Phase Coherent Audio Clip Stretching on Editing Timeline
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Traditional audio editing techniques fail to maintain phase coherence when stretching audio clips on an editing timeline, leading to desynchronization with video clips, requiring additional manual adjustments that are time-consuming and error-prone.
Innovation Solution
A method and apparatus for phase coherent stretching of audio clips, where a selection of clips is treated as a single entity with a single start and end time, allowing for synchronized stretching by repositioning the clip head or tail relative to the timeline, ensuring that all selected audio clips remain synchronized during expansion or compression.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional editing techniques are used to stretch audio clips with different start times and end times, then the stretching operation can be performed, but the clips shift out of relative time causing audio to lead or lag behind video, requiring additional manual repositioning steps
Solution Approach 1:
The patent merges multiple selected audio clips into a single grouped entity for the purpose of stretching operations. By treating the selection as one unit with collective start and end times, the system applies the stretch ratio uniformly across all clips while maintaining their internal time relationships, thus preserving phase coherence without requiring manual repositioning of individual clips.
Solution Approach 2:
The patent implements dynamic repositioning of clip heads and tails during the stretching operation. Instead of keeping start times static as in traditional techniques, the system dynamically adjusts both the clip head and clip tail positions based on the stretch ratio, ensuring that all clips in the selection remain synchronized with video and each other throughout the stretching process.
2Ease of operation
If traditional editing techniques are used, then individual clips can be stretched, but additional manual steps are required to reposition clips to maintain synchronization, increasing time consumption and error risk
Solution Approach 1:
The patent enables the system to automatically maintain phase coherence during stretching without requiring manual intervention. The automatic repositioning of clip heads and tails based on the stretch ratio allows the system to service itself, preserving synchronization without user involvement in the repositioning process, thus eliminating time loss and error risks associated with manual adjustments.
3Device complexity
If start times of selected clips are kept static during stretching, then the stretching calculation is simplified, but the clips shift out of relative time from each other causing desynchronization
Solution Approach 1:
The patent transitions from static start time positioning to dynamic repositioning of both clip heads and tails. During stretching, the system calculates new positions for each clip's boundaries based on the stretch ratio, allowing the clips to maintain their synchronized relationships. This dynamic approach increases calculation complexity but ensures high synchronization accuracy, resolving the contradiction between simplicity and precision.
Data Source
AI summary
Embodiments of the present invention generally relate to a method and apparatus for phase coherent stretching of audio clips on an editing timeline. The method comprising receiving a selection of a plurality of audio clips for stretching; determining a stretch ratio for the selection of audio clips based on a selection and repositioning one of a clip head or a clip tail of a selected one of the audio clips for stretching; and stretching each audio clip of the selection of audio clips by the stretch ratio, wherein during stretching, each selected audio clip remains synchronized with all other audio clips selected for stretching, by repositioning both of the clip head and the clip tail of each selected audio clip relative to the editing timeline, except for one clip head or clip tail which is not repositioned.