atrac3p:serialized_quantization_unit_levels
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| Both sides previous revisionPrevious revisionNext revision | Previous revisionLast revisionBoth sides next revision | ||
| atrac3p:serialized_quantization_unit_levels [2010/07/23 18:14] – base table -> prediction vector megadiscman | atrac3p:serialized_quantization_unit_levels [2010/10/25 12:23] – Mode3/master has first delta with offset when using extended base tables. megadiscman | ||
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| === 2 (on master channel): Huffman-encoded delta === | === 2 (on master channel): Huffman-encoded delta === | ||
| - | A base table from the extended prediction vectors is chosen (basic vectors are not accessible in this mode). For each quantization unit, a 4-bit-delta value is stored as a huffman code in the selected 4-bit-tree. The difference is applied with sign expansion (so the tree codes are -7 to 7) and wrap-around. | + | A vector |
| === 2 (on slave channel): Delta-encoded difference to master === | === 2 (on slave channel): Delta-encoded difference to master === | ||
| Line 86: | Line 86: | ||
| * 6 bit: level of quantization unit 0/1/2 for base | * 6 bit: level of quantization unit 0/1/2 for base | ||
| * 6 bit: selection of level table from [[extended level prediction vectors]] | * 6 bit: selection of level table from [[extended level prediction vectors]] | ||
| - | * 4 bit: level delta for quantization unit 0 | + | * 4 bit: level delta for quantization unit 0, offset by 8 (so -8..7 are possible) |
| * for remaining quantization units | * for remaining quantization units | ||
| * huffman code representing delta between previous and this level (sign expanded) | * huffman code representing delta between previous and this level (sign expanded) | ||
atrac3p/serialized_quantization_unit_levels.txt · Last modified: 2010/10/25 13:01 by megadiscman