Transmission Device Display Position Control via Container Metadata
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Solution Overview
Problem
Conventional multi-screen display technologies do not allow the transmitting side to actively control the display position of images, leading to limitations in how multiple streams are presented, such as in Picture in Picture mode or side-by-side displays, where the provider side does not specify the display arrangement, and images from different sources are often displayed separately without coordination.
Innovation Solution
A transmitting apparatus that inserts display position specification information into a container, such as a transport stream, allowing the transmitting side to control the display position of images, subtitles, and electronic program guide information, enabling dynamic positioning and permission for display on specific screens or windows.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional multi-screen display techniques are used, then multiple images can be displayed simultaneously, but the transmitting side cannot actively control the display position of images
Solution Approach 1:
The patent applies preliminary action by embedding display position specification information into the transport stream during the transmission phase. The transmitting side pre-defines the display position, screen ID, and window ID for each video stream in advance, so that the receiving side can directly follow these instructions without requiring complex real-time control mechanisms.
Solution Approach 2:
The patent introduces an intermediary mechanism through standardized metadata fields (screen_id, window_id, display position coordinates) that mediate between the transmitting side's display intentions and the receiving side's display execution. This intermediary layer enables precise control while maintaining system compatibility.
2Ease of operation
If display position specification information is inserted into the container, then the transmitting side can control display position, but the data structure becomes more complex
Solution Approach 1:
The patent applies universality by designing a multi-functional metadata structure that can specify display position, screen identification, and window identification within a unified framework. This standardized structure serves multiple purposes: position control, stream identification, and display arrangement, reducing the need for separate complex data structures.
Solution Approach 2:
The patent utilizes parameter changes by dynamically assigning different values to screen_id, window_id, and display position parameters for different video streams. This allows flexible control of multiple images on multiple screens by simply changing parameter values rather than restructuring the data format.
3Ease of operation
If multiple streams are displayed without coordinated positioning, then implementation flexibility is maintained, but the provider side cannot specify the display arrangement
Solution Approach 1:
The patent applies dynamics by enabling flexible display arrangements through programmable parameters. The system can dynamically adjust display positions, screen assignments, and window configurations based on the transmitted metadata, allowing both provider-specified arrangements and adaptive implementations depending on receiving side capabilities.
Solution Approach 2:
The patent incorporates feedback mechanisms where the receiving side processes the display position specification information and executes the display arrangement accordingly. This feedback loop ensures that the transmitting side's display intentions are accurately reflected on the receiving side while allowing for implementation variations based on device capabilities.
Data Source
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AI summary
A transmitting side can actively control a display position of an image. A container in a predetermined format that includes a video stream obtained by coding image data is transmitted. Display position specification information that specifies a display position of the image by the image data is inserted into a layer of the container. For example, the display position specification information is information that specifies a screen of display target. Additionally, for example, the display position specification information is information that specifies a display unit on a screen of display target. For example, information indicative of whether to change a position of the display unit on the screen of display target specified by the display position specification information or not may be inserted into a layer of the video stream.