Matrix decoder with constant-power pairwise panning

A matrix coefficient, level difference technology, applied in the spatial/structural arrangement of speakers, electrical components, stereo systems, etc., can solve problems such as affecting audio quality and inaccuracy

Active Publication Date: 2016-05-18
DTS
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Due to this interpolation, translation positions falling between precise points will be imprecise and adversely affect audio quality

Method used

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  • Matrix decoder with constant-power pairwise panning
  • Matrix decoder with constant-power pairwise panning
  • Matrix decoder with constant-power pairwise panning

Examples

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Embodiment Construction

[0039] In the following description of embodiments of the constant power pairwise panning upmixing system and method, reference is made to the accompanying drawings. These figures are shown by way of illustration of a specific example of how an embodiment of a constant power pairwise pan upmixing system and method may be practiced. It is to be understood that other embodiments may be utilized and structural changes may be made without departing from the scope of the claimed subject matter.

[0040] I. System Overview

[0041] Embodiments of the constant power pairwise panning upmixing system and method upmix a two-channel input audio signal to a multi-channel output audio signal having more than two channels using a closed-form solution to accurately determine the solution matrix coefficient. These dematrix coefficients are used to weight each of the two input channels and determine how much of each input channel is included in each output channel. Embodiments of the cons...

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Abstract

A constant-power pairwise panning upmixing system and method for upmixing from a two-channel stereo signal to a multi-channel surround sound (having more than two channels). Each output channel is some combination of the two input channels. Closed-form solutions are used to calculate dematrixing coefficients that are used to weight each input channel. The dematrixing coefficients are computed based on an inter-channel level difference and an inter-channel phase difference between the two input signals. The weighted input channels then are mixed uniquely for each output channel to generate a surround sound output from the stereo input signal. Each dematrixing coefficient has an in-phase component and an out-of-phase component. The phase coefficients for each component vary in time and are based on the phase difference between the input signals. The resultant surround sound output faithfully simulates the audio content as originally mixed.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to U.S. Patent Application 14 / 447,516, filed July 30, 2014, entitled "MATRIXDECODERWITHCONSTANT-POWERPAIRWISEPANNING," which was filed July 30, 2013, and entitled "MATRIXDECODERWITHCONSTANT-POWERPAIRWISEPANNING" Nonprovisional Patent Application of US Provisional Patent Application Serial No. 61 / 860,024, the entire contents of both patent applications are hereby incorporated by reference. Background technique [0003] Many audio reproduction systems are capable of recording, transmitting and reproducing simultaneous multi-channel audio, sometimes referred to as "surround sound". While entertainment audio began with the simplistic monophonic system, it quickly developed two-channel (stereo) and higher channel-count formats (surround) in an attempt to capture a convincing spatial image and realize listener immersion. Specifically, surround sound is a technique for enhancing the reproducti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04R5/02
CPCH04R2227/003H04S3/02H04S2400/03H04S2400/07H04S2400/13
Inventor J·汤普森
Owner DTS
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