Joint Source-Channel Coding for Incorrect Decoding Detection
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Solution Overview
Problem
Separate source channel coding (SSCC) systems face challenges in accurately determining incorrect decoding results, leading to reduced system performance due to the inability to fully utilize the advantages of source and channel coding.
Innovation Solution
The implementation of a joint source and channel coding (JSCC) scheme, where source encoding is combined with channel encoding to create a fourth bit sequence, allowing for joint decoding at the receive end to accurately determine incorrect decoding results and increase detection probability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If separate source channel coding (SSCC) is used, then the design is simple and universality is good, but the ability to accurately determine incorrect decoding results is poor
Solution Approach 1:
The patent combines source coding and channel coding into a unified joint source and channel coding (JSCC) scheme. The encoder integrates both source encoding and channel encoding functions, while the decoder performs joint decoding that simultaneously handles both coding types. This merging allows the system to accurately determine incorrect decoding results by leveraging the complementary information from both coding schemes, resolving the contradiction between design simplicity and decoding accuracy.
2Ease of operation
If separate source channel coding (SSCC) is used, then implementation is straightforward, but system performance is reduced
Solution Approach 1:
The patent merges source coding and channel coding into a unified JSCC framework that maintains implementation feasibility while significantly improving system performance. The joint encoder and joint decoder are designed to work together seamlessly, allowing the system to fully utilize the advantages of both source and channel coding, thereby enhancing overall productivity and system performance without sacrificing ease of operation.
Solution Approach 2:
The patent creates a composite coding scheme that combines the properties of source coding and channel coding into a unified structure. This composite approach allows the system to leverage the error correction capabilities of channel coding while simultaneously exploiting the compression efficiency of source coding, resulting in superior system performance compared to separate coding approaches.
3Reliability
If joint source and channel coding (JSCC) is implemented, then incorrect decoding results can be accurately determined and detection probability increased, but the coding scheme complexity increases
Solution Approach 1:
The patent segments the joint decoding process into distinct functional stages that can be implemented systematically. The joint decoder is structured to process received signals through a series of ordered operations that combine source and channel decoding functions in a manageable sequence, reducing the perceived complexity while maintaining the accuracy benefits of JSCC.
Data Source
AI summary
This application provides a communication method and apparatus. The method includes: performing source encoding on a first bit sequence to obtain a second bit sequence; obtaining a fourth bit sequence based on the second bit sequence and a third bit sequence; performing channel encoding on the fourth bit sequence to obtain a fifth bit sequence; and sending the fifth bit sequence. The third bit sequence is C bits in the first bit sequence, the fourth bit sequence includes one or more information bits and one or more frozen bits, the second bit sequence is located on B information bit locations in the fourth bit sequence, the third bit sequence is located on a first bit location in the fourth bit sequence, the first bit location includes E information bit locations and F frozen bit locations, E+F=C, E is an integer and E≥0, and F is an integer greater and F≥0.