Parametric stereo conversion system and method

A parametric stereo and stereo technology, applied in the field of audio encoders, can solve problems such as unsatisfactory audio artifacts and unsatisfactory audio artifacts for listeners

Inactive Publication Date: 2011-07-20
DTS BVI
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Problems solved by technology

If the phase data is simply removed, then it will produce audio artifacts with only amplitude data which will lead to unsatisfactory listeners
Some systems, such as Advanced Audio Coding (AAC) systems, utilize sideband information used by the receiver to compensate for phase data cancellation, but these systems require the user to have a specific receiver that can handle the sideband data, and there are Unsatisfactory audio artifacts that can arise when noise signals are introduced into the sideband data

Method used

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Embodiment Construction

[0018] In the following description, similar parts are denoted by the same reference numerals in the specification and drawings. For the sake of clarity, the drawings are not drawn to scale and certain components may be shown in generalized or schematic form and identified by trade names.

[0019] figure 1 is a diagram of a system 100 for converting multi-channel audio data with phase and magnitude data into multi-channel audio data with only magnitude data, such as parametric stereo, according to an exemplary embodiment of the present invention. The system 100 recognizes the phase difference of left and right channel sound data and converts the phase difference into a magnitude difference to produce stereo image data with only intensity or magnitude data. Similarly, additional channels may also or alternatively be used where appropriate.

[0020] System 100 receives time domain right channel audio data at time frequency conversion system 102 and receives time domain left ch...

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Abstract

A system for generating parametric stereo data from phase modulated stereo data is provided. A phase difference system receives left channel data and right channel data and determines a phase difference between the left channel data and the right channel data. A phase difference weighting system receives the phase difference data and generates weighting data to adjust left channel amplitude data and right channel amplitude data based on the phase difference data. A magnitude modification system adjusts the left channel amplitude data and the right channel amplitude data using the weighting data to eliminate phase data in the left channel data and the right channel data.

Description

[0001] related application [0002] This application claims priority to US Provisional Application 60 / 965,227, filed August 17, 2007, entitled "ParametricStereo Conversion System and Method," which is hereby incorporated by reference for all purposes. technical field [0003] The present invention relates to the field of audio encoders, and more particularly, to methods for conditioning multi-channel audio with magnitude and phase data without producing audio artifacts or other noise that can occur when the phase data is ignored. data to compensate for changes in phase data for magnitude data to allow systems and methods for transmitting magnitude data for each channel only. Background technique [0004] Multi-channel audio coding techniques that eliminate phase data from an audio signal containing phase and magnitude data are known in the prior art. These techniques include using parametric stereo to simulate the difference in magnitude between the left and right channel s...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G10L19/00G10L19/008G10L19/16
CPCG10L19/173G10L19/008
Inventor J·汤普森R·瑞姆斯A·沃纳
Owner DTS BVI
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