Method and apparatus for coding an information signal using delay contour adjustment
First Claim
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1. A method for coding an information signal comprising the steps of:
- a) dividing the information signal into blocks;
b) estimating the delay of the current and previous blocks of information;
c) forming a delay contour based on the delays of the current and previous blocks of information;
d) adjusting the shape of the delay contour at intervals of less than or equal to one block in length;
e) coding the shape of the adjusted delay contour to produce codes suitable for transmission to a destination.
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Abstract
An open-loop delay contour estimator (204) generates delay information during coding of an information signal. The delay contour is adjusted according to an error minimization criterion on a subframe basis, which allows a more precise estimate of the true delay contour. A delay contour reconstruction block (211) uses the delay information in a decoder in reconstructing the information signal.
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Citations
21 Claims
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1. A method for coding an information signal comprising the steps of:
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a) dividing the information signal into blocks; b) estimating the delay of the current and previous blocks of information; c) forming a delay contour based on the delays of the current and previous blocks of information; d) adjusting the shape of the delay contour at intervals of less than or equal to one block in length; e) coding the shape of the adjusted delay contour to produce codes suitable for transmission to a destination. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
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15. A system for coding an information signal, the system including an coder comprising:
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means for dividing the information signal into blocks; means for estimating the delay of the current and previous blocks of information and for forming a delay contour based on the delays of the current and previous blocks of information to adjust the shape of the delay contour at intervals of less than or equal to one block in length to produce delay information for transmission to a decoder. - View Dependent Claims (16, 17, 18, 19, 20, 21)
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Specification