Wireless Video Transmitter Cross-Layer Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
High-quality video transmission over wireless channels is challenging due to bandwidth scarcity, high and variable latency, and susceptibility to noise, which complicates providing guaranteed Quality of Service (QoS) for high data rate and time-sensitive video streaming.
Innovation Solution
A cross-layer optimization system that dynamically adjusts parameters across different layers (Application, Media Access Control, and Physical) using information from one layer to optimize others, employing techniques like unequal error protection, dynamic profile partitioning, and adaptive modulation and coding to ensure seamless video streaming.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If high data rate video transmission is implemented over wireless channel, then video quality is improved, but bandwidth consumption increases and QoS guarantee becomes difficult
Solution Approach 1:
The patent segments the video data transmission into multiple parallel streams using spatial multiplexing. The transmitter divides video data into multiple spatial layers that can be transmitted simultaneously over the wireless channel, allowing high-quality video transmission while distributing bandwidth consumption across multiple streams. This segmentation enables efficient utilization of available bandwidth resources.
Solution Approach 2:
The patent dynamically adjusts transmission parameters including modulation order, coding rate, and spatial layer allocation based on channel conditions. By changing these parameters adaptively, the system maintains high video quality while optimizing bandwidth consumption according to real-time wireless channel capacity, thus addressing the QoS guarantee challenge.
2Speed
If real-time video transmission at 60 fps is implemented, then video smoothness is improved, but latency requirement becomes more stringent
Solution Approach 1:
The patent performs preliminary encoding and spatial layering of video frames at the transmitter before transmission. By pre-processing video data into spatial layers and preparing transmission packets in advance, the system reduces processing latency at both transmitter and receiver ends, enabling 60 fps smooth video playback while meeting stringent timing requirements.
Solution Approach 2:
The patent implements continuous transmission of spatial layers without interruption, ensuring that video frames are transmitted and received continuously at 60 fps. This continuous action maintains video smoothness while minimizing gaps that would contribute to latency, allowing the display to render frames without interruption.
3Adaptability or versatility
If wireless channel is used for video transmission, then mobility and flexibility are improved, but susceptibility to interference and noise increases
Solution Approach 1:
The patent applies different error protection levels to different spatial layers based on their importance. Critical spatial layers receive stronger error correction coding while less critical layers use lighter protection. This local quality differentiation maintains video quality under interference while optimizing bandwidth usage, and the spatial diversity provided by multiple layers enhances robustness against wireless channel noise.
Solution Approach 2:
The patent combines multiple spatial layers with different error protection characteristics into a composite transmission structure. This composite approach allows the system to exploit both the mobility advantage of wireless transmission and the robustness against interference through diversified error protection strategies across different spatial streams.
4Manufacturing precision
If uncompressed UHD video is transmitted, then video fidelity is improved, but bandwidth requirement increases to 12 Gbps
Solution Approach 1:
The patent segments uncompressed UHD video into multiple spatial layers that can be transmitted in parallel. By dividing the high-fidelity video data into spatial components, the system maintains video fidelity while distributing the 12 Gbps bandwidth requirement across multiple lower-rate streams, making the transmission more manageable and enabling QoS management.
Solution Approach 2:
The spatial layering framework provides multi-functionality: it enables both high-fidelity uncompressed video transmission and adaptive compression when bandwidth is limited. The same spatial layer structure can be transmitted with different coding rates, allowing the system to maintain video fidelity when bandwidth permits while adapting to lower bandwidth conditions when necessary.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
A method for transmitting video for a display panel by a transmitter in electronic communication with a receiver over a wireless communication channel. The method includes: receiving, by the transmitter, a data signal from a data source; receiving, by the transmitter, a return signal from the receiver; selecting, by the transmitter based on at least one of channel quality, video quality, codec requirements, or data rate requirements, a profile from among a plurality of profiles each comprising one or more parameters for transmitting the data signal to the receiver, the plurality of profiles comprising one or more profiles corresponding to transmission of uncompressed video data and one or more profiles corresponding to transmission of compressed video data; and transmitting, by the transmitter, the data signal to the receiver according to the selected profile for display on the display panel.