Dolby Legality - diyAudio
Go Back   Home > Forums > Source & Line > Digital Line Level

Digital Line Level DACs, Digital Crossovers, Equalizers, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th October 2012, 04:55 AM   #1
diyAudio Member
 
Join Date: Jun 2009
Default Dolby Legality

Hi all,

I have a lot of interest where I live for a specific Dolby decoder. Basically I'm looking at using an IC like this one:

CS495xx Family : Multi-Standard 32-Bit Audio Decoder and Programmable DSPs

Question is, what's the legality of making a circuit with this IC? Do I need to get rights from Dolby etc? I don't necessarily need to slap the Dolby logo all over it, I will just need to make it clear that it'll be a decoder of digital audio.

Basically I don't want to release something and have Dolby (or a similar company) come and jump on me and fine me $50k or whatever for it!!!

Thanks!
  Reply With Quote
Old 24th October 2012, 05:34 AM   #2
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Noting that I am not a lawyer and probably have no clue about what I am talking about I'd assume that to purchase this part legally you need a license from Dolby to do so if it has hard coded Dolby functionality built in. If you can get the part and you intend to use it only for personal use I doubt it would be worth their trouble, however group buys or sales of devices using this chip probably require licensing beforehand. Dolby also has a reputation for fiercely protecting their IP, and this would include unauthorized use of their parts.

Why not contact directly Dolby and find out? Or ask the part vendor - in all likelihood legitimate vendors will require you to provide proof that you are licensed before you can purchase these parts.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 24th October 2012, 05:41 AM   #3
kevinkr is offline kevinkr  United States
diyAudio Moderator
 
kevinkr's Avatar
 
Join Date: Sep 2004
Location: Boston, Massachusetts
Blog Entries: 6
Actually I just looked at the part, it is one of a family of parts made by Cirrus Logic (Crystal Semi) for audio processing. It comes sans code, and since you will not be able to license the required DSP code from Dolby unless you have deep pockets and can meet the requirements for their certifications you will have neither the Dolby algorithm nor the need to use their name on anything.

Using composer you can probably come up with a reasonable surround decoder to implement in the DSP.

Note that this device is not recommended for new designs and is on the road to being phased out - it would probably be a good idea to pick another device from the family, it may have a successor.
__________________
"Extraordinary claims require extraordinary evidence." - Carl Sagan
  Reply With Quote
Old 24th October 2012, 09:44 AM   #4
diyAudio Member
 
Join Date: Jun 2009
Thanks for your help! Yeah, I figure there might be some tricky stuff about using it. I'll do as you suggested and have a chat to the supplier and/or Dolby about it anyway. Great idea! Thanks.

Quote:
Originally Posted by kevinkr View Post
Note that this device is not recommended for new designs and is on the road to being phased out - it would probably be a good idea to pick another device from the family, it may have a successor.
Ha, well this chip in particular isn't at all the one I'm going to use - I just Googled it and this was the first one that came up just so that I could show what I'm talking about.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Dolby 7.1 otto88 Digital Line Level 16 30th August 2008 08:12 AM
Dolby 2.0 DVD bilo Everything Else 0 7th December 2006 09:17 AM
Dolby from PC n0ne Digital Source 4 24th April 2004 07:31 AM
Dolby Digital..... bimbla Digital Source 3 31st March 2004 09:02 AM


New To Site? Need Help?

All times are GMT. The time now is 05:45 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2