Audio Watermark for Double Processing Avoidance
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Solution Overview
Problem
Existing audio processing systems in mobile devices face challenges with double processing, which consumes extra resources and can result in a negative user experience due to perceptible differences in audio quality. Additionally, communicating between components to avoid double processing is complicated by operating system security constraints.
Innovation Solution
The proposed solution involves using audio watermarks to detect whether processing has already been performed on audio data. This is achieved by detecting transients in the audio data, transforming them into frequency domain data, and comparing bands to determine if the audio watermark is present. If correlated, the processing component avoids applying additional effects to prevent double processing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control signals or metadata are used to communicate between audio processing components, then double processing can be avoided, but the system complexity increases due to operating system security constraints and the need for intermediary security components
Solution Approach 1:
The patent uses an audio watermark as an intermediary carrier to transmit processing status information between audio processing components. Instead of direct control signal communication which requires security intermediaries, the processing status is embedded within the audio signal itself as a watermark, allowing components to exchange information through the audio data stream without requiring additional communication infrastructure or security handling.
Solution Approach 2:
The patent combines the processing status information with the audio signal by embedding it as a watermark within the audio data stream. This merging allows the control information to travel along with the audio data through existing audio processing pipelines without requiring separate communication channels, thereby simplifying the overall system architecture.
2Adaptability or versatility
If audio processing is performed by multiple components in the audio processing chain, then more processing functions can be provided, but resource consumption increases due to double processing
Solution Approach 1:
The patent implements a feedback mechanism where the first audio processing component embeds a watermark indicating that processing has been performed. The second audio processing component detects this watermark feedback and uses it to determine whether to apply processing, thereby avoiding redundant processing and reducing energy consumption while maintaining the ability of multiple components to provide processing functions.
3Ease of operation
If control signals are passed directly between audio processing components, then communication is simplified, but security constraints prevent direct communication and require intermediary handling
Solution Approach 1:
The audio watermark serves as an intermediary that carries processing status information between components without requiring direct control signal communication. This approach bypasses security constraints that would otherwise require complex intermediary security components, as the information is transmitted through the audio data stream which is already permitted to flow between components.
Solution Approach 2:
The audio signal itself serves as the communication medium, carrying both the audio content and the processing status information embedded as a watermark. This self-service approach allows the audio data stream to convey control information without requiring separate communication infrastructure, simplifying the overall system while maintaining security.
Data Source
AI summary
A system for using an audio watermark to avoid double processing. The decoder inserts the audio watermark during a transient in the audio signal. This avoids the drawbacks of using out-of-band control signals or metadata. The decoder performs detecting a transient in a first audio signal, transforming a portion related to the transient into the frequency domain to compare a first band of the frequency domain data and a second band of the frequency domain data, when the first band is uncorrelated with the second band, the decoder performs processing on the first audio data to generate a second audio data, when the first band is correlated, the first audio data is used as the second audio data without performing any processing.