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java - How to read and modify amr audio file data? - Stack ...
https://stackoverflow.com/questions/11087207/how-to-read-and-modify-amr-audio-file-data
According to the AMR file format at:http://developer.nokia.com/community/wiki/AMR_format AMR files have a 6 byte header, followed by a set of audio frames, each with a 1 byte header. Each audio frame is 20 ms long and has and the sample rate is given in the header of each frame. so to read the sample rate for the …
java - Extract audio frames from AMR-NB file - Stack …
https://stackoverflow.com/questions/17489970/extract-audio-frames-from-amr-nb-file
I considered the first 6 bytes of the file to be the header and the following information is audio frames. Each audio frame is composed by frame header and audio data. Frame header tells the frame's size in bytes (using CMR Mode table - http://www.developer.nokia.com/Community/Wiki/AMR_format). The frame size is stored in …
header('Content-type: audio/amr');$query = mysql_query ...
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http://sharetechnote.com/html/IMS_SIP_RTP_AMR.html
AMR stands for Adaptive-Multi Rate. It is a kind of codec algorithm to carry audio data. As it stands for, it can adatively change the coding rate depending on various conditions. AMR Header Structure AMR Data Structure Examples Example 01 > AMR - CMR(15), FT(7) Example 02 > AMR - CMR(15), FT(8) Example 03 > AMR - CMR(0), FT(8)
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