Adaptive LDPC Coding Rates for Multimedia Transmission Reliability
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Solution Overview
Problem
Existing multimedia communication technologies face challenges in ensuring the transmission reliability of high-priority multimedia data while efficiently utilizing transmission resources, especially when using a single coding matrix for diverse multimedia data.
Innovation Solution
The proposed solution involves a sending apparatus and a receiving apparatus that determine a low-density parity-check (LDPC) matrix based on the quantity of transmission bits, allowing for adaptive coding rates ranging from 5/6 to 1/2, thereby optimizing data transmission reliability and resource usage for different priority levels of multimedia data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a same coding matrix is used for all multimedia data, then device complexity is reduced, but transmission reliability of high-priority data deteriorates
Solution Approach 1:
The patent implements dynamic selection of coding matrices based on data priority. The receiving device determines which coding matrix was used by the sending device according to the quantity of transmission bits, and different decoding methods are applied accordingly. This dynamic adaptation allows the system to optimize transmission reliability for high-priority data while maintaining manageable device complexity through standardized selection criteria.
Solution Approach 2:
The patent changes the parameter of coding matrix selection based on the quantity of transmission bits. By establishing a correspondence between transmission bit quantity and coding rate, the system selects appropriate coding matrices dynamically. This parameter-based selection mechanism resolves the contradiction by allowing flexibility in reliability optimization without requiring complex manual configuration.
2Reliability
If a low coding rate is used, then transmission reliability is improved, but transmission resource overheads increase
Solution Approach 1:
The patent applies different coding rates to different portions of data based on priority. High-priority multimedia data uses lower coding rates (higher reliability) while low-priority data uses higher coding rates (lower overhead). This local differentiation of coding quality resolves the contradiction by optimizing reliability only where necessary rather than applying uniform low coding rates to all data.
Solution Approach 2:
The system dynamically adjusts coding rate selection based on the quantity of transmission bits and data priority requirements. By establishing a correspondence relationship between transmission bit quantity and coding rate, the system can adaptively choose appropriate coding matrices, ensuring high reliability for critical data while minimizing resource overhead for less critical data.
Data Source
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AI summary
This application provides an encoding and decoding method and an apparatus. In the method, a sending apparatus determines a first low-density parity-check matrix based on a quantity of first transmission bits, encodes information bits based on the first low-density parity-check matrix, to obtain the first transmission bits, and then sends the first transmission bits. Because the first LDPC matrix is determined based on the quantity of the first transmission bits, different quantities of the first transmission bits correspond to different coding rates of the first LDPC matrix. The sending apparatus can flexibly match different coding rates for different quantities of transmission bits, thereby improving data transmission reliability and saving data transmission resources.