search for: floor1_inverse_db_t

Hi, We are two students doing project with Vorbis audio compression for our B.Sc studies. We have two questions: Our first question related to the floor1 inverse dB lookup table. As we understood the floor values encoded as offset integers (Y) from 1 to 256 and then used as index in the floor1_inverse_dB_table to get an encoded value. This value (denoted as X) is inverse of linear frequency so 20*log10(1/X) is dB value. In the basic case if Y is 256 then X = floor1_inverse_dB_table(256) = 1 and the dB value is 0. The encoded value X then multipled by residue and then we get the PCM value. Our questio...

I think the example in the comment has a '-' that shouldn't be there (line 108): /********************************************************************* Encoding using a VBR quality mode. The usable range is -.1 (lowest quality, smallest file) to 1. (highest quality, largest file). Example quality mode .4: 44kHz stereo coupled, roughly 128kbps VBR ret =