Segmented Media Information Files for HTTP Streaming
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Solution Overview
Problem
HTTP streaming methods face initial transmission delays and hinder random access and trick mode playback due to large media information files and inefficient segment management, particularly in mobile communication terminals where multimedia content is divided into numerous segments with varying bit rates and resolutions, leading to prolonged download times and increased storage requirements.
Innovation Solution
The method involves dividing multimedia content into segments and further grouping them into subgroups, creating meta and sub-media information files that allow for efficient transmission by selecting and transmitting only the necessary sub-media information files and corresponding segments based on playback requests, reducing the initial transmission delay and enabling random access and trick mode playback.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multimedia content is divided into a large number of segments for HTTP streaming, then the streaming service can be provided with multiple bit rates and resolutions, but the initial transmission delay increases and storage requirements increase
Solution Approach 1:
The patent divides the media information file into multiple segments, where each segment corresponds to a specific time period and contains URL information for that period. This segmentation allows the system to provide multiple bit rates and resolutions while reducing initial transmission delay by only transmitting the segments needed for the requested playback period, rather than transmitting information for the entire multimedia content.
Solution Approach 2:
The patent introduces a time period dimension by organizing media information into segments corresponding to different time periods. This allows the system to manage large volumes of media information efficiently by enabling selective transmission based on playback requirements, thus reducing initial transmission delay while maintaining adaptability for multiple bit rates and resolutions.
2Adaptability or versatility
If multimedia content is divided into a large number of segments for HTTP streaming, then the streaming service can be provided with multiple bit rates and resolutions, but storage requirements increase
Solution Approach 1:
The patent segments the media information file into multiple smaller segments organized by time periods. This segmentation reduces storage requirements by enabling selective storage and transmission of only the segments needed for specific playback periods, rather than storing and transmitting information for the entire multimedia content at all bit rates and resolutions.
Solution Approach 2:
The patent implements partial action by transmitting only the media information segments that are necessary for the requested playback period, rather than transmitting all segments for the entire multimedia content. This reduces storage requirements while maintaining the capability to provide multiple bit rates and resolutions when needed.
3Reliability
If all media information files are transmitted initially, then complete information is available for playback, but initial transmission delay increases
Solution Approach 1:
The patent prepares media information in advance by segmenting it into time-period-based segments and organizing them in a structured format. This preliminary organization enables the system to quickly retrieve and transmit only the specific segments needed for the requested playback period, ensuring complete information availability for that period while minimizing initial transmission delay.
Solution Approach 2:
The patent extracts and transmits only the specific media information segments that correspond to the requested playback period, rather than transmitting all media information segments initially. This extraction approach maintains reliability by ensuring complete information is available for the requested period while significantly reducing initial transmission delay.
4Loss of time
If media information files are optimized for fast transmission, then initial transmission delay is reduced, but random access and trick mode playback become difficult
Solution Approach 1:
The patent segments media information into time-period-based units, where each segment contains complete URL information for a specific time period. This segmentation enables fast transmission by allowing selective transmission of only needed segments, while simultaneously enabling random access and trick mode playback by allowing the system to retrieve any specific time period segment independently without requiring sequential access.
Data Source
AI summary
Disclosed are methods of transmitting and receiving media information file for HTTP stream. Content is divided into segments, the segments are divided into segment sub groups, each of the divided segments grouping the segment sub groups, a meta media information file including information on a segment sub group is configured; and sub media information file including information on segments in a segment sub group is configured. When service initializes, the meta media information file is transmitted. When a transmission request for content is received, the sub media information file to which a playback request timing for content belongs is selected and transmitted by referring to the meta media information file, and then, a segment in a segment sub group corresponding to the sub media information file is transmitted. Thus, during HTTP streaming, initial transmission delay is reduced, and random access and trick mode playback are possible.