KR100678929B1 - Method For Playing Multi-Channel Digital Sound, And Apparatus For The Same - Google Patents

Abstract

The present invention relates to a multichannel digital sound reproduction method and apparatus.

The multi-channel digital sound reproducing apparatus stores a sound signal generating unit for generating a multi-channel sound signal, and a channel correction matrix set by the user's position information, and corrects the multi-channel sound signal by using the stored matrix. It includes a channel correction unit for transmitting to a plurality of speakers.

In the multi-channel digital sound reproduction method, a signal generation step of generating a multi-channel sound signal and a channel correction matrix set according to user location information are set, and the multi-channel sound signal is corrected by using the set matrix. Channel correction step for delivering to the speaker.

According to the present invention, it is possible to listen to multi-channel music properly corrected at the user's position.

Multi channel, 5.1 channel, channel correction, user location information

Description

Method for playing multi-channel digital sound and device {Method For Playing Multi-Channel Digital Sound, And Apparatus For The Same}

FIG. 1A illustrates a speaker connection terminal of a 5.1 channel home theater system.

FIG. 1B is a diagram illustrating a 5.1 channel home theater system disposed.

2 is a functional block diagram of a multi-channel digital sound reproduction apparatus according to an embodiment of the present invention.

3 is a diagram illustrating a channel correction process according to a change in user location according to an embodiment of the present invention.

4 is a diagram illustrating a channel correction process according to a change in user location according to another exemplary embodiment of the present invention.

5A, 5B, 5C, and 5D are diagrams showing channels corrected according to user location input on ODS (On Screen Diplay), respectively.

The present invention relates to a multi-channel digital sound reproduction method and apparatus, and more particularly, to a multi-channel digital sound reproduction method and apparatus according to the user's position.

Recently, home theaters are becoming popular. A home theater literally means a movie theater that is decorated at home. It is also called a home theater. Home theater was used before DVD (Digatal Versatile Disk) was introduced, but generalized as DVD system became popular. The DVD system is excellent, providing users with picture quality and realistic sound. In particular, DVD has an advantage of providing a very realistic sound compared to conventional methods such as LD (Lager Disk), VHS (Video Home System) or VCD (Video Compact Disk). For example, in the case of "Private Ryan," the sound from the real speaker is heard from the back to the front when the bullet flies backwards. In the Matrix, the sound transmitted through the speakers as the helicopter rolls over the head of the protagonist feels as if the helicopter is actually spinning around the head. It is multichannel digital sound that enables such stereoscopic sound. The multichannel digital sound currently used mainly is a digital channel sound known as a 5.1 channel digital sound or a six channel digital sound.

The 5.1 channel is 5.1 channels, including two left and right front channels in front of the user, two left and right rear channels in the rear of the user, five channels of the center channel in the center, and a subwoofer 0.1 channel that reinforces bass. Speakers in the front channel are also called main speakers as speakers located in front of the listener. The role of the main speaker is mainly responsible for the background music and the effect sound connected from the front to the left and right. In fact, the main speaker is used larger than the other speakers, which are used for the sake of stereo channel reproduction, and need not necessarily be larger than the other speakers. The center channel speaker is called the center speaker and is mainly responsible for the dialogue part of the film or the human voice, or vocal, in music. Of course, some music or sound effects are also included and delivered to the user. Center speakers are usually placed on televisions, so that they sound like the actor is talking right on the screen. The rear channel speakers are called rear speakers or surround speakers and are installed on the sides of the user. The rear speakers are mainly responsible for the surround effect. In the past, surround was mono, but stereo surround was used on the 5.1 channel. On the other hand, the subwoofer is a low frequency (Low Frequency) speaker, unlike other speakers are not significantly limited in position. The reason for this is that bass sounds are less directive than mid and high notes. Most subwoofers can play up to 20 to 30Hz, while a superior subwoofer can play down to lower sounds. This bass gives you a more realistic sound reproduction as well as sound. On the other hand, the subwoofer may or may not have its own amplifier. Recently, an active type that has its own amplifier to obtain its own volume control and powerful sound is widely used. Meanwhile, among the speakers, except for the subwoofer, the speakers may have different positions depending on their roles, but may not be physically different. In the case of the center speaker, there are only a few differences for the metabolism of the film.

Multi-channel digital sound reproduction system has various channels such as 4 channels and 4.1 channels as well as 5.1 channels. Recently, home theaters with 6.1 channels have been introduced. When installing a home theater with multi-channel digital sound reproduction, each speaker must be connected to its own terminal.

FIG. 1A shows a speaker connection terminal of a 5.1 channel home theater system, and FIG. 1B shows a speaker layout for a home theater.

Each speaker has its own terminal to be connected to the playback device. That is, the front left speaker should be connected to the front left speaker terminal and the center speaker should be connected to the center speaker terminal. Once the speakers are properly plugged in, they should be installed in their place. The front left speaker is placed on the front left side of the home theater system, the front light speaker is placed on the front right side of the home theater system, the rear left speaker is placed behind the user's left side, and the rear light speaker is placed behind the user's right side. The center speaker is placed above or below the display in front of the front. The woofer has less directivity, so it can be installed in a convenient place. When the speaker is placed properly, users can enjoy 5.1 channel stereo sound.

However, if the user wants to watch the movie by moving the display for some reason, the user does not need to move the display, but the speaker also has to move one by one. The characteristics of the speakers are similar except for the subwoofer, so if you do not want to move the speakers, you should change at least the terminals to which they are connected.

If you watch the movie by changing the direction without changing the speaker connection terminal, there is an unnaturalness that does not match the direction and sound of the sound. On the other hand, even when simply trying to listen to music, when using such a conventional device, there is an inconvenience of sitting and listening only to the direction in which the home theater is installed. Therefore, there is a need for a multi-channel digital sound reproducing method or a reproducing apparatus irrespective of the user's direction for the reasons described above.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-described necessity, and a technical object of the present invention is to provide a multi-channel digital sound reproduction method and apparatus therefor that can correct a speaker channel according to a direction set by a user.

In order to achieve the above object, the multi-channel digital sound reproduction apparatus according to the present invention is a sound signal generator for generating a multi-channel sound signal from the multi-channel sound source data, and a channel correction set by the control signal according to the user's position information And a channel correction unit configured to store a matrix and correct the multi-channel sound signal using the stored matrix and transmit the multi-channel sound signal to a plurality of speakers.

The location information of the user is information input by the user through the user interface, and the location information of the user preferably indicates any one of the direction of music to be listened to by the user before, after, left, and right of the reference direction. Do.

In order to achieve the above object, the multi-channel digital sound reproduction method according to the present invention sets a signal generation step of generating a multi-channel sound signal from the multi-channel sound source data, and a channel correction matrix set according to the user's position information, And a channel correction step of correcting the multi-channel sound signal using the set matrix and transferring the multi-channel sound signal to a plurality of speakers.

The location information of the user in the channel correction step is information input by the user through the user interface, and the location information of the user is any one of before, after, left, and right of the reference direction of the music to be listened to by the user. It is preferable to indicate one thing.

In order to achieve the above object, the multi-channel digital sound correction apparatus according to the present invention stores a channel correction matrix set by an input unit for receiving a multi-channel sound signal, and a control signal according to the user's position information, the stored And a channel correction unit configured to correct the multi-channel sound signal using a matrix and transmit the multi-channel sound signal to a plurality of speakers.

The location information of the user is information input by the user through the user interface, and the location information of the user preferably indicates any one of the direction of music to be listened to by the user before, after, left, and right of the reference direction. Do.

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

2 is a functional block diagram of a multi-channel digital sound reproduction apparatus according to an embodiment of the present invention.

The multi-channel digital sound reproducing apparatus receives a command input through the sound signal generating unit 30, the user interface 10, and the user interface, and controls the control unit 20 and the control signals of the control unit. In accordance with the channel correction unit 40 for correcting the channel of the speaker and a display for showing the state of the channel and the like and a plurality of speakers. The multi-channel digital sound signal refers to a sound signal generated for at least three speakers, and the sound source data means digital data.

The sound signal generator 30 generates a multichannel sound signal from the multichannel sound source data. 2 shows that the sound reproducing apparatus is a 5.1-channel sound reproducing apparatus, so that the sound signal generator 30 is configured for the front left speaker, the front light speaker, the center speaker, the rear left speaker, the rear light speaker, and the woofer speaker from the 5.1-channel sound source data. Generates a sound signal. The generated sound signal is transmitted to the channel correction unit 40.

The channel correction unit 40 receives the multi-channel sound signal received from the sound signal generator 30 and transmits the sound signal to each speaker through a preset channel correction matrix. The correction matrix is set according to the control signal by the controller 20, and the channel correction matrix will be described later.

The controller 20 controls the respective components of the multi-channel digital sound reproducing apparatus and may generate a control signal by receiving a control command through the user interface 10. In the present invention, when the user interface 10 receives the position information of the user, the controller 20 adjusts the channel correction matrix set in the channel correction unit 40 to enable sound output according to the position of the user.

The user interface 10 transmits a control command input by a user to the controller 20 to control the multi-channel digital sound reproduction apparatus. The user interface 10 may be implemented as a remote control device, or may be implemented as an OSD (On Screen Display) using a touch screen, or may be implemented as a control button attached to a multi-channel digital sound playback device. The user may increase or decrease the volume of the sound or use the equalizer function through the user interface 10, and execute a command such as recording or playback. Meanwhile, the user may change the channel or characteristic of the speakers by inputting user location information through the user interface 10 to change the channel correction matrix.

The display 50 displays the state when the user controls the multichannel digital sound reproduction apparatus. The display unit may be a monitor or a screen, or may be a dot matrix composed of light emitting diodes. Meanwhile, when using the user interface 10 of the OSD, a separate display unit may not be necessary.

The multi-channel digital sound reproducing apparatus is connected with a plurality of speakers for receiving channel sound signals and outputting channel sounds. Speakers can now be connected in a common wired form, and in the near future it is also possible to use wirelessly connected speakers.

The multi-channel digital sound reproducing apparatus according to the present invention may be implemented by including a sound signal generating unit for generating multi-channel sound source data, but instead of the sound generating unit, the multi-channel reproduced by the existing multi-channel digital sound reproducing apparatus The sound signal input unit may be configured to include a sound signal input unit. In other words, the multi-channel digital sound reproduction apparatus and the channel correction apparatus may be separately implemented.

Hereinafter, the channel correction matrix set in the channel correction unit 40 will be described. In the detailed description, a channel may be interpreted as meaning a sound source for one speaker. That is, the front left speaker, front light speaker, rear left speaker, rear light speaker, center speaker, and subwoofer shown in Fig. 1A each reproduce sound from a sound source of one channel. In this case, sound sources for the front left speaker, front light speaker, rear left speaker, rear light speaker, center speaker, and subwoofer are defined as channel 1, channel 2, channel 3, channel 4, channel 5, and channel 6, respectively. When the speaker of the speaker is defined as speaker 1, speaker 2, speaker 3, speaker 4, speaker 5, speaker 6, the sound signal transmitted to the speaker can be defined by Equation 1.

Here, C1 to C6 denote sound signals by sound sources of channels 1 to 6, respectively, and S1 to S6 denote sound signals transmitted to the speakers 1 to 6, respectively. On the other hand, the matrix composed of H11 to H66 is a channel correction matrix having different values depending on the position of the user. The value of H11 to H66 is changed according to the position of the user so that sound suitable for the position of the user is output through the speaker. On the other hand, the general multi-channel digital sound reproduction apparatus can display the sound signal transmitted to the speaker by the equation (2).

Here, n denotes the number of channels, C1 to Cn denote sound signals by sound sources of channels 1 to n, respectively, and S1 to Sn denote sound signals that are transmitted to speakers 1 to speaker n, respectively. On the other hand, the matrix composed of H11 to Hnn is a channel correction matrix having different values depending on the position of the user.

The channel correction matrix set in the channel correction 40 can be easily implemented using an adder, an amplifier, a multiplexer, and a demultiplexer.

A process of setting the channel correction matrix according to the user's location information will be described with reference to FIGS. 3 and 4.

3 shows a channel correction process according to a change in user location according to an embodiment of the present invention.

First, the user inputs user location information using the user interface (s10). The user's location information indicates which direction the user is looking at and in which direction, and the simplest expression of the location information is based on which direction the user is in front, rear, left, and right directions based on the installation direction (reference direction) of the multi-channel digital sound reproducing apparatus. Information indicating whether or not there is. The sound output from each speaker can be adjusted according to the user's location information so that the user can enjoy three-dimensional music at any location. Inputting the user location information through the user interface is the easiest way to set the channel correction matrix of the multichannel digital sound reproducing apparatus. If there is a method of automatically measuring the user's location in the future, the user location information input through the user interface may be replaced with the automatically measured user location information.

When the user's location information is input, it is determined whether the existing location information matches the existing location information (S20). If it does not match the existing position information, that is, if the position information different from the existing position information is input, the channel correction matrix of the channel correction unit is updated (S30). Then, it is determined whether the user location information is properly input through the speaker test process (S40). On the other hand, if the position information that matches the existing position information is input, the speaker is immediately tested without updating the channel correction matrix (s40). The speaker test may use a method of outputting a voice to which speaker each speaker is located. For example, if speaker 1 is set as the front left speaker, the speaker may output the message "Set as front left speaker".

If the speaker test is not complete after the speaker test, the position input is terminated. If not, reset the signal (s50). The resetting process is through the process of S10 to S40.

4 is a diagram illustrating a channel correction process according to a change in user location according to another exemplary embodiment of the present invention.

The user inputs user location information using the user interface (S110).

The user location information may be input in the same manner as the user location information input process of FIG. 3. When the user location information is input, it is determined whether the input location information matches the existing location information (s120). If the location information does not match, the channel correction matrix of the channel correction unit is updated (s130), and the speaker test process (s140). Enter If the input location information matches the existing location information, the system directly enters the speaker test process (s140). Through the speaker test process, the user may determine whether the location information input by the user is correct location information. If the correct position information, the speaker tuning process (s160). If the location information is not correct, the reset process is performed again (s150).

The speaker tuning (s160) is automatically corrected according to the user's position, but the sound transmitted through the speaker is required according to the structure or objects of the actual house is necessary. Through the user tuning the speaker s160, the user can correct the channel in a state in which he or she is most audible. Speaker tuning can be done by simply adjusting the volume of each speaker, but it is possible to change the value of each parameter of the channel correction matrix in consideration of the effect of the direction of the user.

Input of the location information of the user and sound signal values transmitted to the speaker will be described with reference to FIGS. 5A, 5B, 5C, and 5D.

5A, 5B, 5C, and 5D are diagrams showing channels corrected according to user location input on ODS (On Screen Diplay), respectively.

First, referring to FIG. 5A, a user tries to listen to music in a forward direction in which a multi-channel digital sound reproducing apparatus is installed. This is a general direction and is basically set as a user direction unless user location information is input. When the user inputs the forward direction through the OSD, the channel correction matrix is set as shown in Equation 3 below. Each component value of the channel correction matrix according to the position of the user may be a value previously determined as in Equation 3 to Equation 6, or may be a value that is pre-adjusted when the multichannel digital sound reproducing apparatus is first installed.

That is, each speaker outputs the sound output through the terminal originally connected. That is, speaker 1 becomes a front left speaker, speaker 2 becomes a front light speaker, speaker 3 becomes a rear left speaker, speaker 4 becomes a rear light speaker, speaker 5 becomes a center speaker, and speaker 6 becomes a woofer speaker.

Referring to FIG. 5B, the user tries to listen to music while looking at the rear direction in which the multi-channel digital sound reproducing apparatus is installed. In this case, unlike when looking forward, each speaker plays a different role. The channel correction matrix at this time may be set as in Equation 4.

That is, speaker 4 becomes a front left speaker, speaker 3 becomes a front light speaker, speaker 2 becomes a rear left speaker, speaker 1 becomes a rear light speaker, and speaker 6 becomes a woofer speaker. At this time, the role of the center speaker to handle human speech is divided between the speaker 4 and the speaker 3. In other words, speaker 4 outputs the front left speaker sound, but some outputs the sound of the center speaker, and speaker 3 outputs the front light speaker sound, but some outputs the sound of the center speaker. The degree to which the speakers 3 and 4 are responsible for the sound of the center speaker is determined by the value of a in Equation 4. The reason for this is that the center speaker is mainly responsible for the human voice in the movie, which is awkward when the human voice is heard from the back instead of the front. Of course, it is possible to realize the center speaker.

Referring to FIG. 5C, a user tries to listen to music while looking at the right side when the multi-channel digital sound reproducing apparatus is installed. In this case, as with the rear, each speaker has a different role than the front. The channel correction matrix at this time may be set as in Equation 5.

That is, speaker 2 becomes a front left speaker, speaker 4 becomes a front light speaker, speaker 1 becomes a rear left speaker, speaker 3 becomes a rear light speaker, and speaker 6 becomes a woofer speaker. At this time, the role of the center speaker to process human speech is divided into two speakers. The degree to which the speakers 2 and 4 are responsible for the sound of the center speaker is determined by the b value of Equation 5.

Referring to FIG. 5D, a user tries to listen to music while looking to the left when the multi-channel digital sound reproducing apparatus is installed. Again, just like looking backwards, each speaker has a different role than looking forwards. The channel correction matrix at this time may be set as in Equation 6.

That is, speaker 3 becomes a front left speaker, speaker 1 becomes a front light speaker, speaker 4 becomes a rear left speaker, speaker 2 becomes a rear light speaker, and speaker 6 becomes a woofer speaker. At this time, the role of the center speaker to process human speech is divided into two speakers. The degree to which the speakers 1 and 3 are responsible for the sound of the center speaker is determined by the c value of Equation 6.

4 is possible by adjusting the magnitude of each component value of the channel correction matrix. For example, the a, b, and c values may be made larger or smaller, or a certain weight may be given to the one component value. Meanwhile, in the above description, the expression of transmitting a sound signal to the speaker means that the sound signal is transmitted to the speaker connected to the terminal by transmitting the sound signal to the terminal for connecting the speaker. The electric sound signal transmitted to the speaker is output in the air in the form of sound through the speaker.

In the case of using the channel correction matrix, it is possible to easily change the M-channel sound source data into N-channels smaller than M simply. In other words, it is possible to change the 5.1-channel sound into two-channel stereo sound. In this case, it can be calculated by the center equation (7).

S1 and S2 mean signals transmitted to left and right speakers of stereo, respectively. The left speaker carries a 5.1-channel front left and rear left signal and a sound signal multiplied by an appropriate value for the center speaker signal and subwoofer signal, and the light speaker receives 5.1-channel front and rear light signals and the center speaker signal and subwoofer. The sound signal is multiplied by the appropriate value.

By adjusting each component value of the channel correction matrix value, appropriate music can be enjoyed according to the position of the user. In addition, it is also possible to output sound signals of more channels as sound signals of fewer channels.

Those skilled in the art will appreciate that the present invention can be embodied in other specific forms without changing the technical spirit or essential features of the present invention. The above embodiments are set based on a 5.1-channel digital sound reproduction apparatus that is currently in vogue among multi-channel digital sound reproduction apparatuses, but the technical spirit of the present invention is not limited thereto. The technical idea of the present invention is to variably correct the channels of the speaker according to the user's location information, including the case of 4.1 channel, 6.1 channel or other various multi-channel digital sound reproducing apparatus. Therefore, it should be understood that the embodiments described above are exemplary in all respects and not restrictive. The scope of the present invention is indicated by the scope of the following claims rather than the detailed description, and all changes or modifications derived from the meaning and scope of the claims and the equivalent concept are included in the scope of the present invention. Should be interpreted.

According to the present invention, the user can easily change the speaker property of the multi-channel digital sound reproducing apparatus according to the position where he / she wants to listen to music. In other words, unlike the conventional method, it is possible to simply change the property of a speaker using a user interface without changing the terminal of the speaker or moving the speaker.

Claims (30)

A sound signal generator for generating a multichannel sound signal from the multichannel sound source data; And If the received user location information is different from the location information for the reference direction, the channel correction matrix is stored, and the multi-channel sound signal is corrected according to the direction set by the user using the stored matrix and transmitted to the plurality of speakers. Multi-channel digital sound reproduction device comprising a channel correction unit. The apparatus of claim 1, wherein the location information of the user is information input by the user through a user interface. The multi-channel digital sound reproducing apparatus according to claim 2, wherein the user's location information indicates any one of front, rear, left, and right directions of music to be listened to by the user. The multi-channel digital sound reproducing apparatus according to claim 2, wherein the user interface is an On Screen Display (OSD). The corrected sound signal for a plurality of speakers delivered by being corrected by the channel correction matrix

N is the number of channels, C1 to Cn are the multi-channel sound signals, S1 to Sn are the corrected sound signals transmitted to speakers 1 to speaker n, respectively, and H11 to Hnn is a multi-channel digital sound playback device, characterized in that each component value of the channel correction matrix 6. The multichannel digital sound reproducing apparatus according to claim 5, wherein the multichannel sound signal is a 5.1 channel sound signal (n = 6). 7. The sound signal according to claim 6, wherein the corrected sound signal when the user information is forward

C1 is the front left channel sound signal, C2 is the front left channel sound signal, C3 is the rear left channel sound signal, C4 is the rear light channel sound signal, C5 is the center channel sound signal, and C6 is the subwoofer channel. Sound signal, S1 is a calibrated front left channel sound signal, S2 is a calibrated front left channel sound signal, S3 is a calibrated rear left channel sound signal, S4 is a calibrated rear light channel sound signal, and S5 is a calibrated center channel Sound signal, S6 refers to a calibrated subwoofer channel sound signal 7. The sound signal according to claim 6, wherein the corrected sound signal when the user information is backward

A multi-channel digital sound reproducing apparatus, characterized in that a represents the magnitude of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. The sound signal of claim 6, wherein the corrected sound signal is generated when the user information is right.

And b denotes the magnitudes of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. The sound signal of claim 6, wherein the corrected sound signal is generated when the user information is left.

Calculated by c, c denotes the magnitudes of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. A signal generation step of generating a multichannel sound signal from the multichannel sound source data; Receiving user location information and setting a channel correction matrix when the received user location information is different from the location information on the reference direction; And And a channel correction step of correcting the multi-channel sound signal according to a direction set by a user using the set matrix and transmitting the multi-channel sound signal to a plurality of speakers. 12. The method of claim 11, wherein the location information of the user in the channel correction step is information input by the user through a user interface. The multi-channel digital sound reproduction method of claim 12, wherein the user's location information indicates any one of front, rear, left, and right directions of music to be listened to by the user. The method of claim 12, wherein the user interface is an OSD (On Screen Display). 12. The corrected sound signal for a plurality of speakers according to claim 11, wherein the corrected sound signal is corrected and delivered by the channel correction matrix.

N is the number of channels, C1 to Cn are the multi-channel sound signals, S1 to Sn are the corrected sound signals transmitted to speakers 1 to speaker n, respectively, and H11 to Hnn is a multi-channel digital sound reproduction method, characterized in that each component value of the channel correction matrix The method of claim 15, wherein the multichannel sound signal generated in the generating step is a 5.1 channel sound signal (n = 6). 17. The sound signal according to claim 16, wherein the corrected sound signal when the user information is forward

C1 is the front left channel sound signal, C2 is the front left channel sound signal, C3 is the rear left channel sound signal, C4 is the rear light channel sound signal, C5 is the center channel sound signal, and C6 is the subwoofer channel sound. Signal, S1 is a calibrated front left channel sound signal, S2 is a calibrated front left channel sound signal, S3 is a calibrated rear left channel sound signal, S4 is a calibrated rear light channel sound signal, and S5 is a calibrated center channel sound Signal, S6 means a corrected subwoofer channel sound signal 17. The sound signal according to claim 16, wherein the corrected sound signal when the user information is backwards.

Calculated by, wherein a represents the magnitudes of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. 17. The sound signal of claim 16, wherein the corrected sound signal when the user information is right

And b denotes the magnitude of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. The sound signal of claim 16, wherein the corrected sound signal is generated when the user information is left.

C is a magnitude of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. An input unit for receiving a multi-channel sound signal; And If the received user location information is different from the location information for the reference direction, the channel correction matrix is stored, and the multi-channel sound signal is corrected according to the direction set by the user using the stored matrix and transmitted to the plurality of speakers. Multi-channel digital sound correction device comprising a channel correction unit. The multi-channel digital sound correction apparatus of claim 21, wherein the location information of the user is information input by the user through a user interface. The multi-channel digital sound correction apparatus according to claim 22, wherein the location information of the user indicates any one of the direction of music to be listened to by the user before, after, left, and right of the reference direction. 23. The multi-channel digital sound correction apparatus of claim 22, wherein the user interface is an on screen display (OSD). The corrected sound signal of claim 21, wherein the corrected sound signal for the plurality of speakers delivered corrected by the channel correction matrix.

N is the number of channels, C1 to Cn are the multi-channel sound signals, S1 to Sn are the corrected sound signals transmitted to speakers 1 to speaker n, respectively, and H11 to Hnn is a multi-channel digital sound correction device, characterized in that each component value of the channel correction matrix The multi-channel digital sound correction apparatus according to claim 25, wherein the multi-channel sound signal is a 5.1 channel sound signal (n = 6). 27. The sound signal of claim 26, wherein the corrected sound signal is when the user information is the front side.

C1 is the front left channel sound signal, C2 is the front left channel sound signal, C3 is the rear left channel sound signal, C4 is the rear light channel sound signal, C5 is the center channel sound signal, and C6 is the subwoofer channel sound. Signal, S1 is a calibrated front left channel sound signal, S2 is a calibrated front left channel sound signal, S3 is a calibrated rear left channel sound signal, S4 is a calibrated rear light channel sound signal, and S5 is a calibrated center channel sound Signal, S6 refers to a calibrated subwoofer channel sound signal 27. The sound signal of claim 26, wherein the corrected sound signal when the user information is backwards

A multi-channel digital sound compensator characterized in that it represents the magnitude of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. 27. The sound signal of claim 26, wherein the corrected sound signal when the user information is right

And b denotes the magnitude of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal. 27. The sound signal of claim 26, wherein the corrected sound signal when the user information is left

C is a multi-channel digital sound compensator characterized in that it represents the magnitude of the center channel sound signal component values included in the corrected front left channel sound signal and the corrected front light channel sound signal.

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