Vehicle Video Streaming Unit Latency Mode Switching

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Solution Overview

Problem

Current monitoring and surveillance systems for vehicles, such as trains, face challenges in efficiently managing video data transmission bandwidth and latency, particularly when switching between monitoring and surveillance modes, as they lack direct control over network and content jitter buffers during active streaming.

Innovation Solution

A monitoring and surveillance system that operates in multiple modes with different latency requirements, where a video processing server selects the appropriate mode and communicates it to the camera and streaming units, allowing for timely video packet transmission by assigning timing parameters and discarding older packets when switching modes, and using a single streaming unit to manage video data from multiple camera units.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If video data is streamed from multiple cameras simultaneously, then monitoring coverage is improved, but uplink bandwidth consumption increases and transmission costs rise

Engineering Contradiction:

Improvemonitoring coverageVSAvoiduplink bandwidth consumption

Core Design Contradiction:

ReliabilityVSLoss of energy

Solution Approach 1:

The streaming unit is designed to handle multiple camera inputs and can dynamically switch between different streaming modes (surveillance vs. monitoring), making it a multi-functional component that adapts to different operational requirements without requiring separate dedicated streaming units for each camera

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The system changes the streaming parameters dynamically by switching between surveillance mode (higher bitrate, lower resolution, larger buffers) and monitoring mode (lower bitrate, higher resolution, smaller buffers) based on operational needs, thereby optimizing bandwidth consumption while maintaining adequate monitoring coverage

Inventive Principle:

Principle #35Parameter changes

2Stability of the object's composition

If jitter buffer duration is increased to handle network variability, then video streaming stability is improved, but latency increases and conversational interaction quality deteriorates

Engineering Contradiction:

Improvevideo streaming stabilityVSAvoidlatency

Core Design Contradiction:

Stability of the object's compositionVSLoss of time

Solution Approach 1:

The jitter buffer duration is made dynamic rather than fixed, allowing the system to adjust buffer sizes in real-time based on the operational mode (surveillance vs. monitoring) and network conditions, enabling the system to optimize between stability and latency requirements for different use cases

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The system pre-configures different jitter buffer strategies for different operational modes, having surveillance mode use larger pre-configured buffers for stability while monitoring mode uses smaller buffers for lower latency, allowing optimal performance to be prepared in advance for each mode

Inventive Principle:

Principle #10Preliminary action

3Loss of energy

If codec configuration is optimized for surveillance mode, then bandwidth efficiency is improved, but conversational quality and interaction capability deteriorate

Engineering Contradiction:

Improvebandwidth efficiencyVSAvoidconversational quality

Core Design Contradiction:

Loss of energyVSReliability

Solution Approach 1:

The codec configuration parameters (bitrate, resolution, encoding profile) are changed dynamically based on the operational mode, with surveillance mode using bandwidth-efficient settings and monitoring mode using higher quality settings optimized for conversational interaction and real-time analysis

Inventive Principle:

Principle #35Parameter changes

4Device complexity

If fixed quality encoding is used to simplify system configuration, then device complexity is reduced, but adaptability to different operational requirements deteriorates

Engineering Contradiction:

Improveconfiguration complexityVSAvoidoperational mode adaptability

Core Design Contradiction:

Device complexityVSAdaptability or versatility

Solution Approach 1:

The system transitions from fixed quality encoding to dynamic quality encoding where the encoding parameters automatically adjust based on the operational mode and network conditions, enabling the system to adapt to different requirements without requiring complex manual configuration for each scenario

Inventive Principle:

Principle #15Dynamics

Data Source

PatentUS11665220B2Monitoring and surveillance system arranged for processing video data associated with a vehicle, as well as corresponding devices and method

Publication Date: 2023.05.30 TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)

AI summary

A monitoring and surveillance system arranged for processing video data associated with a vehicle, wherein said system is arranged to operate in at least two operating modi, a first modus of said two modi being associated with a first latency requirement for said video data and a second modus of said two modi being associated with a second latency requirement, said system comprising a camera unit, arranged to be installed in said vehicle, wherein said camera unit is arranged for capturing video data; a streaming unit, arranged to be installed in said vehicle, and arranged for receiving said video data and for transmitting said video data over a telecommunication network to a video processing server; said video processing server arranged for selecting a modus of said at least two operating modi, and for communicating said selected modus, over said telecommunication network, to said camera unit such that said streaming unit can be tuned to said selected modus. Complementary systems and methods are also presented herein.