final MiniDisc implementation did not use BRR] US Patent 5,041,830 [BRR shifting/quantization] US Patent 5,070,515 [BRR encoding/noise shaping; example coefficients can be seen on page 23] US Patent 5,086,475 [BRR Looping, pitch/frequency detection for encoding] US Patent 5,111,530 [Rather specific patent on the workings of the DSP in the SNES and PlayStation APU] US Patent 5,128,963 [a later patent on the system which became BRR] US Patent 5,166,981 [Using LPC analysis for assisting in encoding BRR] US Patent 5,303,374 [Predictive error generator for assisting in encoding BRR; coefficients can be seen on page 6] US Patent 5,430,241 [BRR Looping, pitch/frequency detection for encoding, similar to 5,086,475] US Patent 5,519,166 [BRR Looping, pitch/frequency detection for encoding, continuation of 5,430,241] US Patent 5,978,492 [BRR in the context of CD-XA on Sony PlayStation ] Digital audio Super Nintendo Entertainment System