MJ2 to AWB
Convert MJ2 to AWB, MJ2 to AWB Converter
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AMR MP3 Converter converts MJ2 files to AWB 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 AWB.
AMR MP3 Converter also supports batch conversion, and is full compatible with Vista and Windows 7.
What is MJ2?
MJ2 files may be produced by digital cameras that capture video; they are also used in medical and satellite imagery.
Object-oriented file wrapper based on ISO_BMFF, designed for time-based audio-visual information, including video, audio, and other tracks. Some elements that are part of a content presentation may also be outside the file and incorporated by reference.
In contrast to the temporal or inter-frame compression found in formats like MPEG-2, MPEG-4_V, and MPEG-4_AVC, MJP2 frames are represented as separate entities encoded with J2K_C (lossy or lossless). Comments from specialists indicate that image data may take the form of codestreams (sometimes called .j2c files) or fully realized JPEG 2000 (Part 1) files (.j2p). In the former instance, additional metadata pertaining to things like color space may have to be added to the file.
The format supports LPCM encoding (as "raw" or "twos-complement" data) with no stated limit on sampling or bit depth. The simple profile, however, is limited to a single audio track, not to exceed 48 kHz and 16 bits. The format also supports tracks using any encoding specified in MPEG-4.
What is AWB?
AMR-WB is codified as G.722.2, an ITU-T standard speech codec, formally known as Wideband coding of speech at around 16 kbit/s using Adaptive Multi-Rate Wideband (AMR-WB). G.722.2 AMR-WB is the same codec as the 3GPP AMR-WB. The corresponding 3GPP specifications are TS 26.190 for the speech codec and TS 26.194 for the Voice Activity Detector.
A common file extension for AMR-WB file format is .awb. There also exists another storage format for AMR-WB 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. 3GP also allows use of AMR-WB bit streams for stereo sound.
The AMR-WB bitrates are 6.60, 8.85, 12.65, 14.25, 15.85, 18.25, 19.85, 23.05 and 23.85 kbps. Compared to narrowband speech codecs (like AMR) optimized for traditional telephone voice quality of 300-3400 Hz, the AMR-WB codec's wider bandwidth of 50-7000 Hz provides excellent speech quality.
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