Mixture-of-Experts Video Compression for Inter/Intra Prediction
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Solution Overview
Problem
Existing video compression techniques struggle to effectively combine inter-prediction and intra-prediction modes, leading to suboptimal rate-distortion performance and increased computational complexity.
Innovation Solution
Implementing a mixture of experts (MOE) model that utilizes multiple neural network models for both encoding and decoding, allowing simultaneous use of inter and intra-prediction modes to predict pixel values based on spatial and temporal context, with a gating mechanism to select the most appropriate model for each block.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If multiple neural network models are used for prediction, then rate-distortion performance is improved, but device complexity increases
Solution Approach 1:
The system divides the prediction task into multiple specialized neural network models, each handling different prediction modes (inter-prediction and intra-prediction). Each model is trained separately on specific data distributions, allowing the system to achieve high rate-distortion performance by selecting the appropriate specialized model for each block while managing complexity through modular architecture.
Solution Approach 2:
The system dynamically selects which neural network model to use based on the characteristics of each video block. A gating mechanism determines whether to use inter-prediction models, intra-prediction models, or a combination, allowing the system to adapt its complexity based on the specific requirements of each block rather than always using the most complex model.
2Productivity
If inter-prediction and intra-prediction modes are combined, then compression efficiency is improved, but computational complexity increases
Solution Approach 1:
The system segments the video blocks into different categories based on their characteristics (e.g., temporal coherence vs. spatial coherence) and assigns different prediction models to each segment. This allows efficient combination of inter and intra prediction modes while reducing overall computational complexity by only applying complex predictions where necessary.
Solution Approach 2:
Different prediction modes are applied to different blocks based on their local characteristics. The system evaluates each block and applies the most suitable prediction method (inter-prediction, intra-prediction, or neither) locally, optimizing compression efficiency for each region while managing computational resources by avoiding unnecessary complex operations.
3Device complexity
If a single comprehensive prediction model is used, then device complexity is reduced, but rate-distortion performance deteriorates
Solution Approach 1:
Instead of training one comprehensive model to handle all prediction scenarios, the system segments the prediction task into multiple specialized models. Each model is trained on a specific subset of data with particular characteristics, allowing each to achieve high performance on its designated task while the system as a whole manages complexity through selective application.
Solution Approach 2:
The system changes the approach by transitioning from a single model with fixed parameters to multiple models with different parameter sets optimized for different conditions. By selecting which model to apply based on block characteristics, the system achieves superior rate-distortion performance without requiring all models to be simultaneously active.
Data Source
AI summary
Methods, systems, and apparatus, including computer programs, for compression and decompression of video data using an ensemble of machine learning models. Methods can include defining for each frame in a video, a plurality of blocks in the frame. Methods can further include processing the frames of video in sequential sets, wherein each sequential set is at least a current frame (220) of video and a prior frame (240) of video in the ordered sequence. Each respective prediction of a block in the frame of the video includes providing, as input to a prediction model a first and the second border (235,230) of a current block (225) of the current frame, a first and a second border (250, 255) for a respective current block (245) of the prior frame and the respective current block (245) of the prior frame.


