Multimedia Data Download System with Time-Limited Access Control

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Solution Overview

Problem

Existing multimedia data provision methods restrict user access due to per-download charging, lack of portability, and potential copyright infringement, as users cannot freely use multimedia data across various devices without continuous network access and face limitations in playing downloaded content after a predetermined period.

Innovation Solution

A method where users pay a fee for a predetermined period to download and play multimedia data, with authentication and time controls ensuring legal usage, allowing playback on registered devices and preventing unauthorized access or prolonged use after the period ends, enabling seamless access across different terminals, including those without direct network connectivity.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If per-download charging is applied, then copyright protection is improved, but user convenience deteriorates

Engineering Contradiction:

Improvecopyright protectionVSAvoiduser convenience

Core Design Contradiction:

ReliabilityVSEase of operation

Solution Approach 1:

The patent implements dynamic rights management where downloaded multimedia data includes embedded expiration timestamps and device-specific identifiers. The protection mechanism dynamically checks current time and device identity during playback, automatically disabling access after the licensed period or upon device mismatch, thus maintaining strong copyright protection while enabling legitimate flexible usage during the valid period.

Inventive Principle:

Principle #15Dynamics

Solution Approach 2:

The patent segments the usage rights by dividing them into specific time intervals and device instances. Each downloaded file contains segmented authorization data that validates against specific time ranges and device identifiers, allowing users to access content on multiple devices within the licensed period while preventing unauthorized redistribution and ensuring copyright protection.

Inventive Principle:

Principle #1Segmentation

2Reliability

If streaming method is used, then copyright protection is improved, but portability deteriorates

Engineering Contradiction:

Improvecopyright protectionVSAvoidportability

Core Design Contradiction:

ReliabilityVSAdaptability or versatility

Solution Approach 1:

The patent applies preliminary action by pre-downloading multimedia content to portable devices with embedded licensing information before the user needs to access it offline. The system预先 validates the device and time, embeds authorization data into the downloaded files, enabling portable playback without continuous network connection while maintaining copyright protection through time-limited and device-specific authorization.

Inventive Principle:

Principle #10Preliminary action

Solution Approach 2:

The patent introduces an intermediary authorization layer between the content and playback device. Downloaded files contain embedded metadata with device identifiers and time stamps that act as intermediaries, allowing the playback software to verify legitimacy without continuous server connection, thus enabling portability while maintaining copyright protection through the intermediary validation mechanism.

Inventive Principle:

Principle #24Intermediary (Mediator)

3Ease of operation

If download method is used, then user convenience is improved, but cost increases

Engineering Contradiction:

Improveuser convenienceVSAvoidtotal cost

Core Design Contradiction:

Ease of operationVSQuantity of substance

Solution Approach 1:

The patent implements universality by creating a single download transaction that provides universal access rights across multiple devices and multiple playback instances within a licensed time period. Instead of charging per-download, the system charges a flat fee that grants universal usage rights across the user's device ecosystem during the valid period, reducing total cost while maintaining user convenience.

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Adaptability or versatility

If multimedia data is stored in user terminal, then user flexibility is improved, but copyright infringement risk increases

Engineering Contradiction:

Improveuser flexibilityVSAvoidcopyright infringement risk

Core Design Contradiction:

Adaptability or versatilityVSObject-affected harmful factors

Solution Approach 1:

The patent applies preliminary anti-action by embedding time-limited and device-specific authorization data into downloaded files before distribution. The system preemptively configures the downloaded content with expiration timestamps and device identifiers, so that even if users attempt to copy or redistribute the files, the embedded authorization mechanisms automatically prevent illegal use after the licensed period or on unauthorized devices, thus enabling user flexibility while preemptively countering copyright infringement risks.

Inventive Principle:

Principle #9Preliminary anti-action

Data Source

PatentUS7480314B2Method for providing multimedia data via communication network

Publication Date: 2009.01.20 INTEL CORP

AI summary

The present invention relates to a method for providing multimedia data, and more particularly, to a method for providing multimedia data in which a predetermined fee is received from a user who wants multimedia data, and in this case, the user is enabled to download the multimedia data unrestrictedly for a predetermined period corresponding to the fee and play the downloaded multimedia data in various media of the user. According to the present invention, there is provided a method for providing multimedia data, enabling a user who pays a flat fee to download and play multimedia data unrestrictedly for a certain period, thereby reducing a user burden for download of multimedia data.