Sound Processing Apparatus for Variable Playback Speed Synchronization
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Solution Overview
Problem
Existing techniques for synchronizing video images with sound struggle to accurately maintain synchronization when the playback speed of the video image varies, leading to deterioration in synchronization accuracy due to difficulties in acquiring precise time information for the sound signal.
Innovation Solution
A sound processing apparatus that includes a reception unit for receiving information with a timecode and playback speed, an acquisition unit for obtaining sample data from a storage unit, and an output unit for associating the playback speed with the sample data, using a time information table to accurately recognize the time of the sound signal and adjust playback speed accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the playback speed of sound is changed to match the playback speed of the video image, then the synchronization between video and sound is improved, but the accuracy of acquiring time information for the sound signal deteriorates
Solution Approach 1:
The sound signal is divided into multiple sample data segments, each associated with specific timecode information. This segmentation allows the system to track time information accurately for each segment even when overall playback speed varies, resolving the contradiction between synchronization and time measurement precision.
Solution Approach 2:
Timecode information acts as an intermediary between the sound signal and the video playback system. By incorporating timecode data into the sound signal structure, the system can maintain accurate time information independently of playback speed variations, enabling precise synchronization without sacrificing time measurement accuracy.
2Adaptability or versatility
If the playback speed of the video image varies, then the adaptability to different video speeds is improved, but the accuracy of synchronization between video image and sound deteriorates
Solution Approach 1:
The system dynamically adjusts the sound signal processing based on the detected playback speed of the video image. By making the timecode and sample data association dynamic rather than static, the system can adapt to varying playback speeds while maintaining synchronization accuracy, resolving the contradiction between adaptability and reliability.
Data Source
AI summary
A sound processing apparatus includes a reception unit configured to receive information including a timecode and a playback speed of video data, an acquisition unit configured to acquire, from a storage unit configured to store a sound signal, sample data obtained by dividing the sound signal, the sample data corresponding to the timecode included in the information received by the reception unit, and an output unit configured to output data obtained by associating the playback speed included in the information received by the reception unit with the sample data acquired by the acquisition unit.