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US 2020/0007151 A1Published application
Guaranteed Data Compression
AssigneeImagination Technologies Limited
InventorsSimon Fenney, Linling Zhang
Life of this patent
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Abstract
A method of converting 10-bit pixel data (e.g. 10:10:10:2 data) into 8-bit pixel data involves converting the 10-bit values to 8-bits using a technique that is selected dependent upon the values of the MSBs of the 10-bit values and setting the value of an HDR flag dependent upon the values of the MSBs. The HDR flag is appended to the 3-bit channel.
Claims19
A method of converting 10-bit pixel data into 8-bit pixel data, the method comprising:
- determining whether an MSB of any of red, green or blue channel values is equal to one;
- in response to determining that at least one MSB is equal to one, setting a flag to a first value and converting each of the red, green and blue channel values from 10-bits to 8-bits;
- in response to determining that no MSB is equal to one, setting the flag to a second value and truncating each of the red, green and blue channel values by removing the MSB and LSB from each value;
- and
- appending the flag to an alpha channel value.
2 more elements
Hardware logic arranged to convert 10-bit pixel data into 8-bit pixel data, the hardware logic comprising:
- determining logic arranged to determine whether an MSB of any of red, green or blue channel values is equal to one;
- hardware logic arranged in response to determining that at least one MSB is equal to one, to set a flag to a first value and to convert each of the red, green and blue channel values from 10-bits to 8-bits and in response to determining that no MSB is equal to one, to set the flag to a second value and truncate each of the red, green and blue channel values by removing the MSB and LSB from each value;
- and
- appending logic arranged to append the flag to an alpha channel value.
1 more element
Dependencies are inferred from the claim text.