MINLAB: Minimum noise structure for ladder-based biorthogonal filter banks

In this paper, we introduce a minimum noise structure for ladder-based bior thogonal (MINLAB) filter bank. The minimum noise structure ensures that the quantization error has a unity noise gain, even though the filter bank is biorthogonal, The coder has a very low design and implementation cost. Perf ect reconstruction property is structurally preserved, Optimal bit allocati on and coding gain formulas are derived, We show that the coding gain of th e optimal MINLAB coder is always greater than or equal to unity, For both A R(1) process and MA(1) process, the MINLAB coder with two taps has a higher coding gain than the optimal orthonormal coder with an infinite number of taps, In addition to its superior decorrelation ability, it has many other desired features that make it a potentially valuable and attractive alterna tive to the orthonormal coder, especially for the high-fidelity compression .