Unified Audio Coding Apparatus for Signal-Adaptive Lossless and Lossy Encoding
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Solution Overview
Problem
Conventional audio encoding and decoding technologies separate lossy and lossless coding methods, lacking an efficient approach to determine optimal coding methods based on input signal characteristics for improved coding efficiency.
Innovation Solution
An audio encoding apparatus and method that determines the type of input signal, generates a residual signal, and performs either lossless or lossy coding using a unified structure, incorporating entropy coding methods to reduce complexity and enhance coding efficiency by transforming and quantizing signals in the frequency domain.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If separate lossless and lossy coding methods are used, then coding efficiency for specific signal types is improved, but device complexity increases due to multiple independent coding structures
Solution Approach 1:
The patent implements a unified audio coding apparatus that can perform both lossless and lossy coding functions through a single structure. The coding apparatus includes a prediction encoding module, residual signal generation module, and entropy coding module that can operate in different modes (lossless or lossy) depending on the input signal characteristics, eliminating the need for separate independent coding structures while maintaining high coding efficiency for different signal types
Solution Approach 2:
The patent introduces dynamic mode switching capability where the coding apparatus can adaptively change between lossless and lossy coding modes based on the determined type of input signal. This dynamic adaptation allows the system to optimize coding efficiency for different signal characteristics while using a single flexible structure rather than multiple fixed structures
2Productivity
If multiple independent coding structures are used for lossless and lossy coding, then optimal coding can be selected for different signal types, but ease of operation deteriorates due to separate encoding and decoding processes
Solution Approach 1:
The patent creates a universal audio coding apparatus that integrates both lossless and lossy coding capabilities in one system. The same apparatus structure, including prediction encoding, residual signal generation, and entropy coding modules, can operate in different modes to handle various signal types, simplifying the operational interface and process while maintaining optimal coding efficiency
Data Source
AI summary
An audio encoding apparatus to encode an audio signal using lossless coding or lossy coding and an audio decoding apparatus to decode an encoded audio signal are disclosed. An audio encoding apparatus according to an exemplary embodiment may include an input signal type determination unit to determine a type of an input signal based on characteristics of the input signal, a residual signal generation unit to generate a residual signal based on an output signal from the input signal type determination unit, and a coding unit to perform lossless coding or lossy coding using the residual signal.