JPS63151300A - Acoustic electronic equipment - Google Patents

Abstract

PURPOSE:To obtain an optimum sound field for a visual and auditory person by providing a remote commander to transmit a remote control signal, plural reception elements to receive remote control signals, and a correction means to correct sound field, and detecting the position of the user to correct the sound field. CONSTITUTION:Left and right receiver elements 19L and 19R are disposed in symmetrical positions while sandwiching the CRT 2 of a television receiver main body 1. And a remote control signal RM from the remote commander 15 is received, and a reception outputs RML and RMR are outputted to a visual and auditory position detection part 20. A position detection circuit 24 detects the visual and auditory position WP from an angle information signal AUG and a distance information signal DZS, and outputs a visual and auditory position data POS to a control circuit 18. The control circuit 18 outputs control signals SC1 and SC2 based on the visual and auditory position data POS to control the direction of the driving of a speaker via a speaker direction driver 26. And, the sound volumes of sound signals SAL and SAR outputted from a voice reception circuit 10 are respectively corrected.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention is suitable for application to audio-electronic equipment, such as a television receiver that receives stereo broadcast audio signals.

B Summary of the Invention The present invention detects the position of a viewer relative to the audio-electronic equipment and corrects the sound field, thereby
The aim is to provide the optimal sound field to the audience.

C. Prior Art Conventionally, as this type of audio electronic equipment, there is a television receiver that can receive stereo broadcast audio signals using a wireless remote controller (referred to as a remote commander).

In such television receivers, viewers can
By operating the controls on the remote commander, commands such as turning on or off the power, switching the receiving channel, adjusting the volume, etc. can be commanded from a location away from the television receiver main body.

The remote commander sends out a remote control signal (referred to as a remote control signal) made of, for example, infrared rays in response to the operation of the operator. The television receiver itself receives the remote control signal using a receiving element installed inside it, converts it into a digital code, and then inputs it to a control circuit configured with a microcomputer, for example, to execute corresponding processing. ing.

By doing this, the viewer can easily set the receiving operation mode of the television receiver body to a desired state from any position as needed, not only from the front position with respect to the television receiver body. It is possible.

D Problems to be Solved by the Invention However, in general, in television receivers, the sound field obtained from the left and right speakers is formed based on the viewpoint that the viewer is viewing from the front position of the television receiver body. ing.

That is, as shown in FIG. 4, when a viewer views the television receiver body 1 in front of a cathode ray tube (CRT), the viewing position WP and the left speaker 3L of the television receiver body 1 and The lengths of the virtual lines 5IDL and 5IDR connecting the right speaker 3R are equal.

Therefore, by arranging the left and right speakers 3L and 3R symmetrically with respect to the image center line CP of the display screen SCH of the CRT 2, and by making the left and right volumes equal, it is possible to obtain a listening position that provides an optimal sound field. .

However, the remote commander is not connected to the television receiver itself.
Since an operation command can be issued from any direction, in reality, the viewer does not always view the video from the front viewing position wp.

That is, as shown in FIG. 5, when viewing from a viewing position WP where the viewing center line CENoP connecting the center position of the display screen SCR and the viewing position wp does not pass through the image center line CP, the left speaker 3L is heard at a louder volume than the right speaker 3R, which causes a problem in that the volume balance between the left and right speakers 3L and 3R becomes unbalanced.

Therefore, in order to obtain the optimal volume at the viewing position WP, the volume of the left and right speakers 3L and 3R must be adjusted again, and the viewer must repeat this troublesome task every time the viewing position wp is changed. There was an unavoidable problem.

Furthermore, the central axes CPL and CP of the speakers 3L and 3R
Since the angles θ and θ between R and the viewing value zwp are different, if the viewing value WWF deviates greatly compared to the directivity of the speakers 3L and 3R, simply change the direction of the left and right speakers 3L.
There was a problem that not only the volume balance of 3R and 3R but also the localization of the sound image was disrupted.

In such a case, in order to obtain the optimal sound field, the volume balance of the left and right speakers 3L and 3R should be adjusted, and the orientation of the speakers 3L and 3R should be adjusted so that the angles θ1 and θ become predetermined angles. had to be adjusted.

The present invention has been made in consideration of the above points, and it is an object of the present invention to propose an audio-electronic device that allows the viewer to obtain an optimal sound field even if the viewer changes the viewing position.

E Means for Solving the Problem In order to solve this problem, in the present invention, the audio-electronic equipment body 1 is
Remote commander 1 sends a remote control signal RM to
5, a plurality of receiving elements 19R119L provided in the audio-electronic device main body 1 and receiving the remote control signal RM,
Reception output RM+t of receiving element 19R119L, RML
Correction means 3L, 3R110, 18, 20, which detects the position of the remote commander 15 and corrects the sound field based on
25 and 26 are provided.

By receiving the remote control signal RM of the 6-F action remote commander 15 and detecting the position of the remote commander 15,
The position of the viewer who operated the remote commander 15 can be detected.

Therefore, by correcting the sound field based on the detection result, even if the viewer changes the viewing position, an optimal sound field can be obtained at the viewing position.

Embodiment G An embodiment in which the present invention is applied to a television receiver will be described in detail below with reference to the drawings.

In FIG. 1, 5 indicates a television receiver as a whole, and after receiving broadcast waves obtained from an antenna 6 into a high frequency circuit 8 of a receiving section 7, it is transmitted through a video receiving circuit 9 and an audio receiving circuit 10. It outputs a video signal SV and left and right audio signals SAL and SAR, respectively.

The color signal reproducing circuit 11 reproduces red, green, and blue primary color signals V, VG, and 8 from the video signal SV and sends them to the CRT 2. The deflection circuit 12 supplies a drive voltage for the CRT 2 based on the video signal SV, and also drives the deflection yoke 14.

In this way, an image is displayed on the display screen SCR of the CRT 2.

In addition to this configuration, the wireless remote commander 15 which has an operator such as a push button transmits a remote control signal RM consisting of, for example, infrared rays to the receiving element 16 in accordance with the pressed operator, and receives the remote control signal. The signal is converted into digital code data in the detection section 17 and inputted to the control circuit 18 having a microcomputer configuration.

The control circuit 18 provides the receiving unit 7 with a control signal SCI corresponding to the input remote control signal RM.
In addition to turning the power on or off, switching the reception channel, etc., the volume of the audio signals SAL and SAR output to the speakers 3L and 3R is adjusted.

Furthermore, as shown in FIG. 2, left and right receiving elements 19L and 19R are arranged at symmetrical positions across the CRT 2 of the television receiver body 1.

The left and right receiving elements 19L and 19R receive the remote control signal RM from the remote commander 15 and output the received outputs RML and RMR to the viewing position detection section 20.

Here, the fact that the signal level of the reception output RMR (or RML) of the right (or left) receiving element 19R (or 19°L) is large means that the signal level of the reception output RMR (or RML) of the right (or left) side receiving element 19R (or 19L) is high. This means that the distance between the viewing position WP and the right (or left) side receiving element 19R (or 19
This means that the distance from L) is large. From this,
The viewing position detection unit 20 determines the viewing position wp by the following operation.
Detect.

That is, as shown in FIG.
t is amplified respectively, and the subtraction circuit 22 and the addition circuit 2
Output to 3. The subtraction circuit 22 calculates the signal level difference between the received outputs RM+t and RML, and outputs the calculation result to the position detection circuit 24 as an angle information signal AUG of the viewing position angle φ.

In other words, the difference between the signal levels of the received output RM and RML is the viewing position? &WP and the distance dR between the right receiving element 19R
and the distance dL between the viewing position wp and the left receiving element 19L.
By expressing the difference between the angle information signal AU
Based on G, the angle φ (FIG. 2) of the viewing position zwp as seen from the television receiver main body 1 can be determined.

On the other hand, the adder circuit 23 outputs the received outputs RMR and RM
The sum of the L signal levels is calculated, and the calculation result is sent to the position detection circuit 24 as a distance information signal DZS. The sum of the signal levels of the received outputs RMR and RML is the viewing position wp
and the distance dR between the right receiving elements 19R and the viewing position wp.
and the distance dL between the left receiving element 19L, and therefore, the distance d (FIG. 2) between the television receiver main body 1 and the viewing position wp can be determined based on the conversion result.

The position detection circuit 24 determines the position of the viewing position wp from the angle information signal AUG and the distance information signal DZS, and outputs it to the control circuit 18 as viewing position data PO8.

Based on the viewing position data pos, the control circuit 18 controls the sound field correction data memory 2 having a read-only memory configuration, for example.
After reading the sound field correction data COR from 5, based on this, control signals SCI and SC2 are outputted to drive and control the direction of the speaker via the speaker direction driving device 26, and the sound field correction data COR is outputted from the audio receiving circuit 10. audio signal S
Correct the volume of AL and SAR respectively.

That is, as shown in FIG. 2, speakers 3L and 3R
By correcting the directions of the speakers 3L and 3R so that the virtual lines 5IDL and 5IDR connecting the central axes CPL and CPR and the viewing positions wp of the speakers 3L and 3R coincide with each other, the viewing angle caused by the difference in the orientation of the speakers 3L and 3R is corrected. Correct the disturbance in the localization of the sound image at the position WP.

Furthermore, the difference dL-d between the distances to the speakers 3L and 3R
The left and right speakers 3L at the viewing position caused by
and 3R is corrected, and the balance of the sound volumes of the left and right speakers 3L and 3R at the viewing position WWP is corrected.

In this way, the control circuit 18 controls the viewing position detection section 20,
Sound field correction data memory 25, speaker direction drive device 26
, the audio receiving circuit lIr10 and the speakers 3L and 3R constitute means for correcting the sound field formed by the speakers 3L and 3R.

(Even if the viewing position is changed, there is no need to make troublesome sound field correction adjustments at the viewing position WP.)
You can get the optimal sound field.

According to the above configuration, the position of the remote commander can be detected and the sound field can be corrected, so that the direction of the left and right speakers and the balance of volume can be adjusted every time the viewer changes the viewing position. Therefore, it is possible to obtain the optimum sound field at the relevant viewing position.

In the embodiment shown in FIG. 1, infrared rays and the mote commander 15 are used, but instead of this, various configurations such as ultrasonic waves or mote commanders may be used to achieve the same effect as described above. effect can be obtained.

Furthermore, in the embodiments described above, the remote control signal RM
In addition to the receiving element 16 for reception, we have described the case where the receiving elements 19R and 19L for position detection are separately used.
Alternatively, the receiving element may be used both as a receiving element for position detection and a receiving element for receiving control signals.

Furthermore, in the above embodiment, depending on the position of the viewer,
Although the case has been described in which the volume of the speaker is corrected together with the direction of the speaker, the present invention is not limited to this. For example, if the directivity of the speaker is dull, it is sufficient to correct only the volume of the speaker. The direction and/or volume of the speaker may be corrected within a practically sufficient range.

Furthermore, since the directivity of the speaker changes depending on the pitch of the sound obtained from the speaker, it may be possible to correct not only the volume of the speaker but also the frequency characteristics of the audio signal obtained from the speaker. .

In addition, when correcting the direction of the speakers, for example, if the speakers are installed separately for treble and bass, it is necessary to not only correct the direction of both the treble and bass speakers, but also correct the direction of the treble and bass speakers. Only the direction of the speaker may be corrected.

Furthermore, in the above embodiment, a case was described in which the orientations of two speakers are corrected at the same time, but it is also possible to correct the orientation of only one speaker so that the orientations of the left and right speakers with respect to the viewing position are equal. It's okay.

Furthermore, in the above embodiment, a case was described in which the direction of the speaker and the balance of the volume are corrected, but for example, when the viewing position changes to a position far away from the previous viewing position, the correction is made according to the distance information DZS. The sound field may be corrected by increasing the volume of the left and right speakers.

Further, in the above-described embodiment, the present invention is applied to a television receiver that forms a sound field using two left and right speakers for the right channel and left channel, but the present invention is not limited to this. It can also be applied to the case where a sound field is formed using one or more speakers or one speaker.

Further, the present invention is not limited to television receivers, but can be widely applied to audio electronic equipment such as stereos.

Effects of the Invention As described above, according to the present invention, even if the viewer changes the viewing position, the optimal sound field can be obtained according to the viewing position. This eliminates the need for sound field correction operations.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the television receiver according to the present invention, FIG. 2 is a route map for explaining its operation, FIG. 3 is a block diagram showing its viewing position detection section, and FIG. 4 and FIG. 5 are route maps for explaining changes in the sound field due to changes in the listening position. 1...Television receiver, 2...C
RT, 3L, 3R...Speaker, 15...
...Remote commander, 16.19R, 19L...
...Receiving element, 18...Control circuit, 2o...
. . . Viewing position detection unit, 25 . . . Sound field correction data memory.

Claims (3)

[Claims] (1) A remote commander that sends a remote control signal to the audio-electronic equipment main body from a position away from the audio-electronic equipment main body, and a plurality of receiving elements that are provided on the audio-electronic equipment main body and receive the remote control signals. and a correction means for detecting the position of the remote commander and correcting the sound field based on the reception output of the reception element. (2) The audio-electronic device according to claim 1, wherein the sound field correction means is a correction means for correcting the volume of a speaker forming the sound field. (3) The audio-electronic device according to claim 1 or 2, wherein the sound field correction means is a correction means for correcting the direction of a speaker forming the sound field.