Method for reducing data in a multi-channel data transmission
AssigneeRobert Bosch GmbH
InventorsBernd Edler, Hendrik Fuchs
Life of this patent
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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.
Claims8
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.
Dependencies are inferred from the claim text.