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Graphics PC: Difference between revisions
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{{Equipment}} | |||
This is the machine used to render on-screen graphics which are then overlayed onto the live video output using a [http://www.overlaytools.com/coriogen-e.htm Coriogen Eclipse] genlock. This replaced the [[Commodore Amiga]] which had formerly performed the same function, but had become top unreliable and hard to use. | This is the machine used to render on-screen graphics which are then overlayed onto the live video output using a [http://www.overlaytools.com/coriogen-e.htm Coriogen Eclipse] genlock. This replaced the [[Commodore Amiga]] which had formerly performed the same function, but had become top unreliable and hard to use. | ||
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The main problem with the Coriogen genlock is that isn't as good as it's marketing claims. As a straight luma-keyed overlay unit it works fine, but the added features like fades in / out and automatic scan adjustment don't really work. When the hardware fades in and out there is a noticeable change in the brightness of the whole picture, and the automatic scan area adjustment has a habit of not making circles round on screen. For this reason an increasing range of software has been developed to keep all the graphics manipulation on the software side, with the genlock providing just a hardware interface from the computer to the vision chain. The down side of this is more software to look after, especially when it is custom written. | The main problem with the Coriogen genlock is that isn't as good as it's marketing claims. As a straight luma-keyed overlay unit it works fine, but the added features like fades in / out and automatic scan adjustment don't really work. When the hardware fades in and out there is a noticeable change in the brightness of the whole picture, and the automatic scan area adjustment has a habit of not making circles round on screen. For this reason an increasing range of software has been developed to keep all the graphics manipulation on the software side, with the genlock providing just a hardware interface from the computer to the vision chain. The down side of this is more software to look after, especially when it is custom written. | ||
{{unsure|It is possible this machine was still in this role in early 2011, when it suffered a major motherboard failure and was retired to the WEEE skip, to be replaced with what was originally known as the [[Edit PC]]}} | |||
[[Category: Equipment]] | [[Category: Equipment]] | ||