WO2014058138A1 - Audio encoding/decoding device using reverberation signal of object audio signal - Google Patents

Description

Audio encoding / decoding device using reverberation signal of object audio signal

The following description relates to an audio encoding / decoding apparatus using a reverberation signal of an object audio signal, and more particularly to an audio encoding / decoding apparatus using an audio signal including a reverberation signal of an object audio signal. will be.

In the conventional method of constructing a sound scene, MPEG SOC (Spatial Audio Object Coding) and Dolby Atmos respectively construct a sound scene using an input signal or an object.

MPEG SAOC regards the input audio signal as an object and receives the corresponding input audio signal. The MPEG SAOC constitutes an audio scene with respect to input rendering information. In particular, MPEG SAOC can be transmitted at a low bit rate and uses spatial audio coding as a high compression method.

In addition, Dolby Atmos is a multi-channel audio format for theater, and transmits or stores a channel signal called Beds and an object signal called object, and composes a sound scene using metadata.

However, since such a conventional method configures a sound scene using an input audio signal or an object signal, a case in which a sound scene that does not correspond to the intention of the content according to the input audio signal or the object signal occurs. This is because it includes only basic signals for constructing an acoustic scene.

Therefore, a method for constructing an accurate sound scene in response to the intention of the content according to the input audio signal or the object signal should be devised.

In reproducing a multi-channel audio signal, an audio encoding / decoding device capable of reproducing a more effective and realistic audio signal by using a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal is provided.

By providing a reverberation signal of an object audio signal and an object audio signal corresponding to the object audio signal, an encoding / decoding apparatus capable of reconstructing a realistic sound scene according to the reverberation signal of the object audio signal.

An audio encoding apparatus according to an embodiment includes an audio signal encoder for encoding an audio signal; And a bitstream transmitter for converting the encoded audio signal into a bitstream and transmitting the bitstream. The audio signal may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.

An audio decoding apparatus according to an embodiment includes a bitstream receiver configured to receive a bitstream including an encoded audio signal; And an audio signal decoder which decodes an audio signal included in the bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream.

The audio decoding apparatus may further include an audio renderer that renders the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream.

An audio encoding method according to an embodiment includes encoding an audio signal; And converting the encoded audio signal into a bitstream and transmitting the bitstream, wherein the audio signal may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.

According to an embodiment, an audio decoding method includes: receiving a bitstream including an encoded audio signal; Decoding the audio signal included in the bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream; And rendering the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream.

In an audio encoding / decoding apparatus according to an embodiment, a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal may be used to reproduce a multichannel audio signal, thereby reproducing a more effective and realistic audio signal. .

The audio encoding / decoding apparatus according to an embodiment may reconstruct a realistic sound scene according to the reverberation signal of the object audio signal by rendering the reverberation signal of the object audio signal and the object audio signal corresponding to the object audio signal.

1 is a diagram illustrating an audio encoding / decoding apparatus according to an embodiment.

2 is a diagram illustrating an audio encoding apparatus, according to an embodiment.

3 is a diagram illustrating an audio decoding apparatus, according to an exemplary embodiment.

4 is a diagram illustrating an example of an audio encoding apparatus of FIG. 2, according to an embodiment.

5 is a diagram illustrating an example of an audio decoding apparatus of FIG. 3, according to an exemplary embodiment.

6 is a diagram illustrating a configuration of rendering information, according to an exemplary embodiment.

7 is a diagram illustrating an audio encoding method, according to an exemplary embodiment.

8 is a diagram illustrating an audio decoding method, according to an exemplary embodiment.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an audio encoding / decoding apparatus according to an embodiment.

Referring to FIG. 1, the audio encoding apparatus 101 may receive an audio signal including a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal. In this case, the audio encoding apparatus 101 may receive an audio signal by considering a reverberation signal of the object audio signal as an object including a channel audio signal and an object audio signal. In addition, the audio encoding apparatus 101 must receive an audio signal including the above-mentioned three types of audio signals.

The audio encoding apparatus 101 may receive rendering information. The rendering information is additional data and may include gain information-based rendering information and rendering information related to a time delay. In addition, the rendering information may include scene information corresponding to the audio signal when the audio signal is output.

The audio encoding apparatus 101 may encode the received audio signal. The audio encoding apparatus 101 may convert the rendering information into a bit string. For example, the audio encoding apparatus 101 may convert the rendering information into a bit string by performing binary conversion. In addition, the audio encoding apparatus 101 may simultaneously encode the audio signal and the rendering information. In this case, the audio encoding apparatus 101 may include a block capable of converting rendering information into a bit string.

The audio encoding apparatus 101 may convert the encoded audio signal into a bitstream. The audio encoding apparatus 101 may include a block capable of converting rendering information into a bit string. The audio encoding apparatus 101 may convert the rendering information and the encoded audio signal into a bitstream. The bitstream may include rendering information and an encoded audio signal. The audio encoding apparatus 101 may transmit the converted bitstream to the audio decoding apparatus 102.

The audio decoding apparatus 102 may receive the converted bitstream from the audio encoding apparatus 101. The audio decoding apparatus 102 may decode the audio signal included in the received bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream. The audio decoding apparatus 102 may render the extracted channel audio signal, the object audio signal, and the reverberation signal of the object audio signal based on the rendering information included in the bitstream. The audio decoding apparatus 102 may output the rendered multi-channel audio signal.

2 is a diagram illustrating an audio encoding apparatus, according to an embodiment.

Referring to FIG. 2, the audio encoding apparatus 201 may include an audio signal encoder 202 and a bitstream transmitter 203.

The audio signal encoder 202 may encode an audio signal. The audio signal may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal.

The channel audio signal may be a signal that is allocated to a channel of any playback device during reproduction as a channel audio signal that is generally used. Here, the channel audio signal may be a signal which is not changed by the rendering information. In addition, the channel audio signal may be arranged into a vector column for N channel audio signals by using Equation 1 below.

[Equation 1]

The object audio signal may be used as a subject that performs rendering by defining a specific audio signal among a plurality of audio signals as the object audio signal. Here, the object audio signal may be a signal that can be defined at any point through the geometric position analysis of the playback device. The object audio signal may be expressed as a matrix composed of vertor columns for M object audio signals using Equation 2 below.

In this case, Equation 2 may be used when independently rendering the positional information of the object audio signal and the delay information of the object audio signal.

가 스테레오로 구성되어 있다면, 수학식 3와 같이 표현할 수 있다.The object audio signal can be represented by a matrix because each object audio signal can be composed of multiple channel audio signals. In one example, the object audio signal is the first object audio signal

If is composed of a stereo, it can be expressed as Equation 3.

The reverberation signal of the object audio signal is a reverberation signal applied to the object audio signal and may express a sound field of the object audio signal. The reverberation signal of the object audio signal may correspond to the object audio signal and may include reverberation signals for the M object audio signals. The reverberation signal of the object audio signal may be expressed as shown in Equation 4.

In addition, the reverberation signal of the object audio signal may be composed of a plurality of channel audio signals in the same manner as the object audio signal. For example, the reverberation signal of the object audio signal may be expressed as shown in Equation 5 when configured as five channels of 5.1.

Here, the audio signal encoder 202 may encode an audio signal by including a reverberation signal having various layouts with respect to the object audio signal.

The bitstream transmitter 203 may convert the encoded audio signal into a bitstream. The bitstream transmitter 203 may generate the encoded audio signal and rendering information for outputting the audio signal into a bitstream. The rendering information may be additional data for the audio signal. In other words, the rendering information may be information that is applied to an audio signal to reproduce scene information related to sound. The rendering information may include at least one of position information of the audio object, sound pressure information of the audio object, and delay information of the audio object. The rendering information may be expressed as in Equation 6.

R (t) is position information of the object audio signal, and G _i (t) may be sound pressure of the object audio signal. D (t) may represent a delay of the object audio signal. G ₁ (t) and G ₂ (t) may be scale matrices for adjusting sound pressure on the received object audio signal. And t may be an index over time.

At this time, when rendering the positional information of the object audio signal and the delay information of the object audio signal at the same time, it can be expressed as Equation (7).

The bitstream transmitter 203 may transmit the converted bitstream to the audio decoding apparatus.

3 is a diagram illustrating an audio decoding apparatus according to an embodiment.

Referring to FIG. 3, the audio decoding apparatus 301 may include a bitstream receiver 302, an audio signal decoder 303, and an audio renderer 304.

The bitstream receiver 302 may receive a bitstream including an encoded audio signal from an audio encoding apparatus.

The audio signal decoder 303 may decode the audio signal included in the bitstream. In detail, the audio signal decoder 303 may extract the reverberation signal of the channel audio signal, the object audio signal, and the object audio signal from the bitstream. For example, the audio signal decoder 303 may be expressed as Equation 8, Equation 9, or Equation 10 corresponding to the extracted channel audio signal, the object audio signal, and the reverberation signal of the object audio signal.

The audio renderer 304 may render a reverberation signal of the extracted channel audio signal, the object audio signal, and the object audio signal based on the rendering information included in the bitstream. In addition, the audio renderer 304 may configure an acoustic scene based on scene information related to the sound of the rendering information.

In detail, the audio rendering unit 304 may express an operation principle of rendering an audio signal as shown in Equation 11 below.

Looking at the process of applying the first term in Equation 11, the sound pressure of the object audio signal may be adjusted. The process of adjusting the sound pressure of the object audio signal may be expressed by Equation 12.

는 음상 정위 행렬 P(t)에 의하여 실제적으로 출력되는 재생 장치의 스피커 위치에 할당될 수 있다. 그리고, 음상 정위 행렬 P(t)의 요소는 음압의 이득 값으로 표현될 수 있다. 여기서, 이득 값은 0에서 1사이의 실수 값을 포함할 수 있다. 그리고, 출력할 수 있는 채널의 수가 N인 경우,

는 수학식 13와 같은 음상 정위 행렬이 적용될 수 있다.Sound pressure

May be assigned to the speaker position of the reproduction device which is actually output by the image positioning matrix P (t). In addition, the elements of the negative positioning matrix P (t) may be expressed as gain values of sound pressure. Here, the gain value may include a real value between 0 and 1. If the number of channels that can be output is N,

A negative stereotactic matrix as shown in Equation 13 may be applied.

J개의 layout으로 구성되어 있는 경우, 수학식 14과 같이 표현될 수 있다.In Equation 13, the object audio signal is an object audio signal.

When composed of J layouts, it may be expressed as in Equation 14.

[Equation 14]

In addition, in the negative stereotactic matrix, the calculation process may be confirmed for each element of the negative stereographic matrix using Equation 15.

Therefore, the signal output by the negative stereotactic matrix P (t) can be expressed as in Equation (16).

In addition, in Equation 10, the second term may perform matrix operation having the same dimension. In addition, the matrix operation of the dimension may be expressed as in Equation 17.

[Equation 17]

J개의 layout으로 구성되어 있는 경우, 수학식 18과 같이 표현될 수 있다.Further, in Equation 17, the object audio signal is an object audio signal.

When composed of J layouts, it may be expressed as in Equation 18.

를 활용하여 표현할 수 있다. 그리고, 지연 연산 행렬 D(t)에 의해서 출력되는 신호는 수학식 19과 같이 표현할 수 있다.In this case, the delay operation process of the object audio signal can not be expressed by matrix multiplication, as is the operation of the application of the stereotactic matrix.

Can be expressed using. The signal output by the delay arithmetic matrix D (t) can be expressed by Equation 19.

The audio renderer 304 may apply the stereotactic matrix and the delay calculation matrix independently to the rendering process. The audio renderer 304 may express the PD (t) matrix by using Equation 20 when the audio stereotactic matrix and the delayed operation matrix are simultaneously applied.

The audio rendering unit 304 may extract a result as shown in Equation 21 through a calculation process as shown in Equation 20.

The audio renderer 304 may allocate a channel signal capable of outputting the object audio signal using the above-described equation. The audio renderer 304 may collect the allocated object audio signal with the decoded channel audio signal. The audio renderer 304 may generate an output signal that can be finally output.

In addition, the audio rendering unit 304 may render the reverberation signal of the object audio signal through a process such as Equation 22 or Equation 23.

The rendering process on the reverberation signal of the object audio signal using Equation 22 and Equation 23 may render the object audio signal and render a reverberation signal of the object audio signal corresponding to the object audio signal, thereby producing a more realistic sound scene. I can produce it.

를 렌더링하는 과정에서 제고하고자 할 때, 수학식 11의 이득 값에서

와 같이 값의 해를 할당할 수 있다. 그리고, 오디오 렌더링부(304)는 수학식 11의

와 동일하게 객체 오디오 신호의 잔향 신호를 객체 오디오 신호의 인덱스에 대응하여 제어할 수 있다. 또한, 오디오 렌더링부(304)는 수학식 22의 이득 값에서

와 같이 값의 해를 할당하거나, 수학식 23에서

와 같이 객체 오디오 신호를 제어할 수 있다.In addition, when controlling the object audio signal, the audio renderer 304 may control a reverberation signal of the object audio signal corresponding to the object audio signal. In one example, the audio rendering unit 304 is an object audio signal

In the process of rendering the equation, the gain value

You can assign a solution of values as And, the audio rendering unit 304 is

Similarly, the reverberation signal of the object audio signal may be controlled corresponding to the index of the object audio signal. In addition, the audio rendering unit 304 at the gain value of Equation 22

Assign a solution of the value, or

It can control the object audio signal as shown.

The output signal that can be finally output may be a signal in which the rendered object audio signal, the reverberation signal of the rendered object audio signal, and the decoded channel audio signal are integrated. The output signal may be expressed as in Equation (24).

와

로 구분할 수 있다. 다시 말해, 출력 신호는 렌더링 된 객체 오디오 신호의 정보와 렌더링 된 객체 오디오 신호의 잔향 신호의 정보를 서로 다른 방식을 통해 전송될 수 있다. 따라서, 수학식 23에서는 각각의 렌더링 정보로써

와

로 전송되어야 한다고 명시하고 있다.In equation (24)

Wow

Can be divided into In other words, the output signal may transmit information of the rendered object audio signal and information of the reverberation signal of the rendered object audio signal through different methods. Therefore, in Equation 23, as each rendering information

Wow

It should be sent to.

로 표기한 것은 최종적인 출력할 수 있는 채널의 수와 복호화 된 채널 오디오 신호가 다를 경우, 복호화 된 채널 오디오 신호

가 다운 믹스 된 형태의 신호로 표현했기 때문이다. 일례로, 복호화 된 채널 오디오 신호는 N개였으나,

와

에 의해 출력되는 출력 신호와 채널의 수를 K개로 한다면, 다운 믹스 행렬을 통해

도

로 변환할 수 있다. 다시 말해.

와

의 열 행렬의 차원 수도 K개가 될 수 있다.The channel audio signal decoded in Equation 23 is obtained.

Decoded channel audio signal indicates that the number of final output channels is different from the decoded channel audio signal.

Because it is expressed as a downmixed signal. In one example, there were N decoded channel audio signals,

Wow

If you set the number of output signals and channels to be K,

Degree

Can be converted to In other words.

Wow

The number of dimensions of the column matrix of may be K.

Here, the downmix matrix may be expressed as in Equation 25.

The downmix process when N channel audio signals and K output signals are decoded based on Equation 25 may be expressed as Equation 26.

와

의 열행렬의 차원수도 N인 경우, 출력 신호는 수학식 23에 수학식 24을 반영함으로써, 수학식 27과 같이 표현될 수 있다.At this time, the decoded channel audio signal

Wow

When the number of dimensions of the column matrix is also N, the output signal may be expressed by Equation 27 by reflecting Equation 24 in Equation 23.

In other words, the output signal may perform rendering on N channel audio signals and then perform downmixing by applying DMX (t). In addition, the time index t may change with time of the information of the DMX (t).

The audio encoding apparatus 101 and the audio decoding apparatus 102 can sufficiently reflect the original sound engineer's intention of creating content by using the reverberation signal of the object audio signal corresponding to the object audio signal. The audio encoding apparatus 101 and the audio decoding apparatus 102 may control the reverberation signal of the object audio signal. Accordingly, the audio encoding apparatus 101 and the audio decoding apparatus 102 may include rendering information corresponding to the reverberation signal of the object audio signal in order to further control the reverberation signal of the object audio signal.

4 is a diagram illustrating an example of an audio encoding apparatus of FIG. 2, according to an embodiment.

Referring to FIG. 4, the audio encoding apparatus may include an audio signal encoder 401 and a bitstream transmitter 402.

The audio signal encoder 401 may receive a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal. In this case, the audio signal encoder 401 may produce a higher sound scene by receiving a reverberation signal of the object audio signal. The audio signal encoder 401 may encode the received reverberation signal of the channel audio signal, the object audio signal, and the object audio signal into an audio signal.

The audio encoding apparatus may receive rendering information 403. The audio encoding apparatus may include a block capable of converting the rendering information 403 into binary.

In this case, when the audio signal encoder 401 includes a block capable of converting the rendering information 403, the audio signal encoder 401 may include a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal. It may be encoded into an audio signal including the rendering information 403.

The bitstream transmitter 402 may convert the encoded audio signal into a bitstream. The bitstream transmitter 402 may transmit the converted bitstream to the audio decoding apparatus. In this case, the bitstream may include a channel audio signal, an object audio signal, an audio signal including a reverberation signal of the object audio signal, and rendering information 403. The bitstream transmitter 402 may transmit a bitstream to generate multi-channel scene information. The multi-channel scene information may be generated based on the rendering information 403. The rendering information 403 may be used as additional data for the reverberation signal of the object audio signal.

5 is a diagram illustrating an example of an audio decoding apparatus of FIG. 3, according to an exemplary embodiment.

The audio decoding apparatus may include a bitstream receiver 501, an audio signal decoder 502, and an audio renderer 503.

The bitstream receiver 501 may receive a bitstream from an audio encoding apparatus. The received bitstream may include an audio signal and rendering information.

The audio signal decoder 502 may decode the audio signal. In other words, the audio signal decoder 502 may extract a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal included in the audio signal.

The audio rendering unit 503 may render the decoded channel audio signal, the object audio signal, and the reverberation signal of the object audio signal. The object audio signal may be rendered based on the rendering process of FIG. 3. The reverberation signal of the object audio signal may be rendered according to the index of the object audio signal when the object audio signal is rendered. The reverberation signal of the object audio signal may be controlled in the same manner as the object audio signal is controlled, thereby providing a more realistic sound image.

The audio rendering unit 503 may generate an output signal by rendering the decoded channel audio signal, the object audio signal, and the reverberation signal of the object audio signal. In this case, the output signal may include a rendered object audio signal, a reverberation signal of the rendered object audio signal, and a decoded channel audio signal. The output signal may be output to each channel as a multi-channel audio signal.

6 is a diagram illustrating a configuration of rendering information, according to an exemplary embodiment.

Referring to FIG. 6, the rendering information 600 may be represented in a matrix form. In this case, each matrix of the rendering information 600 may be represented by a substitute value to represent the rendering information. In one example, the location information of the object may be represented by the angle between the horizontal plane and the vertical plane. In addition, the matrix value and the gain value related to the delay information may be replaced with a value indicating a sense of distance. Also, the rendering information 600 may be applied to the rendered object audio signal and the reverberation signal of the rendered object audio signal corresponding to various types of rendering information 600 input to be used as additional data of the reverberation signal of the object audio signal. So that it can be converted into a matrix value and represented.

7 is a diagram illustrating an audio encoding method, according to an exemplary embodiment.

In operation 701, the audio encoding apparatus may receive a reverberation signal of a channel audio signal, an object audio signal, and an object audio signal. The channel audio signal may be a signal that is allocated to a channel of any playback device during reproduction as a channel audio signal that is generally used. The object audio signal may be used as a subject that performs rendering by defining a specific audio signal among a plurality of audio signals as the object audio signal. The reverberation signal of the object audio signal is a reverberation signal applied to the object audio signal, and may represent a sound field of the object audio signal.

The audio encoding apparatus may encode the audio signal including the reverberation signal of the channel audio signal, the object audio signal, and the object audio signal.

In operation 702, the audio encoding apparatus may convert the encoded audio signal into a bitstream. In this case, the bitstream may include a channel audio signal, an object audio signal, an audio signal including a reverberation signal of the object audio signal, and rendering information 403. The audio encoding apparatus may transmit a bitstream to generate multichannel scene information.

8 is a diagram illustrating an audio decoding method, according to an exemplary embodiment.

In operation 801, the audio decoding apparatus may receive a bitstream from the audio encoding apparatus. The received bitstream may include an audio signal and rendering information.

In operation 802, the audio decoding apparatus may decode the audio signal to extract a reverberation signal of the channel audio signal, the object audio signal, and the object audio signal included in the audio signal.

In operation 803, the audio decoding apparatus may render the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream. The audio decoding apparatus may render the reverberation signal of the object audio signal according to the index of the object audio signal when the object audio signal is rendered. The reverberation signal of the object audio signal may be controlled in the same manner as the object audio signal is controlled, thereby providing a more realistic sound image. The audio decoding apparatus may generate an output signal by rendering the decoded channel audio signal, the object audio signal, and the reverberation signal of the object audio signal.

Methods according to an embodiment of the present invention can be implemented in the form of program instructions that can be executed by various computer means and recorded in a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts.

As described above, the present invention has been described by way of limited embodiments and drawings, but the present invention is not limited to the above embodiments, and those skilled in the art to which the present invention pertains various modifications and variations from such descriptions. This is possible.

Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined not only by the claims below but also by the equivalents of the claims.

Claims (20)

An audio signal encoder for encoding an audio signal; And A bitstream transmitter for converting the encoded audio signal into a bitstream and transmitting the bitstream Including, The audio signal includes a channel audio signal, an object audio signal and a reverberation signal of the object audio signal. The method of claim 1, The reverberation signal of the object audio signal is And an audio encoding device for expressing a sound field of the object audio signal. The method of claim 1, The reverberation signal of the object audio signal is An audio encoding device comprising a plurality of channel signals. The method of claim 1, The reverberation signal of the object audio signal is And an audio encoding device providing various layouts for the object audio signal. The method of claim 1, The bitstream, And encoding information representing sound scene information of the audio signal. The method of claim 5, The bitstream transmission unit, The audio encoding apparatus for generating the encoded audio signal and the rendering information for reproduction of the audio signal in a bitstream. The method of claim 5, The rendering information, And at least one of position information of the audio object, sound pressure information of the audio object, and delay information of the audio object. A bitstream receiver configured to receive a bitstream including an encoded audio signal; And An audio signal decoder for extracting a channel audio signal, an object audio signal and a reverberation signal of the object audio signal from the bitstream by decoding the audio signal included in the bitstream. Audio signal decoding apparatus comprising a. The method of claim 8, The reverberation signal of the object audio signal is An audio decoding device for expressing the sound field of the object audio signal. The method of claim 8, The reverberation signal of the object audio signal is An audio decoding device comprising a plurality of channel signals. The method of claim 8, The reverberation signal of the object audio signal is And an audio decoding device providing various layouts for the object audio signal. The method of claim 8, The bitstream, And decoding information representing sound scene information of the audio signal. The method of claim 8, An audio renderer that renders the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream. Audio decoding device further comprising. The method of claim 13, The rendering information, And at least one of position information of the audio object, sound pressure information of the audio object, and delay information of the audio object. The method of claim 13, The audio rendering unit, And controlling the reverberation signal of the object audio signal corresponding to the object audio signal when the object audio signal is controlled. The method of claim 13, The audio rendering unit, And controlling the reverberation signal of the object audio signal in consideration of the index of the object audio signal corresponding to the reverberation signal of the object audio signal. Encoding an audio signal; And Converting the encoded audio signal into a bitstream and transmitting the bitstream Including, The audio signal includes a channel audio signal, an object audio signal and a reverberation signal of the object audio signal. The method of claim 17, The reverberation signal of the object audio signal is An audio encoding method comprising a plurality of channel signals, representing a sound field of the object audio signal, and providing various layouts for the object audio signal. Receiving a bitstream comprising an encoded audio signal; Decoding the audio signal included in the bitstream to extract a channel audio signal, an object audio signal, and a reverberation signal of the object audio signal from the bitstream; And Rendering the extracted channel audio signal, the object audio signal, and a reverberation signal of the object audio signal based on the rendering information included in the bitstream Audio signal decoding method comprising a. The method of claim 19, The reverberation signal of the object audio signal is An audio encoding method comprising a plurality of channel signals, representing a sound field of the object audio signal, and providing various layouts for the object audio signal.

Images