It seems that the HD radio format adopted in the US is indeed proprietary. In some other countries different formats are used, some of which are open standards: https://en.wikipedia.org/wiki/HD_Radio On Sun, May 28, 2017 at 8:41 AM, Mark Hanchey wrote: > I am interested in learning how HD radio works and is implemented in > consumer gear and I was able to find > information on the implementation but was wondering if anyone on the > list has done any work on the hardware side of things. > Are there specific IC that are used to receive the signal then a > separate codec chip or are there IC with all of it integrated ? > It seems to be a closed format , which I guess is one of the reasons > that it hasn't taken off as well as it could have. > > I found one IC by silabs that appears to receive it but the datasheet is > more of a sales sheet and it is one of those where you > have to contact sales for more information. The IC I found was the > SI4682 and seems to have all the main functions implemented but > without a datasheet hard to tell. > > Thanks > Mark Hanchey > > -- > http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive > View/change your membership options at > http://mailman.mit.edu/mailman/listinfo/piclist > --=20 http://www.piclist.com/techref/piclist PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist .