Multimedia Header Directory for Error Resilient Decoding
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Solution Overview
Problem
Current multimedia data transmission over error-prone networks, such as heterogeneous IP networks and mobile/wireless channels, faces challenges with packet error resilience due to factors like multi-path fading, noise, and bandwidth variations, leading to decoding artifacts and data loss, as existing encoding measures struggle to accurately identify and correct bit errors without compromising data quality.
Innovation Solution
A method and apparatus that generate and transmit a directory containing header information associated with multimedia data, allowing decoders to recover from errors by locating and replacing lost or erroneous header information, thereby improving packet error resiliency and maintaining data quality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If channel coding (e.g., Reed-Solomon coding) is used to improve robustness, then error protection is enhanced, but the system cannot accurately identify and correct bit errors without special design support for error position identification
Solution Approach 1:
The patent introduces an intermediary mechanism (directory structure with out-of-band information) that mediates between the channel coding layer and the error detection layer. This directory contains metadata about packet structure, error locations, and correction information, enabling the system to identify and correct bit errors without requiring complex special design support in the channel coding itself.
2Reliability
If source coding techniques (e.g., reversible variable length coding) are used for error recovery, then decoding can proceed in reverse order, but coding efficiency is compromised and quality of decoded video decreases
Solution Approach 1:
The patent applies preliminary action by pre-generating and transmitting a directory structure containing header information and error correction data before the actual video data is transmitted. This directory enables the receiver to efficiently locate and correct errors without needing to re-transmit or re-decode large portions of the video stream, thus maintaining high coding efficiency while providing robust error recovery.
3Reliability
If resynchronization points are used in the bitstream to handle errors, then decoding can resume after errors, but a sizeable amount of potentially healthy data must be skipped
Solution Approach 1:
The patent extracts critical header information and error correction data into a separate directory structure transmitted out-of-band. This extracted information allows the receiver to precisely identify error locations and correct them without skipping through large portions of the bitstream, thereby minimizing data loss while maintaining reliable error handling.
4Reliability
If incorrect codeword emulation is used to handle bitstream corruption, then decoding can continue, but incorrect values for compression parameters lead to incorrect bitstream interpretation
Solution Approach 1:
The patent implements feedback mechanisms through the directory structure that provides real-time information about packet errors, correction status, and bitstream integrity. This feedback allows the receiver to adjust decoding parameters dynamically, ensuring continuous decoding operation while maintaining high accuracy in bitstream interpretation by correcting incorrect codeword emulation in real-time.
Data Source
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AI summary
A method and apparatus to improve error resiliency in processing a multimedia bitstream is described. A directory of header information is generated for a multimedia bitstream. The directory information comprises packet header information associated with the multimedia bitstream. The directory information may be transmitted to a receiver along with the multimedia bitstream. A receiver of the multimedia bitstream and the directory can utilize the header information to identify and locate packets within and subsequent to erroneous data in the received bitstream. By identifying and locating packets that may otherwise be discarded, the receiver may be able to improve error recovery and decoding of the multimedia data.