ITU-R BT 801-1-1995 Test signals for digitally encoded colour television signals conforming with Recommendations ITU-R BT 601 and ITU-R BT 656《与ITU-R BT 601(Part A)和ITU-R BT 656一致的.pdf

1、 Rec. ITU-R BT.801-1 1 RECOMMENDATION ITU-R BT.801-1*Test signals for digitally encoded colour television signals conforming with Recommendations ITU-R BT.601 and ITU-R BT.656 (1992-1995) The ITU Radiocommunication Assembly, considering a) that digital television systems operate in very different wa

2、ys from analogue systems with the consequence that a quite different set of picture impairments may be introduced; b) that impairments may occur both from the conversions to and from the digital domain (which include filtering, sampling and quantization), and by degradations of the digital signal it

3、self (such as individual digit errors, timing jitter or loss of frame synchronization); c) that for measurements of such impairments it is necessary to provide the test signals, recommends 1 that for measurements of quantization errors and timing errors between analogue and digital active lines in c

4、onversion process from and to the digital signals conforming with Recommendation ITU-R BT.601, using 8-bit quantization, and for verifying the conformity of the multiplex format with Recommendation ITU-R BT.656, and checking for the correct operation of the associated interfaces, test signals used s

5、hould be selected from the list given in Table 1, rows No. 1 to 15; 2 that for the verification of cable equalizers and phase-locked loop (PLL) circuits the test signal of Table 1, row 16 should be used. The test signals are listed in Table 1 and its brief description and precise sample values are a

6、nnexed in Annexes 1 and 2, respectively. *Radiocommunication Study Group 6 made editorial amendments to this Recommendation in 2007 in acordance with Resolution ITU-R 44. 2 Rec. ITU-R BT.801-1 TABLE 1 List of test signals Annex 1 Brief description of test signals The formulae corresponding to the te

7、st signals are defined in 1, and the waveforms are illustrated in 2. 1 Formulae (see Note 1) In cases where sample values are derived by computation, an addition of 0.5 is included in the formula to ensure that the appropriate level is obtained by rounding the result. NOTE 1 Y, CR, CBsample numberin

8、g is in accordance with Recommendation ITU-R BT.656. These digital waveforms are made up of pulses in uniform ranges, ramps between two uniform ranges, and transitions between two uniform ranges, shaped by a filter whose impulse response R(t) is defined as a function of time t as follows: for 3T Not

9、e 1 The last sample in the first active line of the first field is 20.0h, or Y = A11. Note 2 The first half active field is defined as line 20 to (X 1) where 140 X 148 and 283 to (X 1) where 400 X 408 for 525 system and X is integer. Note 3 The first half active field is defined as line 23 to (X 1)

10、where 160 X 168 and 336 to (X 1) where 470 X 478 for 625 system and X is integer. A11, A12, A13, A14 and A15 in Table 2 describe the exact numerical definitions of “check field signals”.Rec. ITU-R BT.801-1 7 2 Waveforms of test signals Figures as follows indicate sample levels. 2.1 Grey: A1 16 16127

11、 127Active lineGreyD012.2 White: A2 2351616235Active lineWhiteD022.3 End-of-line pulses: A3 16 16235 235Active lineD032.4 Black/white ramp: A4 1616254Active lineD042.5 Yellow/grey and cyan/grey ramp: A5 128 128Active lineD058 Rec. ITU-R BT.801-1 2.6 Grey/blue and grey/red ramp: A6 235128 128Active l

12、ineD062.7 CB, Y, CR, Y ramp: A7 254 254254Active lineD072.8 White, end-of-line porches: A8 16 16235 235Active lineD082.9 Blue and red, end-of-line porches: A9 128240128240Active lineD092.10 Yellow and cyan, end-of-line porches: A10 1616128 128Active lineD10Rec. ITU-R BT.801-1 9 2.11 Check field test

13、 signals 2.11.1 Y for the first active line of the first field: A11 This waveform is used as the line 20 for 525 system and the line 23 for 625 system. 19216 1632192Active lineD112.11.2 Y for equalizer testing: A12 1921616192Active lineD122.11.3 Y for phase locked loop testing: A13 16128 12816Active

14、 lineD132.11.4 C for equalizer testing: A14 102128 128102Active lineD142.11.5 C for phase locked loop testing: A15 6812868128Active lineD1510 Rec. ITU-R BT.801-1 Annex 2 Sample values corresponding to test signal TABLE 2 Table of values used for defining digital test signals A1: Grey i 0 to 19 20 21

15、 22 23 24 25 to 693 694 695 696 697 698 699 to 719 A1(i) 16 18 33 72 110 125 127 125 110 72 33 18 16 A2: White i 0 to 19 20 21 22 23 24 25 to 693 694 695 696 697 698 699 to 719 A2(i) 16 19 50 126 201 232 235 232 201 126 50 19 16 A3: End-of-line pulses i 0 1 2 3 4 5 6 to 9 10 11 12 13 14 15 16 to 705

16、 706 707 A3(i) 16 44 154 235 154 44 16 17 64 185 229 121 31 16 17 64 i 708 709 710 711 712 713 714 715 716 717 718 719 A3(i) 185 229 121 31 16 16 44 154 235 154 44 16 A4: Black/white ramp i 0 to 20 21 22 23 24 to 59 60 to 87 88 to 99 100 to 535 536 to 549 550 to 585 A4(i) 16 14 9 3 1 (i 56) / 2) 16

17、(i 66) / 2) 235 (i 78) / 2) i 586 to 599 600 601 602 603 604 605 to 719 A4(i) 254 250 217 135 53 20 16 i: sample number and takes on values from 0 to 719. Rec. ITU-R BT.801-1 11 TABLE 2 (continued ) A5: Yellow/grey and cyan/grey ramp i 0 to 19 20 21 22 23 24 25 26 27 28 29 to 39 40 to 95 A5(i) 128 1

18、26 120 108 89 65 40 21 9 3 1 (i 32) / 4) i 96 to 119 120 to 563 564 to 719 A5(i) 16 (i 52) / 4) 128 A6: Grey/blue and grey/red ramp i 0 to 19 20 to 563 564 to 579 580 to 631 632 to 659 660 661 662 663 664 A6(i) 128 (i + 396) / 4) 240 (i + 384) / 4) 254 252 246 234 215 191 i 665 666 667 668 669 to 71

19、9 A6(i) 167 148 136 130 128 A7: CB, Y, CR, Y ramp i 0 to 253 254 to 507 508 to 761 762 to 1 015 1 016 to 1 269 1 270 to 1 439 A7(i) i + 1 508 i i 507 1 016 i i 1 015 1 524 i A8: White, end-of-line porches i 0 to 46 47 48 49 50 51 52 53 54 55 to 667 A8(i) 235 232 218 187 139 86 46 24 17 16 i 668 669

20、670 671 672 673 674 675 676 to 719 A8(i) 19 33 64 112 165 205 227 234 235 12 Rec. ITU-R BT.801-1 TABLE 2 (end ) A9: Blue and red, end-of-line porches i 0 to 23 24 25 26 27 to 333 334 335 336 337 338 to 359 A9(i) 240 232 191 143 128 130 152 204 236 240 A10: Yellow and cyan, end-of-line porches i 0 to

21、 23 24 25 26 27 to 333 334 335 336 337 338 to 359 A10(i) 16 24 65 113 128 126 104 52 20 16 A11: Y for the first active line of the first field i 0 to 718 719 A11(i) 192(C0.0h) 32(20.0h) A12: Y for equalizer testing i 0 to 719 A12(i) 192(C0.0h) A13: Y for phase locked loop testing i 0 to 719 A13(i) 1

22、28(80.0h) A14: C for equalizer testing i 0 to 359 A14(i) 102(66.0h) A15: C for phase locked loop testing i 0 to 359 A15(i) 68(44.0h) Rec. ITU-R BT.801-1 13 TABLE 3 Description of encoded colour-bar signals according to the 4:2:2 level of Recommendation ITU-R BT.601 a) Designation: 100/0/100/0 colour

23、 bars Definition of Y for digital active line with rise time = 150 ns i 0 to 13 14 15 16 17 18 19 to 99 100 101 102 103 104 105 to 185 Y(i) 16 16 39 126 212 235 235 235 232 223 213 210 210 i 186 187 188 189 190 191 to 271 272 273 274 275 276 277 to 357 358 Y(i) 210 206 190 174 170 170 169 167 157 14

24、7 145 145 144 i 359 360 361 362 363 to 443 444 445 446 447 448 449 to 529 530 531 Y(i) 141 126 110 107 106 106 104 94 84 82 81 81 77 i 532 533 534 535 to 615 616 617 618 619 620 621 to 719 Y(i) 61 45 41 41 41 38 28 19 16 16 Definition of CRfor digital active line with rise time = 300 ns i 0 to 5 6 7

25、 8 9 10 11 to 48 49 50 51 52 53 54 to 91 CR(i) 128 128 128 128 128 128 128 128 130 137 144 146 146 i 92 93 94 95 96 97 to 134 135 136 137 138 139 140 to 177 178 CR(i) 146 133 81 29 16 16 16 18 25 32 34 34 35 i 179 180 181 182 183 to 220 221 222 223 224 225 226 to 263 264 265 266 CR(i) 54 128 202 221

26、 222 222 224 231 238 240 240 240 227 175 i 267 268 269 to 306 307 308 309 310 311 312 to 359 CR(i) 123 110 110 110 112 119 126 128 128 i: sample number and takes on values from 0 to 719. 14 Rec. ITU-R BT.801-1 TABLE 3 (continued ) Definition of CBfor digital active line with rise time = 300 ns i 0 t

27、o 5 6 7 8 9 10 11 to 48 49 50 51 52 53 54 to 91 92 CB(i) 128 128 128 128 128 128 128 128 116 72 28 16 16 16 i 93 94 95 96 97 to 134 135 136 137 138 139 140 to 177 178 179 180 CB(i) 31 91 150 166 166 166 154 110 65 54 54 54 69 128 i 181 182 183 to 220 221 222 223 224 225 226 to 263 264 265 266 267 CB

28、(i) 187 202 202 202 191 146 102 90 90 90 106 165 225 i 268 269 to 306 307 308 309 310 311 312 to 359 CB(i) 240 240 240 228 184 140 128 128 b) Designation: 100/0/75/0 colour bars Definition of Y for digital active line with rise time = 150 ns i 0 to 13 14 15 16 17 18 19 to 99 100 101 102 103 104 105

29、to 185 Y(i) 16 16 39 126 212 235 235 235 227 198 169 162 162 i 186 187 188 189 190 191 to 271 272 273 274 275 276 277 to 357 358 Y(i) 161 158 146 134 131 131 131 129 122 114 112 112 112 i 359 360 361 362 363 to 443 444 445 446 447 448 449 to 529 530 Y(i) 109 98 87 84 84 84 82 74 67 65 65 65 i 531 53

30、2 533 534 535 to 615 616 617 618 619 620 621 to 719 Y(i) 62 50 38 35 35 35 33 25 18 16 16 Rec. ITU-R BT.801-1 15 TABLE 3 (end ) Definition of CRfor digital active line with rise time = 300 ns i 0 to 5 6 7 8 9 10 11 to 48 49 50 51 52 53 54 to 91 CR(i) 128 128 128 128 128 128 128 128 129 135 140 142 1

31、42 i 92 93 94 95 96 97 to 134 135 136 137 138 139 140 to 177 178 CR(i) 141 132 93 54 44 44 44 45 51 56 58 58 58 i 179 180 181 182 183 to 220 221 222 223 224 225 226 to 263 264 265 266 CR(i) 72 128 184 198 198 198 200 205 211 212 212 212 202 163 i 267 268 269 to 306 307 308 309 310 311 312 to 359 CR(

32、i) 124 115 114 114 116 121 127 128 128 Definition of CBfor digital active line with rise time = 300 ns i 0 to 5 6 7 8 9 10 11 to 48 49 50 51 52 53 54 to 91 CB(i) 128 128 128 128 128 128 128 128 119 86 53 44 44 i 92 93 94 95 96 97 to 134 135 136 137 138 139 140 to 177 178 CB(i) 44 56 100 145 156 156 156 148 114 81 73 72 73 i 179 180 181 182 183 to 220 221 222 223 224 225 226 to 263 264 265 CB(i) 84 128 172 183 184 183 175 142 108 100 100 100 111 i 266 267 268 269 to 306 307 308 309 310 311 312 to 359 CB(i) 156 200 212 212 212 203 170 137 128 128