Video Decoding Toolset Extraction for Bitstream Processing
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Solution Overview
Problem
Current video coding technologies face challenges in efficiently decoding video streams without parsing the entire file, particularly in determining the required decoding tools for bitstreams conforming to standards like Essential Video Coding (EVC) within the ISO Base Media File Format (ISOBMFF).
Innovation Solution
Incorporating a toolset indication syntax element in the configuration record that identifies the necessary video decoding tools, allowing devices to determine if they can decode a file without parsing the majority of it, and using MIME type parameters to specify the required tools for decoding.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a device parses the entire video file to determine required decoding tools, then complete information about decoding requirements is obtained, but processing time and computational resources are excessively consumed
Solution Approach 1:
The patent extracts the toolset indication syntax element from the configuration record, which is itself extracted from the video bitstream. This element contains only the necessary information about required decoding tools, separating it from the rest of the video data. The device retrieves only this specific extracted information rather than parsing the entire file, thus obtaining complete tool information while minimizing processing time.
Solution Approach 2:
The toolset indication syntax element is prepared in advance during video encoding and stored in the configuration record before the video is played back. This preliminary preparation allows the decoding device to quickly obtain tool requirements without performing extensive analysis during playback, resolving the contradiction between complete information acquisition and processing time.
2Reliability
If a device retrieves and processes the entire video bitstream to identify required tools, then accurate decoding capability determination is achieved, but device complexity and processing overhead increase
Solution Approach 1:
The patent extracts the toolset indication syntax element from the configuration record, which contains precise information about required decoding tools. This extracted element provides accurate decoding capability determination without requiring the device to process the entire complex bitstream structure, thus maintaining reliability while reducing processing complexity.
Solution Approach 2:
Instead of processing the entire video bitstream (excessive action), the patent processes only the necessary toolset indication syntax element (partial action). This partial processing approach is sufficient to determine decoding capabilities accurately without the overhead of analyzing the complete bitstream, resolving the contradiction between reliability and device complexity.
3Productivity
If video decoding tools are not properly identified before retrieval, then decoding efficiency is improved by avoiding unnecessary processing, but incorrect tools may be selected leading to decoding failures
Solution Approach 1:
The patent performs preliminary identification of required decoding tools by extracting and analyzing the toolset indication syntax element from the configuration record before retrieving the video bitstream. This preliminary action ensures that the correct tools are selected in advance, guaranteeing decoding success while avoiding unnecessary processing of incompatible formats, thus resolving the contradiction between efficiency and reliability.
Solution Approach 2:
The toolset indication syntax element provides feedback information about the required decoding tools, allowing the device to verify compatibility before full retrieval and processing. This feedback mechanism ensures that only appropriate video streams are processed with the available tools, maintaining both high efficiency and reliability by preventing futile decoding attempts.
Data Source
AI summary
A device for processing video data can be configured to receive a configuration record for decoding a bitstream of the video data, wherein the configuration record for the bitstream includes a toolset indication syntax element that includes information identifying, from a set of video decoding tools, tools that are required to decode the bitstream associated with the configuration record; based on the toolset indication syntax element, determine whether to retrieve the bitstream associated with the configuration record; and based on the determination to retrieve the bitstream associated with the configuration record, retrieve the bitstream and outputting the bitstream to a video decoder for decoding.