Signal Processing Device Polar-Absolute Coordinate Conversion

Solution Overview

Problem

The existing MPEG-H coding standard for 3D audio, particularly in fixed viewpoint scenarios, is inefficient in transmitting position information when the listener is movable, leading to reduced transmission efficiency due to the need to code and transmit position information for all audio objects even if the audio objects are stationary.

Innovation Solution

A signal processing device and method that acquires and converts between polar and absolute coordinate position information, allowing for efficient transmission by categorizing audio objects based on their dependence on position, using polar coordinates for objects with low dependence and absolute coordinates for those with high dependence, and generating bit streams accordingly.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Measurement precision

If polar coordinate position information is used for all audio objects in free viewpoint content, then sound localization accuracy is improved, but transmission efficiency deteriorates due to unnecessary updates when audio objects are stationary

Engineering Contradiction:

Improvesound localization accuracyVSAvoidtransmission efficiency

Core Design Contradiction:

Measurement precisionVSProductivity

Solution Approach 1:

The patent segments audio objects into two categories: those with high positional dependence and those with low positional dependence. This segmentation allows different coordinate systems to be applied selectively, improving transmission efficiency without compromising sound localization accuracy for objects that require it.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different coordinate system representations to different audio objects based on their specific characteristics. Audio objects with high positional dependence use absolute coordinate information while those with low positional dependence use relative coordinate information, optimizing the representation quality for each object's specific needs.

Inventive Principle:

Principle #3Local quality

2Productivity

If absolute coordinate position information is used for all audio objects, then transmission efficiency is improved, but sound localization accuracy deteriorates for objects with high positional dependence

Engineering Contradiction:

Improvetransmission efficiencyVSAvoidsound localization accuracy

Core Design Contradiction:

ProductivityVSMeasurement precision

Solution Approach 1:

The patent segments audio objects into two categories: those with high positional dependence and those with low positional dependence. This segmentation allows different coordinate systems to be applied selectively, improving transmission efficiency without compromising sound localization accuracy for objects that require it.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different coordinate system representations to different audio objects based on their specific characteristics. Audio objects with high positional dependence use absolute coordinate information while those with low positional dependence use relative coordinate information, optimizing the representation quality for each object's specific needs.

Inventive Principle:

Principle #3Local quality

3Measurement precision

If position information is updated for all audio objects when the listener moves, then sound localization accuracy is maintained, but data transmission volume increases

Engineering Contradiction:

Improvesound localization accuracyVSAvoiddata transmission volume

Core Design Contradiction:

Measurement precisionVSQuantity of substance

Solution Approach 1:

The patent segments audio objects into two categories: those with high positional dependence and those with low positional dependence. This segmentation allows different coordinate systems to be applied selectively, improving transmission efficiency without compromising sound localization accuracy for objects that require it.

Inventive Principle:

Principle #1Segmentation

Solution Approach 2:

The patent applies different coordinate system representations to different audio objects based on their specific characteristics. Audio objects with high positional dependence use absolute coordinate information while those with low positional dependence use relative coordinate information, optimizing the representation quality for each object's specific needs.

Inventive Principle:

Principle #3Local quality

Data Source

PatentUS12143802B2Signal processing device and method

Publication Date: 2024.11.12 SONY GROUP CORP

AI summary

The present technology relates to a signal processing device, a method, and a program capable of improving transmission efficiency and efficiency in the data processing amount. A signal processing device includes: an acquisition unit that acquires polar coordinate position information indicating a position of a first object expressed by polar coordinates, audio data of the first object, absolute coordinate position information indicating a position of a second object expressed by absolute coordinates, and audio data of the second object; a coordinate conversion unit that converts the absolute coordinate position information into polar coordinate position information indicating a position of the second object; and a rendering processing unit that performs rendering processing on the basis of the polar coordinate position information and the audio data of the first object and the polar coordinate position information and the audio data of the second object. The present technology can be applied to a content reproduction system.