as far as I remember, that's uncompressed 16 bit integer data commonly used in WAV or AIFF files. I can't remember whether it is little endian (as in WAV) or big endian (as in AIFF), in any case it's PCM.
I hope this helps you, although I don't understand why you're asking such stuff
VideoLAN
Felix Paul Kühne
Medic. VLC developer for appleOS since before you were born.
Blog: https://www.feepk.net