Video Signal Receiver Alignment for Seamless Broadcast Switching
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Solution Overview
Problem
When mobile terminals, such as car navigation systems, switch between full-segment and one-segment video signals to maintain optimal video quality based on radio wave reception, differences in encoding methods lead to misalignment and discomfort for users due to variations in video size and aspect ratio.
Innovation Solution
A video signal receiving apparatus that calculates the similarity degree between images from different video signals and adjusts the size and position of the second video signal to match the first, using scaling and shift processing to minimize misalignment and ensure a seamless display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If switching between full-segment and one-segment video signals is performed to maintain optimal video quality, then video quality is improved, but misalignment and discomfort occur due to differences in aspect ratio and video size
Solution Approach 1:
The patent applies parameter changes by dynamically adjusting the aspect ratio and video size parameters of the decoded video signals. The arithmetic processing unit calculates adjustment amounts based on similarity degree comparisons, then modifies the display parameters (aspect ratio and size) to align different video signals, resolving the misalignment issue while maintaining video quality
Solution Approach 2:
The patent implements feedback through the similarity degree calculation process. The system calculates similarity degrees between different video signals, uses this feedback to determine optimal adjustment amounts, and iteratively refines the alignment until maximum similarity is achieved, ensuring consistent display across signal switches
2Adaptability or versatility
If different encoding methods are used for full-segment and one-segment video signals, then adaptability to different reception conditions is improved, but misalignment in video size and aspect ratio occurs
Solution Approach 1:
The patent applies preliminary action by performing similarity degree calculations and determining adjustment amounts before the actual video display. The arithmetic processing unit pre-calculates the necessary aspect ratio and size adjustments based on the encoded video signals, so that when switching between full-segment and one-segment signals, the alignment is already prepared and applied seamlessly
Solution Approach 2:
The patent introduces an intermediary process between decoding and display: the arithmetic processing unit acts as a mediator that receives different encoded video signals, calculates similarity degrees, determines adjustment amounts, and outputs aligned video signals. This intermediary step harmonizes the different encoding methods while maintaining alignment precision
Data Source
AI summary
A video signal receiving apparatus receives a first and second video signals for transmitting a same video content. When determining a size adjustment amount of a second video included in the second video signal, the video signal receiving apparatus performs scaling processing on a second image included in the second video signal to generate a scaling image and performs shift processing on the second image to generate a shift image. The video signal receiving apparatus calculates a similarity degree between a first image included in the first video signal and the scaling image, calculates a similarity degree between the first image and the shift image, and uses the scaling image or the shift image having the higher calculated similarity degree as an image to be subjected to the next scaling processing and the next shift processing.