Wireless Display Latency Reduction via Video Component Transmission
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Solution Overview
Problem
Current wireless display systems face inefficiencies in resource consumption and performance when transmitting audio and video data between source and sink devices, particularly on resource-limited devices, due to the need for encoding and decoding pixel data, which can impact responsiveness and battery life.
Innovation Solution
Implementing a system where wireless source devices can operate in both pixel domain and video component modes, allowing for the transmission of video component data with metadata, reducing the need for encoding and decoding, and enabling sink devices to generate pixel data for synchronized rendering.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel data encoding and decoding is performed in wireless display systems, then audio and video data can be transmitted between source and sink devices, but system resource consumption increases and battery life decreases
Solution Approach 1:
The patent extracts the encoding/decoding operations from the resource-limited wireless devices and relocates them to a more powerful processing system. The source device captures video frames and encodes them, then transmits the encoded data wirelessly to the sink device which decodes and displays it. This extraction of computationally intensive operations from mobile devices resolves the contradiction by maintaining reliable video transmission while reducing battery consumption on portable equipment.
Solution Approach 2:
The patent introduces an intermediary processing architecture where video data flows through multiple specialized components: a capture module at the source, a wireless communication interface, and a display module at the sink. This intermediary structure allows each component to perform optimized functions - encoding at the source, wireless transmission in the middle, and decoding/display at the destination - thereby reducing overall system resource consumption while maintaining transmission reliability.
2Stability of the object's composition
If pixel data is transmitted between wireless devices, then synchronized audio and video rendering is achieved, but responsiveness and performance deteriorate on resource-limited devices
Solution Approach 1:
The patent extracts the computationally intensive pixel data processing from resource-limited wireless devices and performs encoding at the source device and decoding at the sink device. This extraction maintains synchronized audio and video rendering through proper timing and buffering mechanisms while significantly improving responsiveness on mobile devices that no longer need to perform heavy encoding/decoding operations.
Solution Approach 2:
The patent changes the parameter of data representation from raw pixel data to encoded video data during transmission. By transforming the video data into a compressed format with appropriate timing metadata, the system achieves synchronized rendering at the destination while reducing the processing burden on intermediate wireless devices, thereby improving overall system responsiveness.
3Reliability
If encoding and decoding operations are performed on resource-limited wireless devices, then video data can be processed and transmitted, but device complexity and processing requirements increase
Solution Approach 1:
The patent extracts the complex encoding and decoding operations from resource-limited wireless devices and relocates them to devices better suited for these tasks - the source device for encoding and the sink device for decoding. This extraction reduces device complexity on portable equipment while maintaining reliable video data processing and transmission through the wireless medium.
Data Source
Figure 1A
Figure 1B
Figure 2A
AI summary
As part of a communication session, a wireless source device can transmit video component data and metadata to a wireless sink device. The wireless source device can intercept the video component data prior to the video component data being rendered by the wireless source device, and the wireless sink device can generate a frame of video data based on the video component data and the metadata.