RealAudio atrc
(Redirected from ATRC)
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- FOURCC: atrc
- Company: Sony, Real
- Samples: http://samples.mplayerhq.hu/real/AC-atrc/
Found in some old RealMedia files. The same as the ATRAC3.
Scrambling
In RealMedia files, the ATRAC3 bitstream is scrambled. To unscramble the stream, perform a XOR on every 32 bits in the frame. The hex value to XOR with is 0x537F6103.
Extra data format
In RealMedia files, ATRAC3 extra data has the following format (big-endian order):
INT32 id, always 4 INT16 samples per frame, always 1024 * 2 INT16 delay, not used but always 0x88E INT16 stereo coding mode, 2 - normal stereo, 0x12 - joint stereo
The length of this data is always 10 bytes.