Dynamic Range Tag Insertion in Video Broadcast VANC Space
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Solution Overview
Problem
High dynamic range (HDR) content is not fully appreciated in video creation and display due to standard dynamic range settings in video processing and display equipment, limiting the visual experience.
Innovation Solution
Real-time transmission of dynamic range tags within video broadcasts, using dynamic range tagging software to insert metadata into the Vertical Ancillary (VANC) Data space of video frames, allowing for frame-accurate information about each frame's dynamic range, color depth, and other parameters, enabling devices to adjust settings for optimal display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If HDR content is transmitted with standard dynamic range settings in video processing and display equipment, then the content can be displayed on standard equipment, but the HDR quality and visual experience are lost
Solution Approach 1:
The patent applies preliminary action by embedding dynamic range tags in advance within the video signal during encoding or transmission preparation. These tags contain pre-calculated metadata about luminance, chrominance, and color information that will guide subsequent display processing, allowing the system to prepare HDR information before the actual display occurs, thus ensuring both compatibility and quality
Solution Approach 2:
The patent uses an intermediary approach by introducing dynamic range tags as a metadata layer that mediates between HDR content and standard display equipment. These tags act as an intermediate communication channel, carrying essential HDR information (such as peak luminance, black level, color volume) that enables standard equipment to approximate HDR rendering without requiring full HDR hardware capabilities
2Measurement precision
If dynamic range tags are embedded in each video frame, then frame-accurate HDR information is provided for optimal display, but the data transmission bandwidth and processing complexity increase
Solution Approach 1:
The patent applies local quality by embedding dynamic range tags selectively in each video frame rather than using a single global setting for the entire video sequence. Each frame's tags contain only the specific dynamic range parameters needed for that particular frame, allowing precise local control of HDR display characteristics while avoiding the overhead of transmitting redundant information across all frames
Solution Approach 2:
The patent utilizes parameter changes by dynamically adjusting the dynamic range parameters (such as peak luminance, black level, gamma, and color volume) embedded in the tags based on the actual content of each frame. This allows the system to adapt the HDR parameters to match the specific luminance and color characteristics of different scenes, maintaining measurement precision while the parameters themselves change to reflect actual content requirements
Data Source
AI summary
There is provided systems and methods for storing and transmitting dynamic range tags in video using a non-transitory memory storing a video having a plurality of frames, a plurality of dynamic range tags corresponding to the plurality of frames, and a video tagging software, and a hardware processor executing the video tagging software stored in the non-transitory memory to obtain a frame of the plurality of frames of the video from the memory, obtain a dynamic range tag including information about the frame of the plurality of frames of the video from the memory, insert the dynamic range tag into a vertical ancillary data (VANC) space of the frame of the video to generate a modified video.