EDR Video Decoding via Layered Bitstream Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing set-top boxes often lack sufficient processing power to perform image-content dependent display management for enhanced dynamic range (EDR) video, resulting in suboptimal video quality performance.
Innovation Solution
The decoding and display of EDR video signals are optimized by moving some decoding operations from the digital media player to the attached EDR display, using a layered bitstream approach where a base layer and enhancement layer are decoded and combined with metadata to adapt the signal for display, and graphics are interleaved with the video signal for efficient transmission and processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If decoding operations are performed on the digital media player, then processing compatibility is maintained, but video quality performance is suboptimal due to insufficient processing power
Solution Approach 1:
The patent segments the decoding operations into two parts: base layer decoding performed by the digital media player (maintaining compatibility) and enhancement layer processing performed by the EDR display (improving quality). This division allows each component to handle tasks appropriate to its capabilities.
Solution Approach 2:
The patent introduces an intermediary layered bitstream format that carries both base layer and enhancement layer data. This intermediary structure enables the distribution of processing tasks between the media player and display, with the bitstream serving as the medium that carries decoded data from the player to the display for further processing.
2Productivity
If advanced decoding operations are performed for EDR video, then video quality is improved, but compatibility with legacy systems is reduced
Solution Approach 1:
The video signal is segmented into a base layer that contains information compatible with legacy systems and an enhancement layer that provides EDR quality improvements. Legacy systems can process the base layer alone, while advanced systems can process both layers for superior quality.
Solution Approach 2:
The layered bitstream structure serves multiple functions: it maintains compatibility with legacy decoding systems while simultaneously enabling enhanced EDR video quality on advanced displays. The same bitstream can be processed differently depending on the capabilities of the receiving system.
3Productivity
If all decoding operations are performed on the EDR display, then video quality performance is maximized, but device complexity increases
Solution Approach 1:
The decoding workload is segmented between the digital media player (base layer decoding) and the EDR display (enhancement layer processing). This segmentation prevents the display from bearing the full burden of complex decoding operations while still achieving high video quality.
Solution Approach 2:
The base layer decoding is performed in advance by the digital media player before the enhancement layer processing occurs at the display. This preliminary action reduces the real-time processing complexity at the display while maintaining overall video quality performance.
Data Source
AI summary
Novel methods and systems for decoding and displaying enhanced dynamic range (EDR) video signals are disclosed. To accommodate legacy digital media players with constrained computational resources, compositing and display management (DM) operations are moved from a digital media player to its attached EDR display. On a video receiver, base and enhancement video layers are decoded and multiplexed together with overlay graphics into an interleaved stream. The video and graphics signals are all converted to a common format which allows metadata to be embedded in the interleaved signal as part of the least significant bits in the chroma channels. On the display, the video and the graphics are de-interleaved. After compositing and display management operations guided by the received metadata, the received graphics data are blended with the output of the DM process and the final video output is displayed on the display's panel.