Dynamic Metadata Switching for HDR Playback Synchronization
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Solution Overview
Problem
High dynamic range (HDR) content playback in display apparatuses faces challenges with dynamic metadata processing, leading to increased load and potential synchronization issues between metadata and content data, causing visual discomfort due to flickering or abnormal brightness changes when played back at fast speeds.
Innovation Solution
The solution involves transmitting additional data that includes identification information for playback speed, allowing the display apparatus to perform either a dynamic or static compensatory process, depending on the section of content data, to reduce processing load and ensure synchronization, with the additional data comprising information for either a first compensatory process or a second process with lower processing load.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If dynamic metadata processing is performed for HDR content playback, then image quality and brightness accuracy are improved, but processing load increases and synchronization issues occur at fast playback speeds
Solution Approach 1:
The patent dynamically switches between static and dynamic metadata processing modes based on playback speed. At normal playback speeds, dynamic metadata processing is used to maintain high brightness accuracy. At fast playback speeds, the system transitions to static metadata processing to reduce processing load and prevent synchronization issues, thus adapting the processing approach to match the playback conditions.
Solution Approach 2:
The patent changes the metadata processing parameter from dynamic to static based on playback speed threshold. When playback speed exceeds a predetermined threshold, the system changes the metadata type from dynamic to static, which fundamentally alters the processing characteristics from real-time scene-adapted processing to fixed-parameter processing, thereby resolving the contradiction between accuracy and speed.
2Manufacturing precision
If dynamic metadata with scene-dependent values is used, then image quality is improved, but processing load increases and synchronization between metadata and content data deteriorates
Solution Approach 1:
The system dynamically adjusts the metadata processing approach based on playback speed conditions. At normal speeds, dynamic metadata maintains synchronization with scene changes. At fast playback speeds, the system switches to static metadata to ensure synchronization reliability, preventing the metadata from falling behind the rapidly changing content data.
Solution Approach 2:
The patent anticipates synchronization issues by proactively switching to static metadata before asynchronization occurs. When fast playback is detected, the system preemptively uses static metadata that does not require real-time processing, thereby preventing the metadata-content data asynchronization that would otherwise occur during rapid scene transitions.
3Manufacturing precision
If real-time processing of dynamically varied metadata is performed, then brightness accuracy is improved, but processing load increases causing visual discomfort
Solution Approach 1:
The patent changes the processing parameter from real-time dynamic metadata to static metadata based on playback speed. This parameter change fundamentally simplifies the processing load by eliminating the need for real-time scene analysis and metadata generation, while still maintaining acceptable brightness accuracy through the use of pre-determined static metadata values.
Solution Approach 2:
The system dynamically selects the appropriate metadata processing mode based on playback speed conditions. This dynamic adaptation allows the system to maintain high brightness accuracy at normal speeds while reducing processing complexity at fast speeds, thereby resolving the contradiction between accuracy and processing load.
4Productivity
If fast speed playback is enabled, then productivity is improved, but synchronization between metadata and content data deteriorates causing flickering images
Solution Approach 1:
The patent changes the metadata type parameter from dynamic to static when fast playback speed is detected. This parameter change ensures that the metadata does not require real-time processing updates, thereby maintaining synchronization with the rapidly advancing content data and preventing flickering images during fast playback.
Solution Approach 2:
The system proactively switches to static metadata processing when fast playback is initiated, preventing synchronization issues before they occur. This preliminary action ensures that even at high playback speeds, the metadata remains synchronized with content data, thereby maintaining image stability without compromising playback speed.
Data Source
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AI summary
Disclosed are a content providing apparatus, a method of controlling the same, and a recording medium thereof, the content providing apparatus including: a transmitter configured to transmit data to a display apparatus; and a processor configured to control the transmitter to transmit content data and additional data, relating to image attributes of the content data and having a fixed value corresponding to at least one section, among a plurality of sections of the content data, to the display apparatus based on a command received from a user to playback image content at a predetermined speed. Thus, it is possible to solve a problem of flickering or an error in brightness of a screen at a variable-speed playback of dynamic HDR content.