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Line 421:
Line 421: − + − ----+ − − I have yet to figure out how to get rid of the noice when decoding sound...--[[User:Pbsds|pbsds]] 17:38, 6 June 2010 (UTC)
→Sound data section
The sound data seems to be a variant of VOX ADPCM @ around 8KHz.
The sound data is 4bit ADPCM with reversed nibbles @ 8kHz.
You can decode the sound yourself with "sox -t ima -N [input] [output]"
==Signature==
==Signature==
The last 0x10-bytes in a PPM are all-zero. The 0x80 bytes before that is a RSA-1024 SHA-1 signature over the whole PPM, excluding the last 0x90 bytes with the signature.
The last 0x10-bytes in a PPM are all-zero. The 0x80 bytes before that is a RSA-1024 SHA-1 signature over the whole PPM, excluding the last 0x90 bytes with the signature.