Reed-Solomon Encoder for ATSC M/H Signal Compatibility
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Solution Overview
Problem
Existing legacy Reed-Solomon (RS) encoders do not efficiently process ATSC M/H signals, leading to poor operational efficiency and increased costs, as they are not designed to handle the additional encoding scheme required for mobile and handheld device broadcasting while maintaining compatibility with legacy standards.
Innovation Solution
A method and apparatus that includes a systematic/non-systematic RS encoder with a decoding algorithm using erasures to generate parity bytes in specific locations within the combined signal, optimizing the encoding process for ATSC M/H signals by adapting the RS encoding scheme to improve efficiency and compatibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If legacy Reed-Solomon encoders are used for ATSC M/H signals, then backward compatibility with legacy A/53 standard is maintained, but operational efficiency deteriorates and costs increase
Solution Approach 1:
The patent implements a universal Reed-Solomon encoder that can handle both legacy A/53 standard signals and ATSC M/H signals through a single integrated architecture. The encoder uses a systematic/non-systematic RS encoding scheme that adapts to different signal types, eliminating the need for separate encoders for each standard and thereby improving operational efficiency while maintaining compatibility.
Solution Approach 2:
The patent employs parameter changes by dynamically adjusting encoding parameters based on the signal type. The encoder modifies redundancy levels, parity byte locations, and encoding modes according to whether the input is legacy or M/H signal, allowing optimal performance for each standard without requiring separate hardware implementations.
2Reliability
If additional encoding scheme is added for ATSC M/H signals, then mobile device reception is improved, but device complexity increases
Solution Approach 1:
The patent merges the legacy A/53 encoding scheme with the additional ATSC M/H encoding scheme into a unified Reed-Solomon encoder. By combining both encoding functionalities into a single device, the patent achieves improved signal recovery for mobile devices while avoiding the complexity of maintaining separate encoder systems.
Solution Approach 2:
The encoder employs dynamic adaptation by switching between different encoding modes (systematic and non-systematic) based on the input signal characteristics. This dynamic behavior allows the encoder to optimize performance for mobile reception while maintaining a relatively simple base architecture that doesn't require complex fixed configurations for each mode.
3Reliability
If redundant information is added to source data, then successful recovery of source data is improved, but effective data rate decreases
Solution Approach 1:
The patent applies local quality by selectively adding redundant information only where and how much is needed. The systematic/non-systematic RS encoding dynamically adjusts the amount and location of parity bytes based on the specific signal requirements, ensuring optimal redundancy for each data segment rather than uniformly adding maximum redundancy throughout, thereby preserving effective data rate.
Data Source
AI summary
Communication systems for broadcasting data often include the ability to combine and transmit more than one type or format of data. A method includes receiving a packet of data, determining a location for a parity byte, the location based on a characteristic of the packet of data, decoding the data to determine a value for the parity byte, and outputting a coded packet of data. An apparatus includes a first signal processor for receiving a first data signal and a second data signal, combining the signals, and creating a signal identifying the signals. The apparatus also includes a second signal processor for encoding the combined signal using a decoding algorithm to generate Reed-Solomon parity bytes in locations within the combined signal based on the identifying signal.