什么是scart接口
SCART(Syndicat des Constructeursd' Appareils Radiorcepteurs et Tlviseurs)接口是是一種專用的音視頻接口,它是由法國(guó)公司Peritel開(kāi)發(fā)的視聽(tīng)設(shè)備互聯(lián)工業(yè)標(biāo)準(zhǔn),也是歐洲強(qiáng)制要求用於衛(wèi)星電視接收機(jī)、電視機(jī)、錄影機(jī)及其它音視頻設(shè)備上的互連互通接口。標(biāo)準(zhǔn)的SCART接口為21針連接器,外型呈直角梯形,俗稱“掃把頭”。這21針中定義了音頻和視頻信號(hào),可用來(lái)傳輸CVBS和隔行RGB信號(hào)等視頻信號(hào),也可以傳送立體聲音頻信號(hào)。21針同時(shí)傳輸21個(gè)信號(hào),這21個(gè)信號(hào)可分為視頻信號(hào)、音頻信號(hào)、控制信號(hào)、地線和數(shù)據(jù)線幾種。此外,SCART接口還是雙向傳輸,實(shí)現(xiàn)所謂的“LOOP”循環(huán)功能。
scart接口定義
Pin No. Signal Inter Conne-ction Pin No.
1 Audio right channel output (0.5 Vrms, < 1K ohms) 2 2 Audio right channel input (0.5 Vrms, > 10K ohms) 1 3 Audio left channel output (0.5 Vrms, < 1K ohms) 6 4 Audio ground 4 5 Blue signal ground 5 6 Audio left channel input (0.5 Vrms, > 10K ohms) 3 7 Blue signal I/O (0.7 Vp-p, 75 ohms) 7 8 Function switching I/O (L: < 2V, H: > 10V, 10K ohms) 8 9 Green signal ground 9 10 Intercommunication data line No. 1 10 11 Green signal I/O (0.7 Vp-p, 75 ohms) 11 12 Intercommunication data line No. 2 12 13 Red signal ground 13 14 Blanking signal ground 14 15 Red signal I/O (0.7 Vp-p, 75 ohms) 15 16 Blanking signal I/O (L: < 0.4V, H: >1.0V, 75 ohms) 16 17 Composite video signal ground 18 18 Blanking signal ground 17 19 Composite video signal output (1 Vp-p, 75 ohms, sync: negative) 20 20 Composite video signal input (1 Vp-p, 75 ohms, sync: negative) 19 21 Plug shield (common ground) 21
scart接口圖
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