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Convert CD to AMR
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Total Audio MP3 Converter converts CD 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 CD Files
Click "Add Files" to choose CD files and then add them to conversion
list.
Choose one or more CD files you want to convert and then click Open.
- Choose "to AMR"
- Convert CD to AMR
Click button "Convert" to convert all CD files to AMR format.
The software is converting CD 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 CD?
A Compact Disc (also known as a CD) is an optical disc used to store digital data,
originally developed for storing digital audio. The CD, available on the market
since October 1982, remains the standard physical medium for sale of commercial
audio recordings to the present day.
Standard CDs have a diameter of 120 mm and can hold up to 80 minutes of audio
(700 MB of data). The Mini CD has various diameters ranging from 60 to 80 mm;
they are sometimes used for CD singles or device drivers, storing up to 24 minutes
of audio.
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 CD to AMR Related Topics:
MP3 to AMR,
FLV to AMR,
WAV to AMR,
MP4 to AMR,
AU to AMR,
PVA to AMR,
AMR Converter,
QCP to AMR,
PSX to AMR,
FLAC to AMR,
GXF to AMR,
DV to AMR,
AMR to MP4,
RPL to AMR,
DIVX to AMR,
VCD to AMR,
XM to AMR,
VMD to AMR,
OMA to AMR,
F4B to AMR,
MKA to AMR,
SOL to AMR,
M4B to AMR,
MPC to AMR,
MVI to AMR,
OGM to AMR,
ALAC to AMR,
MLP to AMR,
M2V to AMR,
H263 to AMR,
TTA to AMR,
NSV to AMR,
SPX to AMR,
M1A to AMR,
SND to AMR,
SDP to AMR,
Resample AMR,
AMR to AWB,
F4A to AMR,
XA to AMR
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