Temporal Sub-Sampling for UWB Video Throughput Reduction
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Solution Overview
Problem
Current ultra-wideband (UWB) wireless systems face challenges in efficiently transmitting video content over radio frequency links due to high data throughput requirements, which can lead to buffer overflow and increased bandwidth usage.
Innovation Solution
Implementing a temporal sub-sampling routine with both fixed and automatic mechanisms to discard or buffer frames based on available buffer capacity, and a tile copying mechanism that compares and transfers only changed tiles, reducing the data transmitted over the RF link.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If video content is transmitted over UWB RF link, then video delivery is enabled, but high throughput requirements cause buffer overflow and increased bandwidth usage
Solution Approach 1:
The patent divides video content into individual frames and further segments frames into tiles. This segmentation allows selective transmission of only necessary portions (changed tiles) rather than transmitting complete frames, thereby reducing overall data throughput while maintaining video delivery capability.
Solution Approach 2:
The patent extracts and transmits only the changed portions (delta tiles) between consecutive frames rather than transmitting entire frames. This extraction approach significantly reduces the quantity of transmitted data while preserving essential video information for reconstruction at the receiver.
2Reliability
If all frames are transmitted to maintain video quality, then video completeness is preserved, but buffer overflow occurs due to high data volume
Solution Approach 1:
The patent transmits only the necessary partial information (changed tiles) rather than complete frames. The receiver reconstructs full frames by combining transmitted delta tiles with previously displayed frame data, achieving full video quality reconstruction with reduced data volume that prevents buffer overflow.
3Quantity of substance
If temporal sub-sampling is applied to reduce throughput, then bandwidth usage decreases, but frame discard may affect video quality
Solution Approach 1:
The patent applies different treatment to different regions of video content by identifying and transmitting only changed tiles within frames. Static regions are not re-transmitted while dynamic regions are transmitted at full quality, achieving bandwidth reduction without compromising overall video quality perception.
4Quantity of substance
If tile copying mechanism is used to transmit only changed tiles, then data transmission is reduced, but system complexity increases
Solution Approach 1:
The patent performs preliminary comparison and identification of changed tiles at the transmitter before transmission. This preliminary action enables the receiver to simply copy and combine tiles without complex analysis, shifting processing complexity to the transmitter where it can be optimized and managed more effectively.
Data Source
AI summary
A system, method and computer-readable medium for reducing the required throughput in an ultra-wideband system is provided. A temporal sub-sampling routine limits the number of frames, or portions thereof, to be transmitted to a sink over an RF link. The temporal sub-sampling routine may have a fixed, or static, sub-sampling rate that specifies the rate at which frames are discarded. In accordance with another embodiment, an automatic temporal sub-sampling mechanism is provided. Additionally, a tile copying mechanism may be implemented for reducing the throughput of the RF link. A WDV subsystem may include an interface to an external frame buffer that facilitates the temporal sub-sampling and tile copy routines disclosed herein.