DVC HARQ Prioritization for Fixed-Latency Video Frames
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Solution Overview
Problem
Conventional HARQ mechanisms in wireless communication systems are less suited for video applications due to uncertain latency, which poses a tight latency constraint, and prediction quality imbalances in distributed video coding (DVC) lead to inefficiencies in resource utilization and video quality.
Innovation Solution
Implementing HARQ procedures for DVC with a frame/region interleaver and optimized channel coding to maintain fixed HARQ latency while addressing prediction quality imbalances, enhancing video quality through prioritized transmission and retransmission of groups based on priority.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional HARQ mechanisms are used in wireless communication systems, then the system can support multiple users by sharing resources, but the latency becomes uncertain which violates the tight latency constraint required for video applications
Solution Approach 1:
The video frame is divided into multiple groups (e.g., first group and second group) with different priorities. The first group containing critical data is transmitted with higher priority in the first slot, while the second group is transmitted in subsequent slots. This segmentation allows critical video data to be delivered within strict latency constraints while non-critical data uses standard HARQ procedures.
2Use of energy by moving object
If distributed video coding is used to reduce computational power and memory consumption, then resource utilization improves, but prediction quality imbalances occur leading to reduced video quality
Solution Approach 1:
Different priority levels are assigned to different groups of video data based on their importance and prediction quality requirements. The first group with higher priority (better prediction quality) is transmitted separately from the second group with lower priority. This allows the system to maintain low computational complexity while ensuring that critical video regions receive adequate prediction quality.
Data Source
AI summary
Method and apparatus for HARQ procedures for DVC. The apparatus sorts one or more bits of a payload based on a corresponding priority. The apparatus divides the payload into one or more groups based on the corresponding priority, where each of the one or more groups is encoded separately. The apparatus transmits, to a second wireless device, a video frame over a span of one or more slots based at least on a prioritized transmission of the one or more groups.