DICOM PS3.5 2018a - Data Structures and Encoding

G.6 Example of Elements For An Encoded YCbCr RLE Three-frame Image with Basic Offset Table
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## G.6 Example of Elements For An Encoded YCbCr RLE Three-frame Image with Basic Offset Table

Table G.6-1 is an example of encoding of RLE Compressed Frames (described in Section G.4) with the basic offset table. Table G.6-2 is an example of Item Value data for one frame.

Table G.6-1. Example of Elements for an Encoded YCbCr RLE Three-Frame Image with Basic Offset Table

Pixel Data Element Tag | Value Representation | Data Element Length | Data Element
--- | --- | --- | ---
|  |  |  | Basic Offset Table with Item Value | First Fragment (Frame 1) of Pixel Data
|  |  |  | Item Tag | Item Length | Item Value | Item Tag | Item Length | Item Value
(7FE0,0010) with VR of OB | OB | 0000H | FFFF FFFFH undefined length | (FFFE,E000) | 0000 000CH | 0000 0000H 0000 02D0H 0000 0642H | (FFFE,E000) | 0000 02C8H | RLE Compressed Frame
4 bytes | 2 bytes | 2 bytes | 4 bytes | 4 bytes | 4 bytes | 000CH bytes | 4 bytes | 4 bytes | 02C8H bytes

Table G.6-1b. Example of Elements for an Encoded YCbCr RLE Three-Frame Image with Basic Offset Table (continued)

Data Element Continued
Second Fragment (Frame 2) of Pixel Data | Third Fragment (Frame 3) of Pixel Data | Sequence Delimiter Item
--- | --- | ---
Item Tag | Item Length | Item Value | Item Tag | Item Length | Item Value | Sequence Delimiter Tag | Item Length
(FFFE,E000) | 0000 036AH | RLE Compressed Frame | (FFFE,E000) | 0000 0BC8H | RLE Compressed Frame | (FFFE,E0DD) | 0000 0000H
4 bytes | 2 bytes | 036AH bytes | 4 bytes | 4 bytes | 0BC8H bytes | 4 bytes | 4 bytes

Table G.6-2. Example of Encoded YCbCr RLE Compressed Frame Item Value

Offset | Data | Description of Data |
0000 0000H | 0000 0003H | number of RLE Segments | (Header)
| 0000 0040H | location of RLE Segment 1 (Y component) |
| 0000 0140H | location of RLE Segment 2 (CB component) |
| 0000 01C0H | location of RLE Segment 3 (CR component) |
| 0000 0000H |  |
| ….. |  |
| ….. |  |
| 0000 0000H |  |
0000 0040H | Y - RLE Segment Data |  | (DATA)
0000 0140H | CB - RLE Segment Data |  | (DATA)
0000 01C0H | CR - RLE Segment Data |  | (DATA)

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DICOM PS3.5 2018a - Data Structures and Encoding