Company Logos

[tricky]

I need some help finding some company logos. I've compiled a spreadsheet of all my BDs, HD DVR Titles,and DVDs that I update monthly; making it easier to find films I want to watch. I keep them in sheet jackets in a black binder, but I really want to make a cover for it using logos that describe my hardware and software such as Blu-ray, THX, etc. It can bee seen here: https://www.blu-ray.com/community/ga...?member=tricky The problem I'm having is that many of the logos are meant to only have a black or white background. I want to change the properties of the background to be translucent, but many of the images I'm finding have speckled multi-toned backgrounds; making it impossible to have a background image other than black. I have found some, but am looking for the following:

Blu-ray
Dish Network
Western Digital
DTS-HD Master Audio
Digital DTS Surround
Dolby Digital

Please help if you can. Thanks!