SMPTE RP 219-2002 High-Definition Standard-Definition Compatible Color Bar Signal《高清晰度和标准清晰度兼容的彩条信号》.pdf
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1、RP 219-2002 SMPTE RECOMMENDED PRACTICE Hig h-Def inition, Standard-Definition Compatible Color Bar Signal Page 1 of 15 pages 1 Scope This practice specifies a color bar pattern compatible with both high- and standard-definition environments. The multi-format color bar signal is originated as an HDTV
2、 signal with an aspect ratio of 16:9 and may be down converted to an SDTV color bar signal with an aspect ratio of either 4:3 or 16:9. The color bar signal is generated with unconventionally slow rise and fall time value, and is therefore only intended to facilitate video level control and monitor c
3、olor adjustments (see note) of HDTV and SDTV equipment. It can be applied to HDTV video productions, especially in a multi-format environment where HDTV video sources are frequently converted and used as SDTV video content either in 525 or 625 environment with same frame frequencies as in the origin
4、al HDTV signal. NOTE - This signal should not be used to set luminance level or black or white color balance on monitors. The small size and off-center locations of the black and white bars are not suitable for this purpose, especially on CRT-based displays 2 Color bar signal structure The multi-for
5、mat color bar signal shall be composed of four specific patterns, shown in figure 1. Arrangement of patterns The first part of the color bar signal represents a signal for the 4x3 aspect ratio; a second part of the total signal adds additional side panels for the 16x9 aspect ratio. A third part adds
6、 black and white ramps and additional color information, and the last part completes the total signal by adding white and black bars, in addition to a set of near-black-level steps for monitor black level adjustment. Pattern 1 shall consist of a 75% color bar signal within a 4:3 aspect ratio area, w
7、ith 40% gray signals (see note 1) positioned on either side of the 4:3 area. (sub-pattern *1 in figure 1). Pattern 2 shall consist of the chroma setting signal (75% white) within the 4:3 area, with 100% cyan and 100% blue signals to the left and right sides respectively. Additionally, a signal in th
8、e sub-pattern area marked *2 in figure 1 shall be selectable from 75% white, 100% white, + I signal and -I signal options, according to the users operational preference (see note 4) The + I signal shall have the following component values: R = 41.2545 IRE, G= 16.6946 IRE and B= O IRE (see note 6) Th
9、e -I signal shall have the following component values: R = O IRE, G= 24.5600 IRE and B= 41.2545 IRE Copyright Q2002 by THE SOCIETY OF MOTION PICTURE AND TELEVISION ENGINEERS 595 W. Harisdale Ave., white Plains, NY 10607 (914) 761-llM) .Approved June 19,2002 RP 219-2002 Pattern 3 shall consist of a r
10、amp signal, with 100% yellow and 100% red signals to the left and right sides respectively. The ramp signal is designed for checking specific bit failures that may occur in digital processing. The ramp shall be a linear slope of luminance from 0% to 100% white. Additionally a signal in the sub-patte
11、rn area marked *3 in figure 1 shall be selectable from 0% black and +Q signal options, according to the users operational preference (see note 5). The + Q signal shall have the following component values: R = 25.3605 IRE, G= O IRE and B= 47.0286 IRE Pattern 4 shall consist ,of a 100% white signal, a
12、 0% black signal and a set of near-black signals for HDTV and SDTV monitor black level adjustment see note 31. The 15% gray signal panels are then added at each end of pattern 4 (see note 2). NOTES 1 The sub-pattern area marked 1 within pattern 1 in figure 1 (single bar on right and left of pattern
13、1) shall be set to 40% gray as a default value. This value can be optionally adjustable to any other value in accordance with the operational requirements of the user. 2 The sub-pattern area marked 4 within pattem 4 in figure 1 (single bar on right and left of pattern 4) shall be set to 15% gray as
14、a default value. This value can be optionally adjustable to any other value in accordance with the operational requirements of the user 3 These signals are known collectively as PLUGE (PLUGE: Picture Line Up Generating Equipment). For specific instruction see SMPTE EG 1, section 4.2 4 When the -I si
15、gnal is selected in sub-pattern *2, it is required that a +Q signal be simultaneously selected in sub- pattern 3. 5 When the +Q signal is selected in sub-pattern *3, it is required that a -I signal be simultaneously selected in sub- pattem 2. 6 For explanation of IRE see SMPTE 170M, annex B Page 2 o
16、f 15 pages U j m u m $ i c f: rn c jh ,-.“. n 0: RP 2142002 2.1 Rise and fall times of bar transitions It is required that implementers of this standard follow practices of proper shaping (rise and fall times for bar transitions) for individual bars. Nominal values for rise and fall time of the HDTV
17、 color bars shall be identical for luminance and PR / PB signals, and set to 55 mec. These rise and fall time definitions are based on a transition from 10% to 90%. The tolerance on the nse/fall times is set to 5 10% of the nominal value. The actual shape of the transition should be similar to integ
18、rated sine-squared pulse shape. The rise and fall times of the down converted SDTV color bar signal may follow the recommendation of either ITU R BT.801-1 or SMPTE 170M. 2.2 Waveforms NOTE - Values shown in figures 2 through 9 are associated with a 10-bit digital system; values shown in parentheses
19、are associated with an 8-bit digital system. 2.2.1 Pattern 1 Waveforms defining pattern 1 are shown in figure 2. Y PB PR R ! B i Gray i ! Figure 2 - Pattern 1 waveforms Page 4 of 15 pages RP 219-2002 2.2.2 Pattern 2 Waveforms defining pattern 2 are shown iri figures 3 through 6. (a) Sub-pattern *2 s
20、et to 75% white signal (16) Figure 3 - Pattern 2 waveforms with 75% white signal (in *2 sub-pattern) (b) Sub-pattern *2 set to 100% white signal: j cy i10oxw 75%W Figure 4 - Pattern 2 waveforms with 100% white signal (in *2 sub-pattern) Page 5 of 15 pages RP 219-2002 (c) Sub-pattern *2 set to +I sig
21、nal: CY i +I i 75%W :Bi . 72 1 Figure 5 - Pattern 2 waveforms with +I signal (in 2 sub-pattern) (d) Sub-pattern *2 set to - I signal: I 960 I PR Figure 6 - Pattern 2 waveforms with - I signal (in *2 sub-pattern) Page 6 of 15 pages RP 219-2002 2.2.3 Pattern 3 Waveforms defining pattern 3 are shown in
22、 figures 7 and . a) Sub-pattern *3 set to black signal: Y PB PR 512 Figure 7 - Pattern 3 waveforms with black signal (in 3 sub-pattern) Sub-pattern *3 set to +Q Y PB PR signal: Figure 8 - Pattern 3 waveforms with +Q signal (in *3 sub-pattern) Page 7 of 15 pages RP 21 9-2002 2.2.4 Pattern 4 Waveforms
23、 defining pattern 4 are shown in figure 9. (128) Figure 9 -Waveforms for pattern 4 3 Use of the color bar signal The multi-format color bar signal embodies a single signal constructed from the combination of a 100% color bar signal used in HDTV and a 75% color bar signal used in SDTV. Based on the d
24、ifference in aspect ratio between HDTV and SDTV, a 4:3 aspect ratio center section is utilized as a common area for both SDTV and HDTV signals, while the outside of this area is utilized for HDTV only. This color bar signal format therefore serves both HDTV and SDTV systems,. Additionally, it provid
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