Shared Motion Estimation for Video Transcoding
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Solution Overview
Problem
The high computational complexity of newer video encoding formats, such as AV1, poses a challenge for existing servers and edge devices, which struggle to support these formats due to resource limitations, leading to delayed adoption and inefficient transcoding processes.
Innovation Solution
Implementing a system that shares motion estimation and mode decision processing results across different codecs, allowing for reduced computational requirements and facilitating the deployment of multiple video encoding formats by using a common motion estimation block and mode decision block, with optional mapping modules to adapt outputs to compatible formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If newer video encoding formats (e.g., AV1) are implemented, then video compression efficiency and quality are improved, but computational complexity and processing requirements increase significantly
Solution Approach 1:
The patent segments the video encoding process into distinct functional blocks: motion estimation block, mode decision block, and codec-specific encoding blocks. This segmentation allows the computationally intensive motion estimation and mode decision to be performed once and shared across multiple codec outputs, reducing overall computational complexity while maintaining encoding quality.
Solution Approach 2:
The patent implements a universal motion estimation block and mode decision block that serve multiple codec formats simultaneously. These blocks perform motion estimation and mode decision for the input video once, and their results are reused across different codec encoding processes (e.g., AV1, VP9, H.264), making the system multi-functional and reducing redundant computations.
2Adaptability or versatility
If multiple video encoding formats are supported simultaneously, then system versatility and adaptability are improved, but processing time and resource consumption increase
Solution Approach 1:
The patent performs motion estimation and mode decision as preliminary actions before the actual codec-specific encoding. By completing these computationally intensive tasks once and storing their results, the system prepares reusable data that can be quickly applied to multiple codec formats, significantly reducing the time required for transcoding to different formats.
Solution Approach 2:
The patent merges the motion estimation and mode decision functions into shared blocks that serve all codec formats. Instead of having separate motion estimation and mode decision blocks for each codec, the system combines these functions into universal blocks whose outputs are combined and reused across multiple encoding pipelines, improving productivity while maintaining multi-format support.
Data Source
AI summary
A method for sharing the motion estimation and mode decision results and decisions of one codec with another codec is disclosed. A video is received to be transcoded into a plurality of different output encodings of a plurality of different codecs. Each codec has a different video encoding format. A shared motion estimation and a shared mode decision processing of the video are performed. One or more results of the shared mode decision processing shared across the plurality of different codecs are used to encode the video into the plurality of different output encodings of the plurality of different codecs.