mirror of https://github.com/xiph/flac
29a28338c3
Adds two new apodization functions that seem to perform better than the apodization functions currently in the codebase and fixes three existing windows as well. Its important to note that this patch only affects the encoder stage that evaluates various possible predictors. Audio encoded with these new windows will still decode with existing legacy decoders. = Theory = These functions are used to window the audio data at the predictor stage. These news functions enable the use of only part of the signal to generate a predictor. This helps because short transients can introduce noise into the predictor. The predictor becomes very good at prediciting one part of the signal, instead of mediocre for the whole block. Signed-off-by: Erik de Castro Lopo <erikd@mega-nerd.com> |
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