1、 Rec. ITU-R BT.1358-1 1 RECOMMENDATION ITU-R BT.1358-1 Studio parameters of 625 and 525 line progressive television systems (Question ITU-R 1/6) (1998-2007) Scope This Recommendation defines the signal parameters for 625 and 525 line progressive systems. Commonality with Recommendation ITU-R BT.601
2、signal parameters is maintained through some direct references. The ITU Radiocommunication Assembly, considering a) that progressive scan systems have been applied to enhanced analogue services and for digital television broadcasting; b) that the progressive signal offers improved vertical and tempo
3、ral resolution over the 525/625 line interlaced Standard Definition Television1(SDTV) signal; c) that parameter values for the progressive systems should have maximum commonality with the existing SDTV and High-Definition Television2(HDTV) systems; d) that progressive systems can be scaled up from S
4、DTV interlaced 625 and 525 line systems; e) that 625 and 525 line progressive systems can be scaled down from high-definition television systems which will embody internationally agreed unified colorimetric parameters; f) that the above two approaches could lead to systems with different parameters,
5、 for example colorimetry and synchronizing waveforms, recommends 1 that the following parameters derived from interlaced SDTV systems should be used for SDTV 625 and 525 line progressive television systems. 1SDTV in the context of this Recommendation is as defined by Recommendation ITU-R BT.601. 2HD
6、TV is as defined in Recommendation ITU-R BT.709. 2 Rec. ITU-R BT.1358-1 Annex 1 Signal parameter values for 625/50/P and 525/59.94/P SDTV progressive systems derived from interlaced SDTV 625 and 525 line standards 1 Opto-electronic conversion NOTE See Recommendation ITU-R BT.1361 Worldwide unified c
7、olorimetry and related characteristics of future television and imaging systems. 2 Picture and scanning characteristics Characteristics Item Parameter 625/50/P 525/59.94/P 1.1 Chromaticity coordinates, CIE 1931(1)See Recommendation ITU-R BT.601 3.6.1 1.2 See Recommendation ITU-R BT.601 3.6.2 Assumed
8、 chromaticity for equal primary signals - Reference white ER= EG= EB1.3 Opto-electronic transfer characteristics before non-linear precorrection See Recommendation ITU-R BT.601 3.6.3 1.4 Overall opto-electronic transfer characteristic at source See Recommendation ITU-R BT.601 3.6.4 (1)Chromaticity c
9、oordinates specified are those currently used by 625-line and 525-line interlaced SDTV systems. Characteristics Item Parameter 625/50/P 525/59.94/P 2.1 Order of scanning Left to right, top to bottom 2.2 Scanning format Progressive 2.3 Picture rate (Hz) 50 60/1.001 2.4 Total number of lines 625 525 2
10、.5 Active lines per picture 576 (lines 45 - 620) 483 (line 43 - 525) 2.6 Aspect ratio(1)16:9 (4:3) 2.7 Line frequency (Hz) 31 250 0.0001% 31 500/1.001 3 ppm (1)The aspect ratio for HDTV applications will normally be 16:9. It is possible that SDTV progressive systems will have an aspect ratio of 16:9
11、 or 4:3. Parameters for such systems are contained within standard parenthesis, i.e. (4:3). Rec. ITU-R BT.1358-1 3 3 Analogue representation The terms )or(),or(,RRBBCPCPYBGREEEEEEEE refer to gamma pre-corrected analogue signals. Levels are specified in millivolts measured across a matched 75 termina
12、tion. Characteristics Item Parameter 625/50/P 525/59.94/P 3.1 Primary signals nominal level, Standard colorimetry, :,BGREEE Reference black: 0%, 0 mV Reference peak level: 100%, 700 mV 3.2 Derivation of luminance component signal )1(YE BGRYEEEE += 0.1140.5870.299 3.3 Derivation of colour-difference
13、component signals )1(RBPPEE BGRYRPBGRYBPEEEEEEEEEEEERB=+=0.0810.4190.5001.4020.5000.3310.1691.7723.4 Component signals nominal level, Standard and extended colorimetry, Luminance :YE Colour difference :,RBPPEE Reference black: 0%, 0 mV Reference White: 100%, 700 mV No signal: 0%, 0 mV Maximum colour
14、 difference: 50%, 350 mV 3.5 Maximum signal bandwidth RBPPYBGREEEEEE,12 MHz 6 MHz 3.6 Form of synchronizing signal on primary and component signals(2)Bi-level bipolar (Fig. 1) 3.7 Horizontal sync timing reference OH (Fig. 1) 3.8 Sync level (mV) 300 7.5 mV 3.9 Inter-component timing accuracy 10 ns 3.
15、10 Horizontal sync and blanking interval signal timing Fig. 1 and Table 1 3.11 Vertical sync and blanking interval signal timing Fig. 2 and Tables 2 and 3 (1)The luminance and colour difference encoding equations used here are equivalent to those used in Recommendation ITU-R BT.601. (2)Addition of s
16、ynchronizing signal on R, B, PBand PRsignals is optional.4 Rec. ITU-R BT.1358-1 FIGURE 1 Analogue horizontal synchronizing pulse TABLE 1 Details of analogue horizontal synchronizing signals Symbol Characteristics 625/50/P 525/59.94/P H Nominal line period (s) 32 1001/31.5 (31.778) a Horizontal blank
17、ing interval (s) 6.0 1.5 5.35 + 0.15 0.1 b Interval between time datum, OH, and back edge of horizontal blanking pulse (s) 5.25 4.6 + 0.1 0.05 c Front porch (s) 0.75 0.15 0.75 0.05 d Synchronizing pulse (s) 2.35 0.1 2.35 0.05 e Build-up time (10 to 90%) of the edges of the horizontal blanking pulse
18、(s) 0.15 0.05 0.07 0.01 f Build-up time (10 to 90%) of the edges of the horizontal synchronizing pulses (s) 0.1 0.05 0.07 0.01 Rec. ITU-R BT.1358-1 5 FIGURE 2 Analogue vertical synchronizing pulses TABLE 2 Details of analogue vertical synchronizing signals Symbol Characteristics 625/50/P 525/59.94/P
19、 V Nominal frame period (ms) 20 1001/60 (16.683) D Vertical blanking interval 49H + a(1)42H + a(1) Build-up time (10 to 90%) of the edges of vertical blanking pulse (s) 0.15 0.05 0.07 0.01 A Interval between front edge of vertical blanking interval and front edge of first vertical synchronizing puls
20、e 5H(1)6H(1)C Interval between back edge of last vertical synchronizing pulse and back edge of vertical blanking interval 39H(1)30H(1)B Duration of sequence of vertical synchronizing pulses 5H(1)6H(1)p Duration of vertical synchronizing pulse (s) 29.65 0.1 29.428 0.05 r Interval between vertical syn
21、chronizing pulse (s) 2.35 0.1 2.35 0.05 s Build-up time (10 to 90%) of the vertical synchronizing pulses (s) 0.1 0.05 0.07 0.01 (1)For H and a, see Table 1. 6 Rec. ITU-R BT.1358-1 TABLE 3 Vertical blanking interval line numbers Line number 625/50/P 621 1 6 44 525/59.94/P 1 7 13 42 4 Digital represen
22、tation The terms R, G, B, Y, CB, CR, refer to quantized and digitally encoded signals. These signals are obtained from gamma pre-corrected signals. The digital representation in the following table follows Recommendation ITU-R BT.601 which defines the 4:2:2 and 4:4:4; family of 13.5 MHz sampled sign
23、als for 4:3 and for wide-screen 16:9 aspect ratio systems. Characteristics Item Parameter 625/50/1:1 525/59.94/1:1 4.1 Coded signal R, G, B, or Y, CB, CR4.2 Sampling lattice R, G, B, Y Orthogonal, line and picture repetitive 4.3 Sampling lattice CB, CR, Orthogonal, line and picture repetitive, co-si
24、ted with odd (1st, 3rd, 5th, etc.) Y active samples in each line 4.4 Sampling frequency R, G, B, Y Sampling frequency CB, CR, 27 MHz 3 ppm Half luminance sampling frequency 13.5 MHz 3 ppm 4.5 Number of samples per full line R, G, B, Y CB, CR864 432 858 429 4.6 Number of samples per active line R, G,
25、 B, Y CB, CR720 360 4.7 Coding format Linear, 8 or 10 bits/sample for each primary and component signal 4.8 Quantization:Primary signals R, G, B: See Recommendation ITU-R BT.601 3.5.3 4.9 Quantization:Component signal Y: Component signals CB, CR: See Recommendation ITU-R BT.601 3.5.3 4.10 Derivation
26、 of Y, CB, CR from quantized primary signals R, G, B:)See Recommendation ITU-R BT.601 3.5.4 4.11 Timing relationship between analogue sync reference, OH, and video data 132 samples at 27 MHz (Fig. 3) 122 samples at 27 MHz (Fig. 3) 4.12 Quantization level assignment: Video data: Timing references: 1.
27、00 through 254.75 0.00 to 0.75 and 255.00 to 255.75 4.13 Filter characteristics(1)R, G, B, Y CB, CRFig. 4 Fig. 5 (1)The filter templates are shown in Fig. 4 and Fig. 5 as a guideline. Rec. ITU-R BT.1358-1 7 1358-03717 718 719 720 721 730 731 732 733 862 863 0 1 2359 360 365 366 431 0 101359 360 365 366 491717 718 719 720 721 734 735 736 737 856 857 0 1 2359 360 367 368 428 0 101359 360 367 368 428OH525Digital line 1n16 T 122 TOH62512 T 132 TDigital line 1nFIGURE 3Timing relationship between analogue sync reference, , and video dataOH8 Rec. ITU-R BT.1358-1 Rec. ITU-R BT.1358-1 9
