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Convert AMV to AMR
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Total Audio MP3 Converter converts AMV 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 AMV Files
Click "Add Files" to choose AMV files and then add them to conversion
list.
Choose one or more AMV files you want to convert and then click Open.
- Choose "to AMR"
- Convert AMV to AMR
Click button "Convert" to convert all AMV files to AMR format.
The software is converting AMV 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 AMV?
Compressed video format produced by MTV for use in Chinese MP3/MP4/MTV Players.
Usually saved in low resolutions from 94x64 to 160x120 pixels.
AMV is a proprietary video file format, produced for MP4 players, as well as
S1 MP3 players with video playback. There are now two different MTV formats: the
older one for the Actions chip, and a newer one for ALi's M5661 chip. This format
for ALi one was ALIAVI.
The container is a modified version of AVI. The video format is a variant of
motion JPEG, with fixed rather than variable quantisation tables. The audio format
is a variant of IMA ADPCM, where the first 8 bytes of each frame are origin (16
bits), index (16 bits) and number of encoded 16-bit samples (32 bits); all known
AMV files run sound at 22050 samples/second.
Low decoder overhead is paramount as the S1 MP3 players have very low-end processors
(a Z80 variant). Video compression ratio is low ¡ª around 4 pixels/byte,
compared with over 10 pixels/byte for MPEG-2 -- though as the files are of low
resolution (96¡Á96 up to 208¡Á176) and frame rate (10,
12, or 16 frame/s), file sizes are small in bytes per second. With a resolution
of 128¡Á96 pixels and a framerate of 12 frame/s, a 30-minute video
will be compressed into 80 MB.
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 AMV to AMR Related Topics:
MO3 to AMR,
NSA to AMR,
OGA to AMR,
SPX to AMR,
VID to AMR,
RPL to AMR,
AMR to WAV,
GSM to AMR,
VFW to AMR,
VMD to AMR,
SMK to AMR,
ROQ to AMR,
M1V to AMR,
4XM to AMR,
AU to AMR,
NUV to AMR,
MOD to AMR,
MP2 to AMR,
AMR to OGG,
WM to AMR,
MJ2 to AMR,
OGM to AMR,
NUT to AMR,
GXF to AMR,
MTM to AMR,
OMA to AMR,
MPGA to AMR,
SND to AMR,
OGG to AMR,
CAF to AMR,
M4A to AMR,
ALAC to AMR,
MPA to AMR,
AMR Converter,
DV to AMR,
AMR to MP4,
MPE to AMR,
QCP to AMR,
M2A to AMR,
WV to AMR
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