Adaptive Video Frame Seeking via Dynamic Rate Adjustment
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Solution Overview
Problem
Existing video frame seeking processes in data processing devices are unreliable and time-consuming, as they often resume the video sequence from a frame in the temporal past, leading to prolonged processing times and inaccurate seeking.
Innovation Solution
A method that initiates seeking of a desired video frame by decoding frames from the closest frame in the temporal past and rendering them at a lower frame rate after a predeterminable threshold time period if the desired frame is not decoded within that time, ensuring accurate and efficient seeking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If decoding starts from the closest frame in temporal past to ensure accurate seeking, then seeking accuracy is improved, but the time required for the seek process increases
Solution Approach 1:
The patent applies dynamics by making the frame rate adaptive rather than static. The system dynamically adjusts the frame rate based on whether the desired frame has been decoded. Initially, frames are rendered at a lower frame rate to speed up the seek process. Once the desired frame is decoded, the system transitions to rendering at the original higher frame rate, thus optimizing both seeking speed and video playback quality.
Solution Approach 2:
The patent changes the frame rate parameter adaptively during the seek process. By lowering the frame rate parameter during the initial decoding phase, the system reduces processing time. After the desired frame is found, the frame rate parameter is restored to its original value, ensuring accurate video playback. This parameter change strategy resolves the contradiction between seeking speed and accuracy.
2Reliability
If all frames are rendered at full frame rate during seeking, then video quality is maintained, but the seek process becomes slower
Solution Approach 1:
The system dynamically adjusts rendering behavior based on the seek state. During the active seek phase, frames are rendered at a lower frame rate to improve seeking speed. Once the seek is complete and the desired frame is decoded, the system transitions to full frame rate rendering to maintain video quality. This dynamic adaptation resolves the contradiction between seeking speed and video quality.
Solution Approach 2:
The patent implements periodic action by alternating between two rendering modes: lower frame rate during seeking and full frame rate during normal playback. This periodic switching optimizes performance for each phase - faster rendering during seek operations and higher quality during video playback - thereby resolving the contradiction between productivity and reliability.
3Measurement precision
If the video sequence resumes from a frame in temporal past, then the desired frame can be reached, but the process is unreliable and time-consuming
Solution Approach 1:
The patent implements feedback by continuously monitoring whether the desired frame has been decoded during the seek process. Based on this feedback, the system adjusts the rendering frame rate. When the desired frame is detected, the system switches from lower frame rate rendering to full frame rate rendering. This feedback mechanism makes the seek process more reliable by adaptively responding to the actual decoding progress.
Solution Approach 2:
The system performs self-service by automatically adjusting its own rendering parameters based on the seek progress. The multimedia application monitors the decoding status and autonomously changes the frame rate without requiring external intervention. This self-adjusting behavior improves reliability by ensuring the system optimizes its own performance based on real-time conditions.
Data Source
AI summary
A method includes initiating, through an interface of a multimedia application executing on a data processing device, seeking of a desired frame of a video sequence rendered thereon. The desired frame corresponds to a desired point in time. The method also includes causing, through a set of instructions associated with a processor of the data processing device and/or an operating system executing thereon, the processor to decode frames of the video sequence from a closest frame in a temporal past relative to the desired frame following the initiation. Further, the method includes rendering, through the processor and on the interface, frames of the video sequence after a predeterminable threshold time period at a lower frame rate than a frame rate of the video sequence otherwise at least until the desired frame is decoded and rendered when the desired frame is not decoded within the predeterminable threshold time period.