BT1120的一些疑惑

没人回答啊，希望周一上班后，能有高手解答下！！！！

[quote]最后
        我输入的视频是720P_50，经过gv7601后输出BT1120数据，是YUV422格式的吧，能否用VI的YUV420采集？？？
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我以前调试过FPGA+3531,BT1120输入时可以VI接入的，并且VI支持YUV422的图像接入

BT1120是一种借口协议，YUV是视频信号格式，即色差信号（数字的）包含YUV444 YUV422 YUV420等，常见的是YUV422，编码一般是YUV420格式。
CEA861不清楚了，等待大神来科普

希望大家多多讨论啊，别让帖子沉下去了。。。。

帖子别沉下去了啊。。。。。

[quote][url=forum.php?mod=redirect&goto=findpost&pid=11224&ptid=5035]阿释密达沙加 发表于 2015-1-12 15:53[/url]
帖子别沉下去了啊。。。。。[/quote]

The CEA EDID Timing Extension was first introduced in EIA/CEA-861, and has since been updated several times, most notably with the −861B revision (which was version 3 of the extension, adding Short Video Descriptors and advanced audio capability/configuration information), −861D (published in July 2006 and containing updates to the audio segments), −861E, and −861F which was published on June 4, 2013.[9] According to Brian Markwalter, senior vice president, research and standards, CEA, −864F "includes a number of noteworthy enhancements, including support for several new Ultra HD and widescreen video formats and additional colorimetry schemes.”[10]

Version 1 (as defined in −861) allowed the specification of video timings only through the use of 18-byte Detailed Timing Descriptors (as detailed in EDID 1.3 data format above). In all cases, the "preferred" timing should be the first DTD listed in a CEA EDID Timing Extension.

Version 2 (as defined in −861A) added the capability to designate a number of DTDs as "native" and also included some "basic discovery" functionality for whether the display device contains support for "basic audio", YCbCr pixel formats, and underscan.

Per Version 3 (from the −861B spec), there are two different ways to specify the timings of available DTV[clarification needed] formats: via the use of 18-byte Detailed Timing Descriptors as in Version 1 & 2, and via the use of the Short Video Descriptor (see below). HDMI 1.0 -1.3c uses this[which?] version.

Included in Version 3 are four new optional types of data blocks: Video Data Blocks (containing the aforementioned Short Video Descriptors), Audio Data Blocks (containing Short Audio Descriptors), Speaker Allocation Data Blocks (containing information about the speaker configuration of the display device), and Vendor Specific Data Blocks (which can contain information specific to a given vendor's use).


From 维基百科。

这玩意居然还收费。 还是一种vedio 时序。 HDMI 1.0 -1.3 使用 861B时序 。上个preview版本。

[quote][url=forum.php?mod=redirect&goto=findpost&pid=11186&ptid=5035]goodman 发表于 2015-1-12 08:31[/url]
我以前调试过FPGA+3531,BT1120输入时可以VI接入的，并且VI支持YUV422的图像接入[/quote]

你好，采用VI输入时，海思的芯片如何来获取数据呢？

GV7601的同步设置为 嵌入式同步就可以了。

BT1120 标准时序下，数据就是yuv422格式， VI采集可以通过设置通道属性，选择按照YUV422采集还是YUV420采集，如果是YUV420，会做色度下采样。:)

终于能说上话了

[quote][url=forum.php?mod=redirect&goto=findpost&pid=24097&ptid=5035]hbmcjxd0000 发表于 2016-1-4 16:58[/url]
你好，采用VI输入时，海思的芯片如何来获取数据呢？[/quote]

海思 SDK 里面的 demo 有，你可以参考参考