Video Frame Partitioning Across Multiple Channels
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Solution Overview
Problem
Existing wireless video transmission systems face challenges in achieving robustness due to constraints in communication path capacity, leading to potential corruption of video information during transmission, especially when packets are not distributed across distinct paths.
Innovation Solution
The method involves partitioning spatially correlated pixels of a video frame into the same number of partitions as available communication channels, with each partition transmitted on a distinct channel, adapting to channel conditions such as capacity and signal quality, and dynamically adjusting block size and shape based on the number of channels to maximize diversity and error concealment.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If packets are transmitted on a single communication path, then transmission simplicity is maintained, but robustness against packet corruption deteriorates
Solution Approach 1:
The video frame is segmented into multiple partitions, with each partition containing spatially correlated pixels. Each partition is then transmitted on a distinct communication channel, so that if one channel fails, other channels can provide redundant information for error concealment.
2Reliability
If packets are distributed over multiple communication paths, then robustness against packet corruption is improved, but path capacity constraints limit the number of available paths
Solution Approach 1:
The invention transitions from relying solely on spatial distribution of packets to utilizing the temporal dimension by employing time-division multiplexing. Multiple partitions are transmitted over the same communication channel at different time slots, creating temporal diversity that complements spatial diversity and provides robustness even when the number of simultaneous paths is limited.
3Reliability
If more communication channels are used for partition transmission, then diversity and error concealment improve, but information overhead increases
Solution Approach 1:
The system dynamically adjusts the number of partitions and their distribution across channels based on the available communication resources and channel conditions. This adaptive parameter adjustment allows the system to optimize the balance between diversity gain and information overhead, using more partitions when channel capacity allows and fewer when resources are constrained.
Data Source
AI summary
A method of transmitting a video frame over a plurality of communication channels involves selecting a number of communication channels available between the transmitting and the receiving devices; partitioning spatially correlated pixels of the video frame into a number of different partitions equal to the number of selected communication channels; and transmitting the different partitions, where each partition is transmitted on a distinct communication channel among the selected communication channels.Such a method is suitable for use in a communication system, especially a wireless communication system, in which data of a channel can be lost or corrupted. The method can maximize diversity in the transport of the video frame pixels and improve robustness.