Dream AMR converter converts AMR audio to MP3, WMA, WAV, OGG, AAC and other audio formats. And convert popular audio formats to AMR audio. Extract AMR audio from various video such as AVI, MP4, FLV, WMV, DivX, etc

The Adaptive Multi-Rate (AMR or AMR-NB) audio codec is a patented 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, both open source and commercial programs exist (see Software support) to convert between this and other formats such as MP3, although it should be remembered that AMR is a speech format and is unlikely to give ideal results for other audio. The common filename extension is .amr. 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.
The frames contain 160 samples and are 20 milliseconds long. AMR uses different techniques, such as ACELP, DTX, VAD and CNG. The usage of AMR requires optimized link adaptation that selects the best codec mode to meet the local radio channel and capacity requirements. If the radio conditions are bad, source coding is reduced and channel coding is increased. This improves the quality and robustness of the network connection while sacrificing some voice clarity. In the particular case of AMR this improvement is somewhere around S/N = 4-6 dB for usable communication. The new intelligent system allows the network operator to prioritize capacity or quality per base station.
There are a total of 14 modes of the AMR codec, 8 are available in a full rate channel (FR) and 6 on a half rate channel (HR).
Features:
* Convert from CD, MP3, WAV, WMA, OGG, AAC, AC3, AIFF, AU, VOX, RAW, PCM, ADPCM, A-LAW, u-LAW, MP2, FLAC, ALAC, CD, M4A, MP4, WavPack, AVI audio to AMR;
* Convert AMR to MP3, WMA, WAV, OGG, AAC, ADPCM, AIFF, AMR, A-LAW, u-LAW, and VOX.
Customize File Size and Format-Dream AMR Converter
File size and the parameters can be flexible to customize and choose
* Choose or Customize
Choose from an array of predefined file formats for conversion or manually set your own file format and then save as your own profile for future use.
* Convert Video Segment
Clip only a segment from a video you choose by specifying the start time and duration.
* Merge Video
If you want to play several segments at one time, you can merge several videos into one file, in the setting page, choose merger into one file.
* Split Video
Split a large file into several so you can fit them to play on your device by segments; you can set a split time or split size so it automatically divides these files uniformly.
References——Dream FLV to mp4 Converter
Supported devices
AMR Converter:MP4,IPhone,Zune,Mobilephone, MP4/MP3 players like iPod, iPhone, Zune, PSP, iRiver, Archos, Creative Zen etc.
Supported Input Formats
Video: WMV, 3GP, MOV, VOB, MPG, ASF, FLV, AVI,RM,RMVB, MP4, MKV, etc
Audio: AMR, WAV, WMA, M4A, MP3, MP2, AAC, AC3, etc.
Supported Output Formats
Audio: AMR, WAV, WMA, M4A, MP3, MP2, AAC, AC3, etc
Systems Requirements
OS Microsoft® Windows XP (SP2 or later), Windows Vista, Windows 7
Processor 1GHz Intel/AMD processor or above
RAM 256MB RAM (512MB or above recommended)
Free Hard Disk 30MB space for installation
Graphic Card Super VGA (800×600) resolution, 16-bit graphics card or higher

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