Originally Posted by AVfile
I have to ask, are there any more KNOWN fixes planned before we download this again?
We are always working on improving things. So, there is always this chance. However, yes, we are working on a release for this week.
This release is to improve the Chroma Burst pattern on the Spears and Muncil disc. It turns out there are two concerns with the patterns themselves. One is that they violate Nyquist sampling. This is a common thing in test patterns and so is not unexpected. However, do note that real video obeys Nyquist sampling criteria. So, these type of test patterns must be taken with a grain of salt.
The second issue is these patterns, when converted to RGB, create negative RGB values. These values would not be generated by real video, or even animated video, since they start in the RGB domain and values would be no less than zero.
We have always clamped RGB into the correct range, but Patrick added some new FPGA code to help with this particular exception to normal video.
We did find a Chroma filter in our FPGA code that was supposed to be off, that was actually still on. We will correct this setting as well. This change will show a small improvement in Chroma bandwidth since it eliminates the unnecessary filtering.