Dynamic Bitrate Control for HMD Video Stability
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Solution Overview
Problem
In half-duplex wireless communication systems, especially in head-mounted displays, the communication environment becomes unstable during communication path search processes, leading to fluctuating round-trip times and potential data loss, making it challenging to maintain high data quality and reduce user discomfort.
Innovation Solution
A communication apparatus and method that estimates the occurrence of communication path search processes by analyzing round-trip communication times and adjusts data size and bitrate accordingly, ensuring stable data transmission and minimizing data loss.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the size of data generated per unit time is increased to improve data quality, then the image quality of displayed video is improved, but the round-trip communication time exceeds the target time causing user discomfort
Solution Approach 1:
The patent implements dynamic adjustment of data generation size based on real-time communication conditions. The determination unit changes the size of data generated per unit time according to the measured round-trip communication time, creating a feedback control system that adapts to varying network conditions rather than using fixed parameters
Solution Approach 2:
The patent establishes a feedback mechanism where the time specification unit measures the actual round-trip communication time, compares it with the target time, and feeds this information back to the determination unit. This closed-loop control enables continuous optimization of data generation size to maintain both quality and timing requirements
2Productivity
If the size of data generated per unit time is increased based on short round-trip time, then communication efficiency is improved, but data loss occurs when communication path search process occurs
Solution Approach 1:
The patent applies preliminary action by detecting communication path search processes before they cause data loss. The occurrence estimation unit identifies when beamforming or path search is occurring and proactively adjusts the data generation size downward in advance, preventing the communication environment from becoming unstable and data from being lost
Solution Approach 2:
The system uses feedback from the occurrence estimation unit regarding communication path search detection to dynamically adjust data generation parameters. When path search is detected, the determination unit reduces data generation size to maintain reliable transmission during these vulnerable periods
Data Source
AI summary
A required time specification unit specifies time it took for a round-trip communication in half-duplex wireless communication. A bitrate determination unit determines a value corresponding to a size of data generated by a video data generation unit per unit time based on the specified time and a given target time regarding the round-trip communication. The search occurrence estimation unit estimates whether or not a communication path search process with an HMD is occurring. The bitrate determination unit changes the determined value so that magnitude of change in the value corresponds to a result of the estimation.