Saturday, September 09, 2006

MP3 and MP4 Players

Flash MP3
players have revolutionized the way we listen to music.

blog post is all about mp3 and mp4 players which are gaining popularity everyday
among every aged man. Be a music aficionado or an impulsive data carrier or web
from portables, what all you need is a MP3 or MP4 player. I do own one now for
more than 7 months. Usually they are cheap but yet very friendly and easy to get
on. What are you thinking of? Explore these beauties by miniaturization.

For early entries on mp3
players please visit this post. However, below the same extract for MP3, MP4,
MP5, 3a, MTV, DMV, MPV and AMV.

Wikipedia goes as this:  
flash based MP3 player, mostly manufactured in China, capable of viewing images,
videos, and text files. Although commonly called MP4 Players, they really can't
play MP4 format videos. They are limited to proprietary file formats like MTV,
DMV, MPV, AMV and similar formats.

MTV Video Format

MTV Video format
was created with the idea to have some video playback capabilities on
inexpensive mp3 player hardware with almost no additional implementation cost.
MTV is a format that will quickly flip through raw image frames while at the
same time playing MP3 audio.

The MTV format
consists of a file header of 512 bytes length, followed by alternating image and
audio frames. While the audio frames are encoded with MPEG1 Audio Layer 3 (aka
MP3), the image information is stored in uncompressed raw format, according to
the the players display hardware specification.

During decoding
of the video stream, the audio frames are passed to the mp3 hardware decoder,
while the memory pointer of the display hardware is simply adjusted to the next
raw image within the video stream. While this concept does not require
additional hardware for the decoding process, it leads to huge memory
requirements as no compression is applied to the image information.

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