SMPTE RDD 18-2012 Acquisition Metadata Sets for Video Camera Parameters《摄相机参数用获取元数据集》.pdf

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1、 Copyright 2012 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 3 Barker Avenue, White Plains, NY 10601 (914) 761-1100 Approved March 14, 2012 re Acquisition Metadata Sets for Video Camera Parameters The attached document is a Proposed Registered Disclosure Document prepared by the propone

2、nt identified below. It has been examined by the appropriate SMPTE Technology Committee and is believed to contain adequate information to satisfy the objectives defined in the Scope, and to be technically consistent. This document is NOT a Standard, Recommended Practice or Engineering Guideline, an

3、d does NOT imply a finding or representation of the Society. Errors in this document should be reported to the proponent identified below, with a copy to engsmpte.org. All other inquiries in respect of this document, including inquiries as to intellectual property requirements that may be attached t

4、o use of the disclosed technology, should be addressed to the proponent identified below. Proponent contact information: Hiroshi Nakano Sony Corporation 4-14-1 Asahi-cho, Atsugi Kanagawa, 243-0014 Japan Email: Page 1 of 28 pages SMPTE RDD 18:2012 Revision of RDD 18:2010 SMPTE REGISTERED DISCLOSURE

5、DOCUMENT SMPTE RDD 18:2012 Page 2 of 28 pages Introduction This document defines metadata that is intended to capture camera acquisition parameters associated with each individual frame of the captured video. Such camera metadata can be used to provide user accessible information that enables optimi

6、zation of various parameters during acquisition. The metadata can also be stored or carried with the picture signal to form a record of the shooting parameters used in the shoot. The metadata values are created individually for the shoot to provide a dynamic record for each camera parameter. The met

7、adata in this document is composed of three distinct groups Lens Unit metadata, Camera Unit metadata and User Defined Acquisition metadata. The Lens Unit metadata provides a set of metadata items that define the lens parameter values during a shoot. Likewise, the Camera Unit metadata is a set of met

8、adata items that define the camera parameter values during a shoot. The User Defined Acquisition metadata may be defined by users. These three groups are coded as KLV coded metadata sets with each set containing individual metadata items. This document defines the KLV coded metadata sets and each KL

9、V coded metadata item in full for the purpose of interoperability. The final section provides guidance for the carriage of these KLV metadata sets through different transport mechanisms to allow the metadata sets to be successfully transported between applications using V-Anc packets on serial digit

10、al interfaces such as those complying with SMPTE ST 291 and in the essence containers of MXF files such as those complying with SMPTE ST 379-2. SMPTE RDD 18:2012 Page 3 of 28 pages Table of Contents 1 Scope . 42 Normative References . 43 Acronyms . 44 Definition of the Metadata Sets 54.1 Set Keys .

11、54.2 Set Length 54.3 Set Value 54.4 Extending the Acquisition Metadata Sets 124.5 Basic Set Rules 125 Acquisition Metadata Definitions 125.1 Common Distance Format . 125.2 Instance UID 135.3 Items of Lens Unit Metadata Set 135.4 Items of Camera Unit Metadata Set . 166 Carriage of the Acquisition Met

12、adata Sets . 256.1 Carriage in the MXF Generic Container . 256.2 Carriage in Vertical Ancillary Data Packets . 26Annex A Bibliography (Informative) . 28SMPTE RDD 18:2012 Page 4 of 28 pages 1 Scope This document describes metadata sets for the grouping of professional video camera acquisition paramet

13、ers with frame granularity. The metadata sets are coded using the SMPTE KLV coding protocol as defined by SMPTE ST 336. Coding the metadata sets as KLV packets is intended to ensure maximum acceptability across a wide range of application areas. 2 Normative References Note: All references in this do

14、cument to other SMPTE documents use the current numbering style (e.g. SMPTE ST 336:2007) although, during a transitional phase, the document as published (printed or PDF) may bear an older designation (such as SMPTE 336M-2007). Documents with the same root number (e.g. 336) and publication year (e.g

15、. 2007) are functionally identical. The following standards contain provisions which, through reference in this text, constitute provisions of this registered disclosure document. At the time of publication, the editions indicated were valid. All standards are subject to revision, and parties to agr

16、eements based on this registered disclosure document are encouraged to investigate the possibility of applying the most recent edition of the standards indicated below. SMPTE ST 336:2007, Data Encoding Protocol Using Key-Length-Value SMPTE ST 395:2003, Television Metadata Groups Registry Structure S

17、MPTE ST 400:2004, Television SMPTE Labels Structure SMPTE RP 210, Metadata Dictionary Registry of Metadata Element Descriptions SMPTE RP 224, SMPTE Labels Register IETF RFC 4122, A Universally Unique Identifier (UUID) URN Namespace 3 Acronyms Acronyms used in this document are listed below. BER: Bin

18、ary Encoding Rules ID: Identifier KLV: Key Length Value MXF: Material Exchange Format N/A: Not Applicable UID: Unique Identifier UL: Universal Label UUID: Universally Unique Identifier SMPTE RDD 18:2012 Page 5 of 28 pages 4 Definition of the Metadata Sets The Acquisition Metadata sets are KLV coded

19、according to SMPTE ST 336. All metadata item values in the sets described in this document are associated with a given frame of video and values may change on a frame-by-frame basis. There are three metadata sets; a Lens Unit Metadata set, a Camera Unit Metadata set and a User Defined Acquisition Me

20、tadata set. 4.1 Set Keys The set Key is as per Table 1. Table 1 The Acquisition Metadata Set Key Value Byte No. Description Value (hex) Meaning 14 SMPTE UL Identifier 06.0E.2B.34h See SMPTE ST 336 5 Category Designator 02h SMPTE Groups 6 Registry Designator 53h Local set with 2-byte Length and 2-byt

21、e Local Tag values 7 Structure Designator 01h Complies with register structure variant 1 8 Version Number vv (01h) Version of the register at set registration 9 Compound class 0Ch Identifies the Compound class in SMPTE ST 395 10 Production Metadata 02h Identifies metadata sets created at point of cr

22、eation or capture. 11 Acquisition Metadata 01h Identifies metadata sets associated with a video camera 12 Frame-based Acquisition Metadata 01h 01: Frame-based metadata set 13 Acquisition Set Kind yyh A non-zero value used to identify the specific camera acquisition set kind 01: Lens Unit Metadata se

23、t (Local set) 02: Camera Unit Metadata set (Local set) 03-7E: Reserved 7F: User Defined Acquisition Metadata14 1Acquisition Metadata Version 1 01h Backwards compatible version number of this Acquisition Metadata set 15 Null 00h Zero value 16 Null 00h Zero value 14.2 Set Length The User Defined Acqui

24、sition Metadata set kind may be used for private user defined (dark) metadata. The local tags and values for this set are assigned with tag value ranges from E0.00h to FF.FFh. If this set is inside MXF header metadata, local tags are allocated dynamically. The mapping of the sets inside MXF header m

25、etadata is beyond the scope of this document. The set Length field is BER encoded using long-form encoding as specified by SMPTE ST 336. The Length field is 4-bytes in length. 4.3 Set Value The contents of the Acquisition Metadata sets are as defined in Tables 2a and 2b. SMPTE RDD 18:2012 Page 6 of

26、28 pages All items in each set are encoded in the order shown in Tables 2a and 2b. The local tag values used in the metadata sets below are considered unique only within the confines of this specification. Any new items added to either of the sets described by Tables 2a and 2b should increment the l

27、ocal tag value within that set. No new items should be added to these sets without a revision of this document. 4.3.1 Lens Unit Metadata Set The Lens Unit Metadata set contents are as defined in Table 2a. Byte 13 of the set Key has the value of 01h. Table 2a Definition of the Lens Unit Metadata Set

28、Item Name Type Len Local Tag2Item UL Req ? Meaning Lens Unit Metadata Set Key (UL) 16 See Table 1 Req Lens Unit Metadata Set Key 06.0E.2B.34.02.53.01.01. 0C.02.01.01.01.01.00.00 Length BER Length 4 Req Set length Instance UID UUID 16 3C.0A 06.0E.2B.34 01.01.01.01 01.01.15.02 00.00.00.00 Opt Unique I

29、D of the instance of this data set defined in SMPTE RP 210 Iris F-Number UInt16 2 80.00 06.0E.2B.34 01.01.01.0D 04.20.02.02 01.00.00.00 Opt Iris position value calculated from the “F-number” that is a measure of the amount of light transmitted through the lens. Iris T-Number UInt16 2 80.08 06.0E.2B.

30、34 01.01.01.0E 04.20.02.02 08.00.00.00 Opt Iris position value calculated from the “T-number” that is a measure of the amount of light transmitted through the lens in practice Iris Ring Position UInt16 2 80.09 06.0E.2B.34 01.01.01.0E 04.20.02.02 09.00.00.00 Opt Iris ring rotation angle in unsigned i

31、nteger. 0 is for full open, and FFFFh for close Focus Position From Image Plane Half Float (lens serial) 2 80.01 06.0E.2B.34 01.01.01.0D 04.20.02.02 02.00.00.00 Opt Distance in meters between the image plane and the object in focus. Focus Position From Front Lens Vertex Half Float (lens serial) 2 80

32、.02 06.0E.2B.34 01.01.01.0D 04.20.02.02 03.00.00.00 Opt Distance in meters between the front of the lens and the object in focus. Focus Ring Position UInt16 2 80.0A 06.0E.2B.34 01.01.01.0E 04.20.02.02 0A.00.00.00 Opt Focus ring rotation angle in unsigned integer. 0 is for near-end, FFFFh for infinit

33、y SMPTE RDD 18:2012 Page 7 of 28 pages Item Name Type Len Local Tag2Item UL Req ? Meaning Macro Setting Boolean 1 80.03 06.0E.2B.34 01.01.01.0D 04.20.02.02 04.00.00.00 Opt Specifies by a flag, whether the macro is activate. TRUE: on FALSE: off Lens Zoom 35mm Still Camera Equivalent Half Float (lens

34、serial) 2 80.04 06.0E.2B.34 01.01.01.0D 04.20.02.02 05.00.00.00 Opt Focal length in meters Lens Zoom Actual Focal Length Half Float (lens serial) 2 80.05 06.0E.2B.34 01.01.01.0D 04.20.02.02 06.00.00.00 Opt Focal length in meters Zoom Ring Position UInt16 2 80.0B 06.0E.2B.34 01.01.01.0E 04.20.02.02 0

35、B.00.00.00 Opt Zooming ring rotation angle in unsigned integer. 0 is for wide-end, and FFFFh is for tele-end Optical Extender Magnification UInt16 2 80.06 06.0E.2B.34 01.01.01.0D 04.20.02.02 07.00.00.00 Opt Magnification factor setup of an optical extender or conversion lens where present Lens Attri

36、butes UTF8 String var 80.07 06.0E.2B.34 01.01.01.0D 03.02.03.02 02.10.01.00 Opt Informative description of additional attributes about the lens in use (as a text string). The string length is less than 64 bytes. 24.3.2 Camera Unit Metadata Set If this set is inside MXF header metadata, local tags ar

37、e allocated dynamically. The Camera Unit Metadata set contents are as defined in Table 2b. Byte 13 of the set Key has the value of 02h. Table 2b Definition of the Camera Unit Metadata Set Item Name Type Len Local Tag 3Item UL Req ? Meaning Camera Unit Metadata Set Key (UL) 16 See Table 1 Req Camera

38、Unit Metadata Set Key 06.0E.2B.34.02.53.01.01. 0C.02.01.01.02.01.00.00 Length BER Length 4 Req Set length Instance UID UUID 16 3C.0A 06.0E.2B.34 01.01.01.01 01.01.15.02. 00.00.00.00 Opt Unique ID of the instance of this data set defined in SMPTERP 210 SMPTE RDD 18:2012 Page 8 of 28 pages Item Name T

39、ype Len Local Tag 3Item UL Req ? Meaning Auto Exposure Mode Label 16 81.00 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.01.00.00 Opt Describes the setup mode the camera uses for automatic exposure. Each value is a SMPTE Label and registered in SMPTE RP 224 Exposure Index of Photo Meter UInt16 2 81.15 06.0

40、E.2B.34 01.01.01.0E 04.20.01.03 01.0C.00.00 Opt Setting of the photo meter in ISO number Auto Focus Sensing Area Setting UInt8 1 81.01 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.02.00.00 Opt Describes the selected areas used for the auto focus. Each value is a registered code. Color Correction Filter Wh

41、eel Setting UInt8 1 81.02 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.03.00.00 Opt Specifies the setting of the attenuation ratio of the built-in optical density (ND) filter. Each value is a registered code. Neutral Density Filter Wheel Setting UInt16 2 81.03 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.04.00.

42、00 Opt Describes the reciprocal of the attenuation ratio of the built-in optical density (ND) filter as an integer value where the value 1 means a clear filter. Image Sensor Dimension Effective Width UInt16 2 81.04 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.05.00.00 Opt Width of effective image area in

43、micro meters Image Sensor Dimension Effective Height UInt16 2 81.05 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.06.00.00 Opt Height of effective image area in micro meters Capture Frame Rate Rational 8 81.06 06.0E.2B.34 01.01.01.0D 04.01.03.01 03.01.00.00 Opt Capture Frame Rate in fps (e.g. 50:1, 60000:1

44、001). The rate at which the video is captured in frames per second. Image Sensor Readout Mode UInt8 1 81.07 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.07.00.00 Opt Image sensor Readout mode defined as a registered code. Shutter Speed (Angle) UInt32 4 81.08 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.08.00.00

45、 Opt Shutter speed as an angle defining the shutter speed (angle) in minutes relative to a completely open shutter angle of 360 degrees. Shutter Speed (Time) Rational 8 81.09 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.08.01.00 Opt Shutter speed as a time defining the shutter speed (time) in seconds. SMP

46、TE RDD 18:2012 Page 9 of 28 pages Item Name Type Len Local Tag 3Item UL Req ? Meaning Camera Master Gain Adjustment Int16 2 81.0A 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.09.00.00 Opt Master Gain Control setting in 0.01 decibel units ISO Sensitivity UInt16 2 81.0B 06.0E.2B.34 01.01.01.0D 04.20.01.03 0

47、1.0A.00.00 Opt Sensitivity to light in ISO exposure index Color Matrix Array of Rational 8 + 9x8 81.18 06.0E.2B.34 01.01.01.0E 04.20.01.03 01.0D.00.00 Opt Specifies the setting of the color balance of the camera with the ordered elements (R to R, G to R, B to R, R to G, G to G, B to G, R to B, G to

48、B, B to B) Electrical Extender Magnification UInt16 2 81.0C 06.0E.2B.34 01.01.01.0D 04.20.01.03 01.0B.00.00 Opt Expresses the magnification setup of the picture size in percent where 100% (64h) represents the original picture size Auto White Balance Mode UInt8 1 81.0D 06.0E.2B.34 01.01.01.0D 04.20.0

49、1.03 02.01.00.00 Opt Auto White Balance Mode defined as a registered code. White Balance UInt16 2 81.0E 06.0E.2B.34 01.01.01.0D 04.20.01.03 02.02.00.00 Opt White Balance value defined by the temperature in Kelvin Camera Master Black Level Int16 2 81.0F 06.0E.2B.34 01.01.01.0D 04.20.01.03 02.03.00.00 Opt Level of the master black level of the camera expressed as a percentage in relation to the white value. Defined in 0.1 % units. Camera Knee Point