Bit expansion method and apparatus
AssigneeLG Display Co., Ltd.
InventorHideo NAKAYA
Life of this patent
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Abstract
Disclosed is a bit expansion process portion that expands p bits, which a resolution of a brightness value of a digital input picture has, to q bits (where q>p). When a brightness value of an attention pixel of the digital input picture is bit-expanded, the bit expansion process portion applies a weight to the brightness value of the attention pixel according to a magnitude relation of the brightness value of the attention pixel and brightness values of a plurality of surrounding pixels, which are located surrounding the attention pixel, and conducts a gain compensation for the brightness value of the attention pixel after the weight is applied, thereby performing a bit expansion process from the p bits to the q bits.
Claims5
A picture signal process apparatus, comprising:
- a bit expansion process portion that expands p bits, which a resolution of a brightness value of a digital input picture has, to q bits (where q>p),
- wherein when a brightness value of an attention pixel of the digital input picture is bit-expanded, the bit expansion process portion applies a weight to the brightness value of the attention pixel according to a magnitude relation of the brightness value of the attention pixel and brightness values of a plurality of surrounding pixels, which are located surrounding the attention pixel, and conducts a gain compensation for the brightness value of the attention pixel after the weight is applied.
A bit expansion method which is performed at a picture signal process apparatus including a bit expansion process portion that expands p bits, which a resolution of a brightness value of a digital input picture has, to q bits (where q>p), the method comprising:
- a weight application step at the bit expansion process portion of, when a brightness value of an attention pixel of the digital input picture is bit-expanded, applying a weight to the brightness value of the attention pixel according to a magnitude relation of the brightness value of the attention pixel and brightness values of a plurality of surrounding pixels, which are located surrounding the attention pixel;
- and
- a gain compensation step at the bit expansion process portion of conducting a gain compensation for the brightness value of the attention pixel after the weight is applied.
Dependencies are inferred from the claim text.