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Convert H263 to AMR
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Total Audio MP3 Converter converts H263 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 H263 Files
Click "Add Files" to choose H263 files and then add them to conversion
list.
Choose one or more H263 files you want to convert and then click Open.
- Choose "to AMR"
- Convert H263 to AMR
Click button "Convert" to convert all H263 files to AMR format.
The software is converting H263 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 H263?
H.263 is a video codec standard originally designed as a low-bitrate compressed
format for videoconferencing. It was developed by the ITU-T Video Coding Experts
Group (VCEG) in a project ending in 1995/1996 as one member of the H.26x family
of video coding standards in the domain of the ITU-T.
H.263 has since found many applications on the internet: much Flash Video content
(as used on sites such as YouTube, Google Video, MySpace, etc.) is encoded in
this format, though many sites now use VP6 encoding, which is supported since
Flash 8. The original version of the RealVideo codec was based on H.263 up until
the release of RealVideo 8.
H.263 is a required video codec in ETSI 3GPP technical specifications for IP
Multimedia Subsystem (IMS), Multimedia Messaging Service (MMS) and Transparent
end-to-end Packet-switched Streaming Service (PSS). In 3GPP specifications is
H.263 video usually used in 3GP container format.
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 H263 to AMR Related Topics:
VCD to AMR,
MTS to AMR,
OGA to AMR,
PVA to AMR,
OGM to AMR,
M4V to AMR,
M4B to AMR,
MPC to AMR,
MOV to AMR,
VQF to AMR,
FLIC to AMR,
FLV to AMR,
DVR-MS to AMR,
MXF to AMR,
S3M to AMR,
H263 to AMR,
VMD to AMR,
M1A to AMR,
TTA to AMR,
SWF to AMR,
F4A to AMR,
WMD to AMR,
SMK to AMR,
3G2 to AMR,
F4V to AMR,
MO3 to AMR,
WV to AMR,
WMV to AMR,
DVD to AMR,
AMR to MP4,
M2V to AMR,
DIF to AMR,
MP1 to AMR,
UMX to AMR,
WAV to AMR,
MLP to AMR,
MOD to AMR,
AMR to AAC,
Resample AMR,
GSM to AMR
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