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Convert VQF to AMR
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Total Audio MP3 Converter converts VQF 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
7.
- Free Download
Total Audio MP3 Converter here and then install the software
by instructions
- Launch Total Audio MP3 Converter
- Choose VQF Files
Click "Add Files" to choose VQF files and then add them to conversion
list.
Choose one or more VQF files you want to convert and then click Open.
- Choose "to AMR"
- Convert VQF to AMR
Click button "Convert" to convert all VQF files to AMR format.
The software is converting VQF 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.
Top
What is VQF?
TwinVQ Audio File that is developed by the Nippon Telegraph and Telephone Corporation
(NNT Labs); uses transform-domain weighted interleaved vector quantization to
compress audio data; can be encoded in 80, 96, 112, 128, 160, and 192 kbps bitrates.
The VQF format has also been marketed by Yamaha under the name "SoundVQ."
VQF files are songs or music created with a specialized type of encoding known
as transform-domain weighted interleaved vector quantization.
VQF files are compressed, meaning that the music is made smaller to take up
less space or memory on your computer, on a CD or DVD. VQF files can be saved
at six different speeds or bitrates with the 80kb per second files being the lowest
quality and the 192kb per second being the highest quality.
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
file format.
Key Features:
- Sampling frequency 8 kHz/13-bit (160 samples for 20 ms frames), filtered to
200-3400 Hz.
- 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
periods
- 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
(ACELP)
- 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 VQF to AMR Related Topics:
ALAW to AMR,
NSV to AMR,
DAT to AMR,
XA to AMR,
FLIC to AMR,
M1A to AMR,
SOL to AMR,
RPL to AMR,
VOC to AMR,
3G2 to AMR,
GSM to AMR,
WAVE64 to AMR,
AC3 to AMR,
DIF to AMR,
M2A to AMR,
SWF to AMR,
W64 to AMR,
MJ2 to AMR,
OGG to AMR,
MPC to AMR,
UMX to AMR,
OGA to AMR,
3GPP to AMR,
4XM to AMR,
FLV to AMR,
M2TS to AMR,
MPGA to AMR,
SND to AMR,
CAF to AMR,
WAV to AMR,
DV to AMR,
WV to AMR,
MPE to AMR,
SPX to AMR,
VFW to AMR,
MP1 to AMR,
CDA to AMR,
WMV to AMR,
TTA to AMR,
MP4 to AMR
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