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premap
2004 Feb 23
2
About lossless and point stereo
...om my understanding, in
Vorbis 1.0, at medium to low quality levels, we use a mix of lossless
stereo and point stereo for different frequency bands, depending on the
values of the adj_stereo structure. Looking at the
precomputed_couple_point function in psy.c, the last two statements:
*mag = premag * floormag;
*ang = 0.f;
eem to imply the angle (diffuse sounds) is set to zero. So point
stereo is essentially monaural, since angle=A-B so if angle is 0, A=B?
Hence Vorbis "joint" stereo is essentially a mix of lossless stereo and
mono, right? It seems like a very strange way of c...