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Upmixing method and system for multichannel audio reproduction

Through the combination of the adaptive filter and the delay line of the audio signal enhancement device, the problem of lack of heavy bass effect and time blur in the audio upmixing system in the existing technology when processing the phase-influenced audio signal is solved, and high-quality natural sound is achieved. Reproducible and stable atemporally blurred images.

Active Publication Date: 2013-07-17
DOLBY INTERNATIONAL AB
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AI Technical Summary

Problems solved by technology

This still results in a poor audiovisual reproduction
[0012] Accordingly, prior art audio upmixing systems in which the two-channel audio material comprises time-delayed panning recordings suffer from at least some of these disadvantages, wherein the original sound is not reproduced and the reproduction of special effects is not reproduced. optimally achieved, or the special effect is reproduced on the wrong speakers
These shortcomings lead to an overall unnatural listening experience for the listener

Method used

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  • Upmixing method and system for multichannel audio reproduction

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Embodiment Construction

[0040] The following words "low frequency effect" and "bass subwoofer" may be used together or interchangeably as they both refer to the same characteristic and may be summarized as "LFE". Thus the upmix output signal can be represented as a low frequency signal or channel, an LFE signal or channel, a subwoofer signal or channel, an LFE subwoofer signal or channel, or a low frequency effect LFE subwoofer signal or channel, or otherwise Combination method.

[0041] From the following description, those skilled in the art should understand that although any one of the best aspects of the present invention has provided solutions to at least some of the problems and methods of the background technology, the combination of multiple viewpoints disclosed herein and Background Art Compared to produce additional synergistic advantageous effects, will be described in detail as follows.

[0042] Figure 1A A simple schematic diagram showing the configuration of a background art 5.1 upmi...

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Abstract

An audio signal enhancing device, and a corresponding method of enhancing stereophonic signals, is provided which generates an enhanced signal with improved spatial sound image quality for upmixing a stereophonic input signal. When used in combination with a centre channel processor or LFE processor, an improved processing of the input signals is provided resulting in final centre channel and at least one LFE sub-woofer channel wherein the problems and disadvantages of the prior art are resolved. The result is a centre and LFE signal that contains a stable, non time-smeared image with a high quality natural-sounding fidelity. These advantages are achieved especially for time-delayed or phase-panned stereo input signals, independently of whether they are matrix encoded or non-matrix encoded input signals.

Description

technical field [0001] The present invention relates generally to audio signal processing, and more particularly to a novel and improved audio upmixer and method of upmixing stereo audio channels. Background technique [0002] Current audio applications have evolved from standard two-channel stereo audio recording and playback systems to more complex systems, and several speakers can achieve multiple different effects and provide multiple different sensations. Not only the number of loudspeakers has increased, but also the number of functions of each loudspeaker has increased, with different characteristics, resulting in more and more different professional domestic loudspeaker systems over the years. [0003] These multi-channel implementations have also grown to include "surround sound" effects. Currently, such surround sound speaker audio systems have been applied in theaters, concert halls, automobiles, domestic cinemas and computer systems, or other similar places. Ho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04S5/00
CPCH04S2400/05H04S2400/07H04S5/00H04S5/005H04S1/002
Inventor 约翰·亚瑟安东尼奥·马特奥斯索尔
Owner DOLBY INTERNATIONAL AB
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