Active Speaker Visual Tracking Without Mechanical Camera Movement

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Solution Overview

Problem

Existing video conferencing technologies struggle to accurately identify and focus on the active speaker in a group setting, often causing users to be distracted by other participants, especially in multi-person and multi-terminal conferences.

Innovation Solution

A visual tracking system that utilizes image and audio data to detect and track the active speaker, providing indications such as zooming or highlighting to maintain focus on the speaker, without requiring mechanically movable components, and can be implemented in software and hardware or cloud-based services.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If mechanically movable components are used to focus on the active speaker, then the user can maintain focus on the speaker, but the system incurs latency issues and increased device complexity

Engineering Contradiction:

Improvefocus maintenanceVSAvoidmechanical components

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent replaces mechanically movable camera components with a software-based visual tracking system that processes video frames to identify and focus on active speakers. This substitution eliminates mechanical latency and complexity while maintaining the ability to keep the active speaker in focus through digital image processing and coordinate transformation algorithms.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

2Speed

If mechanically movable components are used to track the active speaker, then the speaker can be followed, but the system experiences latency

Engineering Contradiction:

Improvetracking speedVSAvoidlatency

Core Design Contradiction:

SpeedVSLoss of time

Solution Approach 1:

The patent eliminates mechanical tracking components and implements a software-based visual tracking system that processes video frames in real-time to identify active speakers and adjust the field of view. This approach achieves fast tracking response without the mechanical latency inherent in physical camera movement systems.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

3Loss of time

If visual tracking is implemented without mechanical components, then latency is reduced, but the system requires sophisticated image processing algorithms

Engineering Contradiction:

ImprovelatencyVSAvoidsoftware processing

Core Design Contradiction:

Loss of timeVSDevice complexity

Solution Approach 1:

The patent replaces mechanical tracking hardware with a software-based visual tracking system that uses image processing algorithms to identify active speakers and calculate adjusted camera coordinates. This substitution reduces latency while the software complexity is managed through efficient algorithm design and integration with existing video conferencing infrastructure.

Inventive Principle:

Principle #28Mechanics substitution (Replace mechanical system)

Data Source

PatentUS12567280B2Visual tracking system for active object

Publication Date: 2026.03.03 ALIBABA GROUP HOLDING LTD

AI summary

A visual tracking system helps to detect or locate an active object (such as an active sound source) in a live video or recorded video, and provides a way to help a user who views the live video or recorded video to focus on the active object, without easily being disturbed or distracted by other objects that are present with the active object. The visual tracking system may further track the active object, or detect a new active object when the live video or recorded video is played.