Erico Guizzo (1 March 2004). "CLOSING IN ON THE PERFECT CODE". IEEE Spectrum. Archived from the original on 23 April 2023. "Another advantage, perhaps the biggest of all, is that the LDPC patents have expired, so companies can use them without having to pay for intellectual-property rights."
Erico Guizzo (1 March 2004). "CLOSING IN ON THE PERFECT CODE". IEEE Spectrum. Archived from the original on 23 April 2023. "Another advantage, perhaps the biggest of all, is that the LDPC patents have expired, so companies can use them without having to pay for intellectual-property rights."