Differences between MP3 and WMA
MP3 is a very popular digital audio coding and lossy compression format.
Its full name is Moving Picture Experts Group Audio Layer III. It
abandons some data of PCM audio data that is not important to human
auditory system so as to decrease file size to the maximum extent. There
are a lot of technologies that are used in making MP3, including applying
psychoacoustics to make sure which part of audio files can be discarded.
MP3 audio can be compressed according to different bit rate, which provides
a range to offset between data size and sound quality. As a result, it
greatly lower data size while the acoustic fidelity of files compressed is
not worse than that of originals obviously, to most of users. MP3 was
invented and standardized by a group of engineers of Fraunhofer-Gesellschaft located in Erlangen, Germany in 1991.
The Advantage of MP3
MP3 and WMA are two different kinds of music formats and many
converting software can convert audio files of other formats to
these two popular ones.
128kbps of MP3 and 64kbps of WMA
128kbps of MP3 and 96kbps of WMA
128kbps of MP3 and 128kbps of WMA
160kbps of MP3 and 128kbps of WMA
192kbps of MP3 and 192kbps of WMA
In terms of the former two ones, the acoustic fidelity of WMA is better
than MP3 while MP3 becomes better than WMA in the condition of the last
two kinds of bit rate. But when it turns to under the third circumstance,
there is not big deference between MP3 and WMA. That is because when the
compression rate is above 128k, the quality of WMA do not improve a bit
but MP3 quality is upgraded a lot.
Comparison between MP3 and WMA
According to what Microsoft said that WMA of 64kbps has the same quality
as MP3 of 128kbps when it is compressed by WMP7. However, when used WMP8
for compression, WMA will as good as MP3 of 128kbps when its bit rate is
only at 48kbps. Actually, WMA do not have such effect though it has advanced
technology. We discovered the following things after comparing these two
formats:
1. Under the same data rate, like 128kbps, WMA does better than MP3 in
quality;
2. Under low data rate, fidelity of WMA is much higher than that of MP3.
When the bit rate is 64kbps, quality of WMA is almost the same as it is when
its bit rate is at 128kbps. But things is totally different in MP3. When a
song of WMA format at 32kbpes can be heard, MP3 of the same bit rate can't.
3. MP3 is absolutely a very successful calculating way. It is can be heard
when its bit rate reaches 128kbps and its quality can become great when
using VBR compression of bit rate above 128kbps. But the data rate limit of
MP3 is 128kbps, if bit rate is lower than this number, the effect will be
decreased a lot.
In a word, WMA mainly improve playback of high-frequency signal under very
low data rate. When the bit rate is higher than 128kbps, it has no advantage
over MP3 and its high-frequency distortion is very serious. But WMA is a best
choice for compressing English listening materials. One thing you should
remember in mind is that MP3 of 128kbps is better than WMA of 64kbps and
even much better than 48kbps, for treble part of song played in WMA format
has metallic sound--larger distortion.
Uncompressed WMA format is the best, but songs of WMA formats downloaded
from internet are compressed. That is why they sound not as good as MP3.
Below 128kbps, WMA and MP3 nearly have no differences but it takes advantage
over MP3 for the file is smaller. However when bit rate is above 128kbps or
larger, MP3 is better than WMA.
There are a lot of arguments about which is better between WMA and MP3. Both
of them are lossy compression encoding formats and have their own merits.
Technically, WMA is better than MP3 in its low bit rate. When bit rate is
lower than 128kbps, WMA is the best. The lower bit rate is, the better of WMA
you will feel. And with streaming playing support, WMA is a very popular form
at used on the internet. If your computer is tight on disk space and you
demand higher sound quality, WMA is no doubt a best choice. When bit rate is
increase to 128k, WMA is the best among all levels of lossy encoding formats.
But when it comes to MP3, high-frequency is obviously lost. It seems that
128k is a turning point, when the bit rate is upper, the acoustic fidelity
does not change a lot. When bit rate comes to 192kbps, MP3 will become a
little better than WMA in quality. So if your computer has enough capacity
and you have higher requirement on audio quality, then you should choose MP3
of high bit rate (from 192kbps320kbps). But encoder's selection is also
important.
MP3 is a smaller size file of compression rate of 1:10 or even 1:12 by using
audio compression technology, which can maintain finer acoustic fidelity.
WMA is an audio compression format developed by microsoft, which is later ,
smaller and better than MP3. The biggest difference between these two formats
is that standard of WMA is made by Microsoft while MP3 is an open criteria
without copyright problem, which makes it more popular than WMA.
