Bandwidth　extension　of　audio　signals　artificially　restores　the　truncated　high-frequency　components　from　the　transmitted　wideband　signal　at　the　decoder　to　improve　the　auditory　quality　of　the　reproduced　audio　signals.　This　paper　describes　a　blind　bandwidth　extension　method　based　on　the　cochlear　filter　cepstral　coefficients.　The　system　emulates　auditory　peripheral　hearing　to　calculate　cochlear　filter　cepstral　coefficients　that　more　accurately　describe　the　spectral　information　of　the　wideband　audio.　The　Gaussian　mixture　model　is　used　to　estimate　the　spectral　envelope　of　high　frequencies.　Finally,　nearest　neighbor　mapping　used　to　recover　the　fine　structure　at　high　frequencies　is　combined　with　the　bandwidth　extension　of　wideband　audio　signals　to　give　superior　wideband　audio.　Objective　and　subjective　tests　both　indicate　that　the　method　achieves　better　performance　than　bandwidth　extension　methods　based　on　conventional　audio　features.