YUV9 yuv pixel format

Intel's web site states that YUV9 is "the color encoding scheme used in Indeo video technology. The YUV9 format stores information in 4x4 pixel blocks. Sixteen bytes of luminance are stored for every 1 byte of chrominance. For example, a 640x480 image will have 307,200 bytes of luminance and 19,200 bytes of chrominance." This sounds exactly the same as YVU9 to me. Anyone know if there is any difference?

Based on: YVU9