Below you can find logos, similar to the Dolby digital .

Dolby Surround Pro Logic Dolby Surround Pro Logic vector
CD DIGITAL AUDIO CD DIGITAL AUDIO  vector
DST - Digital Systems & Technologies DST - Digital Systems & Technologies vector
Dolby Digital Surround EX Dolby Digital Surround EX vector
Dolby B C NR Dolby B C NR vector
Dolby Laboratories Dolby Laboratories vector
Magia Digital Magia Digital vector
DSI Digital Software International DSI Digital Software International vector
192K Digital 192K Digital vector
Dolby Digital Pro Logic II Dolby Digital Pro Logic II vector
Dolby Surround Pro Logic II Dolby Surround Pro Logic II vector
DIGITAL IGUANA DIGITAL IGUANA vector
Sofia Digital Sofia Digital vector
Dolby Virtual Surround Dolby Virtual Surround vector
Annex Digital Annex Digital vector