SAMPLES 544 SAMPLES 176 SAMPLES 768 SAMPLES (0-103) (104-647) (0-175) (176-943) TOTAL LINE TOTAL LINE 648 SAMPLES 944 SAMPLES (0-647) (0-943) Figure 7.3-19 576i Analog-Digital Relationship (4:3 Aspect Ratio, Figure 7.3-18 576i Analog-Digital Relationship (4:3 Aspect Ratio, 25 Hz Frame Rate, 10.125 MHz Sample Clock). 25 Hz Frame Rate, 14.75 MHz Sample Clock). 1024 X 576p is a 16:9 square pixel format, while 768 X 1024 X 576p 39.33 MHz 50 Hz 576p is a 4:3 square pixel format. The 704 X 576p format 768 X 576p 29.50 MHz 50 Hz is done by using the 720 X 576p format, and blanking the first eight and last eight samples each active scan line. 704 X 576p 27.00 MHz 50 Hz Example relationships between the analog and digital 544 X 576p 20.25 MHz 50 Hz signals are shown in Figures 7.3-21 through 7.3-24. The H (horizontal blanking), V (vertical blanking), 480 X 576p 18.00 MHz 50 Hz and F (field) signals are defined in Figure 7.3-25. The H, LINE 1 LINE (V 1) BLANKING LINE 23 (V 0) FIELD 1 (F 0) FIELD 1 NUMBER ACTIVE VIDEO 23-310 311-312 LINE 311 (V 1) 313-335 LINE 313 336-623 BLANKING 624-625 LINE 336 (V 0) FIELD 2 (F 1) FIELD 2 ACTIVE VIDEO LINE 624 (V 1) BLANKING LINE 625 LINE 625 (V 1) Figure 7.3-20 576i Digital Vertical Timing (576 Active Lines). F and V change state at the EAV sequence at the beginning of the digital line. Note that the digital line number changes state prior to the start of horizontal sync, as shown in Figures 7.3-16 through 7.3-19. IEC 61834-2, ITU-R .1618, and SMPTE 314M (DV formats) specify lines 23-310 and 335-622 for active video. CHAPTER 7.3 Video signals overview SAMPLE RATE = 27.0 MHZ SAMPLE RATE = 29.5 MHZ 12 SAMPLES 13 SAMPLES DIGITAL DIGITAL BLANKING DIGITAL ACTIVE LINE BLANKING DIGITAL ACTIVE LINE 144 SAMPLES 720 SAMPLES 176 SAMPLES 768 SAMPLES (0-143) (144-863) (0-175) (176-943) TOTAL LINE TOTAL LINE 864 SAMPLES 944 SAMPLES (0-863) (0-943) Figure 7.3-21 576p Analog-Digital Relationship (4:3 Aspect Figure 7.3-23 576p Analog-Digital Relationship (4:3 Aspect Ratio, 50 Hz Frame Rate, 27 MHz Sampl