Adaptive encoding of a digital signal with one or more missing values

摘要

A method of encoding samples in a digital signal is provided that includes receiving a plurality of samples of the digital signal, and encoding the plurality of samples, wherein an output number of bits is adapted for coding efficiency when a value in a range of possible distinct data values of the plurality of samples is not found in the plurality of samples.

主权项

1. A method of a digital signal processor for encoding samples in a digital signal, wherein the digital signal is a digital audio signal, the method comprising:
considering every value in a plurality of samples of the digital signal; and lossless encoding the plurality of samples via the signal processor; wherein an output number of bits is adapted for coding efficiency when a value in a range of possible distinct data values of the plurality of samples is missing in the plurality of samples and reducing a number of required bits based on the distinct data values; encoding an indicator that identifies the particular value that is missing from the range of possible distinct data values, an indicator identifying a data value set of the plurality of samples, and data related to the value in the range; and transmitting, to a receiver, the encoded plurality of samples and the encoded indicator that identifies the particular value that is missing from the range of possible distinct data values, the indicator identifying a data value set of the plurality of samples, and the data related to the value in the range, wherein the output number of bits is adapted by one of method 1 or method 2, wherein method 1 includes:
computing a possible data value range of the plurality of samples;computing an actual data value range of the plurality of samples by reducing the possible data value range by one for each value between a minimum sample value in the plurality of samples and a maximum sample value in the plurality of samples that is not found in the plurality of samples; andencoding the plurality of samples using the actual data value range, and wherein method 2 includes:computing a possible data value range of the plurality of samples;reducing the possible data value range by one when a predetermined value is not present in the plurality of samples to generate a reduced data value range; andencoding the plurality of samples using the reduced data value range.