Variable-Length Decoding with Fixed-Length Clipping
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Solution Overview
Problem
Conventional variable-length encoding methods result in slower decoding speeds compared to fixed-length encoding, despite offering higher compression ratios, making high-speed decoding of variable-length encoded data challenging.
Innovation Solution
A decoding apparatus that clips input data into predetermined fixed-length segments greater than or equal to the maximum code length of the encoded data, allowing for parallel clipping and decoding processes, thereby enhancing decoding efficiency and speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of substance
If variable-length encoding is used, then compression ratio is improved, but decoding speed deteriorates
Solution Approach 1:
The patent segments the variable-length encoded data into multiple fixed-length packets for parallel processing. By dividing the decoding task into independent fixed-length segments, the system can process multiple packets simultaneously, thereby improving decoding speed while maintaining the compression benefits of variable-length encoding.
Solution Approach 2:
The patent performs preliminary clipping of the variable-length encoded data into fixed-length packets before decoding. This pre-processing step enables subsequent parallel decoding operations by establishing uniform data structures that can be processed simultaneously, thus resolving the speed bottleneck without sacrificing compression efficiency.
2Loss of substance
If variable-length encoding is used, then compression efficiency is improved, but processing time increases
Solution Approach 1:
The patent divides the encoded data stream into multiple fixed-length packets that can be processed in parallel. This segmentation transforms the sequential processing requirement into a parallel processing architecture, significantly reducing total processing time while preserving the compression efficiency of variable-length encoding.
Solution Approach 2:
The patent clips the variable-length encoded data into fixed-length packets, where some packets may contain partial information. This partial action approach allows parallel processing of complete packets while minimizing the overhead of handling variable-length structures, thus reducing processing time without significantly impacting compression efficiency.
3Speed
If high-speed decoding is implemented, then decoding speed is improved, but device complexity increases
Solution Approach 1:
The patent uses segmentation to divide complex variable-length decoding into simpler fixed-length packet processing tasks. Each packet can be decoded using standardized fixed-length decoding logic, reducing the complexity of individual processing units while achieving high overall decoding speed through parallel execution.
Solution Approach 2:
The patent performs preliminary clipping into fixed-length packets, which simplifies subsequent decoding operations. This pre-processing step transforms complex variable-length decoding into simpler fixed-length decoding tasks, reducing the computational complexity of the main decoding pipeline while maintaining high speed through parallel processing.
Data Source
AI summary
According to an embodiment, a decoding apparatus includes a clipping unit and a decoding unit. The clipping unit is configured to clip pieces of encoded data each having a predetermined first code length from input data encoded with variable-length encoding. The predetermined first code length is greater than or equal to a maximum code length among a plurality of pieces of encoded data included in the input data. The decoding unit is configured to decode the clipped piece of encoded data by using variable-length decoding.