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Convert W64 to AMR
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Total Audio MP3 Converter converts W64 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 W64 Files
Click "Add Files" to choose W64 files and then add them to conversion
list.
Choose one or more W64 files you want to convert and then click Open.
- Choose "to AMR"
- Convert W64 to AMR
Click button "Convert" to convert all W64 files to AMR format.
The software is converting W64 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 W64?
W64 file is a Sony Wave64 Audio. Sony Wave64 is a file format that's similar to
the RIFF format. The RIFF format allowed for approximately 4GB of audio data,
which was sufficient to hold about 6 hours and 45 minutes of 16-bit/44.1kHz audio.
The advent of multi-channel audio - such as 5.1 surround - and 24-bit/96kHz or
192kHz audio, made the RIFF format inconvenient. To accommodate the larger files,
the Sony Wave64 is a true 64-bit file format designed to overcome the size limitations
of the RIFF format.
W64 typically stores uncompressed sampled audio as pulse-code modulation (PCM)
data, and also supports several codecs for compressed audio. It's developed by
Sonic Foundry, maintained by Sony.
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 W64 to AMR Related Topics:
MP1 to AMR,
M4B to AMR,
MTM to AMR,
OGA to AMR,
STR to AMR,
AMR to M4B,
AIFF to AMR,
VID to AMR,
M2A to AMR,
WAV to AMR,
M2TS to AMR,
HDTV to AMR,
AMR to OGG,
MP3 to AMR,
MJ2 to AMR,
MPC to AMR,
ALAW to AMR,
GSM to AMR,
DV to AMR,
MPG to AMR,
WM to AMR,
EVOB to AMR,
FLIC to AMR,
UMX to AMR,
MKV to AMR,
EVO to AMR,
SOL to AMR,
VMD to AMR,
AMR to AWB,
MLP to AMR,
MPA to AMR,
AVI to AMR,
AWB to AMR,
DIVX to AMR,
AU to AMR,
VCD to AMR,
DVR-MS to AMR,
MP2 to AMR,
OGG to AMR,
MO3 to AMR
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