Displaying 3 results from an estimated 3 matches for "codebook_entries".
2006 May 10
2
Codebook decoding help
...codebook_lengths but this does not work.
We followed the instructions in the Vorbis 1 specification script (chapter 3 - Codebooks) but we didn't understand, how it works.
So, what we can do is:
- reading the 24 bit sync-pattern (0x564342)
- reading the 16 codebook_dimensions
- reading the 24 codebook_entries
Afterwards the script says: "Next read the ordered bit flag" and so we read the 8th byte containing the ordered bit-flag.
byte 8: [ x] [ordered]
Now the script says: "If the ordered bit is unset do that, if it's set than to that ...".
So we proceeded in pro...
2002 Jul 20
3
Vorbis 1.0 spec notes, part 1
...( [sign] is nonzero )"
- question: What are the tolerances on this function? Is it acceptable
for me to cast mantissa to double, multiply it by the double returned
from pow(2,(dobule)(exponent-788)), and cast the result to float?
* lookup1_values
- given:
return_value ^ codebook_dimensions = codebook_entries
-> is this correct: ? (I'm out of school so my algebra is slacking...)
-> return_value = log(codebook_entires) / log(codebook_dimensions)
-> where return_value truncates the double result to int?
<p>vorbis-spec-codebook.html
* introduce the variable codebook_codeword_lengths ear...
2015 Feb 26
2
Vorbis I spec errata: single entry codebooks
...debooks should be encoded.
As such, the above addition made in r16037 is struck from the
specification and replaced
by the following:
"It is possible to declare a Vorbis codebook containing a single codework en-
try. A single-entry codebook may be either a fully populated codebook with
[codebook_entries] set to 1, or a sparse codebook marking only one entry
used. Note that it is not possible to also encode a [codeword_length] of zero
for the single used codeword, as the unsigned value written to the stream is
[codeword_length]-1. Instead, encoder implementations should indicate a
[codeword...