DICOM PS3.3 2021c - Information Object Definitions

C.7.6.26 Real-Time Bulk Data Flow Module (Current)
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#### C.7.6.26 Real-Time Bulk Data Flow Module

This module references pixels/waveforms that are not contained within the DICOM data set but conveyed in the associated Flows, as described in Section 6.1 in PS3.22 .

Table C.7.6.26-1 specifies the Attributes for the Real-Time Bulk Data Flow Module.

Table C.7.6.26-1. Real-Time Bulk Data Flow Module Attributes

Attribute Name | Tag | Type | Attribute Description
--- | --- | --- | ---
Real-Time Bulk Data Flow Sequence | (0034,000A) | 1 | Identifies the Source and Flows of a SMPTE ST 2110 communication providing Bulk Data. At least one item shall be included in this sequence.
>Source Identifier | (0034,0005) | 1 | UUID of the Source of the Flow(s). See Section C.7.6.26.1.1.
>Flow Identifier Sequence | (0034,0001) | 1 | Identifies the Flow(s) provided by the Source. One or more items shall be included in this sequence.
>>Flow Identifier | (0034,0002) | 1 | UUID of the Flow. See Section C.7.6.26.1.2.
>>Flow Transfer Syntax UID | (0034,0003) | 1 | UID of the encoding method of the referenced Flow See Section C.7.6.26.1.3.
>>Flow RTP Sampling Rate | (0034,0004) | 1 | Sampling rate in Hertz used by RTP for generating timestamp See Section C.7.6.26.1.4.

In case the Source is producing different Flows of the same Essence (e.g., video with two different sampling rates), the sequence must include at least the audio or video Flow that is associated with the present RTV Flow, and may in addition include the other Flow(s), enabling the receiver to subscribe to another Flow.

##### C.7.6.26.1 Real-Time Bulk Data Flow Module Attributes

###### C.7.6.26.1.1 Source Identifier

The Source Identifier(0034,0005) is a Universally Unique Identifier (UUID). The value is 128 bits long encoded in binary. It shall correspond to the value of the Source Identifier of the related bulk data Flow which may contain this Source Identifier in the RTP Extended Header. In case such Source Identifier is not present in the related bulk data flow, this Source Identifier shall be set to enable multiple IODs to refer the same Source.

###### C.7.6.26.1.2 Flow Identifier

The Flow Identifier (0034,0002) is a Universally Unique Identifier (UUID). The value is 128 bits long encoded in binary. It shall correspond to the value of the Flow Identifier of the bulk data Flow which may contain this Flow Identifier in the RTP Extended Header. In case such Flow Identifier is not present in the related bulk data flow, this Flow Identifier shall be set to enable multiple IODs to refer the same Flow.

###### C.7.6.26.1.3 Flow Transfer Syntax UID

The Flow Transfer Syntax UID (0034,0003) shall be the one relative to the corresponding Flow. The sequence shall have at least one item in which the Flow Transfer Syntax UID and the Flow RTP Sampling Rate correspond to the Transfer Syntax UID (0002,0010) and RTV Flow RTP Sampling Rate (0002,0037), respectively, of the DICOM-RTV Meta Information Header.

###### C.7.6.26.1.4 Flow RTP Sampling Rate

The Flow RTP Sampling Rate (0034,0004) shall be the one defined in the SDP of the corresponding Flow.

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DICOM PS3.3 2021c - Information Object Definitions