@@ -709,3 +709,25 @@ delta's absolute value sum, below. In this example, @\[*D] sup 1@'s value of 26 is the smallest. Therefore, when compressing this set of samples in a FIXED subframe, it is best to use a predictor order of 1. +.PP +The predictor order indicates how many warm-up samples to take from +the PCM stream. +Determining the residual values can then be done automatically +based on the current @"Sample" sub i@ and previously encoded samples, or +warm-up samples. +.TS +tab(:); +| c | c | +| c | c | +| c | l |. +_ +Predictor:Calculation +Order:\^ += +0:@"Residual" sub i = "Sample" sub i@ +1:@"Residual" sub i = "Sample" sub i~~-~~"Sample" sub {i~-~1}@ +2:@"Residual" sub i = "Sample" sub i~~-~~((2 * "Sample" sub {i~-~1})~~-~~"Sample" sub {i~-~2})@ +3:@"Residual" sub i = "Sample" sub i~~-~~((3 * "Sample" sub {i~-~1})~~-~~(3 * "Sample" sub {i~-~2})~~+~~"Sample" sub {i~-~3})@ +4:@"Residual" sub i = "Sample" sub i~~-~~((4 * "Sample" sub {i~-~1})~~-~~(6 * "Sample" sub {i~-~2})~~+~~(4 * "Sample" sub {i~-~3})~~-~~"Sample" sub {i~-~4})@ +_ +.TE docs/codec_flac.ms 51efce5f561cf4cdf5fcff3367849d7a8c6fd50d Brian Langenberger bjl@usa.net http://github.com/tuffy/python-audio-tools/commit/f41dc759e876f20a6c6e8695b778372b88112caa f41dc759e876f20a6c6e8695b778372b88112caa 2008-05-10T09:18:54-07:00 2008-05-10T09:18:54-07:00 Added the residual encoding functions for FIXED subframes. a0e8f9a82c528b0822b683eb095279a65e9cac41 Brian Langenberger bjl@usa.net