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在Use-case中很难看出两者差别。参见deiLink_drv.c的DeiLink_drvCreateFvidObj()。两者的区别：在816X中，两者功能上几乎没有差别，而在814X和8107中，HDEI为non Dei mode，即在此模式下，不进行de-interlace，但可以控制帧率和缩放大小。
The DEI_H (High Quality De-interlacer) is primarily used to convert interlaced video source material to progressive
form. This particular module incorporates features such as Temporal Noise Reduction, 4 and 5 field motion detection and very fine edge detection capabilities to produce a very high quality deinterlaced output.
DEI
The DEI (De-interlacer) is primarily used to convert interlaced video source material to progressive form. This
particular module is a reduced feature set of the DEI_H module, in that in does not perform Temporal Noise
Reduction and is limited to 4 field motion detection. It performs edge directed interpolation, but utilizes a simpler
(and smaller) algorithm compared to the DEI_H module.
