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HDMI线的推出主要还是看兼容性吗

date:On February 06, 2018 Source:  

   HDMI线的出现众所皆知,日本东芝率先于2006年3月底推出下一代HDDVD光驱HD-XA1,HDMI端子的高画质展现是一大卖点。而个人计算机界直销的龙头Dell,也觊觎着这块消费性产品大饼,也是于2006年3月推出了24英寸宽银幕、WUXGA分辨率1920×1200、拥有HDCP著作权保护机制的液晶电视,并拥有色差输入以及D-DVI输入。可想而知,大家最关心的无疑是当HDDVD连接上这台高分辨率的液晶电视,是否能享受高画质的影像。当然这必须借用HDMI-DVI转换器或连接线,但连接以后的结果却是1080i的节目根本没有影像显现出来,必须通过遥控器的“分辨率切换”按键才能够看到影像。也就是说,似乎仅能看到480P或720P分辨率的输出,类似如此的细节性问题,对于一般的消费者来说,似乎显得比较沉重。

HDMI cable is well known, Japan Toshiba took the lead in the end of March 2006 to launch the next generation HDDVD drive HD-XA1, HDMI terminal high-quality display is a big selling point. Dell, the leader in the direct selling of the personal computer industry, is also emblazoned with this consumer product pie and introduced the 24-inch widescreen, WUXGA 1920 × 1200 LCD with HDCP copyright protection mechanism in March 2006 With color difference input and d-DVI input. One can imagine, everyone is most concerned about is undoubtedly when HDDVD connected to this high-resolution LCD TV, whether to enjoy high-quality images. Of course, you have to borrow the HDMI-DVI converter or cable, but after connecting the result is 1080i program no image appears, you must be able to see the image through the remote control "resolution switch" button. In other words, it seems that only the output of 480P or 720P resolution can be seen. Such a detailed problem seems to be quite heavy for the average consumer.

HDMI

   从此案例可以看出,为确保不同厂商产品间的沟通顺畅,HDMI兼容性测试(ComplianceTesting)肯定是HDMI发展中不可或缺的一环。兼容性测试已经有标准公布,然而随时要留心版本的更新。USB的兼容测试花了十年的功夫也不见得能够解决所有的兼容性问题,那么,HDMI当然也需要花一段时间来克服这个问题。

As can be seen from this case, in order to ensure smooth communication between different vendors' products, HDMI Compliance Test (ComplianceTesting) is definitely an indispensable part of HDMI development. Compatibility tests have been published, however, keep in mind the version of the update. USB compatibility test Spent a decade of effort is not necessarily able to solve all the compatibility issues, then, of course, HDMI also takes some time to overcome this problem.


   使用HDMI接口对于工程师而言肯定是毫无困难度,但对于普通消费者来说,是需要重新教育的一环,若想去硬性改变消费者的使用习惯,如果没有构思细想周全,要付出的代价是难以言喻的。因此,产业上存在一种头衔UserExperienceArchitect,其职责就是要想尽办法让使用者无痛苦的升级。

The use of HDMI interface for engineers is certainly no difficulty, but for ordinary consumers, is the need to re-education, if you want to rigidly change the habits of consumers, if there is no thoughtful thought to pay The price is unspeakable. Therefore, there is a title in the industry UserExperienceArchitect, its job is to find ways to make users painless upgrades.


   EIA/CEA-861B所定义的InfoFrames是学习HDMI技术必要的认知。一个InfoFrame打包仅仅能够载送一个InfoFrame。而且,依据HDMI的规范,其大小被限制在30个字节加上一个检验和(CheckSum)字节。

The message frame defined by EIA / CEA-861B is necessary to learn the HDMI technology. A message frame packing can only carry one message frame. Moreover, according to the specification of HDMI, its size is limited to 30 bytes plus a check sum (check) byte.


   在某些情况下,HDMI的源端会使用到AVIInfoFrame与AudioInfoFrame,而EIA/CEA-861B中所定义的其他InfoFrame,则是列为选项。想知道所有InfoFrame的细节,只有去翻阅CEA-861BSection6一种办法,因此,HDMI规格并不是一份完全独立的规范,必须还有其他的文献在手,交叉阅读与参考。而EIA/CEA-861B不仅定义了HDMI的影像格式、EDID以及InfoFrame的数据结构之外,还描述了音频的描述值与表格。这个现象与PCIExpress规范是一样的情形,必须同时准备PCI与PCI-X的规范,才能够彻底弄通。

In some cases, the source end of HDMI uses AVIInfoFrame and AudioInfoFrame, and other information frames defined in the EIA / CEA-861B are listed as options. Want to know all the details of the information frame, only to browse CEA-861BSection6 a way, therefore, HDMI specification is not a completely independent specification, there must be other literature in hand, cross-reading and reference. The EIA / CEA-861B not only defines the HDMI video format, EDID and information frame data structure, but also describes the description of the audio values and forms. This phenomenon is the same as the PCIExpress specification. It is necessary to prepare both the PCI and PCI-X specifications for thoroughness.


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