Signal frequency estimation is a problem of significance in many applications including audio signal processing.\nCompressed domain audio frequency estimators that directly use the modified discrete cosine transform (MDCT)\ncoefficients are suitable for low-complexity audio applications. A new frequency estimation approach, which can\nobtain the estimated value from a simple combination of three MDCT coefficients, is proposed herein. It exploits\nthe underlying relation among adjacent MDCT values and provides a general form of this type of estimators. The\nestimator manifests obvious computational advantages over other MDCT domain estimators and is suitable for high\nsignal-to-noise ratio (SNR) conditions.
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