KR20050056647A - Apparatus and method for controlling output of speaker in multi channel audio system - Google Patents

Abstract

The present invention is to monitor and track the position of the listener in two dimensions, and to adaptively control the speaker output level and delay time of the front left and right and rear left and right based on this, the present invention provides a user Unlike the conventional method of manually adjusting the output level and the delay time for each speaker of the multi-channel, a position sensor is mounted on each of the front left and right speakers, and the position of the listener is two-dimensionally by using these position sensors. By monitoring and tracking and adaptively and automatically controlling the output level and delay time of the front left and right speakers and the rear left and right speakers as the listener moves, the user's ease of use can be greatly improved and the sound of the sound listeners can be improved. It can improve listening satisfaction.

Description

Speaker output control device of multi-channel audio system {APPARATUS AND METHOD FOR CONTROLLING OUTPUT OF SPEAKER IN MULTI CHANNEL AUDIO SYSTEM}

The present invention relates to an audio system, and more particularly, a multichannel audio system suitable for controlling speaker output and delay time of an audio system having multichannel speakers such as 5.1 channel and 7.1 channel for each speaker based on the position of the listener. Relates to a speaker output control device.

As is well known, multi-channel speakers, especially for 5.1-channel front center (F-C) speakers, front light (F-R) speakers, front left (F-L) speakers, rear light (R-R) speakers, It consists of rear left (R · L) speakers and woofer (W · F) speakers, in which the audio system decodes the audio signal and converts it into a 5.1 channel signal, and converts the signal of each converted channel into the corresponding speaker. By outputting to, the listener can listen to the sound output through the speaker.

In the case of the 5.1 channel as described above, the user manually inputs the settings for the audio output level and the delay time for each speaker. In this case, the user typically inputs the center position where the listener is at the same distance from each speaker. It is set on the assumption that it is in.

However, in the case of the conventional method as described above, the user has to set the output level and the delay time of each speaker to a desired value one by one, causing inconvenience in use, and in particular, a position other than the center position of each speaker. That is, when listening to the sound while moving to the rear, left, right, both sides, there is a problem that the sound itself feels heterogeneous.

Accordingly, the present invention is to solve the above problems of the prior art, it is to monitor and track the position of the listener in two dimensions, and based on this adaptively automatically adjusts the speaker output level and delay time of the front left and right and rear left and right An object of the present invention is to provide a speaker output control apparatus of a multichannel audio system that can be controlled.

In order to achieve the above object, the present invention provides a device for controlling the speaker output of a multi-channel audio system including at least the front left and right speakers and the rear left and right speakers, the position between the front right speaker and the listener and corresponding Means for determining a right angle, means for detecting a position between the front left speaker and the listener and determining a corresponding left angle, and a plurality of reference left and right angle values corresponding to the right and left angles. A storage means having stored movement coordinate values, and determining a movement coordinate value of the listener by comparing the determined right and left angles with the reference left and right angle values, and based on the determined movement coordinate values, the listener and the front left and right sides are determined. Means for calculating distance values between the speaker and the rear left and right speakers, respectively; Provided is a speaker output control apparatus of a multi-channel audio system including means for adjusting the output level and the delay time of the front left and right speakers and the rear left and right speakers based on the calculated distance values.

The above and other objects and various advantages of the present invention will become more apparent from the preferred embodiments of the present invention described below with reference to the accompanying drawings by those skilled in the art.

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

The key technical aspect of the present invention is that, unlike the above-described conventional method in which the user manually adjusts the output level and delay time for each of the speakers of the multi-channel, the position sensors are mounted on each of the front left and right speakers, and these positions By using the sensor to monitor and track the position of the listener in two dimensions, and adaptively automatically control the output level and delay time of the front left and right speakers and rear left and right speakers as the position of the listener moves, The object of the present invention can be easily achieved.

1 is a block diagram of a speaker output control apparatus of a multi-channel audio system according to an exemplary embodiment of the present invention. The first position sensor 102, the second position sensor 104, the angle detection block 106, and the movement of the speaker output control apparatus are shown. Coordinate value determination block 108, storage block 110, audio decoding block 112, and control block 114.

Referring to FIG. 1, the first position sensor 102 is mounted on a predetermined portion of the front side of the front right side (front light: F · R) speaker 206, as shown in FIG. 2 as an example. By sensing the position of the listener in the listening area, the sensed right position detection signal is transmitted to the angle detection block 106. Also, as shown in FIG. 2, the second position sensor 104 is mounted on a predetermined portion of the front side of the front left (front left: FL) speaker 208 and is located within the sound listening area. By sensing the position of the listener, the detected left position detection signal is transmitted to the angle detection block 106.

Next, the angle detecting block 106 is arranged in parallel with the front left and right speakers based on the listener's right position detection signal and left position detection signal provided from the first and second position sensors 102 and 104, respectively. The angle β between the parallel line S and the listener is detected from the first position sensor 102 based on S), and the angle α between the parallel line S and the listener is started from the second position sensor 104. The angle values between the detected first and second position sensors and the listener are transmitted to the moving coordinate value determination block 108.

Then, the moving coordinate value determination block 108 determines the coordinate values of the new moving position based on the angles α and β provided from the angle detection block 106, that is, to the reference angles α and β stored in the storage block 110. Determine the moving coordinate values corresponding to the angles α and β detected in the coordinate table according to the above, and calculate the distance from the new moving position to each speaker (ie, front left and right speakers and rear left and right speakers) using the determined movement coordinate values. The calculated new moving position of the listener and the distance value (distance information) between the speakers are transmitted to the control block 114.

To this end, the storage block 110 stores the moving coordinate values corresponding to the various reference angles α and β as table values. In this case, the moving coordinate value determination block 108 has the same values as the detected angles α and β. If the reference angles α and β do not exist, the closest values are determined as the corresponding reference angles α and β to determine corresponding movement coordinate values.

Meanwhile, the audio decoding block 112 decodes an audio signal to be output through a multichannel speaker, that is, converts the audio signal into a 5.1 channel signal by inputting the audio signal, and the audio signal of the 5.1 channel converted as described above is a control block ( 114).

Next, the control block 114 adaptively adjusts the output level and delay time of the front left and right speakers and the rear left and right speakers based on the new moving position and the distance value between each speaker provided from the moving coordinate value determining block 108. That is, the output level and the delay time of the front right speaker 206 are determined based on the distance value between the new moving position and the front right speaker 206 and the audio signal is output accordingly. Determining the output level and delay time in the front left speaker 208 based on the distance value between 208, and outputs the audio signal accordingly, rear right based on the distance value between the new moving position and the rear right speaker 210 Determining the output level and delay time in the speaker 210 and outputting the audio signal accordingly, the new moving position and the rear left speaker And on the basis of the distance value between the (212) determines the output level and the delay time of the rear-left speaker 212 outputs an audio signal thereof.

Here, the output F · C at the control block 114 represents the audio output to the front center speaker 204 shown in FIG. 2, and the output W · F at the control block 114 is the woofer shown in FIG. 2. Audio output to the speaker 214 is shown, and reference numeral 202 in FIG. 2 denotes an audio main body.

As an example, as shown in FIG. 2, assuming that the position of the listener has moved from A to B, the x, y coordinate value of the position A of the listener before moving is (0, 0), and is moved. If the coordinate value of the position is determined to be (-1, -1), the distance from the position (B) where the listener is moved to each speaker (ie, front left and right speakers and rear left and right speakers) can be calculated, and the magnitude of the distance Since the order is F · R <R · R <F · L <R · L, the output level and delay time of each speaker may be determined as shown in Table 1 below.

Output level (dB) Latency (mS) F, L 0 0 F-R -One 0 R, L +7 0 R +5 0

Accordingly, the listeners can listen to the optimum sound through the speaker through which the output level and the delay time are adaptively controlled in accordance with the listener's position through the series of processes described above.

Next, a process of adaptively and automatically controlling the output levels and delay times of the front left and right speakers and the rear left and right speakers of the 5.1 channel using the speaker output control device having the above-described configuration will be described.

3 is a flowchart illustrating a process of adaptively and automatically controlling the output of each speaker while two-dimensionally monitoring and tracking the position of the listener according to the present invention.

Referring to FIG. 3, when performing the listening mode of the audio system (step 302), the first and second position sensors 102 and 104 detect the position of the listener (right and left position detection respectively) (step 304). Next, in the angle detecting block 106, the parallel line (starting with the first position sensor 102 based on the parallel line S with the front left and right speakers based on the right position detection signal and the left position detection signal). The right angle between S) and the listener is detected, and the left angle between the parallel line S and the listener is detected based on the second position sensor 104 (step 306).

Next, the moving coordinate value determination block 108 searches the storage block 110 to determine the reference left and right angle values corresponding to the detected right and left angles among the stored reference left and right angle values, and determines the determined reference left and right. The moving coordinate value corresponding to the side angle value is determined as the moving coordinate value of the listener (step 308).

In addition, the movement coordinate value determination block 108 calculates each distance value between the listener and the front left and right speakers and each distance value between the listener and the rear left and right speakers based on the determined movement coordinate value of the listener (step 310). Herein, the distance values between the listener and the front and rear left and right speakers may be determined by using a calculation formula or by presetting them to correspond to movement coordinate values and storing them in the storage block 110.

Finally, in the control block 114, the output levels of the front left and right speakers and the rear left and right speakers are based on the calculated distance values, that is, the position of the listener, the distance values of the front left and right speakers, and the distance values of the right and left speakers. Each delay time is determined (set), and the outputs of the front left and right speakers and the rear left and right speakers are adaptively controlled based on the determined output level and the delay time, respectively (step 312).

Therefore, since the output of the front left and right speakers and the rear left and right speakers are automatically controlled while two-dimensionally monitoring and tracking the positional movement of the listener, the listeners can listen to the optimum sound anywhere in the listening area of the sound.

As described above, according to the present invention, unlike the above-described conventional method in which the user manually adjusts the output level and the delay time for each speaker of the multi-channel, the position sensor is mounted on each of the front left and right speakers, By using the position sensor to monitor and track the position of the listener in two dimensions, and adaptively automatically control the output level and delay time of the front left and right speakers and rear left and right speakers according to the position movement of the listener, the user convenience Not only can greatly improve the performance of the sound, but also improve the sound listening satisfaction of the sound listeners.

1 is a block diagram of an apparatus for controlling speaker output of a multichannel audio system according to an exemplary embodiment of the present invention;

2 is a view illustrating a principle of controlling the output of each speaker while monitoring and tracking the position of the listener according to the present invention;

3 is a flowchart illustrating a process of adaptively and automatically controlling the output of each speaker while two-dimensionally monitoring and tracking the position of the listener in accordance with the present invention.

<Description of the code | symbol about the principal part of drawing>

102, 104: position sensor 106: angle detection block

108: moving coordinate value determination block 110: storage block

112: audio decoding block 114: control block

Claims (2)

An apparatus for controlling speaker output of a multichannel audio system comprising at least front left and right speakers and rear left and right speakers, Means for sensing a position between the front right speaker and a listener and determining a corresponding right angle; Means for sensing a position between the front left speaker and a listener and determining a corresponding left angle; Storage means for storing a plurality of moving coordinate values according to preset reference left and right angle values corresponding to the right and left angles; The moving coordinate value of the listener is determined by comparing the determined right and left angles with the reference left and right angle values, and based on the determined moving coordinate values, distance values between the listener, the front left and right speakers, and the rear left and right speakers are determined. A means for calculating each, Means for adjusting output levels and delay times of the front left and right speakers and the rear left and right speakers based on the calculated distance values; Speaker output control device of a multi-channel audio system comprising a. The method of claim 1, The distance value calculating means may include moving coordinate values according to the reference left and right angle values having the closest angle value when there are no angle values corresponding to the determined right and left angles among the plurality of reference left and right angle values. Speaker output control device of a multi-channel audio system, characterized in that determined by the movement coordinate value.