Device and method for applying a look-up table
AssigneeInterDigital CE Patent Holdings, SAS
InventorsJurgen Stauder, Patrick Morvan, Anita Orhand
Life of this patent
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Abstract
A device applies a pre-function to an input signal to obtain an intermediate signal, wherein the pre-function has a linear section part of the input range. The device then applies a LUT including LUT entries that define a linear section and that delimit the range of the intermediate signal that corresponds to the part of the input range, resulting in an output signal that can be linearly processed through the pre-function and the LUT. The device can process a signal with positive and negative values, where one of these lies in the part of the input range that results in linear processing.
Claims20
A signal processing method comprising:
- applying a pre-function to an input signal to obtain an intermediate signal, the pre-function comprising a first part and a second part respectively corresponding to a first part and a second part of a range of the input signal, wherein the pre-function is linear in the second part;
- and
- applying a look-up table, LUT, to the intermediate signal to obtain an output signal, wherein the LUT corresponds to the pre-function and comprises a first part and a second part, wherein the second part is a linear part that comprises entries that delimit a range of the intermediate signal that corresponds to the second range of the input signal, and wherein the pre-function and the LUT are arranged so that the output signal is equal to the input signal for input signals in the second part.
A device comprising:
- memory configured to store processor-executable program code instructions;
- and
- at least one hardware processor configured to execute the program code instructions to:
- apply a pre-function to an input signal to obtain an intermediate signal, the pre-function comprising a first part and a second part respectively corresponding to a first part and a second part of a range of the input signal, wherein the pre-function is linear in the second part;
- and
- apply a look-up table, LUT, to the intermediate signal to obtain an output signal, wherein the LUT corresponds to the pre-function and comprises a first part and a second part, wherein the second part is a linear part that comprises entries that delimit a range of the intermediate signal that corresponds to the second range of the input signal, and wherein the pre-function and the LUT are arranged so that the output signal is equal to the input signal for input signals in the second part.
Dependencies are inferred from the claim text.