MXF Video Playback Delay Elimination via Memory Location Analysis
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Solution Overview
Problem
Conventional video recording and playback systems using the MXF standard experience playback delays due to the need to send metadata before video data, causing inefficiencies in file exchange and playback.
Innovation Solution
A video recording and playback system that includes a receiver, analyzer, playback information table, program data memory, and decoder, which analyzes the memory location of video data within an MXF file, memorizes this information, and decodes only the video data based on playback information, allowing for immediate playback without delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If metadata is sent before video data in MXF file playback, then data structure compliance is maintained, but playback delay occurs
Solution Approach 1:
The patent applies preliminary action by analyzing and storing the memory location of video data within the MXF file structure before playback begins. The analysis unit identifies where video data is located in the file, and this information is stored in advance, allowing the playback system to jump directly to video data without waiting for metadata transmission to complete, thus eliminating playback delay while maintaining data structure compliance
Solution Approach 2:
The patent extracts the video data from the MXF file structure using the pre-analyzed memory location information. By taking out only the necessary video data portion based on stored location information, the system bypasses the sequential metadata transmission requirement, achieving immediate playback without compromising the integrity of the overall MXF file structure
2Reliability
If entire MXF file is transmitted for playback, then data integrity is ensured, but transmission time increases
Solution Approach 1:
The analysis unit performs preliminary analysis of the MXF file structure to identify and store the memory location of video data before transmission begins. This advance preparation enables the transmission unit to send only the necessary video data portion rather than the entire file, reducing transmission time while ensuring data integrity through precise location-based extraction
Solution Approach 2:
The system extracts and transmits only the video data portion from the MXF file based on pre-analyzed memory location information. This selective extraction maintains data integrity by ensuring the correct video data is transmitted while significantly reducing the total transmission time compared to sending the entire file
3Reliability
If video data location is not pre-analyzed, then file structure is preserved, but playback efficiency decreases
Solution Approach 1:
The analysis unit performs preliminary analysis of the MXF file structure to identify and store the memory location of video data before playback begins. This advance preparation maintains the integrity of the original file structure while enabling efficient direct access to video data during playback, significantly improving playback efficiency without altering the file structure
Solution Approach 2:
The patent introduces an intermediary playback information table that stores the analyzed memory location of video data. This intermediary structure acts as a bridge between the original MXF file structure and the playback process, preserving the file structure integrity while enabling efficient video data retrieval and playback through pre-stored location information
Data Source
AI summary
A video recording and playback equipment which plays video data of a program memorized in an MXF file without playback delay is provided. It has a receiver, an analyzer, a playback information table, a program data memory and a decoder. The receiver receives the MXF file which includes the video data and metadata including information about an identification tag to identify the video data and data size of the video data. The analyzer judges whether the data contained in the file is the video data. If it is the video data, the analyzer analyzes a memory location where the video data is memorized in the file and memorize it on the playback information table as playback information, and also memorize the file to the program data memory. Only the video data is played by the decoder from the file based on the playback information.