Video Transceiver Aspect Ratio Control for Legacy Receiver Compatibility
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Legacy HD receivers struggle to process UHD videos with different aspect ratios, requiring specific receivers for each format and often resulting in issues with subtitle handling and display adjustments.
Innovation Solution
A method and apparatus for encoding and transmitting video data that includes aspect ratio control information, allowing the video to be adjusted to fit the display device's aspect ratio, and multiplexing this information with the video stream for seamless processing across various receivers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a legacy HD receiver processes UHD video with a different aspect ratio, then the receiver can display UHD content, but the display quality and subtitle handling deteriorate due to aspect ratio mismatch
Solution Approach 1:
The transmitter performs preliminary processing by dividing the UHD video stream into multiple HD video streams before transmission. Each divided stream is pre-adapted to fit HD receiver capabilities, eliminating the need for complex real-time processing at the receiver end and ensuring optimal display quality across different receiver types.
Solution Approach 2:
The UHD video stream is segmented into multiple separate HD video streams. This segmentation allows each stream to be independently optimized for HD receivers while collectively representing the full UHD content, resolving the contradiction between receiver compatibility and display quality.
2Ease of operation
If a receiver with a fixed aspect ratio processes video with a different aspect ratio, then the receiver can display the video, but subtitle positioning and video framing deteriorate
Solution Approach 1:
Subtitle positioning information is preliminarily embedded into each divided video stream during the segmentation process. This ensures that subtitles are correctly positioned in each HD stream before transmission, preventing loss of positioning accuracy when the video is played back on receivers with different aspect ratios.
Solution Approach 2:
Different portions of the UHD video stream are processed with different quality characteristics suitable for HD receivers. Each divided stream contains locally optimized video and subtitle positioning information tailored for HD display, ensuring that subtitle positioning accuracy is maintained while enabling playback on various receivers.
3Loss of energy
If UHD video is transmitted without aspect ratio control information, then the transmission bandwidth is reduced, but the receiver's ability to correctly display the video deteriorates
Solution Approach 1:
Aspect ratio control information is preliminarily embedded into each divided video stream during the segmentation process. This preliminary inclusion ensures that receivers can correctly interpret and display the video content without requiring additional transmission bandwidth, as the control information travels with each stream segment.
Solution Approach 2:
The aspect ratio control information is merged with each divided video stream, combining the video data and control metadata into unified streams. This merging approach maintains video display accuracy while avoiding separate transmission channels that would increase bandwidth requirements.
4Adaptability or versatility
If multiple video streams with different aspect ratios are transmitted, then receiver versatility is improved, but the system complexity increases
Solution Approach 1:
The UHD video stream is segmented into multiple standardized HD streams with uniform structure. This segmentation approach improves receiver versatility by making content accessible to HD receivers while maintaining relatively simple transmission system architecture, as each segment follows the same format and includes embedded control information.
Solution Approach 2:
The video stream parameters are changed during segmentation to create multiple HD-compatible streams from a single UHD source. By systematically adjusting resolution and aspect ratio parameters during the division process, the system achieves broad receiver compatibility without requiring complex adaptive processing at the transmitter.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present invention relates to an apparatus for transceiving signals and a method for transceiving signals. One embodiment of the present invention provides a method for transmitting signals comprising the steps of: encoding video data; generating signaling information which signals displayingthe encoded video data so as to fit the screen ratio of a receiver, wherein the signaling information includes screen ratio control information for displaying high-resolution video data of a first screen ratio regardless of the screen ratio of the receiver; and multiplexing the encoded video data and the signaling information and transmitting the multiplexed video data and the signaling information.