最終更新:2014-10-03 (金) 08:51:14 (3502d)
カラーマッチングディスクリプタ
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概要
- The Color Matching descriptor is an optional descriptor used to describe the color profile of the video data in an unambiguous way.
- Only one instance is allowed for a given format and if present, the Color Matching descriptor shall be placed following the Video and Still Image Frame descriptors for that format.
フィールド
| Offset | Field | Size | Value | Description |
| 0 | bLength? | 1 | Constant | 6 |
| 1 | bDescriptorType | 1 | Number | CS_INTERFACE type |
| 2 | bDescriptorSubType | 1 | Number | VS_COLORFORMAT |
| 3 | bColorPrimaries? | 1 | Number | |
| 4 | bTransferCharacteristics? | 1 | Number | |
| 5 | bMatrixCoefficients? | 1 | Number |
3:bColorPrimaries?
- This defines the color primaries and the reference white.
|0|Unspecified (Image characteristics unknown)
1 BT.709, sRGB (default) 2 BT.470-2 (M) 3 BT.470-2 (B, G) 4 SMPTE 170M 5 SMPTE 240M 6-255 Reserved
4:bTransferCharacteristics?
- This field defines the opto-electronic transfer characteristic of the source picture also called the gamma function.
0 Unspecified (Image characteristics unknown) 1 BT.709 (default) 2 BT.470-2 M 3 BT.470-2 B, G 4 SMPTE 170M 5 SMPTE 240M 6 Linear (V = Lc) 7 sRGB (very similar to BT.709) 8-255 Reserved
5:bMatrixCoefficients?
- Matrix used to compute luma and chroma values from the color primaries.
0 Unspecified (Image characteristics unknown) 1 BT. 709 2 FCC 3 BT.470-2 B, G 4 SMPTE 170M (BT.601, default) 5 SMPTE 240M 6-255 Reserved
