background image
ISO/IEC 10918-1 : 1993(E)
A
1
A
A
2
n
X
Y
1
2
n
X
Y
1
2
n
X
Y
B
B
B
C
C
C
TISO0760-93/d012
A , A , ....A ,
1 2
n
B , B , ....B ,
C , C , ....C
1
2
n
1
2
n
Scan 1
Scan 2
Scan 3
Data unit encoding order, non-interleaved
A , B , C , A , B , C , ....A , B , C
2
1
1
1
2
2
n
n
n
Scan 1
Data unit encoding order, interleaved
Figure 12 Interleaved versus non-interleaved encoding order
FIGURE 12 [D12] 9,5 cm = 371 %
These control procedures are also able to handle cases in which the source image components have different dimensions.
Figure 13 shows a case in which two of the components, B and C, have half the number of horizontal samples relative to
component A. In this case, two data units from A are interleaved with one each from B and C. Cases in which components
of an image have more complex relationships, such as different horizontal and vertical dimensions, can be handled as
well. (See Annex A.)
A
1
A
A
2
n
X
Y
1
2
Y
B
B
n/2
B
1
2
Y
n/2
C
C
C
TISO0770-93/d013
X/2
X/2
A , A , B , C , A , A , B , C , ....A , A , B , C
2
3
4
n-1
n
1
2
1
1
2
n/2
n/2
Scan 1
Data unit encoding order, interleaved
Figure 13 Interleaved order for components with different dimensions
FIGURE 13 [D13] 8 cm = 313 %
20
CCITT Rec. T.81 (1992 E)
[1] [2] [3] [4] [5] [6] [7] [8] [9] [10] [11] [12] [13] [14] [15] [16] [17] [18] [19] [20] [21] [22] [23] [24] [25] [26] [27] [28] [29] [30] [31] [32] [33] [34] [35] [36] [37] [38] [39] [40] [41] [42] [43] [44] [45] [46] [47] [48] [49] [50] [51] [52] [53] [54] [55] [56] [57] [58] [59] [60] [61] [62] [63] [64] [65] [66] [67] [68] [69] [70] [71] [72] [73] [74] [75] [76] [77] [78] [79] [80] [81] [82] [83] [84] [85] [86] [87] [88] [89] [90] [91] [92] [93] [94] [95] [96] [97] [98] [99] [100] [101] [102] [103] [104] [105] [106] [107] [108] [109] [110] [111] [112] [113] [114] [115] [116] [117] [118] [119] [120] [121] [122] [123] [124] [125] [126] [127] [128] [129] [130] [131] [132] [133] [134] [135] [136] [137] [138] [139] [140] [141] [142] [143] [144] [145] [146] [147] [148] [149] [150] [151] [152] [153] [154] [155] [156] [157] [158] [159] [160] [161] [162] [163] [164] [165] [166] [167] [168] [169] [170] [171] [172] [173] [174] [175] [176] [177] [178] [179] [180] [181] [182] [183] [184] [185] [186]