KR101645515B1 - 3-dimensional sound source evaluation apparatus and method - Google Patents

3-dimensional sound source evaluation apparatus and method Download PDF

Info

Publication number
KR101645515B1
KR101645515B1 KR1020150069604A KR20150069604A KR101645515B1 KR 101645515 B1 KR101645515 B1 KR 101645515B1 KR 1020150069604 A KR1020150069604 A KR 1020150069604A KR 20150069604 A KR20150069604 A KR 20150069604A KR 101645515 B1 KR101645515 B1 KR 101645515B1
Authority
KR
South Korea
Prior art keywords
sound source
dimensional
evaluation
user command
unit
Prior art date
Application number
KR1020150069604A
Other languages
Korean (ko)
Inventor
강상길
황재민
김정혁
Original Assignee
인하대학교 산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 인하대학교 산학협력단 filed Critical 인하대학교 산학협력단
Priority to KR1020150069604A priority Critical patent/KR101645515B1/en
Application granted granted Critical
Publication of KR101645515B1 publication Critical patent/KR101645515B1/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04S—STEREOPHONIC SYSTEMS 
    • H04S7/00—Indicating arrangements; Control arrangements, e.g. balance control
    • H04S7/30—Control circuits for electronic adaptation of the sound field
    • H04S7/301—Automatic calibration of stereophonic sound system, e.g. with test microphone

Abstract

A three-dimensional sound source evaluation apparatus and method are disclosed. The three-dimensional sound source evaluation apparatus includes an input unit for receiving a user command including a criterion for selection and evaluation of a sound source, and a control unit for generating and evaluating a three-dimensional sound source according to the received user command, A sound source selecting unit for selecting a sound source included in a selection criterion of the user command, a sound source mixing unit for mixing a selected sound source with a three dimensional sound source effect to generate a three dimensional sound source, And a sound source evaluation unit for performing performance evaluation based on criteria.

Description

[0001] The present invention relates to a three-dimensional sound source evaluation apparatus and method,

The present invention relates to a sound source evaluation apparatus, and more particularly, to a three-dimensional sound source evaluation apparatus and method.

Recently, development of acoustic equipment industry and stereoscopic sound system combined with 3D stereoscopic image have been getting attention. The interest in stereoscopic sound is not limited to just one medium, but it will be reflected in various multimedia media such as TV, mobile phone, movie theater, and game. Due to the development of multimedia communication, it is evolving from the technology of multimedia reproduction development to the technology which can be realized according to the emotion of the listener, the taste, and the user can actively reproduce.

Therefore, in the modern society, three - dimensional stereo sound is generated and it is evaluated whether such stereo sound is well - made according to the evaluation standard. Demand for 3D stereo is increasing, and measurable systems are making much progress. In particular, systems capable of evaluating the sound quality of 3D audio have been developed, and a lot of research has actually been done.

However, the present technologies do not have a criterion for judging the state of a three dimensional sound source with the obtained data, but are provided only with a sound source database, or provided with an evaluation means only or limitedly with limited data.

This is because the evaluation criteria vary depending on the evaluation standards of each country, the criteria applied to the evaluation on the three dimensional sound source, or the type or purpose of the three dimensional sound source. Therefore, there is a demand for a system that quantitatively and objectively evaluates the quality of three-dimensional stereo sound produced by an acoustic measurement device, and stores and manages sound sources through a database system.

Korean Patent Laid-Open Publication No. 10-2010-0087928 relates to a method and an apparatus for evaluating sound quality of an audio signal by selecting an optimum sound quality evaluator according to the number of channels of an audio signal.

Korean Patent Registration No. 10-0829870 discloses a sound quality of a multi-channel audio compression codec for measuring the degree to which an audio signal encoded and decoded by a multi-channel audio compression codec generates audible sound quality deterioration in comparison with an original signal before compression. An evaluation apparatus and a method thereof.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an apparatus and a method for evaluating a three dimensional sound source, which can not only measure the completeness of a sound source but also evaluate evaluation results in real time.

It is another object of the present invention to provide an apparatus and method for estimating a three dimensional sound source, which is updated by adding or modifying sound source evaluation criteria.

In order to achieve the above object,

The three-dimensional sound source evaluating apparatus according to the present invention comprises:

An input unit for receiving a user command including a criterion for selection and evaluation of a sound source, and a controller for generating and evaluating a three-dimensional sound source according to the received user command, A sound source selecting unit for selecting a sound source included in the reference, a sound source mixing unit for mixing a selected sound source with a three-dimensional sound source effect to generate a three-dimensional sound source, And a sound source evaluation unit that performs performance evaluation based on evaluation criteria.

And a database for storing the sound source and the three-dimensional sound source.

Wherein the sound source selecting unit searches the sound source according to the user command from the database and selects at least one of the searched sound sources.

The sound source mixing unit mixes the selected sound source and the three-dimensional sound source effect at least once to generate a three-dimensional sound source.

The sound source evaluating unit detects a reference sound source corresponding to the evaluation reference and analyzes the similarity between the detected reference sound source and the three dimensional sound source.

According to the present invention, there is provided a method of evaluating a three-

Receiving a user command including a criterion for evaluating a sound source, selecting a sound source included in the selection criterion of the received user command, mixing the selected sound source with the three-dimensional sound source effect, And a step of performing performance evaluation of the generated three-dimensional sound source according to an evaluation criterion of the user command.

According to the apparatus and method for evaluating a three dimensional sound source according to the present invention, not only the completeness of a sound source but also the evaluation result can be known in real time.

It can also be updated by adding or modifying source criteria.

1 is a block diagram for explaining a 3D stereoscopic sound source evaluating apparatus according to an embodiment of the present invention.
2 is a block diagram illustrating a control unit according to an embodiment of the present invention.
3 is a block diagram illustrating a database according to an embodiment of the present invention.
4 is a flowchart illustrating a method of evaluating a 3D sound source according to an exemplary embodiment of the present invention.
5 is a flowchart illustrating a sound source selection method according to an embodiment of the present invention.
FIG. 6 is a flowchart illustrating a sound source evaluation method according to an embodiment of the present invention.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the drawings, the same reference numerals as used in the appended drawings denote like elements, unless indicated otherwise. In the following description of the present invention, a detailed description of known functions and configurations incorporated herein will be omitted when it may make the subject matter of the present invention rather obvious or understandable to those skilled in the art.

1 is a block diagram for explaining a 3D stereoscopic sound source evaluating apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the three-dimensional sound source evaluating apparatus 1 not only measures the completeness of sound sources but also real-time evaluation results. The three-dimensional sound source evaluation device 1 can be updated by adding or modifying sound source evaluation criteria. The three-dimensional sound source evaluation apparatus 1 may be a personal computer system such as a desktop, a laptop, a tablet, or a handheld computer.

 The three-dimensional sound source evaluation apparatus 1 includes an input unit 110, a control unit 120, an output unit 130, and a database 140.

The input unit 110 receives a user command including a criterion for selecting and evaluating a sound source. The criterion is a specification for a criterion for selecting a sound source and a criterion for a criterion for evaluation. The input unit 110 receives a user command for adding or modifying the reference.

Also, the input unit 110 may receive a user command to add a new sound source or delete a sound source stored in the database 140, which will be described later. In particular, when adding a new sound source, the input unit 110 can also receive the new sound source along with the user command.

The control unit 120 generates a three-dimensional sound source according to a user command received from the input unit 110. The control unit 120 compares the generated three-dimensional stereoscopic sound source with the reference sound source to calculate the similarity. The controller 120 determines the performance of the 3D sound source using the calculated similarity.

The output unit 130 displays the result of the performance of the three-dimensional sound source determined by the controller 120. [ The output unit 130 outputs the three-dimensional stereoscopic sound source generated by the controller 120 and the sound source stored in the database 140 so that the user can listen to the sound source. The output unit 130 includes a display device such as a liquid crystal, a monitor, a projector, a printer, and the like, and includes an auditory device such as a speaker, an earphone, and a headset.

The database 140 stores sound sources and three-dimensional sound sources. The database 140 is managed by individually storing the sound source and the three-dimensional sound source. At this time, the sound source and the three-dimensional sound source include metadata, and they can be identified by data.

The database 140 stores the 3D sound effects. The three-dimensional stereo sound effects include source separation, artificial reverberation, cross-talk cancellation, voice source location, and the like.

For example, in the case of a sound source separation effect, a user can select a sound source mixed with a violin and a piano in a database, output a sound source, and then apply a sound source separation effect to create a sound source having only a violin.

In the case of artificial reverberation, artificial reverberation can be applied to a violin recorded in an anechoic chamber to create a sound source that has the same effect as in a concert hall.

In the case of crosstalk cancellation, applying a crosstalk cancellation effect to a recorded violin sound source at a concert hall can produce a crosstalk-canceled sound source such as a violin recorded in an echo chamber.

2 is a block diagram illustrating a control unit according to an embodiment of the present invention.

Referring to FIG. 2, the controller 120 includes a sound source selection unit 210, a sound source mixing unit 220, and a sound source evaluation unit 230.

The sound source selection unit 210 selects a sound source included in the criterion of the user command received from the input unit 110. The sound source selection unit 210 searches the sound source in the database 140 according to the reference specification included in the user command. That is, the sound source selecting unit 210 can search for sound sources that meet the reference specifications such as genre, musical instrument type, recording place, and beat. At this time, the sound source selection unit 210 can assign a weight to each item corresponding to each reference specification.

Accordingly, the sound source selection unit 210 may search the sound source corresponding to the reference specification first, and quantize the searched sound source by applying a weight to each item. The numerical value can be numerically expressed as 1 to 10 points, and the score to be scored can be set differently depending on the situation.

In this way, the sound source selection unit 210 arranges and selects the sound sources most suitable for the user command in ascending or descending order. The sound source selecting unit 210 selects the sorted sound sources. At this time, when the number of sound source selection included in the user command is set, the sound source selection unit 210 can select a sound source by the set number of the sound source selection. Accordingly, the sound source selection unit 210 can select at least one sound source.

The sound source mixing unit 220 mixes the sound source and the three-dimensional sound source effect selected by the sound source selection unit 210. The sound source mixing unit 220 mixes the sound source and the three-dimensional sound source effect at least once.

The sound source mixing unit 220 may mix the sound sources to generate a new sound source, and then mix the three-dimensional sound source effects again to generate a three-dimensional sound source. The sound source mixing unit 220 performs mixing using a wav convolution filter of MATLAB.

In this case, the sound source mixed in the sound source mixing unit 220 or the generated three-dimensional sound source can be output to the user through the output unit 140 in real time.

The sound source evaluating unit 230 performs the performance evaluation of the three-dimensional sound source generated by the sound source mixing unit 220 according to the evaluation criteria of the user command. The sound source evaluating unit 230 detects the reference sound source corresponding to the evaluation reference and analyzes the similarity between the detected reference sound source and the three-dimensional sound source.

Here, the sound source evaluating unit 230 can automatically detect the reference sound source. The sound source evaluating unit 230 may analyze the evaluation criteria and detect the sound source having the average point of the item with respect to the evaluation criteria as the reference sound source.

The sound source evaluating unit 230 compares and analyzes the similarity between the reference sound source and the three-dimensional sound source in terms of quantitative values and performs performance evaluation. The sound source evaluating unit 230 may use at least one of a BSS eval (Bind source separation evaluation), a sound quality assessment material (SQM), and a spatial profile to measure the degree of similarity.

The BSS eval is a method for quantitatively evaluating a separated source. The basic principle is as shown in Equation (1).

Figure 112015047810011-pat00001

here,

Figure 112015047810011-pat00002
Is an estimated image,
Figure 112015047810011-pat00003
Means a true image,
Figure 112015047810011-pat00004
Refers to spatial distortion,
Figure 112015047810011-pat00005
Quot; means interference, and "
Figure 112015047810011-pat00006
Refers to artifacts.

Figure 112015047810011-pat00007

here,

Figure 112015047810011-pat00008
Means a part of the sound source to be evaluated,
Figure 112015047810011-pat00009
Means an ideal sound source.

The sound source evaluating unit 230 derives values of spatial distortion, interference, and artificial effect as shown in Equation (2) through comparison between the source and the estimated sound source.

Also, the sound source estimating unit 230 may calculate the SIR (Source to Interference Ratio), the SIR (Source to Artifacts Ratio), and the SDR (Signal to Distortion Ratio) based on Equation (1) Value is derived as an evaluation criterion as shown in [Equation 3].

Figure 112015047810011-pat00010

As shown in Equation (3), the sound source evaluating unit 230 calculates the ISR as an elementary value / spatial distortion value, calculates SIR as an elementary value + spatial distortion value / interference value, Distortion value + interference value / artificial effect value. In particular, the sound source evaluation unit 230 calculates the SDR as an elementary value / total error value. The total error value is a sum of the spatial distortion value, the interference value, and the artificial effect value.

Therefore, the sound source evaluating unit 230 can calculate the error ratio by comparing the source and the estimated sound source.

The sound source evaluating unit 230 quantitatively quantizes the degree of similarity by a score of 10, and the degree of similarity can be evaluated by 1 to 3 points below, 4 to 6 for ordinary, 7 to 9 for excellent, and 10 for excellent . The sound source evaluating unit 230 is not limited to the above-described example, and it is possible to set the quantitative evaluation to suit the situation.

For example, in the case of a violin three-dimensional stereo sound source to which the sound source separation effect is applied, the sound source evaluation unit 230 evaluates the similarity between the sound source and the reference sound source in which only the violin is recorded in the same space.

In the case of the violin three-dimensional stereo sound source to which the artificial reverberation effect is applied, the sound source evaluation unit 230 actually evaluates the similarity of the recorded violin with the reference sound source in the concert hall.

In the case of a violin three-dimensional stereo sound source to which the crosstalk cancellation effect is applied, the sound source evaluation unit 230 evaluates the similarity of the recorded violin with the reference sound source in the echo room.

3 is a block diagram illustrating a database according to an embodiment of the present invention.

Referring to FIG. 3, the database 140 separately stores raw source data 310, machining source data 320, and metadata 330.

The raw source data 310 is a space in which unmixed sound sources are stored, and includes an unirradiated sound source, a room impulse response sound source, and a head transfer function sound source.

Unfractionated sound source means a sound source recorded in an anechoic room. Here, the anechoic room is a room designed so that the bottom, the ceiling, and the surrounding wall are all built in as a sound absorbing material to reduce the reflection of sound.

The room impulse response sound source means a sound source in which the impulse response is recorded in the room. Here, the impulse response is the response to the system when the impact is applied.

Head-transfer function Sound source means sound source recorded with effect like stereo sound. Here, the head transfer function allows stereo sound to be heard with a headphone, such as a 5.1-channel speaker.

The processing source data 320 stores a three-dimensional sound source generated by mixing an intense sound source, an impulse response sound source, and a head transfer function sound source included in the original source data 310.

The metadata 330 stores raw source data and metadata included in the processed source data. Thus, raw source data and machining source data can include structured metadata about the data so that the data can be easily categorized.

4 is a flowchart illustrating a method of evaluating a 3D sound source according to an exemplary embodiment of the present invention.

Referring to FIG. 4, the three-dimensional sound source evaluation method not only measures the state and quality of a three-dimensional sound source, but also evaluates the sound source in a simple and real-time manner in real time. Three dimensional stereo sound source evaluation method can evaluate the sound sources even if the evaluation criteria for the sound sources are changed. The evaluation also displays the results and provides them to the user using graphs, tables, and the like.

The three-dimensional sound source evaluation method is largely divided into three stages, which are performed in the following order through the three-dimensional sound source evaluation apparatus 1.

The first step is to select a sound source according to a user command (S100). The first step is to search the sound source in the database 140 according to the reference specification included in the user command. The first step selects at least one of the searched sound sources.

The second step mixes the selected sound source and the three-dimensional stereo sound effect (S110). In the second step, a three-dimensional sound source is generated by mixing the sound source selected in the first step and the three-dimensional sound source effect stored in the database 140. In this case, the second stage mixes the sound source and the three-dimensional stereo sound effect at least once.

In the third step, performance evaluation of the three-dimensional sound source is performed (S120). In the third step, the 3D sound source generated in the second step is compared with the reference sound source. In the third step, the similarity is quantitatively quantified, and the performance is evaluated objectively. The third step displays providing the evaluated result to the user.

5 is a flowchart illustrating a sound source selection method according to an embodiment of the present invention.

Referring to FIG. 5, the first step performs a refinement step according to the following procedure.

The first step is to receive a user command (S200). The first step receives a user command from the input unit 110. The user command includes an instruction to indicate a criterion for selection and evaluation of the sound source.

The first step is to search the sound source from the database (S210). In the first step, the sound source corresponding to the selection criterion of the user command is searched in the database 140. The first step is to search for sound sources that meet the standard specifications such as genre, instrument type, recording location, and beat.

The first step is to select at least one sound source (S220). In the first step, the searched sound sources are digitized, and the points of each sound sources are designated, and the sound sources are sorted in ascending or descending order. If the number of selected sound sources is set, the first step selects the sound sources according to the selected order according to the sorted order.

FIG. 6 is a flowchart illustrating a sound source evaluation method according to an embodiment of the present invention.

Referring to FIG. 6, the third step performs a refinement step according to the following procedure.

In the third step, an evaluation criterion of the three-dimensional sound source is selected (S300). The third step selects evaluation criteria according to the evaluation criteria contained in the user command. The criteria may be performance such as source separation, crosstalk rejection, artificial reverberation, and the like.

Here, the sound source separation evaluates the degree of sound source separation, the crosstalk elimination evaluates the degree of crosstalk cancellation, and the artificial reverberation evaluates the degree of implementation of artificial reverberation. Each performance can be applied evaluation criteria such as BSS eval, SQM, spatial overview.

In the third step, the reference sound source is selected (S310). The third step is to analyze the selected evaluation criterion and detect the sound source having the average point of the criterion as the reference sound source.

In the third step, similarity between the three-dimensional sound source and the reference sound source is analyzed (S320). In the third step, the similarity between the reference sound source and the 3D stereo sound source is quantitatively analyzed and compared. The third step displays the result of the analyzed performance evaluation to the user.

The present invention can also be embodied as computer-readable codes on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer apparatus is stored. Examples of the computer-readable recording medium include a hard disk, a ROM, a RAM, a CD-ROM, a hard disk, a magnetic tape, a floppy disk, an optical data storage device, And the like.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is clearly understood that the same is by way of illustration and example only and is not to be taken by way of limitation in the embodiment in which said invention is directed. It will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the scope of the appended claims.

1: 3D stereoscopic sound source evaluation device
110: input unit
120:
130:
140: Database
210: Sound source selection unit
220: sound source mixing unit
230: sound source evaluation unit
310: raw source data
320: machining source data
330: Metadata

Claims (6)

An input unit receiving a user command including a criterion for selecting and evaluating a sound source; And
And a controller for generating and evaluating a three-dimensional sound source according to the received user command,
Wherein,
A sound source selection unit for selecting a sound source included in the selection criterion of the received user command;
A sound source mixing unit for mixing the selected sound source with a three-dimensional sound source effect to generate a three-dimensional sound source; And
And a sound source evaluation unit which performs performance evaluation of the generated three-dimensional sound source according to evaluation criteria of the user command,
Wherein the sound source evaluation unit
Wherein the reference sound source corresponding to the evaluation criterion is detected and the degree of similarity between the detected reference sound source and the three-dimensional sound source is analyzed.
The method according to claim 1,
And a database for storing the sound source and the three-dimensional sound source.
3. The method of claim 2,
Wherein the sound source selection unit comprises:
Searching the sound source according to the user command from the database, and selecting at least one of the searched sound sources.
The method according to claim 1,
Wherein the sound source-
Wherein the selected sound source and the three-dimensional sound source effect are mixed at least once to generate a three-dimensional sound source.
delete Receiving a user command including a criterion for evaluating a sound source;
Selecting a sound source included in the selection criterion of the received user command;
Generating a three-dimensional sound source by mixing the selected sound source with a three-dimensional sound source effect; And
And performing the performance evaluation of the generated three-dimensional stereoscopic sound source on the basis of the evaluation criterion of the user command,
Wherein the performance evaluation comprises:
Wherein the reference sound source corresponding to the evaluation criterion is detected and the degree of similarity between the detected reference sound source and the three-dimensional sound source is analyzed.

KR1020150069604A 2015-05-19 2015-05-19 3-dimensional sound source evaluation apparatus and method KR101645515B1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020150069604A KR101645515B1 (en) 2015-05-19 2015-05-19 3-dimensional sound source evaluation apparatus and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020150069604A KR101645515B1 (en) 2015-05-19 2015-05-19 3-dimensional sound source evaluation apparatus and method

Publications (1)

Publication Number Publication Date
KR101645515B1 true KR101645515B1 (en) 2016-08-05

Family

ID=56711372

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020150069604A KR101645515B1 (en) 2015-05-19 2015-05-19 3-dimensional sound source evaluation apparatus and method

Country Status (1)

Country Link
KR (1) KR101645515B1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109716794A (en) * 2016-09-20 2019-05-03 索尼公司 Information processing unit, information processing method and program

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101495879B1 (en) * 2013-12-27 2015-02-25 광운대학교 산학협력단 A apparatus for producing spatial audio in real-time, and a system for playing spatial audio with the apparatus in real-time

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101495879B1 (en) * 2013-12-27 2015-02-25 광운대학교 산학협력단 A apparatus for producing spatial audio in real-time, and a system for playing spatial audio with the apparatus in real-time

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109716794A (en) * 2016-09-20 2019-05-03 索尼公司 Information processing unit, information processing method and program

Similar Documents

Publication Publication Date Title
KR102642275B1 (en) Augmented reality headphone environment rendering
RU2625953C2 (en) Per-segment spatial audio installation to another loudspeaker installation for playback
JP5149968B2 (en) Apparatus and method for generating a multi-channel signal including speech signal processing
RU2613731C2 (en) Device for providing audio and method of providing audio
CN105900457B (en) The method and system of binaural room impulse response for designing and using numerical optimization
KR101705960B1 (en) Three-dimensional sound compression and over-the-air transmission during a call
US20190327573A1 (en) Sound field forming apparatus and method, and program
US9554227B2 (en) Method and apparatus for processing audio signal
Schoeffler et al. Evaluation of spatial/3D audio: Basic audio quality versus quality of experience
Grimm et al. Spatial acoustic scenarios in multichannel loudspeaker systems for hearing aid evaluation
JP2013523006A (en) Stereo sound reproduction method and apparatus
US10869151B2 (en) Speaker system, audio signal rendering apparatus, and program
WO2022014326A1 (en) Signal processing device, method, and program
KR101645515B1 (en) 3-dimensional sound source evaluation apparatus and method
Bergner et al. Identification of discriminative acoustic dimensions in stereo, surround and 3D music reproduction
KR102231755B1 (en) Method and apparatus for 3D sound reproducing
US20210105571A1 (en) Sound image reproduction device, sound image reproduction method, and sound image reproduction program
JPWO2010119572A1 (en) Surround signal generating apparatus, surround signal generating method, and surround signal generating program
JPWO2018066384A1 (en) Signal processing apparatus and method, and program
JP6998823B2 (en) Multi-channel objective evaluation device and program
Holbrook Sound objects and spatial morphologies
Tang et al. Dynamic sound field synthesis for speech and music optimization
Liu et al. Objective quality measurement in multi-channel audio systems by multivariate adaptive regression splines model
JP7083405B2 (en) Audio signal processors, systems and methods that distribute ambient signals across multiple ambient signal channels.
Delgado et al. Influence of binaural processing on objective perceptual quality assessment

Legal Events

Date Code Title Description
E701 Decision to grant or registration of patent right