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Apparatus and method for synthesizing an output signal

一种输出信号、信号的技术，应用在合出显现输出信号领域，能够解决不良立体音影像质量、无叙明矩阵变换联合最佳组合、功能无效率等问题，达到节省内存及计算资源的效果

Active Publication Date: 2010-08-18
DOLBY INT AB +1
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  • Abstract
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Problems solved by technology

However, none of the prior art addresses the joint optimal combination of matrix transformation and decorrelation
Simple combinations of prior art methods lead to inefficient and inelastic use of the functionality provided by multi-channel object downmixing, or poor stereoscopic audiovisual quality in final object decoder presentation

Method used

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  • Apparatus and method for synthesizing an output signal
  • Apparatus and method for synthesizing an output signal
  • Apparatus and method for synthesizing an output signal

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Abstract

An apparatus for synthesizing a rendered output signal having a first audio channel and a second audio channel includes a decorrelator stage (356) for generating a decorrelator signal based on a downmix signal, and a combiner (364) for performing a weighted combination of the downmix signal and a decorrelated signal based on parametric audio object information (362), downmix information (354) andtarget rendering information (360). The combiner solves the problem of optimally combining matrixing with decorrelation for a high quality stereo scene reproduction of a number of individual audio objects using a multichannel downmix.

Description

technical field The invention relates to combining a presentation output signal such as a stereo output signal or an output signal with more audio signals based on available multi-channel downmix and additional control data. Specifically, the multi-channel downmix is ​​a downmix of multiple audio object signals. Background technique Recent developments in audio facilitate the reconstruction of multi-channel representations of audio signals based on stereo (or mono) signals and corresponding control data. These parametric surround coding methods usually involve a parametric approach. A parametric multi-channel audio codec (such as the MPEG Surround codec defined in ISO / IEC 23003-1 [1], [2]) reconstructs the M channel from the K transport data by using additional control data. The control data includes IID (Inter-Channel Intensity Difference) and ICC (Inter-Channel Coherence) based multi-channel signal parameterization. These parameters are usually extracted at the encoding...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00H04S3/02
CPCH04S1/007H04S2400/01G10L19/008G10L19/00
Inventor J·安德加尔德L·维莱摩尔斯H·普恩哈根B·瑞许C·法尔克J·赫尔J·席尔佩尔特A·阿尔雷尔L·泰伦特夫
Owner DOLBY INT AB
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