Convert VFW to AMR
Total Audio MP3 Converter converts VFW files to AMR format.
The software is an all in one audio converter that supports more than 90 audio
and video files as input, and converts to popular formats such as MP3, WAV, AAC,
M4A, OGG, WMA, and AMR.
Total Audio MP3 Converter also supports batch conversion, and is full compatible
with Vista and Windows
- Free Download
Total Audio MP3 Converter here and then install the software
- Launch Total Audio MP3 Converter
- Choose VFW Files
Click "Add Files" to choose VFW files and then add them to conversion
Choose one or more VFW files you want to convert and then click Open.
- Choose "to AMR"
- Convert VFW to AMR
Click button "Convert" to convert all VFW files to AMR format.
The software is converting VFW files to AMR format.
- Play & Browse
When conversion completes, you could right-click converted item and choose "Play
Destination" to play the destination file; or choose "Browse Destination
Folder" to open Windows Explorer to browse the destination file.
What is VFW?
VFW file is known as a Video for windows image format. The format is similar to
the .AVI format. The file can be used on Windows and Mac platform. The VFW file
can be opened by video player, like Windows Media Player.
What is AMR?
Adaptive Multi-Rate (AMR) is an audio data compression scheme optimized for speech
coding. AMR was adopted as the standard speech codec by 3GPP in October 1998 and
is now widely used in GSM and UMTS. It uses link adaptation to select from one
of eight different bit rates based on link conditions. AMR is also a file format
for storing spoken audio using the AMR codec. Many modern mobile telephone handsets
will allow you to store short recordings in the AMR format. There also exists
another storage format for AMR that is suitable for applications with more advanced
demands on the storage format, like random access or synchronization with video.
This format is the 3GPP-specified 3GP container format based on ISO base media
- Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to
- The AMR codec uses eight source codecs with bit-rates of 12.2, 10.2, 7.95,
7.40, 6.70, 5.90, 5.15 and 4.75 kbit/s.
- Generates frame length of 95, 103, 118, 134, 148, 159, 204, or 244 bits for
bit rates 4.75, 5.15, 5.90, 6.70, 7.40, 7.95, 10.2, or 12.2 kbit/s, respectively
- AMR utilizes Discontinuous Transmission (DTX), with Voice Activity Detection
(VAD) and Comfort Noise Generation (CNG) to reduce bandwidth usage during silence
- Algorithmic delay is 20 ms per frame. For bit-rates of 12.2, there is no 'algorithm'
look-ahead delay. For other rates, look-ahead delay is 5 ms. Note that there is
5 ms 'dummy' look-ahead delay, to allow seamless frame-wise mode switching with
the rest of rates.
- AMR is a hybrid speech coder which uses Algebraic Code Excited Linear Prediction
- The complexity of the algorithm is rated at 5, using a relative scale where
G.711 is 1 and G.729a is 15.
- PSQM testing under ideal conditions yields Mean Opinion Scores of 4.14 for
AMR (12.2 kbit/s), compared to 4.45 for G.711 (u-law)
- PSQM testing under network stress yields Mean Opinion Scores of 3.79 for AMR
(12.2 kbit/s), compared to 4.13 for G.711 (u-law)
Convert VFW to AMR Related Topics:
MP2 to AMR,
MPC to AMR,
MJ2 to AMR,
AC3 to AMR,
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WM to AMR,
ULAW to AMR,
QT to AMR,
F4V to AMR,
H264 to AMR,
DV to AMR,
PVA to AMR,
MPGA to AMR,
DIF to AMR,
CDA to AMR,
3G2 to AMR,
ALAW to AMR,
WMA to AMR,
SWF to AMR,
RPL to AMR,
NSA to AMR,
UMX to AMR,
OGM to AMR,
SOL to AMR,
NSV to AMR,
ROQ to AMR,
H263 to AMR,
MP4 to AMR,
IT to AMR,
SND to AMR,
M4B to AMR,
MOV to AMR,
AVI to AMR,
MO3 to AMR,
M2TS to AMR,
EVO to AMR,
DVR-MS to AMR,
M1V to AMR,
APE to AMR,
OGG to AMR