Display Device Adaptive Frame Interpolation for Judder Reduction
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Solution Overview
Problem
Display devices face issues with video cadence changes and frame missing, leading to a disconnection in video playback when receiving video from a set-top box with a fixed output frequency, causing a bad-editing phenomenon that disrupts the viewing experience.
Innovation Solution
A display device with a control unit that determines abnormal output states and generates interpolation frames based on a previous video frame pattern to output the original video naturally, adjusting the number of interpolation frames to compensate for frequency changes and cadence disruptions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the set-top box outputs video with a fixed output frequency, then the video signal can be transmitted stably, but video cadence changes and frame missing occur causing bad-editing phenomenon
Solution Approach 1:
The patent applies dynamics by making the frame repetition pattern adaptive rather than fixed. The control unit dynamically adjusts the frame repetition pattern based on the detected original video frequency, transforming the rigid fixed-frequency output system into a flexible system that adapts to different video sources, thereby resolving the contradiction between transmission stability and playback naturalness
Solution Approach 2:
The patent changes the parameter of frame repetition pattern based on the detected video frequency. By detecting the original video frequency and selectively applying different frame repetition patterns (e.g., 3:2, 2:2, 4:2:2:2) corresponding to different frequencies (24Hz, 30Hz, 60Hz), the system optimizes playback naturalness while maintaining stable signal transmission
2Device complexity
If the display device uses a fixed frame repetition pattern, then the processing is simple, but the Judder phenomenon occurs and video cadence is disrupted
Solution Approach 1:
The patent applies preliminary action by detecting the original video frequency before generating the output video signal. The control unit detects the frequency of the original video and pre-selects the appropriate frame repetition pattern based on the detected frequency, thereby preventing the Judder phenomenon before it occurs rather than correcting it afterward
Solution Approach 2:
The patent implements feedback by detecting the original video frequency and using this information to adjust the frame repetition pattern. The control unit continuously monitors the video signal characteristics and adjusts the frame generation accordingly, creating a closed-loop system that eliminates the Judder phenomenon while maintaining simple processing
3Productivity
If the set-top box converts original video to fixed frequency video, then the output signal is standardized, but frames are missing and cadence changes occur
Solution Approach 1:
The patent applies dynamics by implementing adaptive frame generation that adjusts to different original video frequencies. Instead of using a fixed conversion ratio, the system dynamically selects appropriate frame repetition patterns based on the detected original frequency, maintaining both conversion efficiency and frame accuracy across different video sources
Solution Approach 2:
The patent changes the frame generation parameters based on the original video frequency. By detecting whether the original video is 24Hz, 30Hz, or 60Hz and selectively applying corresponding frame repetition patterns, the system maintains accurate frame representation while achieving efficient standardized output
Data Source
AI summary
A display device includes a display unit, an external device interface unit configured to receive video having a second frequency from a set-top box converting an original video having a first frequency into the video having the second frequency, and a control unit configured to: determine whether an abnormal output state is detected, based on the video having the second frequency; when the abnormal output state is detected, determine the number of interpolation frames to be generated so as to output the original video having the first frequency as final video having a third frequency through the display unit; and generate interpolation frames as many as the determined number of interpolation frames.