视频分量标准

1. 同步信号出现在哪个分量上

For consumer products, composite sync is present on only the Y channel. For pro-video applications, composite sync is present on all three channels.

2. 同步方式

Tri-level synchro

Bi-level synchro

3.分量国际标准间的基本区别:

* HD formats (Tri-level synchro)

• SMPTE274M / EIA-770.3 (1920 x 1080i) @ 60Hz

• SMPTE274M / EIA-770.3 (1920 x 1080i) @ 50Hz

• SMPTE295M / EIA-770.3 (1920 x 1080i) @ 50Hz

• SMPTE296M / EIA-770.3 (1280 x 720p) @ 60Hz

• SMPTE296M / EIA-770.3 (1280 x 720p) @ 50Hz

* HD formats (Bi-level synchro)

• AS4933 (1280 x 1152i) @ 50Hz

• AS4933 (1920 x 1080i) @ 50Hz

* SD progressive formats (ED) (Bi-level synchro)

• SMPTE293M / EIA-770.2 (720 x 480p) @ 59.94Hz

• ITU-R BT1358 / EIA 770.2 (720 x 576P) @ 50Hz

5. 中国的分量标准

SJ-T 11333-2006 数字电视接收设备接口规范 第7部分：YPBPR模拟分量视频信号接口

特点:

1. 其所规定可以支持的视频扫描格式

720X480i@60

720X576i@50

720X576p@50

1920X1080i@50(行频28.125)

1920X1080i@60

1280X720p@60

1280X1080i@50(行频31.25)

2. 同步只出现在Y信号上

3. 标清采用Bi-level synchro, 高清采用 Tri-level synchro