Multimedia Stream Key Sequence Detection for Cloud Audio Failover
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Solution Overview
Problem
Existing multimedia systems in vehicles face challenges in detecting a loss of connection or crash of cloud-based signal processing quickly and reliably, leading to potential audio signal corruption and unpleasant artifacts.
Innovation Solution
A method involving encoding a predefined key sequence into a multimedia stream, which is transmitted to a remote processing entity for additional features, and checking for its presence in the returned stream to determine connection status, allowing a swift switch to local processing if the sequence is absent.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If cloud-based signal processing is used to provide sophisticated audio features, then audio processing capability is improved, but reliability deteriorates due to potential connection loss or cloud crashes
Solution Approach 1:
The system embeds a key sequence in the transmitted audio signal before sending it to the cloud, and prepares to detect this sequence in the returned signal. This preliminary preparation enables immediate detection of connection issues without requiring complex continuous monitoring protocols.
Solution Approach 2:
The system uses feedback by analyzing whether the key sequence appears in the cloud-processed audio signal. This simple feedback mechanism provides reliable connection status information that triggers automatic switching between cloud and local processing modes, resolving the reliability concern.
2Reliability
If connection loss detection is performed quickly to prevent audio corruption, then reliability is improved, but device complexity increases due to additional detection mechanisms
Solution Approach 1:
The audio signal serves multiple functions: it carries both the actual audio content and the embedded key sequence for connection detection. This multi-functionality eliminates the need for separate detection channels or additional communication overhead, maintaining simplicity while ensuring reliable connection monitoring.
Solution Approach 2:
The system uses its own transmitted audio signal as the detection medium. By embedding the key sequence in the outgoing signal and checking for its presence in the incoming signal, the system performs self-diagnosis of connection status without requiring external monitoring infrastructure.
3Device complexity
If cloud processing is used to reduce local processing requirements, then device complexity is reduced, but loss of information occurs when connection is lost
Solution Approach 1:
The system maintains local audio processing capability as a backup option, cushioning against the potential loss of cloud connection. The key sequence detection mechanism enables automatic switching to this pre-prepared local processing path, preventing audio signal loss when cloud connection fails.
Data Source
AI summary
The application relates to a method for operating a multimedia system with encoding a key sequence into a multimedia stream in order to generate an amended multimedia stream, the key sequence comprising a predefined sequence of numbers. The amended multimedia stream with the encoded key sequence is transmitted to a remote processing entity for a remote processing of the amended multimedia stream, and a multimedia stream is received from the remote processing entity. It is determined whether the received multimedia stream includes the encoded key sequence, wherein in response to determining that the received multimedia stream does not include the encoded key sequence, the multimedia system uses, for an output of the multimedia system a locally processed multimedia stream processed locally within the multimedia system.