MPD Tile Extension for Adaptive Partial Image Delivery
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
The MPEG-DASH standard only addresses bitrate switching and does not provide a method for selecting or supplying partial images using tile structures, limiting adaptive data delivery of partial images.
Innovation Solution
The extension of the Media Presentation Description (MPD) format to include partial image information, allowing for the adaptive supply of partial images by defining new elements and schema within the MPD, such as the viewpoint and tilegroupID, to manage and deliver tile-based image data efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the MPEG-DASH standard is used for content delivery, then adaptive bitrate streaming is achieved, but partial image selection and adaptive supply cannot be performed
Solution Approach 1:
The image content is divided into multiple independent tile regions, each representing a selectable partial image. The MPD format is segmented to include tile-specific information (tilewidth, tileheight, tile_offset) that enables independent selection and delivery of individual tiles without requiring changes to the overall DASH framework.
Solution Approach 2:
The patent extends the traditional bitrate-dimension adaptability of MPEG-DASH by adding a spatial-dimension adaptability through tile structures. This allows selection based on both quality (bitrate) and spatial scope (partial image regions), creating a two-dimensional adaptation space.
2Loss of energy
If entire image data is delivered to terminals, then complete image content is provided, but data transmission volume increases unnecessarily
Solution Approach 1:
The patent extracts only the necessary tile regions from the complete image data for delivery. By identifying and delivering only the selected partial images (tiles) rather than the entire image, data transmission volume is reduced while maintaining the essential visual information required by the terminal.
Solution Approach 2:
Instead of delivering the complete image (excessive action), the patent delivers only the necessary partial image regions (partial action). This approach transmits sufficient information for the terminal's display needs without the redundancy of unnecessary image data.
3Adaptability or versatility
If tile structure elements are added to MPD format, then partial image selection capability is enabled, but format complexity increases
Solution Approach 1:
The tile structure elements in the MPD format are designed to be multi-functional: they enable partial image selection, support adaptive delivery based on terminal capabilities, and maintain compatibility with existing DASH infrastructure. The same tile information structure serves multiple purposes in the content delivery process.
Solution Approach 2:
The tile structure information (tilewidth, tileheight, tile_offset, tile_group) is pre-defined and embedded in the MPD format during content preparation. This preliminary structuring enables terminals to efficiently select and process partial images without requiring complex runtime analysis or additional processing steps.
Data Source
Figure 1
Figure 2
Figure 3
AI summary
The present disclosure relates to an information processing device and method for adaptively supplying data of partial images. The information processing device includes: a reception unit configured to receive a file that includes a first track storing parameter sets related to an encoded entire image, a second track storing each partial image which is a part of the encoded entire image, and association information associating the first track with the second track; and a decoding unit configured to decode encoded data of the partial image included in the file received by the reception unit. For example, the present disclosure can be applied to an information processing device that performs a process for adaptively supplying image data.