Frequency Layer Blending for Video Strobe Reduction
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Solution Overview
Problem
Conventional receivers experience motion picture quality degradation due to strobing when decoding high frame rate broadcast streams, particularly at frequencies like 240 Hz or higher, as the temporal continuity of partially decoded images is impaired, leading to reduced image quality when reproducing images at lower frequencies.
Innovation Solution
A receiving apparatus that hierarchically decomposes image data into multiple frequency layers, with only the lowermost frequency layer undergoing blending processing using data from higher frequency layers, and a transmitting apparatus that transmits these layers, allowing for de-blending processing based on added blending information to maintain high image quality across different frame frequencies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all images at 1/2 frequency and 1/4 frequency are blended with high frame rate images, then motion picture quality degradation is reduced, but image quality at lower frame frequencies degrades
Solution Approach 1:
The patent segments images into different frequency layers (1/2 frequency layer, 1/4 frequency layer, and high frame rate layer) and applies blending processing selectively to each layer based on its specific requirements, rather than uniformly blending all layers together
Solution Approach 2:
Different quality processing is applied to different frequency layers: the 1/2 frequency layer undergoes blending processing to reduce strobing, while the 1/4 frequency layer maintains original high quality without blending, and the high frame rate layer serves as reference without degradation
2Productivity
If conventional receivers perform temporal sub-sampling at high frame rates, then processing load is reduced, but motion picture quality degrades due to strobing
Solution Approach 1:
The transmitting apparatus performs preliminary blending processing on images at different frequency layers before transmission, so that the receiving apparatus can directly display images with reduced strobing without requiring complex real-time blending operations
Solution Approach 2:
The patent introduces an intermediate frequency layer (1/2 frequency layer) that is blended with high frame rate images to serve as a mediator, reducing the temporal discontinuity between high frame rate images and the final display frame rate, thereby reducing strobing effects
Data Source
AI summary
It is made possible to reduce motion picture quality degradation caused by strobing in a layer of a basic frame frequency and to maintain a high image quality in layers of the other frame frequencies.Image data in a plurality of frequency layers (only image data regarding a lowermost frequency layer is subjected to blending processing using image data regarding another frequency layer) obtained by hierarchically decomposing image data at a predetermined frame frequency is received. Image data for display is obtained according to a display capability, using image data regarding layers from the lowermost frequency layer up to a predetermined higher frequency layer. It is possible to reduce the motion picture quality degradation caused by the strobing in the layer of the basic frame frequency (frame frequency of the lowermost frequency layer) and to maintain the high image quality in the layers of the other frame frequencies.