Analog HD Image Capture via Digital-to-Analog Conversion

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Solution Overview

Problem

Traditional analog video cameras fail to provide satisfactory high-definition video transmission due to compression delays and network instability, while network high-definition video cameras waste existing cable machinery resources.

Innovation Solution

Analog high-definition photographing method and apparatus that acquires and processes image data using an image sensor, converts it into an analog electric signal with a synchronization clock, and filters it for transmission over coaxial cables, eliminating the need for video compression and leveraging existing infrastructure.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If network high-definition video cameras are used to achieve high resolution video transmission, then image quality is improved, but transmission stability and reliability deteriorate due to network instability

Engineering Contradiction:

Improveimage qualityVSAvoidtransmission stability

Core Design Contradiction:

Measurement precisionVSReliability

Solution Approach 1:

The patent introduces an intermediary conversion process that transforms digital video signals into analog signals for transmission through coaxial cables. This intermediary step allows the system to leverage stable analog transmission infrastructure while maintaining high-definition image quality capabilities, thus resolving the contradiction between image quality and transmission stability.

Inventive Principle:

Principle #24Intermediary (Mediator)

Solution Approach 2:

The patent changes the signal transmission parameter from digital network protocol to analog electrical signal. By converting the video signal format and transmission medium, the system achieves both high-definition image quality and stable transmission through the analog coaxial cable infrastructure, eliminating network instability issues.

Inventive Principle:

Principle #35Parameter changes

2Quantity of substance

If video compression technologies like H.264 are used for transmission, then bandwidth utilization is improved, but real-time transmission capability deteriorates due to compression delay

Engineering Contradiction:

Improvebandwidth utilizationVSAvoidcompression delay

Core Design Contradiction:

Quantity of substanceVSLoss of time

Solution Approach 1:

The patent extracts and eliminates the video compression step from the transmission pipeline. By directly transmitting uncompressed or minimally compressed video signals through the analog conversion process, the system removes the source of compression delay while maintaining efficient bandwidth utilization through the analog signal format.

Inventive Principle:

Principle #2Taking out (Extraction)

3Measurement precision

If analog video cameras are upgraded to network high-definition video cameras, then image resolution is improved, but resource utilization deteriorates due to obsolete cable machinery

Engineering Contradiction:

Improveimage resolutionVSAvoidresource waste

Core Design Contradiction:

Measurement precisionVSLoss of energy

Solution Approach 1:

The patent creates a hybrid system that combines the high-resolution imaging capability of network cameras with the transmission capabilities of analog coaxial cable infrastructure. This multi-functional approach allows the system to simultaneously achieve high-definition image resolution and utilize existing cable machinery resources, eliminating resource waste.

Inventive Principle:

Principle #6Universality (Multi-functionality)

Solution Approach 2:

The analog signal conversion process serves as an intermediary that bridges the gap between digital high-definition camera sensors and analog coaxial cable transmission. This intermediary enables the reuse of existing cable infrastructure while maintaining high-definition image resolution capabilities.

Inventive Principle:

Principle #24Intermediary (Mediator)

Applied Scientific Principles

This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.

Function Achieved in This Case

Ensures real-time, stable, and reliable high-definition video transmission while utilizing existing cable machineries, addressing the limitations of network high-definition video cameras.

Implementation Method 1

converting the modulation data in the second preset format into an analog electric signal in a third preset format using a synchronization clock with a sampling frequency which is a preset frequency

Methodology Applied

Scientific EffectDigital to Analog Conversion:

Implementation Method 2

filtering the analog electric signal in the third preset format using a filter circuit

Methodology Applied

Scientific EffectElectrical Filtering: Filter (electronic)

Data Source

PatentUS9912905B2Method and device for implementing analog high-definition image capturing

Publication Date: 2018.03.06 ZHEJIANG DAHUA TECH CO LTD

AI summary

Provided in embodiments of the present invention are a method and device for implementing high-definition image capturing, comprising: collecting and acquiring image data of a first set format by using an image sensor, image processing the image data then encoding into modulated data of a second set format, converting the modulated data into an analog electric signal of a third set format by using a synchronous clock, and filtering the analog electric signal by using a filter circuit then transmitting via a coaxial cable. The above series of operations is capable of implementing the collection and processing of a high-resolution video, and solves the problem that existing high-definition camera are incapable of ensuring timeliness during a video transmission process and provides poor stability and reliability, while at the same time, employment of the present invention also allows an existing analog camera to use a cable device for video transmission, thus implementing full utilization of existing resources.