1、 Reference numberISO/IEC TR 15938-8:2002(E)ISO/IEC 2002Information technology Multimedia content description interface Part 8: Extraction and use of MPEG-7 descriptions Technologies de linformation Interface de description du contenu multimdia Partie 8: Extraction et utilisation des descriptions MPE
2、G-7 National Standard of CanadaCAN/CSA-ISO/IEC TR 15938-8:04(ISO/IEC TR 15938-8:2002)Technical Report ISO/IEC TR 15938-8:2002 (first edition, 2002-12-15) has been adopted withoutmodification (IDT) as CSA Standard CAN/CSA-ISO/IEC TR 15938-8:04, which has been approved as aNational Standard of Canada
3、by the Standards Council of Canada.ISBN 1-55397-311-9 January 2004The Canadian Standards Association (CSA), The Standards Council of Canada is theunder whose auspices this National Standard has been coordinating body of the National Standards system, produced, was chartered in 1919 and accredited by
4、 a federation of independent, autonomousthe Standards Council of Canada to the National organizations working towards the furtherStandards system in 1973. It is a not-for-profit, development and improvement of voluntarynonstatutory, voluntary membership association standardization in the national in
5、terest.engaged in standards development and certification The principal objects of the Council are to foster activities. and promote voluntary standardization as a means CSA standards reflect a national consensus of of advancing the national economy, benefiting theproducers and users including manuf
6、acturers, health, safety, and welfare of the public, assisting consumers, retailers, unions and professional and protecting the consumer, facilitating domestic organizations, and governmental agencies. The and international trade, and furthering internationalstandards are used widely by industry and
7、 commerce cooperation in the field of standards.and often adopted by municipal, provincial, and A National Standard of Canada is a standard whichfederal governments in their regulations, particularly in has been approved by the Standards Council ofthe fields of health, safety, building and construct
8、ion, Canada and one which reflects a reasonableand the environment. agreement among the views of a number of capableIndividuals, companies, and associations across individuals whose collective interests provide to theCanada indicate their support for CSAs standards greatest practicable extent a bala
9、nce ofdevelopment by volunteering their time and skills to representation of producers, users, consumers, andCSA Committee work and supporting the Associations others with relevant interests, as may be appropriateobjectives through sustaining memberships. The more to the subject in hand. It normally
10、 is a standardthan 7000 committee volunteers and the 2000 which is capable of making a significant and timelysustaining memberships together form CSAs total contribution to the national interest.membership from which its Directors are chosen. Approval of a standard as a National Standard ofSustainin
11、g memberships represent a major source of Canada indicates that a standard conforms to theincome for CSAs standards development activities. criteria and procedures established by the StandardsThe Association offers certification and testing Council of Canada. Approval does not refer to theservices i
12、n support of and as an extension to its technical content of the standard; this remains thestandards development activities. To ensure the continuing responsibility of the accreditedintegrity of its certification process, the Association standards-development organization.regularly and continually a
13、udits and inspects products Those who have a need to apply standards arethat bear the CSA Mark. encouraged to use National Standards of CanadaIn addition to its head office and laboratory complex whenever practicable. These standards are subject in Toronto, CSA has regional branch offices in major t
14、o periodic review; therefore, users are cautioned centres across Canada and inspection and testing to obtain the latest edition from the organizationagencies in eight countries. Since 1919, the preparing the standard.Association has developed the necessary expertise to The responsibility for approvi
15、ng National Standards meet its corporate mission: CSA is an independent of Canada rests with theservice organization whose mission is to provide an Standards Council of Canadaopen and effective forum for activities facilitating the 270 Albert Street, Suite 200exchange of goods and services through t
16、he use of Ottawa, Ontario, K1P 6N7standards, certification and related services to meet Canadanational and international needs.For further information on CSA services, write toCanadian Standards Association5060 Spectrum Way, Suite 100Mississauga, Ontario, L4W 5N6CanadaAlthough the intended primary a
17、pplication of this Standard is stated in its Scope, it is importantto note that it remains the responsibility of the users to judge its suitability for their particular purpose.Registered trade-mark of Canadian Standards AssociationICS 35.040 Ref. No. ISO/IEC TR 15938-8:2002/Cor.1:2005(E) ISO/IEC 20
18、05 All rights reserved ISO/IEC TR 15938-8:2002 TECHNICAL CORRIGENDUM 1 Published 2005-10-01 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATIONINTERNATIONAL ELECTROTECHNICAL COMMISSION COMMISSION LECTROTECHNIQUE INTERNATIONALEInformation technology Multimedia
19、content description interface Part 8: Extraction and use of MPEG-7 descriptions TECHNICAL CORRIGENDUM 1 Technologies de linformation Interface de description du contenu multimdia Partie 8: Extraction et utilisation des descriptions MPEG-7 RECTIFICATIF TECHNIQUE 1 Technical Corrigendum 1 to ISO/IEC T
20、R 15938-8:2002 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. Technical Corrigendum 1:2006 toNational Standard of CanadaCAN/CSA-ISO/IEC TR 15938-8:04Technical Corrigendum 1:2005 to
21、Technical Report ISO/IEC TR 15938-8:2002 has been adopted withoutmodification (IDT) as Technical Corrigendum 1:2006 to CAN/CSA-ISO/IEC TR 15938-8:04. This TechnicalCorrigendum was reviewed by the CSA Technical Committee on Information Technology (TCIT) under thejurisdiction of the Strategic Steering
22、 Committee on Information Technology and deemed acceptable for use inCanada.December 2006ISO/IEC TR 15938-8:2002/Cor.1:2005(E) 2 ISO/IEC 2005 All rights reservedPage 266 Replace subclause 4.2.5.2.3 with the following: 4.2.5.2.3 Use of local representative colors (Visualization for Image Browsing) Th
23、e Color Layout descriptor is also useful to visualize image contents using a series of tiny picture icons for browsing since the descriptor values could be converted into small icons through the following two steps. The first step is coefficient decoding and the second one is inverse DCT transformat
24、ion. Both processes are the inverse operation as shown in the semantics of YDCCoeff, YACCoeff, CbDCCoeff, CbACCoeff, CrDCCoeff, and CrACCoeff in subclause 6.6.4 in ISO/IEC 15938-3. (1) Descriptor decoding This process consists of three sub processes. The first one is the interpolation of truncated c
25、oefficients. for(k=NumberOfYCoeff; k112) j=194+(i-112)*4; else if(i96) j=162+(i-96)*2; else if(i32) j=96+(i-32); else if(i16) j=66+(i-16)*2; else j=i*4; return j*8; int iquant_CbCr_DC(int i) int j; if(i63) j=192; else if(i56) j=162+(i-56)*4; else if(i48) j=145+(i-48)*2; else if(i16) j=112+(i-16); el
26、se if(i8) j=97+ (i-8)*2; else if(i0) j=66+ i*4; else j=64; return j*8; AC int iquant_Y_AC(int i) int j; i=i128) i= 128; if(i 96 ) j= (abs(i)*4 - 256 ; else if (abs(i) 64) j=(abs(i)*2 - 64 ; else j=abs(i); j = (i128) i= 128; if(i 96 ) j= (abs(i)*4 - 256 ; else if (abs(i) 64) j=(abs(i)*2 - 64 ; else j
27、=abs(i); j = (i Greater than= Greater than or equal toG74 Greater than or equal to Shift right with sign extension1.0descriptionUnitExample1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 The following example shows the use of root element for describing an image using Description.1.01.12001-09-20T03:20:25+09:00ISOI
28、nternational Organization of Standardization098f2470-bae0-11cd-b579-08002b30bfebcompleteDescriptionExampleCreatorYoshiakiShibatajpTokyo2000-10-10T19:45:00+09:00Wizzo Extracto ver. 2RID# ISO/IEC TR 15938-8:2002(E) ISO/IEC 2002 All rights reserved103.2.4 Top-level types3.2.4.1 Complete description typ
29、es3.2.4.1.1 Content description types examplesThe following example shows the use of the content description type ContentEntityType for describing aphotographic image depicting a sunset. The image description includes a text annotation and a description ofthe image color using ScalableColor D (defin
30、ed in ISO/IEC 15938-3).image.jpgSunset scene 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 The following example shows the use of the content description type SemanticDescriptionType fordescribing a car that is depicted in an image (image.jpg). The Semantic DS is defined in 3.10.3.3.Car Four wheel motorized vehic
31、leimage.jpg The following example shows the use of the content description type ModelDescriptionType fordescribing a collection model of “sunsets“ that contains two images depicting sunset scenes. TheCollectionModel DS is defined in 3.12.5.2.SunsetsISO/IEC TR 15938-8:2002(E) ISO/IEC 2002 All rights
32、reserved 11sunset1.jpgsunset2.jpgThe following example shows the use of the content description type SummaryDescriptionType fordescribing a hierarchical summary of video. The hierarchical summary has two levels: level 0 consists ofthree summary segments, and level 1 consists of one summary segment.
33、The HierarchicalSummary DSis defined in 3.11.2.3.file:/disk/video001.mpgThe following example shows the use of the content description type ViewDescriptionType fordescribing a spatial view of an image, which corresponds to the upper-right quarter of the image. TheSpaceView DS is defined in 3.11.3.5.
34、view.jpg ISO/IEC TR 15938-8:2002(E) ISO/IEC 2002 All rights reserved12image.jpg The following example shows the use of the content description type VariationDescriptionType fordescribing an image that is a variation of a video in which the image has been extracted from the video. TheVariationSet DS
35、is defined in 3.11.4.1.file:/video-A.mpgfile:/image-B.jpgextraction3.2.4.2 Content management types3.2.4.2.1 Content management types exampleThe following example shows the use of the content management type UserDescriptionType fordescribing the user preferences of a user of a multimedia system. The
36、 UserPreferences DS is defined in3.13.2.1.John Smith jrsmith ISO/IEC TR 15938-8:2002(E) ISO/IEC 2002 All rights reserved 13The following example shows the use of the content management type MediaDescriptionType fordescribing the media information of a news video. The MediaInformation DS is defined i
37、n 3.6.2.1.mpeg7_content:news1NaturalaudiovisualCDmpeg666478608MPEG-1 VideoThe following example shows the use of the content management type CreationDescriptionType fordescribing the creation information for a sports video. The CreationInformation DS is defined in3.7.2.1.Subway seriesGame among city
38、 rivalsISO/IEC TR 15938-8:2002(E) ISO/IEC 2002 All rights reserved14Sports ChannelThe following example shows the use of the content management type UsageDescriptionType fordescribing the usage information for a sport video released for the Internet. The UsageInforamtion DS isdefined in 3.8.2.1.nbc:
39、20010618:td2Internetus2001-06-16T21:00+01:00PT30MThe following example shows the use of the content management typeClassificationSchemeDescriptionType for describing a classification scheme for audio domain. TheClassificationScheme DS is defined in 3.5.4.1.1.0SourceType of audio sourceSyntheticNatur
40、alISO/IEC TR 15938-8:2002(E) ISO/IEC 2002 All rights reserved 153.2.4.3 Multimedia content entity description tools3.2.4.3.1 Multimedia content entity description tools examplesThe following example shows the use of the multimedia content entity ImageType for describing an image.image.jpgWorld Series Game 3 Game winning homerun Last inningGame winning homerun 1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6 The following example shows the use of the multimedia content entity VideoType for describing a video.Worldcup Soccer T00:00:00PT1M30S1 2 3 4 5 6 7 8 9 0 1 2 3 4 5 6
