Method for reducing data in a multi-channel data transmission
First Claim
1. A method for reducing data in a data transmission of at least first and second channels, comprising the steps of:
- dividing the first channel into a plurality of first spectral components and dividing the second channel into a plurality of second spectral components, the first and second channels using common coding;
determining a statistical time-shifted cross-relation between at least one of the plurality of first spectral components and at least one of the plurality of second spectral components;
determining at least one predictor coefficient and a transmit-time difference between the at least one first spectral component and the at least one second spectral component based upon the cross-relation;
determining a prediction error, e(n), as a function of one of the at least one first spectral component and the at least one second spectral component;
transmitting the at least one first spectral component, the prediction error e(n), the at least one predictor coefficient, and the transmit-time difference to a receiver; and
reconstructing, at the receiver, the at least one second spectral component based upon the at least one first spectral component, the prediction error, the at least one predictor coefficient, and the transmit-time difference.
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Abstract
In a method for reducing data in a multi-channel data transmission, existing cross-relations between the signal channels are determined with due consideration of the transit-time difference. Upon the data transmission, a signal channel, the predictor coefficients and transit-time differences obtained from the cross-relations ascertained, and the prediction error are transmitted. At the receiver, the signal of the second channel is reconstructed from the transmitted signal channel, the predictor coefficients, the transit-time difference, and the prediction error. In this way, the amount of data to be transmitted in the case of multi-channel video or audio signals is reduced.
38 Citations
8 Claims
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1. A method for reducing data in a data transmission of at least first and second channels, comprising the steps of:
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dividing the first channel into a plurality of first spectral components and dividing the second channel into a plurality of second spectral components, the first and second channels using common coding; determining a statistical time-shifted cross-relation between at least one of the plurality of first spectral components and at least one of the plurality of second spectral components; determining at least one predictor coefficient and a transmit-time difference between the at least one first spectral component and the at least one second spectral component based upon the cross-relation; determining a prediction error, e(n), as a function of one of the at least one first spectral component and the at least one second spectral component; transmitting the at least one first spectral component, the prediction error e(n), the at least one predictor coefficient, and the transmit-time difference to a receiver; and reconstructing, at the receiver, the at least one second spectral component based upon the at least one first spectral component, the prediction error, the at least one predictor coefficient, and the transmit-time difference. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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Specification