KR101828908B1 - Sound tracing apparatus and method of the same - Google Patents

Abstract

The present invention provides sound tracing device and method, which can improve the size of a sound path delay buffer. The sound tracing device comprises: a memory part including the sound path delay buffer which buffers, in advance, sound data to be played in the future; a sound processing part processing the sound data to be currently played; and a sound path processing part calculating a specific location of the sound path delay buffer based on a predetermined delay time for at least one path delay sound derived from a sound source, and generating path delay sound data related to the at least one path delay sound as the sound data to be played in the future.

Description

TECHNICAL FIELD [0001] The present invention relates to a sound tracing apparatus and method,

The present invention relates to a sound tracing technique, and more particularly, to a sound tracing apparatus and method capable of improving the size of a sound path delay buffer.

3D sound technology is a sound technology that uses a three-dimensional representation of geometric data stored in computing, and is widely used today in the field of movies, games, and virtual reality. In general, 3D graphics technology requires a separate, high-performance graphics processor due to its high computational complexity. In particular, a sound tracing technique capable of generating a realistic three-dimensional sound according to recent developments of a processor is being studied.

Sound Tracing is a method of applying the principles of Ray Tracing to sound, taking into account the effect of the transmission, absorption, refraction, refraction, or diffracted sound on other objects on the listener (or sound sink) Since the transmission, absorption, reflection, refraction, or diffraction effects are naturally provided, realistic 3D sound can be generated.

Sound tracing technology shoots a ray from a plurality of sound sources and shoots a ray from a celadon position, and each shot finds a geometric object that hits it and reflects, propagates, A ray corresponding to the diffraction is generated. The rays shot from the sound sources and the rays shot from the celadon can be met with each other, and the path to be encountered is called the success sound path. A successful sound path refers to a valid path through which a sound originating at a sound source location arrives at a listener through reflection, propagation, absorption, and diffraction. The final sound is calculated and output with the success sound path.

Korean Patent Laid-Open Publication No. 10-2016-0121778 (2016.10.20) relates to a computer-executable sound tracing method comprising the steps of: (a) determining a location of a sound source and a location of a sound sink on a current display screen; ) Generates at least one sound propagation path formed between the sound source and the sound sink and that can be distorted by at least one object on the display screen, and wherein the position of the sound source, the position of the sound sink, Processing the detection of the rate of change of the position of one object on-line; and (c) performing auralization on the sound based on the sound propagation path.

Korean Patent Registration No. 10-1270297 (Feb. 31, 2017) discloses a volume control apparatus for controlling a volume of pulse code modulation (PCM) data in an audio reproducing apparatus, A PCM data buffer reader for reading the decoded PCM data; a PCM data buffer processor for filtering and adjusting a specific band gain of the read PCM data; A volume adjusting unit for adjusting the volume of the overlapping filtered PCM data step by step when the filtering process is performed in duplicate, a PCM data storing unit for storing the PCM data with the volume adjusted, And an audio output unit converting the volume-adjusted PCM data into an audible signal and outputting the audible signal .

1. Korean Patent Publication No. 10-2016-0121778 (Oct. 20, 201) 2. Korean Patent No. 10-1270297 (2013.05.27)

An embodiment of the present invention seeks to provide a sound tracing apparatus and method capable of improving the size of a sound path delay buffer.

An embodiment of the present invention is to provide a sound tracing apparatus and method that can more efficiently reproduce the delay effect of sound.

Among the embodiments, the sound tracing apparatus includes a memory section including a sound path delay buffer for pre-buffering sound data to be reproduced in the future, a sound processing section for processing sound data to be reproduced at present, and a sound processing section for processing at least one path delay sound derived from the sound source And a sound path processing unit for calculating a specific position of the sound path delay buffer based on the predetermined delay time and generating path delay sound data relating to the at least one path delay sound as the sound data to be reproduced in the future.

The sound path delay buffer may include a PCM buffer module for buffering PCM (Pulse Code Modulation) data filtered from the sound source.

The sound path delay buffer may include a delay buffer module for accumulating the sound data to be reproduced at the calculated specific position.

The delay buffer module may have a circular structure in which its end position is connected to its start position.

The sound processing unit may mix the PCM data with at least one sound data buffered at a current playback position to generate the sound data to be played back.

The sound path processing unit may detect and exclude a path delay sound in which the delay time of each of the at least one path delay sound derived from the sound source exceeds the predetermined delay time, from the at least one path delay sound.

The sound path processing unit may calculate an accumulation index I indicating a specific position of the delay buffer module based on Equation 1 and buffer the sound data to be reproduced in the future according to the accumulation index.

[Equation 1]

I = S - (R * D)

(Where I denotes the accumulation index, S denotes the number of samples processed so far, R denotes a sampling rate, and D denotes the delay time)

The sound path processing unit may calculate the accumulation index for all channels for each of the frequency bands with respect to at least one path delay sound derived from the sound source and generate the sound data to be reproduced in the future.

The sound path processing unit performs processing on at least one of a diffuse sound, a reflection sound, a transparent sound, a direct sound, and a reverberation sound with respect to the derived at least one path delay sound to convert the path delay sound data into sound data to be reproduced in the future Can be generated.

In embodiments, the sound tracing device may include a memory portion including a sound path delay buffer including a delay buffer module for pre-buffering sound data to be played back in advance, and a memory portion including at least one of a delay time And a sound path processing unit for calculating a specific position of the sound path delay buffer based on the sound path delay sound and generating path delay sound data relating to the at least one path delay sound as the sound data to be reproduced in the future.

In embodiments, a method of sound tracing is performed by a sound tracing device that includes a sound path delay buffer, the method of sound tracing includes: a sound processing step of processing the sound data to be currently played back; at least one path delay sound A delay buffer position calculation step of calculating a specific position of the sound path delay buffer based on a predetermined delay time with respect to the at least one path delay sound, Processing step and a sound path delay buffering step of pre-buffering the sound data to be reproduced in the future.

The sound path delay buffering step may include buffering PCM (Pulse Code Modulation) data filtered from the sound source and accumulating the sound data to be reproduced at the calculated specific position.

The step of calculating the delay buffer position may include calculating an accumulation index (I) indicating a specific position of the delay buffer module based on Equation (1) below and buffering the sound data to be reproduced in the future according to the accumulation index .

[Equation 1]

I = S - (R * D)

(Where I denotes the accumulation index, S denotes the number of samples processed so far, R denotes a sampling rate, and D denotes the delay time)

The disclosed technique may have the following effects. It is to be understood, however, that the scope of the disclosed technology is not to be construed as limited thereby, as it is not meant to imply that a particular embodiment should include all of the following effects or only the following effects.

The sound tracing apparatus and method according to an embodiment of the present invention can improve the size of the sound path delay buffer.

The sound tracing apparatus and method according to an embodiment of the present invention can more effectively reproduce the delay effect of sound.

1 is a block diagram illustrating a sound tracing apparatus according to an embodiment of the present invention.
2 is a diagram illustrating the sound path delay buffer in FIG.
3 is a flow chart illustrating one embodiment of processing a sound path in the sound tracing apparatus of FIG.
4 is a flowchart illustrating one embodiment of processing a sound path in the sound tracing apparatus of FIG.

The description of the present invention is merely an example for structural or functional explanation, and the scope of the present invention should not be construed as being limited by the embodiments described in the text. That is, the embodiments are to be construed as being variously embodied and having various forms, so that the scope of the present invention should be understood to include equivalents capable of realizing technical ideas. Also, the purpose or effect of the present invention should not be construed as limiting the scope of the present invention, since it does not mean that a specific embodiment should include all or only such effect.

Meanwhile, the meaning of the terms described in the present application should be understood as follows.

The terms "first "," second ", and the like are intended to distinguish one element from another, and the scope of the right should not be limited by these terms. For example, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

It is to be understood that when an element is referred to as being "connected" to another element, it may be directly connected to the other element, but there may be other elements in between. On the other hand, when an element is referred to as being "directly connected" to another element, it should be understood that there are no other elements in between. On the other hand, other expressions that describe the relationship between components, such as "between" and "between" or "neighboring to" and "directly adjacent to" should be interpreted as well.

It is to be understood that the singular " include " or "have" are to be construed as including the stated feature, number, step, operation, It is to be understood that the combination is intended to specify that it does not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts, or combinations thereof.

In each step, the identification code (e.g., a, b, c, etc.) is used for convenience of explanation, the identification code does not describe the order of each step, Unless otherwise stated, it may occur differently from the stated order. That is, each step may occur in the same order as described, may be performed substantially concurrently, or may be performed in reverse order.

The present invention can be embodied as computer-readable code on a computer-readable recording medium, and the computer-readable recording medium includes any type of recording device that stores data that can be read by a computer system . Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. In addition, the computer-readable recording medium may be distributed over network-connected computer systems so that computer readable codes can be stored and executed in a distributed manner.

All terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, unless otherwise defined. Commonly used predefined terms should be interpreted to be consistent with the meanings in the context of the related art and can not be interpreted as having ideal or overly formal meaning unless explicitly defined in the present application.

1 is a block diagram illustrating a sound tracing apparatus according to an embodiment of the present invention.

Referring to FIG. 1, the sound tracing apparatus 100 may include a memory unit 110, a sound processing unit 120, a sound path processing unit 130, a control unit 140, and a sound output unit 150.

The memory 110 includes a sound path delay buffer 115 and includes a sound source PCM (Pulse Code Modulation) memory module (not shown), a success sound path memory module (not shown) And a resulting sound memory module (not shown).

The sound path delay buffer 115 pre-buffers the sound data to be reproduced in the future. This will be described with reference to FIG.

2 is a diagram for explaining a sound path delay buffer 115. FIG. The sound path delay buffer 115 may include a PCM buffer module 210, a delay buffer module 220, and an accumulation index 230.

The PCM buffer module 210 corresponds to a buffer capable of buffering PCM data filtered from a sound source. In one embodiment, the PCM buffer module 210 may be divided into a plurality of frequency bands, and each of the PCM buffer modules 210 may include PCM data separated by frequency bands for the purpose of independently processing the characteristics of the sound, Each can be buffered. For example, the number of PCM buffer modules 210 required may be determined by the number of pre-divided frequency bands multiplied by the number of processed sound sources, and thus a plurality of PCM buffer modules 210 may be arranged. Here, the PCM data corresponds to an unprocessed sound source, and the sound source can be read by a certain amount of necessary amount from an external memory (not shown) or a sound source PCM memory module of the memory unit 110. In one embodiment, the size of the PCM buffer module 210 may be determined in proportion to the number of PCM data read from the external memory or sound source PCM memory module of the memory 110 and the number of processed sound sources (e.g., , 128).

The delay buffer module 220 corresponds to a buffer capable of accumulating sound data to be reproduced at a specific position calculated in advance. The delay buffer module 220 determines that the accumulation index 230 is generated by the sound path processing unit 130 and outputs the path generated by the path processing unit 130 to its own specific position indicated by the accumulation index 230. [ The sound data to be reproduced in the future can be buffered in advance by accumulating the delayed sound data. In one embodiment, the delay buffer module 220 is divided into channels and a plurality of delay buffer modules 220 may be arranged. Here, the number of channels means the number of output audio channels. Accordingly, the number of required delay buffer modules 220 is proportional to the number of channels, and is independent of the number of frequency bands and the number of processed sound sources, thereby remarkably improving the overall size of the sound path delay buffer 115 .

In one embodiment, the size of the delay buffer module 220 may be determined in proportion to the sampling rate, the maximum delay time, and the number of channels. For example, if each of the delay buffer modules 220 has a sampling rate of 48 kHz and a maximum delay time of 0.5 seconds, the number of sound data of 48,000 samples / sec * 0.5 sec * 2 = 48,000 samples can be stored for each frequency band 48,000 * The size can be determined by the bit width of the sample. For example, if the bit width of the sample is 32-bit, it can be 48,000 * 32 = 1,536,000 bits. Here, the sampling rate means the number of audio samples to be processed in one second, and the maximum delay time may have a maximum value preset as a maximum delay time at which the success sound path can reach the listener.

The accumulation index 230 corresponds to a pointer indicating an index to be stored in the delay buffer module 220. In one embodiment, the accumulation index 230 may be indicative of a particular location of the delay buffer module 220 associated with the value when computed by the sound path processor 130 as a particular value. For example, if the accumulation index 230 is calculated as 133 by the sound path processing unit 130, the delay buffer module 220 may indicate the 133 th position in the delay buffer module 220, The buffering of the sound data can be started in advance from the 133 < th >

In one embodiment, the overall size of the sound path delay buffer 115 may be determined in proportion to the sampling rate, the number of channels, the maximum delay time, and the data type. For example, the overall size of the sound path delay buffer 115 may be set such that the sampling rate, the number of channels, the maximum delay time, the number of processing frequency band regions, the number of processed sound sources, and the data type are 48 kHz, Seconds, 4 regions, 5 sound sources, and 32-bit floating point, it can be determined as 377.5 kByte according to the following operation.

[Overall size of sound path delay buffer 115]

= (Total size of PCM buffer module 210) + (total size of delay buffer module 220)

= (48,000 * 2 * 0.5 * 32 * 2) + (128 * 5 * 32) = 3,072,000 bits

= 377.5 kBytes

As described above, the overall size of the sound path delay buffer 115 may increase in proportion to the sampling rate, the number of channels, the maximum delay time, and the data type, thereby significantly reducing the overall size have.

In one embodiment, the delay buffer module 220 may have a circular structure whose end position is followed by its start position. For example, the data at the 47,999th position, which is the end position of the delay buffer module 220, can be read out or buffered sequentially following the data at the 0th position, which is the start position, The accumulation index 230 indicating the end position of the storage unit 220 may also be calculated to indicate its starting position when referring to the next position.

The sound source PCM memory module corresponds to a memory space for storing unprocessed sound sources. The success sound path memory module corresponds to a memory space that stores information about a successful sound path that can be effectively formed from a sound source. Here, a successful sound path means a valid path through which a sound originating at a sound source position reaches the listener through reflection, propagation, absorption, and diffraction. The rendering information memory module corresponds to a memory space that stores information on a reverb render for processing reverberation. The resulting sound memory module corresponds to a memory space for storing the final sound. Here, the final sound may be calculated and output based on the success sound path. For example, sound data processed by the sound path processing unit 130 to which the reverberation effect according to the physical characteristics of the sound and the time- Sound data.

The sound processing unit 120 processes the sound data to be reproduced at present. The sound processing unit 120 can process the currently reproduced sound data buffered at the current processing position of the sound path delay buffer 115. [ The sound processing unit 120 may transmit the sound data to be reproduced to the sound memory module of the external memory or the memory unit 110 and may transmit the sound data to the sound output unit 150, To be output through the output terminal.

In one embodiment, the sound processing unit 120 may mix the filtered PCM data with at least one sound data buffered at the current playback position to generate sound data to be played back at present. For example, the sound processing unit 120 detects the most recently processed position in the delay buffer module 220 in relation to the filtered PCM data, and if not detected, the start position to the current playback position, It is possible to determine that the next position without the delay time is the current playback position. For example, the sound processing unit 120 combines at least one sound data buffered in the current playback position in the delay buffer module 220 and the filtered PCM data stored in the PCM buffer module 210 into one sound, It can be generated as sound data to be reproduced.

The sound path processing unit 130 calculates a specific position of the sound path delay buffer 115 based on a predetermined delay time with respect to at least one path delay sound derived from the sound source. The sound path processing unit 130 may receive information on the success sound path from the success sound path memory module of the memory unit 110 and may receive the PCM data stored in the PCM buffer module 210 based on the received success sound path , And each of the plurality of path delay sounds may include a delay time associated with each successive sound path.

In one embodiment, the predetermined delay time corresponds to the maximum delay time set in association with the sound source. For example, if the predetermined delay time is 0.5 second, the sound path processing unit 130 calculates a specific position of the delay buffer module 220 on the basis of the 0.5 second delay time, and the calculated position is delayed by the delay buffer module 220 It is possible to buffer the sound data to be reproduced in the future by being located behind the specific position interval in consideration of the time of the time relative to the position without the time (for example, the current reproduction position). For example, a first success sound path that goes straight on for PCM data stored in the PCM buffer module 210 is associated with a delay time of 0.1 second, a second success sound path that differs is associated with a 0.3 second delay time, When the third success sound path is associated with a delay time of 0.15 seconds, the sound path processing unit 130 calculates a specific position of the sound path delay buffer 115 based on 0.5 seconds when the predetermined delay time is 0.5 seconds, It is possible to pre-buffer the sound data to be reproduced to be generated based on each of the first, second and third success sound paths at the corresponding positions.

In another embodiment, the predetermined delay time corresponds to the delay time of each of the plurality of path delay sounds. For example, a first success sound path that goes straight on for PCM data stored in the PCM buffer module 210 is associated with a delay time of 0.1 second, a second success sound path that differs is associated with a 0.3 second delay time, When the third success sound path is associated with a delay time of 0.15 seconds, the sound path processing unit 130 calculates each specific position of the sound path delay buffer 115 based on each delay time, And to pre-buffer the sound data to be reproduced in the future based on each of the first, second and third success sound paths.

The sound path processing unit 130 generates path delay sound data relating to at least one path delay sound derived from the sound source as sound data to be reproduced in the future. In one embodiment, the sound path processing unit 130 may derive a plurality of path delay sounds associated with the success sound path with respect to each of the PCM data stored in the PCM buffer module 210 based on the success sound path. In one embodiment, the sound path processing unit 130 performs processing on at least one of a diffracted sound, a reflected sound, a transparent sound, a direct sound, and a reverberant sound with respect to at least one path delay sound derived from a sound source, As sound data to be reproduced in the future. The sound path processing unit 130 may cause the sound path delay buffer 115 to buffer the sound data to be reproduced at a specific position calculated in the future when the sound data to be reproduced is generated in the future.

In one embodiment, the sound path processing unit 130 detects a path delay sound in which at least one of the at least one path delay sound derived from the sound source exceeds a predetermined delay time, and excludes it from the at least one path delay sound . For example, the sound path processing unit 130 may be configured such that the first successful sound path that is linear with respect to the PCM data stored in the PCM buffer module 210 is associated with a delay time of 0.1 second, When the second success sound path is associated with a delay time of 0.6 seconds and the reflecting third success sound path is associated with a delay time of 0.15 seconds, a predetermined delay time Lt; RTI ID = 0.0 > sound < / RTI > The user can adjust the setting relating to the predetermined delay time through the control unit 140. [

The sound path processing unit 130 calculates an accumulation index I indicating a specific position of the delay buffer module 220 on the basis of the following Equation 1 so that the sound data to be reproduced in the future may be buffered according to the accumulation index have. Here, the accumulation index may indicate the start position of the delay buffer module 220 to buffer the sound data to be reproduced in the future.

[Equation 1]

I = S - (R * D)

(Where I represents the accumulation index, S represents the number of samples processed to date, R represents the sampling rate, and D represents the predetermined delay time)

For example, the sound path processing unit 130 may calculate the accumulation index of the processing frequency band M of the channel N based on Equation (1) above to accumulate sound data to be reproduced in the future, and the accumulation index is calculated as 132 It is possible to accumulate sound data to be played back in a predetermined size (for example, 128 bits, which is the size of the PCM buffer module 210), with the 133th position of the delay buffer module 220 as a start position. In one embodiment, the sound path processor 130 may apply a value that is a sum of the sampling rate if the computed accumulation index is less than zero.

The sound path processing unit 130 may calculate the accumulation index for all channels for each of the frequency bands with respect to at least one path delay sound derived from the sound source and generate sound data to be reproduced in the future. For example, the sound path processing unit 130 calculates the accumulation index of PCM data stored in each of the PCM buffer modules 210 by filtering by frequency bands, and generates a path related to a plurality of path delay sounds derived from the PCM data. The delayed sound data is generated as sound data to be reproduced in the future and is buffered in advance at a specific position of the delay buffer module 220 indicated by the calculated accumulation index. The calculation of the accumulation index, generation and buffering of sound data to be reproduced in the future Can be repeatedly performed for all channels by frequency band.

The control unit 140 controls the overall operation of the sound tracing apparatus 100 and controls the flow of the control or data between the memory unit 110, the sound processing unit 120, the sound path processing unit 130, and the sound output unit 150 Can be controlled.

The sound output unit 150 may receive sound from the sound path processing unit 130 and output the sound. For example, the sound output unit 150 may receive the sound data to be currently reproduced from the sound path processing unit 130, or may receive and output the final sound by the control unit 140. The user can control the sound output unit 150 through the control unit 140. [ In one embodiment, the sound output section 150 may be implemented as a speaker.

3 is a flow chart illustrating one embodiment of processing a sound path in the sound tracing apparatus of FIG.

The sound processing unit 120 processes the sound data to be reproduced at present (step S310).

The sound path processing unit 130 calculates a specific position of the sound path delay buffer 115 based on the predetermined delay time with respect to at least one path delay sound derived from the sound source (step S320).

The sound path processing unit 130 generates path delay sound data related to at least one path delay sound derived from the sound source as sound data to be reproduced in the future (step S330).

The sound path delay buffer 115 pre-buffers the sound data to be reproduced in the future (step S340).

4 is a flowchart illustrating one embodiment of processing a sound path in the sound tracing apparatus of FIG.

The sound path delay buffer 115 can read a required amount of PCM data from the memory unit 110 (step S410). For example, the sound path delay buffer 115 may read the PCM data stored in the sound source PCM memory module of the memory unit 110 to a required specific size.

The sound path delay buffer 115 may filter the read PCM data by frequency bands and buffer the read PCM data in each of the PCM buffer modules 210 classified by frequency bands (step S420).

The sound path processing unit 130 generates path delay sound data related to at least one path delay sound derived from the PCM data buffered in the PCM buffer module 210 as sound data to be reproduced in the future (step S430). For example, the sound path processing unit 130 performs processing on diffracted sound, reflected sound, transparent sound, direct sound, and reverberant sound with respect to the one path delay sound based on the information on the success sound path, The path delay sound data to which the physical effect is applied can be generated as sound data to be reproduced in the future.

The sound path processing unit 130 may calculate the accumulation index about the processing frequency band M of the channel N (step S440). For example, the sound path processing unit 130 calculates an accumulation index I indicating a specific position of the delay buffer module 220 on the basis of Equation (1) described above, and, based on the accumulation index, To be buffered.

When the accumulation index is calculated by the sound path processing unit 130, the sound path delay buffer 115 accumulates the sound data to be reproduced at a specific position of the delay buffer module 220 indicated by the accumulation index, (Step S450).

Steps S430 to S450 may be repeatedly performed. The controller 140 controls the sound tracing device 100 (100) so that S430 through S450 can be repeatedly performed so that the processes of the calculation of the accumulation indexes, the generation and buffering of the sound data to be reproduced, ) Can be controlled.

In one embodiment, the sound tracing apparatus 100 improves the structure to increase in proportion to the sampling rate, the number of channels, the maximum delay time, and the data type with respect to the overall size of the sound path delay buffer 115, Can be reduced.

In one embodiment, the sound tracing device 100 may improve the size of the sound path delay buffer 115 to more efficiently reproduce the delay effect of sound

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the present invention as defined by the following claims It can be understood that

100: Sound tracing device
110: memory unit
115: Sound path delay buffer
120: sound processor
130: Sound path processor
140:
150: sound output section
210: PCM buffer module
220: delay buffer module
230: accumulation index 230;

Claims (13)

A memory unit including a sound path delay buffer for pre-buffering sound data to be reproduced in the future;
A sound processing unit for processing sound data to be reproduced at present; And
Calculating a specific position of the sound path delay buffer based on a predetermined delay time with respect to at least one path delay sound derived from the sound source and outputting path delay sound data relating to the at least one path delay sound to the sound And a sound path processing unit for generating, as data,
The sound path delay buffer is sized in proportion to a sampling rate, a maximum delay time and a channel number, and a PCM buffer module for independently buffering PCM (Pulse Code Modulation) data filtered by frequency bands for each frequency band from the sound source And a delay buffer module for accumulating the sound data to be reproduced at the calculated specific position.
delete delete The apparatus of claim 1, wherein the delay buffer module
And the end position thereof is connected to the start position thereof, and has a circular structure.
The sound processing apparatus according to claim 1, wherein the sound processing section
Wherein the mixing unit mixes the at least one sound data buffered at the current playback position with the PCM data to generate the sound data to be played back.
The sound processing apparatus according to claim 1, wherein the sound path processing unit
Detecting a path delay sound in which at least one of the at least one path delay sounds derived from the sound source exceeds the predetermined delay time, and excludes the at least one path delay sound from the at least one path delay sound.
The sound processing apparatus according to claim 1, wherein the sound path processing unit
(I) indicating a specific position of the delay buffer module is calculated based on Equation (1), and the sound data to be reproduced in the future is buffered according to the accumulation index.
[Equation 1]
I = S - (R * D)
(Where I denotes the accumulation index, S denotes the number of samples processed so far, R denotes a sampling rate, and D denotes the delay time)
8. The apparatus of claim 7, wherein the sound path processing unit
Wherein the accumulation index is calculated for all channels for each of the frequency bands with respect to at least one path delay sound derived from the sound source, and the sound data to be reproduced is generated.
The sound processing apparatus according to claim 1, wherein the sound path processing unit
And processing the at least one of the diffused sound, the reflected sound, the transmitted sound, the direct sound, and the reverberation with respect to the derived at least one path delayed sound to generate the path delayed sound data as sound data to be reproduced in the future Sound tracing device.
A memory unit including a sound path delay buffer for pre-buffering sound data to be reproduced in the future; And
Calculating a specific position of the sound path delay buffer based on a predetermined delay time with respect to at least one path delay sound derived from the sound source and outputting path delay sound data relating to the at least one path delay sound to the sound And a sound path processing unit for generating, as data,
The sound path delay buffer is sized in proportion to a sampling rate, a maximum delay time and a channel number, and a PCM buffer module for independently buffering PCM (Pulse Code Modulation) data filtered by frequency bands for each frequency band from the sound source And a delay buffer module for accumulating the sound data to be reproduced at the calculated specific position.
A sound tracing method performed by a sound tracing device comprising a sound path delay buffer,
A sound processing step of processing sound data to be reproduced at present;
A delay buffer position calculating step of calculating a specific position of the sound path delay buffer based on a predetermined delay time with respect to at least one path delay sound derived from the sound source;
A sound path processing step of generating path delay sound data relating to the at least one path delay sound as sound data to be reproduced in the future; And
And a sound path delay buffering step of pre-buffering the sound data to be reproduced in the future,
Wherein the sound path delay buffering step comprises buffering PCM (Pulse Code Modulation) data filtered by frequency band from the sound source through the PCM buffer module independently for each of the frequency bands, and adjusting the sampling rate, the maximum delay time, Wherein the sound data to be reproduced is accumulated in the calculated specific position through a delay buffer module in which the sound data to be reproduced is determined.
delete 12. The method of claim 11, wherein the delay buffer position calculation step
Calculating an accumulation index (I) indicating a specific position of the delay buffer module based on Equation (1), and buffering the sound data to be reproduced in accordance with the accumulation index in advance Tracing method.
[Equation 1]
I = S - (R * D)
(Where I denotes the accumulation index, S denotes the number of samples processed so far, R denotes a sampling rate, and D denotes the delay time)

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