Decoder Variable Readout Bit Rate for Latency Reduction
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Solution Overview
Problem
Existing digital data decoding methods experience significant latency due to the need to wait for entire data blocks to be transmitted before bit error correction can be performed, leading to noticeable delays during channel changes in multimedia transmissions.
Innovation Solution
Implementing a decoding arrangement with a variable readout bit rate that reduces the readout bit rate temporarily to allow for bit error correction, utilizing forward error correction methods and maintaining a constant clock frequency to synchronize display units, while ensuring the data input buffer is filled efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the decoder waits for entire data blocks to be transmitted before performing bit error correction, then bit error correction accuracy is improved, but latency increases
Solution Approach 1:
The patent segments the data processing into two distinct modes: a first operating mode where data blocks are buffered completely before correction (high reliability), and a second operating mode during channel changes where correction occurs with partial buffering (low latency). This segmentation allows the system to switch between reliability-optimized and speed-optimized operation based on operational context.
Solution Approach 2:
The patent implements dynamic switching between two operating modes based on channel change detection. The controller dynamically adjusts the buffering strategy and correction timing according to the operational state, transitioning from a wait-for-complete-block approach to an immediate-correction approach when channel changes are detected, thereby optimizing the trade-off between reliability and latency in real-time.
2Reliability
If large data blocks are used for bit error correction, then correction effectiveness is improved, but data overhead increases
Solution Approach 1:
The patent changes the parameter of data block size dynamically based on operational mode. In the first operating mode, larger data blocks are buffered to enable effective correction. In the second operating mode during channel changes, the system adjusts to work with smaller, partially buffered data blocks, thereby reducing data overhead while maintaining acceptable correction effectiveness through the dual-mode architecture.
3Reliability
If the readout bit rate is reduced temporarily to buffer data for correction, then bit error correction capability is improved, but transmission efficiency decreases
Solution Approach 1:
The patent implements periodic action by temporarily reducing the readout bit rate only during specific time periods when channel changes are detected and data buffering is required. During normal operation, the full bit rate is maintained. This periodic adjustment of the readout rate allows the system to achieve correction capability when needed while minimizing the impact on overall transmission efficiency.
Data Source
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AI summary
Arrangement and method for decoding digital data BD, with a data input buffer unit DEP and a decoding unit D, wherein the decoding unit D retrieves the buffered digital data BD from the data input buffer unit DEP, with a variable retrieval bit rate ABR, and reduces the retrieval bit rate ABR at specifiable times t1, t2,...tn for specifiable time segments ?t1, ?t2,...?tn.