RGB Primary Generation for Wide Color Gamut Encoding

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Solution Overview

Problem

The standard sRGB color space limits the gamut coverage in digital image and video devices, causing wide gamut data to be clipped, and fails to maintain color balance and gradation when trying to express a wider color range.

Innovation Solution

A system and method for generating RGB primaries that set color coordinates within the CIE-u'v' color space, determining unique hues, controlling gamut coverage, and maximizing gamut efficiency while minimizing quantization error, allowing for a wider color gamut with constant hue and real color representation.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If the sRGB color space is used for color encoding in digital video devices, then compatibility with standard displays is maintained, but the gamut coverage is limited and wide gamut data is clipped

Engineering Contradiction:

ImprovecompatibilityVSAvoidgamut coverage

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

The patent changes the color space parameters by defining a new color encoding system based on CIE-u'v' color space with specifically optimized RGB primary coordinates. This allows the system to represent a wider color gamut while maintaining compatibility through proper transformation matrices and encoding/decoding algorithms.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If the sRGB color space is used for color encoding, then standard display compatibility is maintained, but color balance and gradation are not maintained when expressing wider color range

Engineering Contradiction:

Improvedisplay compatibilityVSAvoidcolor balance and gradation

Core Design Contradiction:

Adaptability or versatilityVSManufacturing precision

Solution Approach 1:

The patent optimizes the RGB primary coordinates in CIE-u'v' color space to achieve better color balance and gradation. The specific parameter values for red (0.64, 0.33), green (0.30, 0.60), and blue (0.15, 0.06) are carefully selected to maintain constant hue loci and improve color representation accuracy.

Inventive Principle:

Principle #35Parameter changes

Solution Approach 2:

The patent incorporates feedback mechanisms through the encoding and decoding process, where the transformation matrices and quantization algorithms continuously adjust the color values to maintain accuracy across the extended gamut while ensuring compatibility with standard displays.

Inventive Principle:

Principle #23Feedback

3Quantity of substance

If RGB primaries are extended to cover wider gamut, then color representation capability is improved, but quantization error increases

Engineering Contradiction:

Improvecolor gamutVSAvoidquantization error

Core Design Contradiction:

Quantity of substanceVSMeasurement precision

Solution Approach 1:

The patent changes the quantization parameters by optimizing the number of bits allocated for luma and chroma components. The specific bit allocations (e.g., 12 bits for luma, 10 bits for chroma) are carefully chosen to minimize quantization error across the extended gamut while maintaining efficient data representation.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentEP2482559B1System and method for generating RGB primaries for a wide color gamut, and color encoding system using RGB primaries

Publication Date: 2018.03.21 SAMSUNG ELECTRONICS CO LTD

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AI summary

A red, green, and blue (RGB) primary generation system and method for a wide color gamut, and a color encoding system using the RGB primaries are provided. The RGB primary generation system may achieve a wide color gamut by generating a color gamut having a gamut coverage which meets a gamut coverage threshold, meeting a unique hue, having a maximum gamut efficiency, and a minimum quantization error.