On Fri, 2004-01-23 at 14:56, Josh Coalson wrote: > this patent does not cover the FLAC reference encoder. the > entropy coder does not accumulate occurrences of individual > symbol values, as specified in claim 1; it uses a single > measure (mean or variance) of the overall residual distribution. > > Josh
It could be argued that the mean and variance is computed from the occurrences of individual symbol values; the mean and variance are a way to store those computed values. I mean, how did you figure out the mean and variance of the residual distribution? You looked at the individual occurences of symbols and then came up with a way to represent them. The accumulated values are represented in the mean and variance. The whole thing is silly though. Hufffman computes symbol values. Huffman stores the computed probabilities at the front of the stream. (well, the first version did.. now adays the symbol probabilities are recomputed on the fly after each symbol for speed/storage) Huffman has been around since 1952. A whole slew of coders exist that do the exact same thing. Gzip and Bzip2 being 2 of them. ------------------------------------------------------- The SF.Net email is sponsored by EclipseCon 2004 Premiere Conference on Open Tools Development and Integration See the breadth of Eclipse activity. February 3-5 in Anaheim, CA. http://www.eclipsecon.org/osdn _______________________________________________ Flac-dev mailing list [EMAIL PROTECTED] https://lists.sourceforge.net/lists/listinfo/flac-dev
