On-Screen Display Generation via Remote Drawing Commands
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Solution Overview
Problem
Current systems face challenges in delivering High Definition (HD) programming content over networks with limited bandwidth without degrading picture quality, as recompressing video and OSD information results in noticeable quality loss.
Innovation Solution
A display device with interface circuitry to receive signals from multiple source devices on a network, a display management module to mediate conflicting drawing commands, video processing circuitry to decompress and blend OSD signals with video signals, and transmitters to combine and transmit these signals, allowing for efficient generation and display of OSDs across the network.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If video signals and OSD information are recompressed before transmission over the network, then bandwidth usage is reduced, but picture quality deteriorates with noticeable degradation
Solution Approach 1:
The system segments the video signal transmission by separating the compressed video data from the OSD generation process. The video is compressed and transmitted over the network, while OSD generation is handled separately by the display device using received drawing commands, avoiding the need to recompress already compressed video data and thus preventing quality loss
Solution Approach 2:
The patent introduces an intermediary approach where drawing commands are transmitted over the network instead of generating full OSD signals at the source. The display device acts as an intermediary that receives these lightweight commands and generates the actual OSD signals locally, reducing network bandwidth requirements without compromising OSD quality
2Device complexity
If OSD signals are generated remotely from the TV, then device complexity is reduced, but control precision deteriorates
Solution Approach 1:
The display device serves as an intermediary that receives drawing commands from remote video source devices and generates OSD signals locally. This intermediary approach allows the TV to offload OSD generation complexity while maintaining precise control through the standardized drawing command protocol
Solution Approach 2:
The system uses a copying approach where drawing commands are transmitted from the video source device to the display device. These commands are essentially instructions that tell the display device how to generate OSD signals, copying the control logic rather than the full OSD signal generation process
Data Source
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AI summary
In some embodiments, an apparatus includes interface circuitry to receive signals including video signals and drawing commands, and a command interpreter to receive the drawing commands and provide on screen display (OSD) signals in response to the drawing commands. Video processing circuitry processes the received video signals to provide processed video signals, and a blender to blend the OSD signals and the processed video signals to produce blended video signals including the OSD signals and the processed video signals. Other embodiments are described and claimed.