DAT is a VCD file extension used in the
Microsoft Windows Operating System to mean "video data"
normally. It can be encoded with MPEG 1.0, 1.1, 2.0
ASF is Advanced
Streaming Format. It is an extensible file format developed
primarily for storing synchronized digital video, audio,
subtitle streams, or transmitting data on the internet. ASF
is also a multimedia container of Windows Media Video or
Windows Media Audio.
To convert DAT to asf file, if the dat
file is encoded with mpeg1.0 format, you do not need to
install any additional dat decoder. If the dat file is
encoded with mpeg1.1 or 2.0 format, please install DVD
players which include the appropriate dat codec. Please
ensure the *.dat file is video file and Windows Media Player
can play it because many other files also use this kind of
extension. VISTA has bundled DAT 1.1/2.0 decoder.
ASF Converter which can
convert dat to asf file. Select a dat file, Change the
output format to ASF in the Options dialog box, configure some
parameters such as the video encoding bitrate, audio
encoding bitrate, resolution, frame rate etc if necessary.
H.261 is the first practical digital
video coding standard designed by ITU-T to develop
conference TV and video telephony on ISDN. It becomes the
design framework of later International Standard of Video
Coding including MPEG-1, MPEG-2/H.262 and H.263. H.261. It
only deals with CIF and QCIF image formats by dividing every
frame into images layer, Acer block group layer, Acer block
and block layer. H.261 output rate is constant, while the
image quality is unsteady.
H.263 is the standard draft of ITU-T
designed for low bit-stream communications. Actually the
standard could be used in broader bitstream scope but not
limit to low bit-stream. Whatís more, itís thought to be
used to replace H.261.The coding algorithm of H.263 is the
same with that of H.261.but thereíre still some differences.
e.g. H.263 adopts semi-precision for motion compensation
while H.261 adopts all pixel accuracy and filtering cycle;
H.263 contains four consultable options to improve
After install H.261 or H.263
decoder, asf converter can convert h.261/h.263 to asf file.