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ADV7341 Fiches technique(PDF) 80 Page - Analog Devices |
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ADV7341 Fiches technique(HTML) 80 Page - Analog Devices |
80 / 108 page ADV7340/ADV7341 Data Sheet Rev. C | Page 80 of 108 SD WIDE SCREEN SIGNALING Subaddress 0x99, Subaddress 0x9A, Subaddress 0x9B The ADV7340/ADV7341 support wide screen signaling (WSS) conforming to the ETSI 300 294 standard. WSS data is trans- mitted on Line 23. WSS data can be transmitted only 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 60. The WSS data is preceded by a run-in sequence and a start code (see Figure 97). 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 60. Function of WSS Bit Number Bit Description 13 12 11 10 9 8 7 6 5 4 3 2 1 0 Setting Aspect Ratio, Format, Position 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 0 1 1 1 16:0, N/A, N/A Mode 0 Camera mode 1 Film mode Color Encoding 0 Normal PAL 1 Motion Adaptive ColorPlus Helper Signals 0 Not present 1 Present Reserved 0 N/A Teletext Subtitles 0 No 1 Yes Open Subtitles 0 0 No 0 1 Subtitles in active image area 1 0 Subtitles out of active image area 1 1 Reserved Surround Sound 0 No 1 Yes Copyright 0 No copyright asserted or unknown 1 Copyright asserted Copy Protection 0 Copying not restricted 1 Copying restricted Figure 97. WSS Waveform Diagram 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 |
Numéro de pièce similaire - ADV7341_15 |
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Description similaire - ADV7341_15 |
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