KR19980014544A - Automatic adjustment of delay time of surround signal - Google Patents

Abstract

The present invention relates to an apparatus for automatically adjusting a delay time of a surround signal, and more particularly, to a delay time automatic adjustment apparatus for a surround signal, which comprises a reference delay time data storage unit for storing reference delay time data for installation positions of surround speakers (SSP1, SSP2) A voice generating unit 26 for generating a voice signal for detecting the distance between the surround speakers SSP1 and SSP2 and applying the voice signal to the surround speakers SSP1 and SSP2 alternately, A voice detection unit 28 for picking up voice signals of the respective channels output from the surround speakers SSP1 and SSP2, a human body sensing unit 30 for sensing the human body, And receives the signals from the sound collecting unit 28 and the human body sensing unit 30 to grasp the current position of each of the surround speakers SSP1 and SSP2 and the viewer, And a control unit 32 for automatically adjusting a delay time for the surround speakers SSP1 and SSP2 of each channel on the basis of the surroundings of the surround speakers SSP1 and SSP2 so that the viewer (or the listener) can easily hear the optimum surround sound I will.

Description

Automatic adjustment of delay time of surround signal

The present invention relates to an apparatus and method for automatically adjusting a delay time of a surround signal, and more particularly, to a method and apparatus for automatically adjusting a delay time of a surround signal according to an installation position of a surround speaker and a position of a viewer, Time automatic adjustment device.

As is well known, in accordance with the tendency of the television to function more sophisticatedly, for the audio signals contained in the broadcasting signals transmitted from the broadcasting station, a stereophonic system or a plurality of In a voice multiplexing system for selectively listening to a language and a difference between voice signals of a plurality of channels in the video reproducing apparatus (that is, a time difference is slightly different from an output of the main speaker due to a delay of a voice signal for a predetermined time) A surround method for obtaining a surround effect and the like are applied to improve the quality of a sound. Accordingly, a device to which such a surround method is applied, that is, a surround device has been developed and used.

Such a surround device plays an important role in promoting the boom of a home theater system in combination with the combination of audio and visual started with the emergence of a home VCR. In addition, Dolby Surround system, which is a stereoscopic sound reproducing device for the theater, (Digital Signal Processing) technology has been developed along with the development of digital video devices such as a laser disk player (LDP) and the like. , It reproduces pure original sound and offers stereo sound surround which can feel the maximum sense of presence.

As described above, a speaker of a conventional surround apparatus providing stereo sound surround usually combines with a main speaker system of a television to provide a more realistic sound to a viewer. The user (viewer or listener) Not only the sense of presence that is felt depending on the installation position of the speaker is changed but also the sense of presence which is felt depending on the viewing position (or listening position) of the user (viewer or listener) is greatly changed. Therefore, In addition to having to adjust several times, the user also inconvenienced to be in the middle of the speakers, for example.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a method and apparatus for automatically adjusting a delay time of a surround signal according to a location of a surround speaker, And an automatic delay time adjusting device for the surround signal to provide the best feeling of presence to the listener.

In order to achieve the above object, according to a preferred embodiment of the present invention, there is provided a speaker apparatus including a reference delay time data storage unit for storing reference delay time data on installation positions of L and R channel surround speakers and viewer positions, A sound generating unit for generating an audio signal for detecting a distance of the surround speakers and alternately applying the audio signal to the surround speakers, a voice collecting unit for collecting voice signals of the respective channels generated by the sound generating unit and output through the surround speakers, And a control unit for controlling the generation of the alternate voice and the output operation of the alternate voice and receiving the signals from the voice collecting unit and the human body sensing unit to grasp the current position of each of the surround speakers and the viewer, Based on the reference delay time data, the delay time for each channel's surround speakers is automatically There is provided an apparatus for automatically adjusting the delay time of a surround signal including a control unit for adjusting the delay time of the surround signal.

According to the embodiment of the present invention configured as described above, when the voice signal from the voice generating unit is alternately outputted through the surround speakers of the L and R channels and is collected by the voice collecting unit and applied to the control unit, The current position of the surround speaker of each channel is determined on the basis of the audio signal, and the current position of the viewer is determined based on the signal from the human body sensing unit. Therefore, the detected signal is compared with the reference delay time data The delay time of the surround speaker of the channel is adjusted optimally.

1 is a block diagram of an apparatus for automatically adjusting a delay time of a surround signal according to a preferred embodiment of the present invention.

Description of the Related Art [0002]

10 --- tuner, 12 --- voice IF module,

14 --- audio signal processor, 16 --- audio amplifier,

18 --- surround processing section, 20 --- voice amplification section,

22 --- Control function setting section, 24 --- Reference delay time data storage section,

26 --- voice generating unit, 28 --- voice picking unit,

30 --- Human body detection part, 32 --- Control part.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, an embodiment of an apparatus for automatically adjusting a delay time of a surround signal according to the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 is a block diagram of an apparatus for automatically adjusting a delay time of a surround signal according to a preferred embodiment of the present invention. The embodiment of the present invention includes a tuner 10, a voice IF module 12, a voice signal processor 14, The control unit 20 includes a voice amplifying unit 16, a surround processing unit 18, a voice amplifying unit 20, a control function setting unit 22, a reference delay time data storing unit 24, a voice generating unit 26, A human body sensing unit 30, and a control unit 32. [

In the figure, the tuner 10 selects a broadcast channel based on a channel selection signal VT applied from a control section 32, which will be described later, among the broadcast signals received by the antenna.

The audio IF module 12 amplifies and detects an audio signal of a broadcast channel selected by the tuner 10, and outputs the amplified audio signal.

The audio signal processing unit 14 processes the audio IF amplified and detected audio signals output from the audio IF module 12 in a stereo or voice multiplexing manner and controls the volume adjustment .

The audio amplifying unit 16 amplifies the audio signals of the L channel and the R channel processed by the audio signal processing unit 14 and outputs them as audio signals output by the main speakers MSP1 and MSP2 as audio output devices.

The surround processing unit 18 processes the delay time when the audio signal is outputted to the surround speakers SSP1 and SSP2 in the case of the television receiving the airwave signal and in the case of Dolby Surround, And processes the delay time of the channel output to the speakers SSP1 and SSP2.

The audio amplifying unit 20 amplifies the audio signals of the L channel and the R channel processed by the surround processing unit 18 and outputs them as audio signals output by the surround speakers SSP1 and SSP2 as surround audio output devices.

The control function setting unit 22 is usually a control panel installed on a front surface of the television or a remote control for remote control of the television, and is used for tuning a broadcast channel for the television, adjusting the volume, adjusting brightness or contrast Can be set.

The reference delay time data storage section 24 stores the reference delay time data stored in the reference delay time data storing section 24 as the optimum delay time for the current position where the L and R channel surround speakers SSP1 and SSP2 are installed apart from the television main body, And stores the time data in the form of a lookup table in advance.

Under the control of the control unit 32, which will be described later, the voice generating unit 26 generates voice signals for detecting the distances of the surround speakers SSP1 and SSP2, and outputs the generated voice signals to the L and R channel surround speakers (SSP1, SSP2) side to be outputted.

The voice collection means 28 is electrically connected to a control unit 32 to be described later and is installed at a position where a voice signal output from the surround speakers SSP1 and SSP2 can be collected The voice signals from the surround speakers SSP1 and SSP2 are collected and converted into electrical signals, which are then applied to the control unit 32. The voice collection unit 28 may be a microphone.

The human body sensing unit 30 performs a human body sensing operation under the control of a control unit 32 to be described later, and then applies the sensing signal to the control unit 32. [

For example, the human body sensing unit 30 may be a set of a plurality of light emitting / receiving elements, and may be installed at a predetermined position of the television main body while maintaining a certain distance therebetween, under the control of the control unit 32 And performs a light emission / light reception operation to detect a viewer. At this time, the light emitting regions and the light receiving regions of the plurality of light emitting / receiving elements implemented in the set are not overlapped with each other.

The control unit 32 controls the operation state of the television according to the control function from the control function setting unit 22 and controls the operation of the sound generating unit 26 during the automatic adjustment of the delay time of the surround signal, (SSP1, SSP2) to be inputted through the voice collecting means (28), and the audio signals are outputted through the surround speakers (SSP1, SSP2) (I.e., a distance corresponding to the installation position) based on the time of each channel, and simultaneously grasps the current position of the viewer based on the signal of the human body sensing operation in the human body sensing unit 30 And automatically adjusts the delay time for the surround speakers SSP1 and SSP2 based on the reference delay time data for the identified information.

Here, the automatic adjustment of the delay time of the surround signal may be performed at the initial stage when the television of the present invention is turned on, and the position of the user may be changed even after the detection of the position of the surround speakers SSP1 and SSP2 is reset The automatic adjustment operation of the delay time may be continued in the ON state of the power source.

Next, the operation of the apparatus for automatically adjusting the delay time of the surround signal according to the embodiment of the present invention will be described.

Once the user turns on the power of the television using the control function setting unit 22, the control unit 32 performs the automatic adjustment of the delay time of the surround signal. The voice generator 26 is controlled to generate voice and the generated voice is output from the surround speaker SSP1 of the L channel through the path of the L channel in the voice amplifier 20, The current distance of the surround speaker SSP1 (that is, the distance to the television main body according to the installation position) is recognized based on the signal of the L channel picked up and applied by the voice collecting means 28. [

Then, the controller 32 controls the voice generator 26 to generate voice, and the generated voice is primarily transmitted through the R channel in the voice amplifier 20, And outputs the signal to the surround speaker SSP2 and outputs the current distance of the surround speaker SSP2 based on the signal of the R channel picked up and collected by the sound collecting means 28 Distance).

When the current distance of the surround speakers SSP1 and SSP2 is detected by the alternate voice generation and output operation, the controller 32 controls the human body sensing unit 30 to detect a viewer, (I.e., the viewing distance) of the viewer by using the time difference due to the light emission and the light reception.

Accordingly, the control unit 32 decodes the reference delay time data in the reference delay time data storage unit 24 based on the current position of the surround speakers SSP1 and SSP2 and the current position of the viewer, And the surround processing operation for the L and R channels in the surround processing unit 18 is controlled to adjust the delay time for the output sound of each of the surround speakers SSP1 and SSP2. In other words, for example, when the viewer is located on the left side (i.e., the side of the L-channel surround speaker SSP1) with respect to the front of the television main body and the current position of the L-channel surround speaker SSP1 is the R- The delay time of the surround speaker SSP2 of the R channel is adjusted to be slightly earlier than the delay time of the surround speaker SSP1 of the L channel. Also, in other cases, the adjustment method described above may be similarly applied.

According to the present invention, since the delay time of the surround speakers of the L and R channels is automatically adjusted regardless of whether the surround speakers of the L and R channels are installed or the viewer is located at any position, The listener) can easily hear the optimum surround sound.

Claims (1)

A reference delay time data storage unit 24 for storing reference delay time data for installation positions of the L and R channel surround speakers (SSP1, SSP2) and the viewer's position, A voice generator 26 for generating a voice signal for detecting the distance between the surround speakers SSP1 and SSP2 and alternately applying the voice signal to the surround speakers SSP1 and SSP2, Voice collecting means 28 for collecting voice signals of the respective channels generated by the voice generating unit 26 and outputted through the surround speakers SSP1 and SSP2, A human body detecting unit 30 for detecting a human body, (SSP1, SSP2) and the current position of the viewer by receiving the signals from the voice collecting unit 28 and the human body sensing unit 30 by controlling the alternate voice generation and the corresponding output operation And a control unit (32) for automatically adjusting a delay time for surround speakers (SSP1, SSP2) of each channel on the basis of the reference delay time data. .