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Convert F4A to AMR
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Total Audio MP3 Converter converts F4A 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 F4A Files
Click "Add Files" to choose F4A files and then add them to conversion
list.
Choose one or more F4A files you want to convert and then click Open.
- Choose "to AMR"
- Convert F4A to AMR
Click button "Convert" to convert all F4A files to AMR format.
The software is converting F4A 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 F4A?
A file with the F4A file extension is a Flash MP4 Audio Stream file. The F4A file
type is primarily associated with 'Flash' by Adobe Systems Incorporated. Adobe
Flash, initially known as Shockwave Flash and popularly called simply Flash, refers
to both the Adobe Flash Player and to the Adobe Flash Professional multimedia
authoring program. The Flash Player, developed and distributed by Adobe Systems
(which acquired Macromedia in a merger that was finalized in December 2005), is
a client application available in most common web browsers. F4A files are audio-only
MP4 files.
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 F4A to AMR Related Topics:
3GPP to AMR,
MMF to AMR,
M4A to AMR,
ALAW to AMR,
3GP to AMR,
H264 to AMR,
DXA to AMR,
AC3 to AMR,
ASF to AMR,
OMA to AMR,
OGA to AMR,
DIVX to AMR,
WV to AMR,
ULAW to AMR,
VOC to AMR,
MXF to AMR,
MPE to AMR,
3G2 to AMR,
CD to AMR,
WMV to AMR,
IT to AMR,
MOD to AMR,
DTS to AMR,
RPL to AMR,
DVR-MS to AMR,
AMR to M4B,
S3M to AMR,
AU to AMR,
VQF to AMR,
4XM to AMR,
AMR Converter,
XVID to AMR,
MP1 to AMR,
GXF to AMR,
AMR to AAC,
QCP to AMR,
MP4 to AMR,
HDTV to AMR,
MVI to AMR,
MTV to AMR
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