vadkudr
Advanced Member level 4
Dear colleagues,
Who knows background theory of G.726 codec related to adaptive predictor?
Can you describe (or link to) the theory answering to the questions:
1. How the structure of adaptive predictor was developed?
2. How coefficient adaptation rule was developed?
a1 (k) = (1 − 2^−8)a1 (k − 1) + (3 · 2^−8) sgn [p (k)] sgn [p (k − 1)]
a2 (k) = (1 − 2^−7)a2 (k − 1) + 2^−7 {sgn [p (k)] sgn [p (k − 2)]
− f [a1 (k − 1)] sgn [p (k)] sgn [p (k − 1)]}
bi (k) = (1 − 2^−9)bi (k − 1) + 2^−7 sgn [dq (k)] sgn [dq (k − i)].
Why these formulas are used?
Who knows background theory of G.726 codec related to adaptive predictor?
Can you describe (or link to) the theory answering to the questions:
1. How the structure of adaptive predictor was developed?
2. How coefficient adaptation rule was developed?
a1 (k) = (1 − 2^−8)a1 (k − 1) + (3 · 2^−8) sgn [p (k)] sgn [p (k − 1)]
a2 (k) = (1 − 2^−7)a2 (k − 1) + 2^−7 {sgn [p (k)] sgn [p (k − 2)]
− f [a1 (k − 1)] sgn [p (k)] sgn [p (k − 1)]}
bi (k) = (1 − 2^−9)bi (k − 1) + 2^−7 sgn [dq (k)] sgn [dq (k − i)].
Why these formulas are used?
