I have an old Harmon Karman more than ten years and it did Dolby Digital, but not plus. There may be a way. I need to see more info on your 2005 model.
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Built-in Decoders
DTS 96/24, DTS Neo:6, DTS-ES Discrete 6.1, DTS-ES Matrix 6.1, Dolby Digital, Dolby Digital Surround EX, Dolby Pro Logic, Dolby Pro Logic II, Dolby Pro Logic IIx, THX Cinema, THX Surround EX decoder
Like was said it could be your TV integrated android is only PCM. Also check other setting on your TV maybe there is a way or via HDMI. Last resort call TV manufacturer.