KR20150111119A - System and method for reproducing audio signal - Google Patents

Abstract

According to the present invention, an audio signal processing device includes: inner and outer renderers which render encoded channel signals or encoded object signals; a distributing unit which distributes the encoded channel signals or object signals to the inner and outer renderers; and playback units which play the channel signals or object signals respectively rendered by the inner and outer renderers. The channel signals or object signals respectively rendered through the inner and outer renderers are played by different playback units respectively.

Description

Technical Field [0001] The present invention relates to an audio signal reproducing apparatus,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an audio signal reproducing apparatus and method, and more particularly, to an audio signal reproducing apparatus and method for rendering an input audio bit stream signal using an internal renderer and an external renderer, respectively.

3D audio is a series of signal processing, transmission, encoding, and playback to provide a sound in three-dimensional space by providing another axis corresponding to the height direction in a horizontal sound scene (2D) provided by conventional surround audio. Technology and so on. In particular, in order to provide 3D audio, there is a demand for a rendering technique that allows a sound image to be formed at a virtual position in which a speaker is not present even if a larger number of speakers are used or a smaller number of speakers are used.

3D audio is expected to be an audio solution for future high definition TVs (UHDTVs), including sound from vehicles evolving into high-quality infotainment space, as well as theater sounds, personal 3DTV, tablets, smartphones and cloud games It is expected to be applied in various fields such as.

On the other hand, depending on the specificity of the channel in 3D audio reproduction and the speaker environment in the reproduction stage, there may exist exception channels that are difficult to reproduce by the existing reproduction method. Objects may also be difficult to reproduce if they are located outside of the speaker environment at the playback end. Accordingly, there is a need for a technique for effectively reproducing an exception channel based on the speaker environment at the playback end, and a sound bar is used as an example of this.

Although the sound bar is advantageous for exception channel reproduction, it has disadvantages such as deterioration in sound quality when the basic channel signal is reproduced. Accordingly, it may be preferable to use an audio reproducing apparatus having a structure in which a separate speaker reproducing apparatus such as a sound bar and a basic speaker apparatus are combined. Therefore, an MPEG-H decoding method suitable for such a use environment is required.

Korean Patent Publication No. 2011-0002504 (entitled Improved Coding and Parameter Representation of Multichannel Downmixed Object Coding) discloses a method in which a plurality of audio objects are distributed to at least two downmix channels and downmix information And generating object parameters to generate an encoded audio object signal.

SUMMARY OF THE INVENTION The present invention is directed to overcoming the drawbacks of the prior art described above, in which some embodiments of the present invention render each input audio bitstream signal in an internal renderer and an external renderer, respectively, And to provide an audio signal reproducing apparatus and method which can reproduce audio signals simultaneously through a speaker device of a digital still camera.

According to an aspect of the present invention, there is provided an audio signal reproducing apparatus comprising: an internal renderer and an external renderer for rendering a decoded channel signal or a decoded object signal; A distribution unit for distributing a signal to the inner renderer and the outer renderer, and a playback unit for playing back the channel signal or the object signal rendered by the inner renderer and the outer renderer, The channel signal or the object signal is reproduced through a separate reproducing unit.

According to a second aspect of the present invention, there is provided an audio signal reproducing method for distributing one or more channel signals or object signals among a decoded channel signal or a decoded object signal to an inner renderer and an outer renderer, Rendering the channel signal or the object signal distributed to the inner renderer and the outer renderer, respectively, and reproducing the rendered channel signal or object signal, wherein the distributing comprises: Distributes the decoded channel signal or the object signal to the external renderer when the channel is out of the usable speaker area.

According to an embodiment of the present invention, if an exception channel or an exception object is present, it can be rendered through an external renderer, and simultaneously reproduced with a signal rendered through an internal renderer. Thus, It is possible to solve the problem in the reproduction occurring in the case of FIG.

In addition, when there are separate reproduction devices requiring different renderers, the reproduction quality of the audio signal can be improved by receiving, rendering, and receiving channel signals or object signals corresponding to the respective reproduction devices, respectively.

1 is a view for explaining viewing angles according to image sizes at the same viewing distance.
2 is a configuration diagram of a 22.2-channel speaker as an example of a multi-channel audio environment.
3 is a conceptual diagram showing the positions of sound objects constituting a three-dimensional sound scene on the listening space.
4 is a diagram showing an overall structure of a 3D audio decoder and a renderer including a channel or object renderer.
FIG. 5 is a diagram in which 5.1 channels are arranged at positions and arbitrary positions according to ITU-R Recommendations.
6 is a diagram showing a connected structure in which an object signal decoder and a flexible speaker rendering unit are combined.
7 is a block diagram of an audio signal reproducing apparatus according to an embodiment of the present invention.
8 is a flowchart of an audio signal reproducing method according to an embodiment of the present invention.
9 is a diagram illustrating an example of an apparatus for implementing an audio signal reproducing 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, which will be readily apparent to those skilled in the art. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification, when a part is referred to as being "connected" to another part, it includes not only "directly connected" but also "electrically connected" with another part in between . Also, when an element is referred to as "comprising ", it means that it can include other elements as well, without departing from the other elements unless specifically stated otherwise. The word " step (or step) "or" step "used to the extent that it is used throughout the specification does not mean" step for.

First, an environment for implementing an audio signal processing system and an audio signal processing method according to the present invention will be described with reference to FIGS. 1 to 6. FIG.

1 is a view for explaining viewing angles according to image sizes (e.g., UHDTV and HDTV) at the same viewing distance.

Display technology has been developed, and the size of the image is becoming larger according to the demand of the consumer. As shown in FIG. 1, UHDTV (7680 * 4320 pixel image, 110) is an image about 16 times larger than HDTV (1920 * 1080 pixel image, 120). If the HDTV 120 is installed on the living room wall and the viewer sits on the living room sofa with a certain viewing distance, the viewing angle may be about 30 degrees. When the UHDTV 110 is installed at the same viewing distance, the viewing angle reaches about 100 degrees.

When such a high-resolution and high-resolution large screen is installed, it is desirable to provide a sound having a high sense of presence and a sense of worth as appropriate for large-sized contents. It may not be enough for a viewer to have 1-2 surround channel speakers to provide an environment that is almost identical to that in the scene. Therefore, a multi-channel audio environment having a larger number of speakers and channels is required.

As described above, in addition to a home theater environment, there are personal 3DTV, smartphone TV, 22.2 channel audio program, automobile, 3D video, remote sense room, and cloud-based game.

2 is a configuration diagram of a 22.2-channel speaker as an example of a multi-channel audio environment.

The 22.2 channel may be an example of a multi-channel audio environment for enhancing the sound field, and the present invention is not limited to a specific number of channels or a specific speaker arrangement. Referring to FIG. 2, a total of nine channels may be arranged in a top layer 210. There are three speakers on the front, three on the middle, and three on the surround. In the middle layer 220, five speakers are arranged in front, two speakers in the middle position, and three speakers in the surround position. A total of ten speakers are arranged. In the bottom layer 230, three channels are arranged on the front side, and two LFE channels 240 are provided.

As described above, a high calculation amount is required to transmit and reproduce multi-channel signals up to several tens of channels. In addition, a high compression ratio may be required in consideration of a communication environment and the like. In addition, in a typical home, it is very rare to have a multi-channel speaker environment such as 22.2 channel, and many listeners have a 2-channel or 5.1-channel setup. Therefore, a signal transmitted in common to all users is transmitted as a multi- In the case of a signal, the multi-channel signal must be converted again to correspond to two channels or 5.1 channels and reproduced. Accordingly, not only communication inefficiency occurs but also a PCM signal of 22.2 channels must be stored, which may cause an inefficient problem in memory management.

3 is a conceptual diagram showing the positions of sound objects constituting a three-dimensional sound scene on the listening space.

The position of each sound object 310 constituting a three-dimensional sound scene in the listening space 300 in which the listener 320 listens to 3D audio is a point source 310 shape as shown in FIG. As shown in FIG.

3, each object is represented as a point source 310. However, in addition to the point source 310, a sound source in the form of a plain wave, or a sound source in a full direction capable of recognizing the space of a sound scene And an ambient sound source, which is a spreading noise.

4 is a diagram showing an overall structure of a 3D audio decoder and a renderer including a channel or object renderer.

The decoder system shown in FIG. 4 can be broadly divided into a 3D audio decoder unit 400 and a 3D audio rendering unit 450.

The 3D audio decoder unit 400 may include an individual object decoder 410, an individual channel decoder 420, a SAOC transducer 430 and an MPS decoder 440.

The individual object decoder 410 receives the object signal, and the individual channel decoder 420 receives the channel signal. At this time, the audio bit stream may include only the object signal or only the channel signal, and may include both the object signal and the channel signal.

In addition, the 3D audio decoder 400 may receive the waveform-encoded or parametric-encoded signals of the object signal or the channel signal through the SAOC transducer 430 and the MPS decoder 440, respectively.

The 3D audio rendering unit 450 includes a 3DA renderer 460 and can render a channel signal, an object signal, or a parametric encoded signal through the 3DA renderer 460, respectively.

The 3D audio decoder 400 receives the object signal, the channel signal, or the combined signal output from the 3D audio decoder 400 and outputs a sound according to the environment of the speaker in the listening space. At this time, the weights of the 3D audio decoder unit 400 and the 3D audio rendering unit 450 can be set based on the number and location information of the speakers in the listening space in which the listener is present.

On the other hand, one of the technologies required for 3D audio is flexible rendering, and flexible rendering technology is one of the important challenges to be solved to maximize the quality of 3D audio. The reason for the flexible rendering technique is as follows.

It is well known that the position of the 5.1 channel speaker is very irregular depending on the structure of the living room and the arrangement of the furniture. Even if there is a speaker at such an irregular position, a content producer should be able to provide a sound scene intended by the content creator. To do this, it is necessary to know the speaker environment in different reproduction environments for each user, and at the same time, there is a need for a rendering technique for correcting the difference in position according to the standard. That is, a series of techniques are required to decode the transmitted bit stream according to the decoding method, and not to end the codec role, but to optimize and transform it according to the user's reproduction environment.

FIG. 5 is a diagram in which 5.1 channels are arranged at positions and arbitrary positions according to ITU-R Recommendations.

The speaker 520 disposed in the actual living room environment has a problem that the direction angle and the distance are different from each other with respect to the ITU-R recommendation 510. [ That is, since the height and direction of the speaker are different from those of the speaker 510 according to the recommendation, it is difficult to provide an ideal 3D sound scene when the original signal is directly reproduced at the position of the changed speaker 520.

In such a situation, amplitude panning, which determines the direction information of the sound source between two speakers based on the signal size, and VBAP (which is widely used for determining the direction of the sound source using three speakers in a three- Vector-Based Amplitude Panning), it is possible to implement flexible rendering for object signals transmitted by objects relatively easily. Therefore, it is possible to transmit the object signal instead of the channel signal, thereby easily providing a 3D sound scene even in an environment where the speaker is changed.

6 is a diagram showing a connected structure in which an object signal decoder and a flexible speaker rendering unit are combined.

As described with reference to FIG. 5, when the object signal is used, the object can be positioned as a sound source in accordance with a desired sound scene. The first embodiment 600 and the second embodiment 601 in which the object signal decoder and the flexible rendering unit that reflect such advantages are combined will be described.

The object signal decoder and the flexible speaker rendering unit are combined in the first embodiment 600. The mixer unit 620 receives the object signal from the object decoder unit 610 and receives the position information represented by the mixing matrix, . That is, the position information of the sound scene is expressed by relative information from the speaker corresponding to the output channel.

The output channel signal is flexibly rendered through the flexible speaker rendering unit 630 and output. At this time, if the number and position of the actual speakers are not present at the predetermined position, the position information of the speaker may be input and the flexible rendering may be performed.

In contrast, in the second embodiment 601, when the object decoder unit 640 receives the audio bitstream signal and decodes the object signal, the flexible speaker mixer 650 receives the audio bitstream signal and performs flexible rendering. At this time, the matrix updating unit 660 transmits the matrix reflecting the mixing matrix and the position information of the speaker to the flexible speaker mixer 650, thereby reflecting the matrix when performing the flexible rendering.

Rendering the channel signal into another channel signal as in the first embodiment 600 is more difficult to implement than when the object is directly rendered in the final channel as in the second embodiment 601. [ This will be explained in detail below.

When a channel signal is transmitted as an input, if the position of the speaker corresponding to the channel is changed to an arbitrary position, it is difficult to implement the object using the same panning technique, so a separate channel mapping process is required. In addition, since object signals and channel signals have different processes and solutions for rendering, when object signals and channel signals are transmitted at the same time to produce a sound scene in which both signals are mixed, distortions due to mismatching of space A problem that is likely to occur occurs.

In order to solve such a problem, a flexible rendering of a channel signal is performed after a mix is first performed on a channel signal without separately performing flexible rendering of an object. At this time, rendering using a head related transfer function (HRTF) is preferably implemented in the same manner as described above.

Hereinafter, an audio signal reproducing apparatus and method according to the present invention will be described in detail with reference to FIG. 7 to FIG.

7 is a block diagram of an audio signal reproducing apparatus 700 according to an embodiment of the present invention.

The audio signal playback apparatus 700 according to the present invention includes an audio internal renderer 730, an external renderer 740, a distribution unit 750, and a playback unit 760.

First, the audio signal reproducing apparatus 700 according to the present invention may further include an audio signal receiving unit 710 and a decoding unit 720. The audio signal receiving unit 710 may receive an audio bit stream including one or more channel signals or object signals and the decoding unit 720 may decode a channel signal or an object signal included in the audio bit stream. At this time, the decoding unit 720 can decode the metadata of a plurality of object signals.

The internal renderer 730 renders the decoded channel signal or object signal, and the external renderer 740 also renders the decoded channel signal or object signal. At this time, the inner renderer 730 and the outer renderer 740 may render a channel signal or an object signal based on Vector Based Amplitude Panning (VBAP) rendering.

The inner renderer 730 may be a 3DA renderer 460 as shown in FIG. 4 as a renderer corresponding to a standard renderer for MPEG-H and the outer renderer 740 may be a renderer included in a particular product, It can be a renderer. The speaker environment to which the internal renderer 730 and the external renderer 740 are applied will be described as follows.

The speaker environment of the audio signal reproducing apparatus 700 according to the present invention may be configured such that when a separate reproduction system such as a general loudspeaker and a sound bar is provided, The sound source to be reproduced through the sound bar can be rendered through the external renderer 740. [

The external renderer 740 may also be a binaural renderer so that the signal rendered in the internal renderer 730 is played on a normal loudspeaker and the binaural rendered signal on the external renderer 740 is played on a headphone And may be reproduced through the same speaker environment.

Meanwhile, in the audio signal reproducing apparatus 700 according to the present invention, the speaker environment to which the internal renderer 730 and the external renderer 740 are applied is not limited to this, and various rendering methods and speaker environments may be applied.

Thus, signals processed independently by two renderers can be played simultaneously in the same space. In this case, in order for the rendered signals to be simultaneously reproduced in the same space, synchronization between the internal renderer 730 and the external renderer 740 is required. This is achieved through the delay compensating unit 770 and the weight adjusting unit 780 Can be synchronized.

The distribution unit 750 distributes the decoded channel signal or object signal to the inner renderer 730 and the outer renderer 740. At this time, the distribution unit 750 distributes one or more channel signals or object signals of the decoded channel signal or object signal to the inner renderer 730 and the outer renderer 740.

The distribution unit 750 may distribute one or more channel signals or object signals of the decoded channel signal or object signal to the inner renderer 730 and the outer renderer 740. For example, when receiving the first to fifth channel signals, the distribution unit 750 distributes the first to third channel signals to the internal renderer 730, and outputs the third to fifth channel signals to the external renderer 740 so that the third channel signals may be distributed to the inner renderer 730 and the outer renderer 740 so as to overlap with each other. In this case, when the overlapping case is the maximum, the inner renderer 730 and the outer renderer 740 receive the same channel signal or object signal. That is, the distribution unit 750 may distribute the first through fifth channel signals so that the first through fifth channel signals are commonly input to the internal renderer 730 and the external renderer 740.

Alternatively, the distribution unit 750 may distribute the decoded channel signal or object signal to the internal renderer 730 and the external renderer 740 so that they do not overlap. For example, the first to third channel signals may be distributed to the inner renderer 730, and the fourth to fifth channel signals may be distributed to the outer renderer 740.

The playback unit 760 plays back the channel signals or object signals rendered by the internal renderer 730 and the external renderer 740, respectively. At this time, the channel signal or the object signal rendered through the inner renderer 730 or the outer renderer 740 is reproduced through the separate reproducing unit 760.

Meanwhile, the audio signal reproducing apparatus 700 according to the present invention may further include a delay compensating unit 770, a weight adjusting unit 780, and a speaker information inputting unit 790.

The delay compensator 770 can compensate for the time delay occurring between the inner renderer 730 and the outer renderer 740. [ For example, if the external renderer 740 generates an additional time delay than the internal renderer 730, the delay compensator 770 takes the delay time 740 into consideration so that the internal renderer 730 and the external renderer 740 are synchronized with each other, Can be performed.

The weight adjusting unit 780 may adjust the output weights of the internal renderer 730 and the external renderer 740 to adjust the intensity of the channel signal or the object signal. That is, since the channel signals or object signals respectively rendered through the inner renderer 730 and the outer renderer 740 are reproduced in the same space, the weight adjuster 780 adjusts the weight of the sound of the inner renderer 730 and the outer renderer 740 The intensity of the signal can be adjusted and synchronized.

The speaker information input unit 790 can receive user's available speaker information. At this time, when the position of the channel or object corresponding to the channel signal or the object signal is out of the usable speaker area based on the usable speaker information of the inputted user, the distribution unit 750 outputs the decoded channel signal or the object signal To the external renderer 740 so that the external renderer 740 can render the channel signal or object signal off the usable speaker area.

8 is a flowchart of an audio signal reproducing method according to an embodiment of the present invention.

The audio signal reproducing method in the audio signal reproducing apparatus 700 according to the present invention can receive user's available speaker information. At this time, the usable speaker environment of the user may be, for example, a general loudspeaker and sound bar, or a headphone receiving a rendered signal through binaural rendering instead of a sound bar. When the user inputs usable speaker information through the UI or the like, it is determined whether or not the position of the channel or object corresponding to the channel signal or the object signal deviates from the usable speaker area based on the speaker information. As a result of determination, when the speaker area is out of the range, a channel signal or an object signal is rendered through the external renderer 740 as described below, and the rendered signal can be reproduced through a playback device such as a sound bar or a headphone.

Meanwhile, the speaker environment to which the audio signal reproducing method according to the present invention is applied is not limited to the above-described application example, and the audio signal reproducing method according to the present invention can be applied to various speaker environments.

In addition, the audio signal reproducing method according to the present invention receives an audio bit stream including one or more channel signals or object signals, and decodes a channel signal or an object signal included in the received audio bit stream (S830). At this time, the metadata for the object signal may be decoded and the decoded metadata may be distributed to the internal renderer 730 or the external renderer 740 based on the decoded metadata.

After decoding the channel signal or the object signal, one or more channel signals or object signals of the decoded channel signal or object signal are distributed to the inner renderer 730 and the outer renderer 740, respectively (S810). At this time, when the decoded channel signal or the object signal is out of the usable speaker area, the decoded channel signal or object signal is distributed to the external renderer 740.

The distribution unit 750 may distribute the channel signal or the object signal included in the audio bit stream to the internal renderer 730 and the external renderer 740 so that the channel signal or the object signal is distributed You may. The description thereof has been given with reference to FIG. 7, so that a detailed description thereof will be omitted.

Next, the channel signal or the object signal distributed to the internal renderer 730 and the external renderer 740 are respectively rendered (S820). At this time, the inner renderer 730 and the outer renderer 740 may render a channel signal or an object signal based on the VBAP rendering. Meanwhile, the inner renderer 730 may be a 3DA renderer 460 shown in FIG. 4 as a renderer corresponding to a standard renderer for MPEG-H, and the outer renderer 740 may be a renderer included in a particular product, It can be a developed renderer.

Next, the rendered channel signal or object signal is reproduced (S830). At this time, the channel signal or the object signal rendered through the inner renderer 730 and the outer renderer 740 can be reproduced through the separate reproducing unit 760, respectively. That is, the internal renderer 730 can be played through a normal loudspeaker, and the external renderer 740 can be played through a separate playback unit 760 such as a sound bar or a headphone. As described above, signals processed independently by the inner renderer 730 and the outer renderer 740 can be simultaneously reproduced in the same space. It is necessary to synchronize the internal renderer 730 and the external renderer 740 in order to reproduce simultaneously in the same space.

Accordingly, the audio signal playback method according to the present invention may further include a step of synchronizing the internal renderer 730 and the external renderer 740.

Specifically, it may further include compensating for a delay time occurring between the internal renderer 730 and the external renderer 740. For example, if external renderer 740 causes an additional time delay than internal renderer 730, consideration may be given to compensating for the time delay of internal renderer 730 so that both renderers are synchronized.

The method may further include adjusting sound strength of the channel signal or the object signal by adjusting output weights of the external renderer 740 and the internal renderer 730, respectively. The output weights of the inner renderer 730 and the outer renderer 740 to adjust the intensity of the sound of the speaker that reproduces the signal rendered in the inner renderer 730 and the sound of the speaker that reproduces the signal rendered in the outer renderer 740 It is possible to solve the problem that sound is distorted when reproduced in the same space.

9 is a diagram illustrating an example of an apparatus for implementing an audio signal reproducing method according to an embodiment of the present invention.

The audio signal reproducing method according to the present invention can be implemented by the audio reproducing apparatus 1 shown in Fig.

The audio reproducing apparatus 1 may include a wire / wireless communication unit 10, a user authentication unit 20, an input unit 30, a signal coding unit 40, a control unit 50, and an output unit 60.

The wired / wireless communication unit 10 receives an audio bit stream through a wired / wireless communication scheme. The wired / wireless communication unit 10 may include a configuration such as an infrared communication unit, a Bluetooth unit, and a wireless LAN communication unit, and may receive an audio bit stream through various other communication methods.

The user authentication unit 20 receives user information and performs user authentication. At this time, the user authentication unit 20 may include at least one of a fingerprint recognition unit, an iris recognition unit, a face recognition unit, and a voice recognition unit. That is, the user authentication can be performed by receiving the fingerprint, iris information, face contour information, and voice information, converting the received information into user information, and determining whether the user information matches with the previously registered user information.

The input unit 30 may include at least one of a keypad unit, a touch pad unit, and a remote control unit, for inputting various kinds of commands by a user.

The signal coding unit 40 may encode or decode an audio signal, a video signal, or a combined signal received through the wire / wireless communication unit 10 and output an audio signal in the time domain. The signal coding unit 40 may include an audio signal processing apparatus, and the audio signal processing apparatus may be applied to the audio signal processing method according to the present invention.

The control unit 50 receives an input signal from the input devices and controls all the processes of the signal coding unit 40 and the output unit 60. [ The output unit 60 outputs the output signal or the like generated by the signal coding unit 40 and may include components such as a speaker unit and a display unit. At this time, if the output signal is an audio signal, the output signal is outputted to the speaker, and if it is a video signal, it can be outputted through the display.

4, 6, 7, and 9 according to an embodiment of the present invention may include hardware components such as software or a field programmable gate array (FPGA) or an application specific integrated circuit (ASIC) And performs certain roles.

However, 'components' are not meant to be limited to software or hardware, and each component may be configured to reside on an addressable storage medium and configured to play one or more processors.

Thus, by way of example, an element may comprise components such as software components, object-oriented software components, class components and task components, processes, functions, attributes, procedures, Routines, segments of program code, drivers, firmware, microcode, circuitry, data, databases, data structures, tables, arrays, and variables.

The components and functions provided within those components may be combined into a smaller number of components or further separated into additional components.

On the other hand, an embodiment of the present invention may also be realized in the form of a recording medium including instructions executable by a computer such as a program module executed by a computer. Computer readable media can be any available media that can be accessed by a computer and includes both volatile and nonvolatile media, removable and non-removable media. In addition, the computer-readable medium may include both computer storage media and communication media. Computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Communication media typically includes any information delivery media, including computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave, or other transport mechanism.

It will be understood by those skilled in the art that the foregoing description of the present invention is for illustrative purposes only and that those of ordinary skill in the art can readily understand that various changes and modifications may be made without departing from the spirit or essential characteristics of the present invention. will be. It is therefore to be understood that the above-described embodiments are illustrative in all aspects and not restrictive. For example, each component described as a single entity may be distributed and implemented, and components described as being distributed may also be implemented in a combined form.

The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

1: audio reproducing apparatus 10: wired / wireless communication unit
20: user authentication unit 30: input unit
40: signal coding unit 50:
60: Output unit 110: UHDTV
120: HDTV 300: listening space
310: Point source 320: Celadon
400: 3DA decoder unit 410: Individual object decoder
420: Individual channel decoder 430: SAOC transcoder
440: MPS decoder 450: 3DA rendering unit
460: 3DA renderer 700: Audio signal reproduction device
710: Audio signal receiving unit 720: Decoding unit
730: Internal renderer 740: External renderer
750: distribution portion 760: reproducing portion
770: delay compensating unit 780: weight adjusting unit
790: speaker information input section

Claims (12)

An audio signal reproducing apparatus comprising:
An inner renderer and an outer renderer that render the decoded channel signal or the decoded object signal,
A distributor for distributing the decoded channel signal or the object signal to the inner renderer and the outer renderer,
And a playback unit for playing back the channel signal or the object signal rendered in the internal renderer and the external renderer,
Wherein the channel signal or the object signal rendered through the internal renderer or the external renderer is played through a separate playback unit. The method according to claim 1,
And a delay compensation unit for compensating for a time delay occurring between the internal renderer and the external renderer. The method according to claim 1,
And a weight adjuster for adjusting the sound intensity of the channel signal or the object signal by adjusting output weights of the external renderer and the internal renderer, respectively. The method according to claim 1,
Wherein the distributing unit distributes one or more channel signals or object signals of the decoded channel signal or the object signal to the internal renderer and the external renderer. The method according to claim 1,
Wherein the distributing unit distributes the decoded channel signal or the object signal without overlapping with the internal renderer and the external renderer. The method according to claim 1,
And a speaker information input unit for receiving user's available speaker information,
Wherein the distributing unit distributes the decoded channel signal or the object signal to the external renderer when the decoded channel signal or the object signal is out of the usable speaker area. The method according to claim 1,
Wherein the decoding unit decodes the metadata for the object signal. The method according to claim 1,
Wherein the internal renderer and the external renderer render the channel signal or object signal based on VBAP rendering. A method for reproducing an audio signal in an audio signal reproducing apparatus,
Distributing one or more channel signals or object signals of a decoded channel signal or a decoded object signal to an inner renderer and an outer renderer, respectively,
Rendering a distributed channel signal or an object signal to the internal renderer and the external renderer, respectively, and
And reproducing the rendered channel signal or the object signal,
Wherein the distributing comprises:
And distributes the decoded channel signal or the object signal to the external renderer when the decoded channel signal or object signal is out of the usable speaker area. 10. The method of claim 9,
And compensating for a time delay occurring between the internal renderer and the external renderer. 10. The method of claim 9,
And adjusting the sound weights of the channel signal or the object signal by adjusting output weights of the external renderer and the internal renderer, respectively. 10. The method of claim 9,
And receiving the user's available speaker information.

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