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Convert MKA to AMR
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Total Audio MP3 Converter converts MKA 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 MKA Files
Click "Add Files" to choose MKA files and then add them to conversion
list.
Choose one or more MKA files you want to convert and then click Open.
- Choose "to AMR"
- Convert MKA to AMR
Click button "Convert" to convert all MKA files to AMR format.
The software is converting MKA 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 MKA?
The Matroska multimedia container formats were derived from a project called MCF,
but differ from it significantly because it is based on EBML (Extensible Binary
Meta Language), a binary derivative of XML. EBML enables future format extensibility,
without breaking file support in old parsers. This is a container, not a CODEC.
Get the parser from the Matroska site. MKA files are typical matroska files containing
only audio information, but no video. These files may typically comprise a complete
music album in one single file, where file chapters mark each song. In addition
to that the file can have attachement like lyrics or cover JPEGs, or even show
a Karaoke subtitle stream.
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 MKA to AMR Related Topics:
MLP to AMR,
AMR to M4B,
AMR to WAV,
UMX to AMR,
RPL to AMR,
OGG to AMR,
MOD to AMR,
AU to AMR,
M4B to AMR,
MP1 to AMR,
XVID to AMR,
VCD to AMR,
ULAW to AMR,
DXA to AMR,
SWF to AMR,
OMA to AMR,
TS to AMR,
3G2 to AMR,
WAV to AMR,
CAF to AMR,
DVD to AMR,
XA to AMR,
SMK to AMR,
AMR to AWB,
DAT to AMR,
SDP to AMR,
APE to AMR,
MPA to AMR,
FLIC to AMR,
QCP to AMR,
WV to AMR,
AMR to MP4,
MTV to AMR,
WM to AMR,
AC3 to AMR,
M1A to AMR,
MPC to AMR,
NUV to AMR,
MVI to AMR,
AAC to AMR
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