Virtual Camera Audio Mixing in SFU Streaming Topology
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Solution Overview
Problem
Resource-constrained devices, such as security cameras, face challenges in managing computationally complex and time-sensitive processes during interactive communication sessions, leading to increased computational load and power consumption.
Innovation Solution
Implementing a virtual camera within a cloud-based streaming topology that offloads computational tasks, allowing the physical device to manage a single audio track and reducing its workload.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a physical camera device processes multiple audio streams directly, then audio processing capability is improved, but computational load and power consumption increase
Solution Approach 1:
The patent extracts the computationally intensive audio mixing function from the physical camera device and relocates it to a cloud-based virtual camera service. The physical device only captures and transmits individual audio streams, while the virtual camera service performs the mixing of multiple audio streams into a composite track, thereby reducing the power consumption and computational load on the physical device while maintaining full audio processing capability.
Solution Approach 2:
The patent introduces a cloud-based virtual camera service as an intermediary between the physical camera device and the communication session participants. This intermediary handles the complex audio mixing tasks, allowing the physical device to operate with minimal processing requirements while still enabling multi-audio-stream communication sessions.
2Adaptability or versatility
If a physical camera device manages multiple audio tracks locally, then communication functionality is improved, but device complexity increases
Solution Approach 1:
The patent extracts the audio track management and mixing logic from the physical camera device and places it in the cloud-based virtual camera service. The physical device's role is simplified to capturing and transmitting audio streams, while the complex operations of managing multiple audio tracks, mixing them, and synchronizing with video are handled by the virtual camera service, thereby reducing device complexity while maintaining full communication functionality.
Solution Approach 2:
The virtual camera service acts as an intermediary that manages the complexity of multi-audio-track communication sessions. It handles the coordination between multiple audio sources, the mixing process, and the delivery of the composite audio track to participants, allowing the physical camera device to participate in complex communication sessions without having to implement the complex management logic itself.
Data Source
AI summary
A computer implemented method includes initiating, by at least one processor within a computing environment, operation of a virtual camera and an SFU; receiving, by the SFU, a plurality of audio streams from a plurality of remote devices; communicating, by the SFU, the plurality of audio streams to the virtual camera; receiving, by the virtual camera, the plurality of audio streams from the SFU; mixing, by the virtual camera, the plurality of audio streams into a single audio stream; communicating, by the virtual camera, the single audio stream to a physical image capture device; and receiving, by the virtual camera, an audiovisual stream from the physical image capture device.