Communication Apparatus Synchronization via Position Feedback
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Solution Overview
Problem
Communication apparatuses experience a time difference and reproduction position discrepancy when reproducing content due to the delay between receiving a reproduction instruction and starting to reproduce, leading to misalignment between the reproducing apparatuses.
Innovation Solution
The communication apparatus receives an instruction to reproduce content along with the current reproduction position and start timing of another apparatus, allowing it to synchronize and start reproducing from a subsequent position based on the received information.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the communication apparatus receives a reproduction instruction and then performs reproduction preparation before starting to reproduce the content, then the apparatus can ensure proper content preparation and reproduction, but a time difference occurs between transmission of the reproduction instruction and start of reproducing the content, causing reproduction position misalignment with other apparatuses
Solution Approach 1:
The transmitting apparatus determines the reproduction start position and notifies it to the other communication apparatus in advance before the actual reproduction starts. This preliminary notification allows the receiving apparatus to prepare and start reproduction at the correct position, reducing the time difference and maintaining synchronization between multiple apparatuses.
2Productivity
If the communication apparatus starts to reproduce the content based on the reproduction start position without considering the time difference, then the reproduction can start promptly, but a difference in reproduction position occurs between the communication apparatus and another communication apparatus that continues reproducing the content
Solution Approach 1:
The transmitting apparatus monitors the reproduction status and determines the appropriate reproduction start position based on the time difference that has occurred. This feedback mechanism ensures that the notified reproduction start position accounts for the time delay, allowing the receiving apparatus to start reproduction at the correct position and maintain synchronization with the transmitting apparatus.
Data Source
AI summary
Another communication apparatus reproducing a content stored in an external apparatus transmits an instruction for causing a communication apparatus to obtain the content stored in the external apparatus and reproduce the obtained content. Another communication apparatus also transmits a reproduction start timing of the content and information indicating a reproduction position of the content being reproduced by the another communication apparatus to the communication apparatus. If the received reproduction start timing has come, the communication apparatus starts reproducing the content. In starting to reproduce the content, the communication apparatus reproduces the content from a reproduction position at a subsequent time from the received reproduction position based on the reproduction start timing.