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US 10,873,747 B2Granted
Residual mapping method for image/video compression
AssigneeSony Corporation
InventorsHye-Yeon Cheong, Ali Tabatabai
Life of this patent
Estimating the term…
Abstract
To improve encoding efficiency, residual values are mapped so that only non-negative values are utilized when performing the encoding process.
Claims17
A method programmed in a non-transitory memory of a device comprising:
- mapping residual values from including negative residual values to only including non-negative residual values, wherein mapping the residual values includes mapping zero to zero, and mapping a first positive residual value with a first distance closest to zero to a first non-negative residual value, mapping a first negative residual value with the first distance to a second non-negative residual value, which is greater than the first non-negative residual value, continuing mapping all residual values by alternating positive residual values and negative residual values and increasing their distance;
- and
- encoding content using the non-negative residual values.
An apparatus comprising:
- a non-transitory memory for storing an application, the application for:
- mapping residual values from including negative residual values to only including non-negative residual values, wherein mapping the residual values includes mapping zero to zero, and mapping a first positive residual value with a first distance closest to zero to a first non-negative residual value, mapping a first negative residual value with the first distance to a second non-negative residual value, which is greater than the first non-negative residual value, continuing mapping all residual values by alternating positive residual values and negative residual values and increasing their distance;
- and
- encoding content using the non-negative residual values;
- a processor coupled to the memory, the processor configured for processing the application.
2 more elements
A system comprising:
- a first computing device configured for:
- mapping residual values from including negative residual values to only including non-negative residual values, wherein mapping the residual values includes mapping zero to zero, and mapping a first positive residual value with a first distance closest to zero to a first non-negative residual value, mapping a first negative residual value with the first distance to a second non-negative residual value, which is greater than the first non-negative residual value, continuing mapping all residual values by alternating positive residual values and negative residual values and increasing their distance;
- and
- encoding content using the non-negative residual values;
- and
- a second computing device configured for:
- decoding the encoded content.
4 more elements
Dependencies are inferred from the claim text.