The　quality　of　audio　signals　that　have　been　encoded　with　low-bit　rate　audio　coding　standards　is　degraded　because　the　high　frequency　information　has　been　removed.　The　quality　of　such　audio　signals　can,　however,　be　improved　by　reconstructing　the　high　frequency　information　which　was　lost.　In　this　paper　the　principles　of　audio　signal　production　and　the　characteristics　of　the　human　hearing　system　have　been　used　to　develop　a　blind　high　frequency　reconstruction　method　based　on　chaotic　prediction　theory.　Performance　evaluation　with　objective　and　subjective　tests　has　shown　that　this　method　is,　in　most　cases,　more　efficient　than　other　blind　high　frequency　reconstruction　methods.