Video Bitstream Mapping for Substitute Image Regions
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Solution Overview
Problem
Existing video coding systems face challenges in efficiently managing and encoding substitute image regions within video bitstreams, particularly in formats like ISO base media file format (ISOBMFF), which lack standardized methods for indicating and locating such regions, leading to inefficiencies in storage and transmission.
Innovation Solution
The proposed solution involves indicating a video bitstream format that allows for substitute image regions, using specific boxes, flags, and mapping information to locate these regions within the bitstream, ensuring compliance with the format, and enabling the inclusion of substitute image regions when no other regions are available.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If substitute image regions are added to video bitstream to improve flexibility and storage efficiency, then adaptability and storage efficiency are improved, but device complexity and difficulty of detecting and measuring increase
Solution Approach 1:
The video picture is divided into multiple image regions, each with its own substitute image region. This segmentation allows the system to manage complexity by treating each region independently while maintaining overall flexibility. The picture is partitioned into regions that can be individually encoded, stored, and managed through the bitstream format.
Solution Approach 2:
The substitute image region information is nested within the existing video bitstream structure. The mapping information and region indicators are embedded as additional data elements within the standard bitstream format, allowing the system to add functionality without creating a completely separate structure. This nesting approach integrates the new features into the existing framework.
2Quantity of substance
If substitute image regions are included in video bitstream to improve storage efficiency, then storage efficiency is improved, but difficulty of detecting and measuring increases
Solution Approach 1:
Mapping information is prepared and embedded in advance within the video bitstream format. The mapping data, which contains location and dimension information for substitute image regions, is pre-calculated and stored as part of the bitstream structure. This preliminary preparation allows decoders to efficiently locate and process substitute regions without requiring complex real-time analysis.
Solution Approach 2:
Mapping information serves as an intermediary between the encoded video data and the decode process. This mapping data acts as a guide that translates the compressed bitstream back into the spatial organization of the original picture, enabling the decoder to accurately locate substitute image regions without directly analyzing the complex encoded data structure.
3Ease of manufacture
If standardized methods for indicating substitute image regions are implemented, then ease of manufacture and format compliance are improved, but device complexity increases
Solution Approach 1:
The video bitstream format is designed with universal structures that can accommodate multiple types of image regions and substitute regions through a unified syntax. The same bitstream format and decoding procedures handle both standard and substitute regions, eliminating the need for separate processing paths and reducing overall system complexity despite the enhanced functionality.
Data Source
AI summary
The embodiments relate to a method comprising indicating a video bitstream format wherein one or more image regions are allowed in a picture of a video bitstream (710); indicating at least a first substitute image region (720); indicating mapping information to locate the first substitute image region in the picture; wherein a first video bitstream comprising the first substitute image region at a location according to the mapping information conforms to the video bitstream format (730). The embodiments also concern a method at a receiver, and technical equipment for implementing the methods.