Appending pseudo-random sub-LSB values to prevent intensity banding
AssigneeTektronix, Inc.
InventorDavid Eby
Life of this patent
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Abstract
Embodiments of the present invention provide a test and measurement instrument that displays acquired data on a logarithmic scale without intensity banding. The test and measurement instrument processes the acquired data before it is displayed by appending pseudo-random sub-LSB (least significant bit) values to it. When the processed acquired data is displayed on a logarithmic scale, the pseudo-random sub-LSB values fill in the gaps between discrete power levels, thereby eliminating intensity banding and providing a smooth, visually pleasing display.
Claims10
A test and measurement instrument comprising:
- a processor that appends pseudo-random values to digital data to produce processed digital data, the pseudo-random values having a distribution, and having a resolution that is less than a least significant bit of the digital data;
- and
- a display device that displays the processed digital data on a logarithmic scale.
A method of displaying digital data comprising the steps of:
- appending pseudo-random values to digital data to produce processed digital data, the pseudo-random values having a distribution, and having a resolution that is less than a least significant bit of the digital data;
- and
- displaying the processed digital data on a logarithmic scale on a display device.
Dependencies are inferred from the claim text.