JPH0670399A - Sound field correction device - Google Patents

Abstract

PURPOSE:To provide the sound field correction device capable of setting an optimum sound field with a simple operation. CONSTITUTION:A DSP circuit 1 simulates plural sound fields. An operation section 3 is provided with a category display key 3a and a category selection key 3b to select its category. When the category of a sound field is displayed on a screen by depressing the category display key 3a and the category is selected by depressing a category selection key 3b, a microcomputer 2 controls the DSP circuit 1 so as to select sequentially the sound field mode in the selected category for each 2sec. While the user listens the sound and operates a prescribed key of the operation section 3, when the user senses an optimum sound field mode, the sound field mode is fixed at a point of time of the operation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sound field correction device used in AV (audio / visual) equipment having a voice demodulation processing function.

[0002]

2. Description of the Related Art With the advancement of multimedia in AV equipment such as satellite broadcasting, rental video, video discs, compact discs, etc., there is a growing need to enjoy not only video but also audio with a more realistic sensation. . Therefore, the DSP that simulates a realistic sound field by analyzing the pattern of the reflected wave of the actual sound field, artificially generating reverberant sound based on this, and adding it to the original sound signal Digital Surround Processor) technology is becoming popular. By the way, as shown in FIG. 6, the pulse response of the sound field is composed of an initial reflected sound and a reverberant sound in addition to the direct sound. Here, it is the early reflection sound and the reverberation sound that form the sound field. Various sound fields can be simulated by manipulating the delay time of the initial reflection sound and reverberation sound, the time interval between the initial reflection sound and the reverberation sound, and the signal level of the initial reflection sound and the reverberation sound. .

FIGS. 5A to 5C show an example of a conventionally used sound field mode. In the conventional sound field correction device, for example, MOVIES, SPO of FIGS.
Operation keys corresponding to large categories such as RTS and MUSIC (hereinafter, these are MOVIES key, SPOR
The TS key and the MUSIC key are provided, and the user operates any one of the operation keys corresponding to these three categories to first move the MOVIES, SPORTS, and MUSI keys.
A large category of C is selected, and a desired sound field mode is selected from the category by, for example, ten keys.

FIG. 3 is a flowchart showing a sound field mode selecting operation in the conventional sound field correcting apparatus. In step (S) 1, it is determined whether or not the MOVIES key has been pressed. If the MOVIES key has been pressed, in S19, the process shown in FIG.
The MOVIES mode shown in (A) is displayed on the screen, and the process returns to S1. If it is determined in S1 that the MOVIES key has not been pressed, in S2 the MOV shown in FIG.
It is determined whether the IES mode is being displayed. If it is being displayed, it is determined in S3 whether the sound field mode selection key is pressed. If the sound field mode selection key is not pressed, S
Return to 1 and if the sound field mode selection key is pressed, S4 ~
Each sound field is set in S6, and the process returns to S1.

If the MOVIES mode is not being displayed in S2, the process proceeds to S7 and the SPORTS mode processing is performed. The processing of the SPORTS mode of S7 to S12 and S20 is the same as the processing of the MOVIES mode described above, and the description thereof will be omitted. Furthermore, if the SPORTS mode is not being displayed in S8, the process proceeds to S13 and the MUSIC mode process is performed. MU of S13 to S18 and S21
Since the processing in the SIC mode is the same as the processing in the MOVIES mode, the description thereof will be omitted.

Through the above processing operations, the user can select the optimum sound field from all nine sound field modes by using the MO
It is necessary to first select one of the categories of VIES, SPORTS, and MUSIC, and then select the desired sound field mode from each category.

[0007]

The operation of selecting the sound field mode in such a conventional sound field correcting apparatus is very troublesome, and if the selected sound field mode does not match the currently listening source. There was a problem that it was troublesome to select the desired sound field mode, because the selection operation had to be performed again from the beginning. The present invention has been made in view of the above problems, and an object of the present invention is to provide a sound field correction apparatus capable of setting an optimum sound field with a simple operation.

[0008]

In order to solve the above-mentioned problems of the prior art, the present invention provides a sound field simulation means for simulating a plurality of sound fields, adding them to an input voice signal, and outputting the added sound field. An operation means for selecting a sound field mode simulated by the sound field simulation means, and a control means for controlling the sound field simulation means according to an operation of the operation means, the control means comprising: The sound field correction device is characterized in that the sound field mode is sequentially switched at predetermined time intervals, and the sound field mode is fixed when the operating means is operated.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The sound field correction apparatus of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a block diagram showing the configuration of an embodiment of the sound field correction apparatus of the present invention, and FIG. 2 is a flowchart showing the sound field mode selection operation in the sound field correction apparatus of the present invention.

First, the configuration of an embodiment of the sound field correction apparatus of the present invention will be described. In FIG. 1, left and right audio signals are input to a DSP circuit (sound field simulation means) 1, which simulates, for example, the above-mentioned 9 kinds of sound field modes, and adds and outputs the input audio signals. The microcomputer (control means) 2 controls the DSP circuit 1 in accordance with the operation of the operation section (operation means) 3 and also the operation section 3
The R, G, B signals for displaying on-screen the information according to the operation of (1) on a display unit such as a cathode ray tube (not shown) and the color signal processing circuit (not shown) are output from a microcomputer (hereinafter, microcomputer) 2 YS which is a switching signal for switching to R, G and B signals for screen display
Output a signal. The operation unit 3 has MOVIES and SPOR.
A category display key 3a for displaying on-screen the categories of TS and MUSIC as shown in FIG. 4, a category selection key 3b which is, for example, a ten-key for selecting these categories, and other various keys are provided. Has been. The operation unit 3 is, for example, a remote controller.

Next, the operation of selecting the sound field mode in the sound field correction apparatus of the present invention will be described. In FIG. 2, S
At 31, it is determined whether the category display key 3a is pressed, and if the category display key 3a is pressed, S32
Display the categories as shown in Fig. 4 and press S31 again.
Return to. If the category display key 3a is not pressed in S31, it is determined in S33 whether the category is displayed. If the category is displayed, S34
Determines whether the category selection key 3b has been pressed, and if the category selection key 3b has not been pressed, S3
Returning to step 1, if pressed, S35 to S37 display FIGS. 5 (A) to 5 (C) corresponding to the respective categories, and further, in S38 to S40, the sound fields are respectively displayed, for example.
Initialize to SIMULATED, RING SIDE, and JAZZ CLUB.

However, if the category is not displayed in S33, it is determined in S41 whether any of the sound field modes shown in FIGS. 5A to 5C is displayed, and if not displayed, the process proceeds to S31. Return. If it is displayed, it is determined in S42 whether any key is pressed,
If any key is pressed, the mode is fixed to the currently set sound field, the display of FIGS. 5A to 5C is cleared in S43, and the process returns to S31. Here, a sound field mode setting key may be specially provided to set (fix) the sound field mode, and the sound field mode may be fixed by operating this sound field mode setting key. The sound field mode is fixed when an arbitrary key provided in the section 3 is pressed.

If an arbitrary key is not pressed in S42,
5A to 5C are currently displayed in S44.
It is determined whether or not 2 seconds have elapsed after the respective sound fields were set in S45 to S47, and if so, the sound fields are sequentially switched in S48 to S50. In the case of MOVIES, the sound field is SIMULATED at S48.
→ MINI THATER → LOGIC THEATER → SIMULATED… It switches in order, and in the case of SPORTS, the sound field is RI at S49.
NG SIDE → STADIUM → ARENA → RING SIDE… Sequentially switches, and in the case of MUSIC, the sound field is JAZZ CLU at S50.
B → SYMPHONY HALL → LOGIC HALL → JAZZ CLUB…. If 2 seconds have not elapsed in S45 to S47, the sound field mode currently set is held and S
Return to 31.

As a result, the user can move the MOVIES, SP
When either the ORTS or MUSIC category is selected, the sound field set for each is automatically switched every 2 seconds. Then, the user can select an optimum sound field by pressing an arbitrary key while feeling the optimum sound while listening to the simulated voice in each sound field mode. In the above-described embodiment, the sound fields are set to be switched every 2 seconds, but the switching time may be arbitrary, and the switching time can be easily changed only by changing the software of the microcomputer 2. is there. In addition, as a big category, MOVIES, S
An example in which three kinds of sound fields of PORTS and MUSIC and three kinds of sound fields for each category are set has been described, but it goes without saying that these can be arbitrarily changed and set.

[0015]

As described in detail above, when the sound field correction apparatus of the present invention selects a category with the category selection key, the sound field mode in the selected category is sequentially switched at predetermined time intervals, and the user Is configured to fix the sound field mode by a predetermined operation of the operation unit when it feels optimal while listening to the simulated sound in each sound field mode, so the optimum sound field can be set with extremely simple operation It has the feature.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of an embodiment of a sound field correction device of the present invention.

FIG. 2 is a flowchart showing a sound field mode selection operation in the sound field correction apparatus of the present invention.

FIG. 3 is a flowchart showing a sound field mode selecting operation in the conventional sound field correcting apparatus.

FIG. 4 is a diagram showing an example of category display of sound fields.

FIG. 5 is a diagram showing an example of a sound field mode.

FIG. 6 is a diagram for explaining a pulse response of a sound field.

[Explanation of symbols]

 1 DSP circuit (sound field simulation means) 2 Microcomputer (control means) 3 Operation part (operation means) 3a Category display key 3b Category selection key

Claims (2)

[Claims] 1. A sound field simulation means for simulating a plurality of sound fields, adding the same to an input voice signal and outputting the sound signal, and an operation for selecting a sound field mode simulated by the sound field simulation means. Means and control means for controlling the sound field simulation means in accordance with the operation of the operation means, wherein the control means sequentially switches the sound field mode at predetermined time intervals, and the operation means is operated. And a sound field correction device configured to fix the sound field mode. 2. A sound field simulation means for simulating a plurality of sound fields, adding the same to an input voice signal and outputting the sound signals, and a category display for displaying on-screen a category roughly dividing the plurality of sound fields. An operating unit including a key and a category selection key for selecting the category, and controlling the sound field simulation unit according to the operation of the operating unit, and turning on the category and the sound field mode for each category. And a control means for outputting various signals for screen display, wherein the control means, when the category selection key is input while the category is displayed on screen, the selected category The sound field mode is sequentially switched every predetermined time, and the sound is generated by a predetermined operation of the operation means. The sound field correction apparatus characterized by being configured to secure the mode.