Audio Signal Processing for Attribute-Aware Amplitude Smoothing
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional audio signal processing techniques often result in decoded signals with inappropriate amplitudes, leading to unnatural sound quality due to the direct output of large amplitude portions that should be compressed, causing subjective sound quality degradation.
Innovation Solution
An audio signal processing apparatus that decodes bit streams on a frame-by-frame basis, using a detection unit to identify changes in attribute information between frames and processing the decoded signal using either pre-change or post-change additional data to prevent the use of conflicting amplitude adjustments, thereby ensuring appropriate amplitude processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If additional data from the second period is used to process the decoded signal of the target frame, then smoothing is achieved and sudden amplitude changes are prevented, but subjective sound quality degrades when attribute information changes between frames
Solution Approach 1:
The processing unit dynamically adjusts its behavior based on attribute information changes. When attribute information changes between frames, the system switches from using additional data across frame boundaries to using only period-specific additional data, making the processing adaptive to content changes while maintaining stability during consistent periods
Solution Approach 2:
The patent applies different processing strategies to different temporal regions based on attribute information consistency. Within periods of consistent attribute information, smoothing across boundaries is applied; at boundaries where attribute information changes, period-specific processing is applied, creating locally optimized quality
2Quantity of substance
If additional data from both periods is used for processing, then more data is available for amplitude adjustment, but conflicting amplitude adjustments occur when attribute information changes
Solution Approach 1:
The processing unit extracts and uses only the relevant additional data corresponding to the target frame's attribute information period, excluding additional data from periods with different attribute information that would cause conflicting amplitude adjustments
Solution Approach 2:
The detection unit preliminarily identifies attribute information changes before processing, allowing the processing unit to pre-determine which additional data to use, preventing conflicting amplitude adjustments before they occur
Data Source
AI summary
An audio signal processing apparatus that processes a bit stream generated by coding an audio signal on a frame-by-frame basis, the bit stream including, for each frame, coded data representing the audio signal, additional data and attribute information, the audio signal processing apparatus including a decoding unit configured to decode the coded data to generate a decoded signal, a processing unit configured to process the decoded signal, a detection unit configured to detect whether or not there has been a change in the attribute information, and a storage unit, wherein the processing unit is configured to, when the change is not detected, process the decoded signal by using at least two pieces of additional data stored, and when the change is detected, process the decoded signal by using only either additional data before detection of the change or additional data after detection of the change.