Audio Synchronization in Slow Motion Video Playback
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional portable computing devices struggle with misaligned or poor audio synchronization during slow motion video playback, leading to a poor user experience due to the inability to effectively coordinate audio with video in slow motion recordings.
Innovation Solution
A system that processes audio recorded with high-frame-rate video to distinguish between perceivable and non-perceivable audio segments, playing perceivable audio at reduced speed and non-perceivable audio at regular speed to maintain intelligibility, using a neural network to filter audio streams and synchronize them with video frames.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If audio playback speed is decreased to match slow motion video playback, then audio synchronization with video is improved, but audio intelligibility deteriorates
Solution Approach 1:
The audio stream is segmented into multiple audio segments corresponding to different video frame ranges. Each audio segment is independently processed and played back at appropriate speeds to maintain both synchronization and intelligibility. This allows different portions of audio to be played at different speeds rather than uniformly slowing down the entire audio stream.
Solution Approach 2:
The audio playback system dynamically adjusts playback speed based on the specific audio segment and its correspondence to video frames. Rather than using a fixed playback speed ratio, the system varies the playback characteristics of different audio segments to optimize both synchronization with slow-motion video and maintainability of audio quality and intelligibility.
2Device complexity
If conventional audio playback methods are used with slow motion video, then device complexity is reduced, but audio-video synchronization quality deteriorates
Solution Approach 1:
Audio segments are pre-processed and tagged during recording with metadata indicating their correspondence to specific video frame ranges and optimal playback characteristics. This preliminary organization of audio data enables efficient playback synchronization without requiring complex real-time processing during video playback, thus maintaining reasonable device complexity while achieving reliable synchronization.
Data Source
AI summary
A device includes a memory configured to store data corresponding to a media stream including video recorded at a first frame rate and multiple audio segments includes the multiple audio segments include one or more first audio segments indicated as having a first playback type and one or more second audio segments indicated as having a second playback type includes the device also includes one or more processors coupled to the memory and operably configured to initiate playback of the media stream includes the playback of the media stream includes playback of the video at a second frame rate that is different from the first frame rate, playback of the one or more first audio segments at a first playback speed corresponding to the first frame rate, and playback of the one or more second audio segments at a second playback speed corresponding to the second frame rate.