Displaying 4 results from an estimated 4 matches for "vorbis_mapping_mux".
2003 Mar 15
0
mapping mux vector question
Hello everybody
According to "vorbis-spec-ref.html"
paragraph: "mappings", the vector [vorbis_mapping_mux]
should contain the following:
4.
if [vorbis_mapping_submaps] is greater than one, we read channel multiplex settings.
For each [j] of [audio_channels] channels:
1. vector [vorbis_mapping_mux] element [j] = read 4 bits as unsigned integer
2. if the value is greater than the highes...
2013 Jul 18
0
Help understand decoding of stereo vorbis data
...ikely something to do with my handling of floor decode/curve synthesis. My first thoughts are that I'm handling the submap number/floor mapping incorrectly;
I'm interested in finding out about this from the documentation;
(4.3.2. floor curve decode)
[submap_number] = element [i] of vector [vorbis_mapping_mux]
What happens if during mapping decoding vorbis_mapping_mux is empty because vorbis_mapping_submaps was 1? Do both channels use the single submap in this case?
Also, I'm noticing that in this same situation, I'm getting a vorbis_floor_count of 2. What's the purpose of the second floor...
2003 Mar 16
2
Some Questions
...= vector [floor1_partition_class] element [i]
^^^^^^^^^^^^^^^^^^^
is floor1_partition_class correct ? or should it be
floor1_partition_class_list
<p>3---------------
According to "vorbis-spec-ref.html"
paragraph: "mappings", the vector [vorbis_mapping_mux]
should contain the following:
4.
if [vorbis_mapping_submaps] is greater than one, we read channel multiplex settings.
For each [j] of [audio_channels] channels:
1. vector [vorbis_mapping_mux] element [j] = read 4 bits as unsigned integer
2. if the value is greater than the highes...
2015 Aug 16
0
Questions about the accuracy of the spec
...lished on Feb 27.
1. On page 34 section 4.3.4., explanation of the situation where there are only one submap is omitted,
and it is difficult to understand that the decoder should assume in such cases that all the audio channels belong to submap #0 in the original order without
examining the array [vorbis_mapping_mux] (which is empty).
2. On page 58 section 8.5., it is unclear as to which of the following implementation is correct:
? A. For each partition, decode a vector the size of [partition_size] * [ch] according to Format 1 and deinterleave. Repeat the process over all partitions. (wrong)
? B. Decode a si...