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ADV7393 数据表(PDF) 69 Page - Analog Devices |
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ADV7393 数据表(HTML) 69 Page - Analog Devices |
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69 / 96 page ![]() ADV7390/ADV7391/ADV7392/ADV7393 Rev. 0 | Page 69 of 96 APPENDIX 2–SD WIDE SCREEN SIGNALING Subaddress 0x99, Subaddress 0x9A, Subaddress 0x9B The ADV739x supports wide screen signaling (WSS) conforming to the ETSI 300 294 standard. WSS data is transmitted on Line 23. WSS data can only be transmitted when the device is configured in PAL mode. The WSS data is 14 bits long. The function of each of these bits is shown in Table 54. The WSS data is preceded by a run-in sequence and a start code (see Figure 100). The latter portion of Line 23 (after 42.5 μs from the falling edge of HSYNC) is available for the insertion of video. WSS data transmission on Line 23 can be enabled using Subaddress 0x99, Bit 7. It is possible to blank the WSS portion of Line 23 with Subaddress 0xA1, Bit 7. Table 54. Function of WSS Bits Bit Number Bit Description 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Setting 1 0 0 0 4:3, full format, N/A 0 0 0 1 14:9, letterbox, center 0 0 1 0 14:9, letterbox, top 1 0 1 1 16:9, letterbox, center 0 1 0 0 16:9, letterbox, top 1 1 0 1 >16:9, letterbox, center 1 1 1 0 14:9, full format, center Aspect Ratio, Format, Position 0 1 1 1 16:0, N/A, N/A 0 Camera mode Mode 1 Film mode 0 Normal PAL Color Encoding 1 Motion Adaptive ColorPlus 0 Not present Helper Signals 1 Present Reserved 0 0 No Teletext Subtitles 1 Yes 0 0 No 0 1 Subtitles in active image area 1 0 Subtitles out of active image area Open Subtitles 1 1 Reserved 0 No Surround Sound 1 Yes 0 No copyright asserted or unknown Copyright 1 Copyright asserted 0 Copying not restricted Copy Protection 1 Copying restricted ACTIVE VIDEO RUN-IN SEQUENCE START CODE 500mV 11.0µs 38.4µs 42.5µs W0 W1 W2 W3 W4 W5 W6 W7 W8 W9 W10 W11 W12 W13 Figure 100. WSS Waveform Diagram |
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