Multilingual Audio Mixing via Stereo Azimuth Separation

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Solution Overview

Problem

Current multilingual audio services waste storage and network resources by allocating separate audio channels for each language, which is inefficient for providing localized content in a multicultural and multiracial world.

Innovation Solution

A method and apparatus that adjust energy values and initial azimuth angles of sound sources, mix them to generate stereo signals, separate and store them based on sound quality using a sound source separating algorithm, and include additional information such as signal intensity, azimuth angle, and language details.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Adaptability or versatility

If separate audio channels are allocated for each language, then multilingual audio service is provided, but storage and network resources are wasted

Engineering Contradiction:

Improvemultilingual audio serviceVSAvoidstorage and network resources

Core Design Contradiction:

Adaptability or versatilityVSQuantity of substance

Solution Approach 1:

Multiple language audio channels are merged into a single stereo audio channel. The left channel contains a first language audio signal and the right channel contains a second language audio signal, allowing multiple languages to be transmitted and stored in one channel instead of separate channels for each language.

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The stereo audio channel serves multiple functions simultaneously - it can transmit different language content for different regions, provide language switching capability, and reduce resource consumption. A single stereo channel replaces what would traditionally require multiple separate audio channels.

Inventive Principle:

Principle #6Universality (Multi-functionality)

2Quantity of substance

If stereo signal is used for multilingual content, then resource efficiency is improved, but sound quality may be compromised

Engineering Contradiction:

Improvestorage and network resourcesVSAvoidsound quality

Core Design Contradiction:

Quantity of substanceVSReliability

Solution Approach 1:

The stereo audio channel is segmented into distinct language components. The left channel is dedicated to the first language and the right channel to the second language, allowing each language to maintain its audio quality without interference while sharing the same stereo channel structure.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent changes the parameter allocation within the stereo channel by assigning specific languages to specific channels (left/right) and using metadata to identify language content. This parameter organization maintains sound quality while enabling efficient resource usage.

Inventive Principle:

Principle #35Parameter changes

Data Source

PatentUS9905246B2Apparatus and method of creating multilingual audio content based on stereo audio signal

Publication Date: 2018.02.27 ELECTRONICS & TELECOMM RES INST

AI summary

Provided is an apparatus and method for creating multilingual audio content based on a stereo audio signal. The method of creating multilingual audio content including adjusting an energy value of each of a plurality of sound sources provided in multiple languages, setting an initial azimuth angle of each of the sound sources based on a number of the sound sources, mixing each of the sound sources to generate a stereo signal based on the set initial azimuth angle, separating the sound sources to play the mixed sound sources using a sound source separating algorithm, and storing the mixed sound sources based on a sound quality of each of the separated sound sources.