MP4 was firstly specified as an audio
format with little relation with MPEG-4, and just like the
relationship between MP3 and MPEG-3. But now it tends to be
a video format and equals to MPEG-4 Part 14 with the
extension of *.mp4. It mainly stores digital audio and
WMA is Windows Media Audio. WMA is a
new audio format developed by Microsoft well known as MP3.
With a higher rate in files compression and better sound
quality than the latter, even far beyond those of RA.
To convert mp4 to wma file, please
install the appropriate mp4 decoder and audio decoder for
the mp4 format such as
FFDSHOW, DivX, XviD etc.
which can convert mp4 to wma file. Select an mp4 file, set
the start time, the end time or audio encoding bitrate if
needed. The bitrate is bigger, the file size is bigger, the
audio quality is higher, and vice versa. Click the Convert
button to convert mp4 to wma.
HDTV means High Definition Television
which provides broader screen and higher definition than VCD
or even DVD. HDTV technology having the best audio and video
is the highest standard of DTV (Digital Television). The
resolution of HDTV could reach as high as 1920 ◊ 1080 while
the frame rate could reach to 60 fps. Besides, it adopts
digital technology thus signalís anti-noise ability enhances
Please install HDX4 HDTV or FFDSHOW or
other codecs for HDTV to wma.
DVB stands for Digital Video
Broadcasting. Itís a series of international recognized open
standards for digital TV maintained by DVB Project, an
industrial organization formed by over 300 members and
launched by Joint Technical Committee formed by European
Telecommunications Standards Institute (ETSI), European
Committee for Electrotechnical Standardization (CENELEC) and
European Broadcasting Union (EBU). DVB transmission system
makes use of all common television broadcasting transmission
media including satellite, cable, terrestrial, SMATV, MNDSD,
whose DVD Standards are respectively are DVB-S, DVB-C, DVB-T,
DVB-SMATV, DVB-MS and DVB-MC.