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1、 ICS 35.040 Ref. No. ISO/IEC 15938-3:2002/Cor.1:2004(E) ISO/IEC 2004 All rights reserved Published in Switzerland INTERNATIONAL STANDARD ISO/IEC 15938-3:2002 TECHNICAL CORRIGENDUM 1 Published 2004-03-15 INTERNATIONAL ORGANIZATION FOR STANDARDIZATION ORGANISATION INTERNATIONALE DE NORMALISATION INTER
2、NATIONAL ELECTROTECHNICAL COMMISSION COMMISSION LECTROTECHNIQUE INTERNATIONALE Information technology Multimedia content description interface Part 3: Visual TECHNICAL CORRIGENDUM 1 Technologies de linformation Interface de description du contenu multimdia Partie 3: Visuel RECTIFICATIF TECHNIQUE 1 T
3、echnical Corrigendum 1 to ISO/IEC 15938-3:2002 was prepared by Joint Technical Committee ISO/IEC JTC 1, Information technology, Subcommittee SC 29, Coding of audio, picture, multimedia and hypermedia information. In 4.1, add the following subclause at the end: 4.1.1 Wrapper of the schema The syntax
4、of the description tools specified in this document assumes that a schema wrapper is provided, which identifies the XML Schema namespace (XML Schema) and MPEG-7 namespace: The following tag is used to close the schema: Copyright International Organization for Standardization Provided by IHS under li
5、cense with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/08/2007 08:41:34 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 15938-3:2002/Cor.1:2004(E) 2 ISO/IEC 2004 All rights reserved In 5.2.4, section “DescriptorID“, replace: The assig
6、nment of IDs to the descriptors is specified in Table 1. with: The assignment of IDs to the descriptor is specified in Table 1. The possible value of DescriptorID for GridLayout is one of 2, 4, 6, 7, 8, 12, 19, 21, and 26. In 5.2.4, replace: numOfPartX This attribute specifies the number of horizont
7、al partitions in the grid over the image. numOfPartY This attribute specifies the number of vertical partitions in the grid over the image. with: numOfPartX This attribute specifies the number of horizontal partitions in the grid over the image. The value of “0” is forbidden for this attribute. numO
8、fPartY This attribute specifies the number of vertical partitions in the grid over the image. The value of “0” is forbidden for this attribute. In 5.3.3.4 and 5.3.4.4, add the following sentence at the end of “DescriptorID“ semantics: The following values of DescriptorID are allowed: 2, 4, 6, 7, 8,
9、9, 12, 19, 21, and 26. In 5.3.3.4 and 5.3.4.4, add the following sentence at the end of “Descriptor“ semantics: The descriptor specified in this field is extracted from the frame corresponding to the start of the corresponding time interval. In 6.2.3, replace: ColorTransMatjk 16 uimsbf with: ColorTr
10、ansMatjk 16 simsbf In 6.5, replace all instances of “histogram”, “color histogram” and “HSV color histogram” with “normalized histogram”, “normalized color histogram” and “normalized HSV color histogram” respectively. In 6.5.4, add the following sentence at the end of first paragraph of section “Bit
11、 representation of Coefficients”: If, in the encoding process, the absolute value of the difference between amplitude and offset exceeds the maximum that can be represented using the assigned number of bits BN, the value is clipped to the maximum representable value. Copyright International Organiza
12、tion for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/08/2007 08:41:34 MDTNo reproduction or networking permitted without license from IHS -,-,- ISO/IEC 15938-3:2002/Cor.1:2004(E) ISO/IEC 2004 All rights reserved 3 In
13、6.5.4, section “Bit representation of Coefficients”, replace: The input to the transform is an HSV Color Histogram based on the definition of the uniform ColorQuantization descriptor with 16 bins in H, and 4 bins in each S and V (256 bins in total). with: The input to the transform is a normalized H
14、SV Color Histogram based on the definition of the uniform ColorQuantization descriptor with 16 bins in H, and 4 bins in each S and V (256 bins in total). The normalization means that after determination of the HSV Color Histogram each histogram entry has to be divided by the total number of pixels i
15、n the image. Then each normalized histogram entry has a value within the interval 0,1. Those values are subsequently uniformly quantized to 11 bits using nearest neighbour quantization. In 6.5.4, section “Bit representation of Coefficients”, remove “ (probability) ” from the third sentence after Tab
16、le 15. In 6.6.4, replace: The DCT coefficients of each color component are derived from the corresponding component of local representative colors. The selection algorithm of local representative colors is not normative. with: The DCT coefficients of each color component are derived from the corresp
17、onding component of resized picture, whose size is 8x8, from picture data. The original picture data should be divided into 64 (8x8) blocks and representative color of each block corresponds to each element of the resized picture. The selection algorithm of representative color is informative and a
18、typical one is recommended in ISO/IEC 15938-8. In 6.6.4, replace: The 8x8 DCT coefficient matrix, c88, can be calculated from the 8x8 matrix of local representative colors, d88, as follows with: The 8x8 DCT coefficient matrix, c88, can be calculated from the resized picture d88, as follows In 6.6.4,
19、 replace: It should be noted that the invalid locations in d88 should be padded before the above process is performed using the average color of all valid representative colors. with: To apply this tool to arbitrary shaped region, the representative colors of the blocks which have no pixels inside t
20、he region should be padded with the mean value of the valid pixel of the resized picture. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/08/2007 08:41:34 MDTNo reproduction or net
21、working permitted without license from IHS -,-,- ISO/IEC 15938-3:2002/Cor.1:2004(E) 4 ISO/IEC 2004 All rights reserved In 7.2.1, replace Eq. 4 with: + = = 1 0 360 )0( 2 , ),(),( ? ? PGp rsPi 4 and Eq. 6 with: ()() + = = 1 0 360 )0( 2 2 , , ? ? iPi pPGq rs 6 In Table 38, 8.2.4, replace: ArtDE Reconst
22、ruction value with: MagnitudeOfART Reconstruction value In 8.3.2, replace the definition of element Peak with: In 9.3.4, add the following sentence at the end of semantics of CoordCoodingLength: This field can only be set to one if the value of the attribute units is “00”, i.e. both horizontal and v
23、ertical coordinates are normalized by image size in the respective dimension. In 9.5.4, replace the first sentence of SpaLocNumber semantics with: This field, which is only present in the binary representation, specifies the number of spatially localized activity parameters and the associated grid divisions of the video frames. Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=IHS Employees/1111111001, User=Wing, Bernie Not for Resale, 05/08/2007 08:41:34 MDTNo reproduction or networking permitted without license from IHS -,-,-