DICOM PS3.5 2020b - Data Structures and Encoding

A.8 SMPTE ST 2110-20 Uncompressed Progressive Active Video Transfer Syntax (Current)
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## A.8 SMPTE ST 2110-20 Uncompressed Progressive Active Video Transfer Syntax

This Transfer Syntax is used in a DICOM-RTV Metadata Flow in order to describe the accompanying [SMPTE ST 2110-20] Video Flow.

DICOM Attributes

- Samples per Pixel (0028,0002)

- Photometric Interpretation (0028,0004)

- Bits Allocated (0028,0100)

- Bits Stored (0028,0101)

- High Bit (0028,0102)

are still applicable with some accommodations below.

As DICOM Photometric Interpretation (0028,0004) values YBR_FULL, YBR_FULL_422, YBR_PARTIAL_420 are based on CCIR 601 (aka BT.601), DICOM-RTV supports only the following:

- [SMPTE ST 2110-20] YCbCr-4:4:4 sampling system

- [SMPTE ST 2110-20] RGB sampling system

- [SMPTE ST 2110-20] YCbCr-4:2:2 sampling system

- [SMPTE ST 2110-20] YCbCr-4:2:0 sampling system

Table A.8-1 describes the different color resolution.

Table A.8-1. DICOM Attributes for different color resolution

Bit Depth | Samples per Pixel (0028,0002) | Bits Allocated (0028,0100) | Bits Stored (0028,0101) | High Bit (0028,0102)
--- | --- | --- | --- | ---
8 | 3 | 8 | 8 | 7
10 | 3 | 16 | 10 | 9
12 | 3 | 16 | 12 | 11
16 | 3 | 16 | 16 | 15

The way of encoding pixels shall respect SMPTE ST2110-20.

### Note

This encoding is different than the encoding of Pixel Data (7FE0,0010). Example, for YBR_FULL_422 10 bits:

- SMPTE ST 2110-20 Video Flow YCbCr 4:2:2 10 bits

     0                   1                   2                   3
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |   C'B00 (10 bits) |   Y'00 (10 bits)  |   C'R00 (10 bits) |   Y'01 (10 bits)  |
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

- DICOM Pixel Data (7FE0,0010) YBR_FULL_422 10 bits

     0                   1                   2                   3                   4                   5                   6
     0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 7 8 9 0 1 2 3
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+
    |   Y'00 (10 bits)  |0|0|0|0|0|0|    Y'01 (10 bits) |0|0|0|0|0|0|   C'B00 (10 bits) |0|0|0|0|0|0|   C'R00 (10 bits) |0|0|0|0|0|0|
    +-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+-+

A DICOM Transfer Syntax for SMPTE ST 2110-20 Uncompressed Progressive Active Video shall be identified by a UID value of

- 1.2.840.10008.1.2.7.1 corresponding to [SMPTE ST 2110-20] for the progressive video.

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DICOM PS3.5 2020b - Data Structures and Encoding