Beta Scale Dynamic Display Mapping for Video Codecs

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Solution Overview

Problem

Existing video codecs require a large number of image processing operations to generate display images, leading to increased bitrate and complexity in transmitting video signals across different dynamic range displays.

Innovation Solution

The implementation of beta scaling operations, which can replace or simplify other image processing operations such as tone mapping, color space conversion, and display mapping, by using beta scale maps that include scaling method indicators and parameters to perform dynamic range adjustments.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If multiple image processing operations (tone mapping, color space conversion, display mapping) are applied to generate display images, then image quality and adaptability across different displays is improved, but bitrate and system complexity increase

Engineering Contradiction:

Improveadaptability across different dynamic range displaysVSAvoidcomplexity of image processing operations

Core Design Contradiction:

Adaptability or versatilityVSDevice complexity

Solution Approach 1:

The patent combines multiple image processing operations (tone mapping, color space conversion, display mapping) into a single beta scaling operation. The beta scale map integrates these separate processing steps into one unified transformation that can handle different display types and dynamic ranges simultaneously, reducing computational complexity while maintaining adaptability.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The beta scaling operation serves multiple functions that were previously handled by separate operations. A single beta scale map can perform tone mapping, color space conversion, and display mapping for various display types (SDR, HDR, EDR), making the system universally applicable across different dynamic range displays without requiring multiple specialized processing chains.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Adaptability or versatility

If multiple image processing operations are applied to generate display images, then image quality and adaptability across different displays is improved, but bitrate requirements increase

Engineering Contradiction:

Improveadaptability across different dynamic range displaysVSAvoidbitrate for transmitting video signals

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

By merging multiple image processing operations into a single beta scaling operation, the patent reduces the amount of data that needs to be transmitted. Instead of sending separate parameters for tone mapping, color space conversion, and display mapping, the system transmits a compact beta scale map that encapsulates all necessary transformation information, thereby reducing bitrate requirements.

Inventive Principle:

Principle #5Merging (Combining)

3Productivity

If traditional image processing operations are used, then comprehensive display optimization is achieved, but processing time and computational load increase

Engineering Contradiction:

Improveprocessing efficiencyVSAvoidtime for image processing operations

Core Design Contradiction:

ProductivityVSLoss of time

Solution Approach 1:

The patent merges multiple sequential image processing operations into a single beta scaling operation that can be applied in one computational step. This consolidation dramatically reduces processing time and computational load compared to applying tone mapping, color space conversion, and display mapping as separate sequential operations.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The beta scaling operation uses parameter changes through the beta scale map to achieve display optimization. By adjusting beta parameters (scaling factors and offset values) in the map, the system can adapt to different display characteristics without requiring complex multi-step processing, thereby improving processing efficiency while maintaining optimization quality.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS20250106410A1Beta scale dynamic display mapping

Publication Date: 2025.03.27 DOLBY LABORATORIES LICENSING CORP

AI summary

An input image to be coded into a video signal and a target image are received. The input image and the target image depict same visual content. One or more beta scaling method indicators and one or more sets of one or more beta scale parameters are generated. The one or more beta scaling method indicators indicate one or more beta scaling methods that use the one or more sets of beta scale parameters to perform beta scaling operations on the input image to generate a reconstructed image to approximate the target image. The input image, along with the one or more beta scaling method indicators and the one or more sets of beta scale parameters. is encoded into the video signal for allowing a recipient device of the video signal to generate the reconstructed image.