encoder/decoder, based on the MPEG-4 com-
pression system, which is used to decrypt and display compressed
video data.
This enables the DVD player to play back videos compressed in the
DivX
©
format. This results in playback quality with fewer artefacts
and higher compression.
MP4 video files have the suffix .AVI. MP4 video data is packed
into the AVI file along with audio data which is compressed as
MP3 data, this means:
MP4 video and MP3 audio form the AVI file.
MP3 CDs
MP3 stands for MPEG-1 Audio Layer 3 and comes from the
Motion Picture Expert Group (MPEG) standard, which was
developed for compressing film data.
The MP3 format enables audio files to be saved on a computer
with a sound quality similar to that of a CD. This only requires about
10% of the original data quantity. The standard encoding bit rate
for MP3 files is 128 kbps. Generally, the higher the bit rate of an
MP3 file, the better the sound quality.
Most MP3 files on the Internet are encoded at 128 or 160 kbps.
160 kbps is considered CD quality.
MP3 files can be downloaded from the Internet and then burned
onto a CD-ROM. Your DVD player can read the ID3 tag from the
file header, which contains information on the song and the artist,
and displays this in the info menu/status display.
MP3 CDs contain sound recordings. They can be played in the
normal manner on an audio system. The digital signals transmitted
during MP3 playback are PCM encoded, regardless of the audio
output setting. The signals are output with the same data rate as
the music source (possibilities are: 32 kbps – 320 kbps, ideal:
128 kbps).
MP3 files can be organised into folders and subfolders similar to
files on a computer.
PLAYING AUDIO/VIDEO FILES
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