Wireless Display Source Device Resource Utilization

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Solution Overview

Problem

Conventional wireless display protocols require transcoding of compressed content in source devices, leading to resource consumption and battery drain, while streaming compressed content without transcoding prevents local playback.

Innovation Solution

A method where a source device determines the decoding capability of a sink device and transmits compressed content directly without transcoding if the sink device can decode it, allowing for local playback and reduced resource usage.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If transcoding of compressed content is performed in source devices, then compatibility with sink devices is improved, but system resource consumption increases and battery life decreases

Engineering Contradiction:

Improvecompatibility with sink devicesVSAvoidsystem resource consumption

Core Design Contradiction:

Adaptability or versatilityVSUse of energy by moving object

Solution Approach 1:

The source device determines the decoding capability of the sink device before transmitting compressed content. This preliminary capability assessment allows the system to prepare the appropriate content format in advance, avoiding the need for real-time transcoding and thereby reducing resource consumption while ensuring compatibility.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The system changes the parameter of content format based on the decoded capability information received from the sink device. By adapting the content format parameter to match the sink device's capabilities, the system achieves compatibility without performing resource-intensive transcoding operations.

Inventive Principle:

Principle #35Parameter changes

2Adaptability or versatility

If transcoding of compressed content is performed in source devices, then compatibility with sink devices is improved, but battery life is reduced

Engineering Contradiction:

Improvecompatibility with sink devicesVSAvoidbattery life

Core Design Contradiction:

Adaptability or versatilityVSDuration of action of moving object

Solution Approach 1:

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent converts the potential harm of incompatible content formats into a benefit by using capability information exchange. Instead of forcing transcoding to ensure compatibility, the system uses the sink device's decoded capability information to select appropriate content formats, turning the diversity of device capabilities into an advantage that enables efficient, compatibility-guaranteed transmission.

Inventive Principle:

Principle #22Blessing in disguise (Convert harm into benefit)

3Use of energy by moving object

If compressed content is transmitted without transcoding, then resource consumption is reduced, but local playback capability is lost

Engineering Contradiction:

Improveresource consumptionVSAvoidlocal playback capability

Core Design Contradiction:

Use of energy by moving objectVSAdaptability or versatility

Solution Approach 1:

The system applies different quality characteristics to different parts of the transmission process. Compressed content with appropriate format indicators is transmitted for efficient resource usage, while the source device maintains local playback capability by keeping the original content. The capability information exchange ensures that the transmitted content can be properly decoded by the sink device, providing local quality optimization without sacrificing overall functionality.

Inventive Principle:

Principle #3Local quality

4Use of energy by moving object

If capability information exchange is implemented, then unnecessary transcoding is avoided, but communication overhead increases

Engineering Contradiction:

Improvetranscoding operationsVSAvoidcommunication data

Core Design Contradiction:

Use of energy by moving objectVSQuantity of substance

Solution Approach 1:

The system extracts only the essential decoded capability information from the sink device and transmits this condensed data back to the source device. By extracting only the necessary capability parameters rather than exchanging complete device profiles, the system avoids unnecessary transcoding operations while minimizing communication overhead.

Inventive Principle:

Principle #2Taking out (Extraction)

Data Source

PatentUS9800822B2Method and apparatus for resource utilization in a source device for wireless display

Publication Date: 2017.10.24 QUALCOMM INC

AI summary

This disclosure relates to techniques for resource utilization in a source device when transmitting video data in a Wireless Display (WD) system. A method for wireless display of compressed content may comprise determining, by a source device, a decoding capability of a sink device, receiving, by the source device, a request to display compressed content at the sink device in a wireless display session, and in the case that the decoding capability of the sink device allows for decoding of the compressed content, transmitting the compressed content from the source device to the sink device, whereby transcoding the compressed content is avoided in the source device.