IEC 62875-2015 pdf Multimedia systems and equipment – Multimedia e-publishing and e-book technologies – Printing specification of texture map for auditory presentation of printed texts

1 Scope The texture map for auditory presentation of printed texts is printed on paper or shown on display devices. This International Standard specifies the printing quality of this texture map on paper. In order to ensure an interoperability of the texture map specified in IEC 62665, a printing specification based on the quality of this International Standard should be employed. 2 Normative reference The following documents, in whole or in part, are normatively referenced in this document and are indispensable for its application. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. IEC 62665, Multimedia systems and equipment – Multimedia e-publishing and e-books technologies – Texture map for auditory presentation of printed texts 3 Terms and definitions For the purposes of this document, the following terms and definitions apply. 3.1 texture map two dimensional cell patterns which include alignment lines and a data matrix [SOURCE: IEC 62665, 2.1 , modified – Definition has been clarified.] 3.2 data matrix two dimensional cell patterns generated from text data compression and error correction encoding 3.3 cell minimum square dot which constitutes a data matrix 3.4 alignment line border line which encloses a texture map Note 1 to entry: An alignment line consists of solid lines and tick marks. The solid lines have a cell’s width and may partially be interrupted. Note 2 to entry: For additional information on alignment lines, see IEC 62665.
4.3.2 Sampling line The values of quality measures a) through d) are defined by scanning cells on 1 0 sampling lines (5 horizontal and 5 vertical lines). A sampling line connects the corresponding tick marks on the opposite alignment lines, as shown in Figure 1 . For the size XS texture map, every tick mark is connected by a sampling line. For size S, M and L texture maps, every other tick mark is connected by a sampling line. The values of quality measures a) through d) are defined by scanning cells on 1 0 sampling lines (5 horizontal and 5 vertical lines). A sampling line connects the corresponding tick marks on the opposite alignment lines as shown in Figure 1 . For size XS texture map, every tick mark is connected by a sampling line. For size S, M and L texture maps, every other tick mark is connected by a sampling line.