Difference between revisions of "Sierra DPCM"

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m (as well as a DPCM codec)
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This is a set of DPCM codecs used in [[Sierra Audio]] and [[VMD]].
 
This is a set of DPCM codecs used in [[Sierra Audio]] and [[VMD]].
 +
 +
=== Old DPCM ===
 +
Decoding of DPCM is very simple: read nibble, get corresponding delta value from table and update current sample value.
 +
 +
Delta table:
 +
 +
  { 0,  1,  2,  3,  6, 10, 15, 21,
 +
  -21,-15,-10, -6, -3, -2, -1, -0}
 +
 +
=== New DPCM ===
 +
New scheme differs from old one by delta table (note the order of its second part):
 +
 +
  { 0,  1,  2,  3,  6,  10,  15,  21,
 +
  -0, -1, -2, -3, -6, -10, -15, -21}
 +
 +
=== 16-bit DPCM ===
 +
TODO
 +
 +
[[Category:Audio Codecs]]
 +
[[Category:DPCM Audio Codecs]]
 +
[[Category:Game Formats]]
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 +
 +
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=== Old DPCM ===
 
=== Old DPCM ===

Revision as of 20:24, 23 March 2006

This is a set of DPCM codecs used in Sierra Audio and VMD.

Old DPCM

Decoding of DPCM is very simple: read nibble, get corresponding delta value from table and update current sample value.

Delta table:

 { 0,  1,  2,  3,  6, 10, 15, 21,
 -21,-15,-10, -6, -3, -2, -1, -0}

New DPCM

New scheme differs from old one by delta table (note the order of its second part):

 { 0,  1,  2,  3,  6,  10,  15,  21,
  -0, -1, -2, -3, -6, -10, -15, -21}

16-bit DPCM

TODO


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2mg xanax mean the events tramadol generic xanax I Sing the town then adds this evening scattered around

Old DPCM

Decoding of DPCM is very simple: read nibble, get corresponding delta value from table and update current sample value.

Delta table:

 { 0,  1,  2,  3,  6, 10, 15, 21,
 -21,-15,-10, -6, -3, -2, -1, -0}

New DPCM

New scheme differs from old one by delta table (note the order of its second part):

 { 0,  1,  2,  3,  6,  10,  15,  21,
  -0, -1, -2, -3, -6, -10, -15, -21}

16-bit DPCM

TODO