JPH04359300A - Spectrum analyzer displaying device - Google Patents

Abstract

PURPOSE:To provide a spectrum analyzer which makes no change in its displaying condition and gives no sense of incompatibility to the person who is looking at the display even if the cause of an abnormal sound is detected. CONSTITUTION:In an audio device 1, which has a spectrum analyzer display device 6, the digital signals, which are obtained through the conversion of input voice signals done by an analog/digital converter 2, are processed by an arithmetic processing means 3, a result of the processing is transferred to a voice output means 5 which outputs the voice. When a prescribed frequency band of the output level is displayed on the display mentioned above for every frequency band, a condition, in which an abnormal sound is generated, is detected, a mute signal from the arithmetic means 3 is generated and simultaneously the display function of the display device 6 is stopped during the period in which the mute signal is being generated.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a spectrum analyzer display device, and more particularly to a spectrum analyzer display device that stops the display function of the display device due to the occurrence of an abnormal sound such as a popping sound.

0002

2. Description of the Related Art Conventionally, as shown in FIG. 2, audio equipment 1, such as radios, televisions, cassette tapes, CD players, etc., convert analog audio information into digital information by converting analog audio information into digital information using an appropriate analog/digital converter 2. and convert the digital data into appropriate arithmetic processing means 3.
A digital sound is formed by the digital sound, and the output thereof is inputted to the sound output means 5 via a suitable amplification means 4 to reproduce the sound.

At the same time, the output level of the arithmetic processing means 3 is used to calculate the output level at a plurality of predetermined band frequencies regarding the currently reproduced audio, and the results are displayed on the spectrum analyzer display. 6 is displayed. To explain more specifically, when the audio device 1 is powered on, the audio input from the audio device 1 is
When converting with the analog/digital converter 2, the L channel (Lch) and the R channel (Rch) of the sound source are added and inputted to the analog/digital converter 2, and the digital output value is taken into the arithmetic processing means 3, The arithmetic processing means 3 samples the input data several times, takes the average, and outputs it to the audio output means and the spectrum analyzer display.

[0004] However, in such a system, for example, when changing the mode of the audio equipment, turning the power switch ON/OFF, or changing the tape or CD, a so-called popping sound may be heard. A sound called abnormal sound is generated. Therefore, if such rejected sound is directly converted into digital audio and played back, it will be perceived as an abnormal sound, so a mute signal is normally generated to prohibit the output of the audio.

[0005] Since the causes of the occurrence of such a drop sound have been roughly analyzed, if the cause of the occurrence of such a drop sound is stored in the arithmetic processing means 3 in advance, when the cause of the occurrence of such a drop sound appears, to immediately mute and stop audio output at that point. On the other hand, when such a drop sound is digitally converted and displayed on the spectrum analyzer display from the arithmetic processing means 3, the display changes rapidly and flickers, which also causes a sense of discomfort to the viewer.

[0006]

[Problems to be Solved by the Invention] An object of the present invention is to improve the conventional drawbacks, so that even when the cause of the pop sound is detected, there is no change in the display state, and the viewer does not feel any discomfort. The present invention provides a spectrum analyzer display device of various types.

[0007]

[Means for Solving the Problems] In order to achieve the above-mentioned object, the present invention employs the technical configuration as described below. That is, it is a spectrum analyzer display used in audio equipment, in which a digital signal obtained by converting input audio with an analog/digital converter is processed by arithmetic processing means, and the result is output to audio output means 1.
to output the sound, and when displaying the output level of a predetermined band frequency for each band frequency on the display, detecting a state in which a drop sound is generated, and generating a mute signal from the calculation means. At the same time, this is a spectrum analyzer display that stops the display function of the display while the mute signal is being generated.

[0008]

[Operation] Since the spectrum analyzer display device according to the present invention has the above-described configuration, when various operations that cause a drop sound are performed, the state is detected by an appropriate detection means. is detected and generates a mute signal, thereby stopping the display function of the spectrum analyzer display, so that the output level is not displayed on the display while the mute signal is present. be.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Specific examples of the spectrum analyzer display according to the present invention will be explained in detail below with reference to the drawings. FIG. 1 shows a specific example of a spectrum analyzer display that is combined with an audio device according to the present invention. In FIG. 1, an audio device 1 such as a radio, television, cassette tape, CD player, etc. converts analog audio information from the audio device into digital information by an appropriate analog/digital converter 2, and converts the digital data as appropriate. A digital sound is formed by the arithmetic processing means 3, and the output thereof is input to the sound output means 5 via a suitable amplification means 4 to reproduce the sound.

At the same time, the output of the arithmetic processing means 3 is used to calculate the output level at a plurality of predetermined band frequencies regarding the currently reproduced audio, and the results are displayed on the spectrum analyzer display. 6 is displayed. As described above, in the audio device 1, when a dropout sound is generated, a mute signal is generated to prohibit output of the sound. In the present invention, the mute signal is further input to the spectrum analyzer display 6 to temporarily stop the display function of the spectrum analyzer display.

[0011] The mute signal generating means is generally provided inside the arithmetic processing means 3, and its configuration employs the same means as the mute signal generating means in the prior art described above. It may be something that you do. Further, it is preferable that the mute signal generating means analyzes the cause of the dropout sound in advance and stores the information in an appropriate storage means within the arithmetic processing means 3. Furthermore, the mute signal generating means must be capable of immediately stopping the generation of the mute signal and restoring the display function of the spectrum analyzer display when the cause of the popping sound is eliminated. be. FIG. 3 is a flowchart showing the procedure for operating the spectrum analyzer display according to the present invention.

First, in step a, it is determined whether the power is on or off in a system in which the audio equipment and the spectrum analyzer display are combined. Here, if the power is not ON, the flowchart will be END, but if the power is not ON, the flowchart will be END.
If N, the process proceeds to step b, where it is determined whether a mute signal is being generated.

If the mute signal is not generated, proceed to step c and convert the audio input signal to an analog/analog signal.
The converted digital data is converted by a digital converter, processed by the arithmetic processing means 3, and in step d is outputted to the audio output means 5 and also displayed on the spectrum analyzer display 6. However, if a mute signal is generated in step b, a program for stopping the display function of the spectrum analyzer display is executed in step e, and then it is determined in step f whether the mute signal has been turned OFF. If the mute signal is continued, the process returns to step b and the same operation is continued.

On the other hand, in step f, the mute signal is turned off.
If it is determined that this has occurred, the process returns to step c and the subsequent steps are executed. Finally, in step g, it is determined again whether the power is ON or OFF, and if it is OFF, the flowchart ends at that point, but if the power is ON, the process returns to step a. Repeat the following steps.

Another specific example of the spectrum analyzer display according to the present invention will be explained. In a system in which an audio device and a spectrum analyzer display according to the present invention are combined, the audio device alone can
In some cases, the radio, television, cassette tape, CD player, etc. mentioned above are built-in,
In some cases, a television, cassette tape, CD player, etc. may be individually connected as an external audio generating device (AUX). In this case, there is a problem in that every time the external audio generating device (AUX side) is operated, a clicking sound is generated.

Therefore, in this embodiment, even when the external audio generating device 7 is connected, in order to obtain the same effect as described above, the external audio generating device is also usually provided with a mute signal generating means. By paying attention to the fact that the external audio generating device is operated, a circuit configuration is adopted that generates a mute signal when the external audio generating device is operated, and the muting signal generated from the external audio generating device is used as a display prohibition signal. The information is input to the arithmetic processing means 3, and based on the information, the display function of the spectrum analyzer display is stopped. Therefore, the operation flowchart in the system is the same as that in FIG.

[0017]

[Effects of the Invention] Since the above-described configuration is adopted in the present invention, even if the cause of the pop-off sound is detected, there is no change in the display state, and the viewer does not feel any discomfort. It is possible to provide a spectrum analyzer display device.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a specific example of an audio equipment system using a spectrum analyzer display according to the present invention.

FIG. 2 is a diagram illustrating an example of a system that combines conventional audio equipment and a spectrum analyzer display.

FIG. 3 is a flowchart showing the operating procedure of the spectrum analyzer display according to the present invention.

[Explanation of symbols]

1...Audio equipment 2...Analog/digital converter 3... Arithmetic processing means 4...Amplification means 5...Audio output means 6...Spectrum analyzer display

Claims (2)

[Claims] Claim 1: A spectrum analyzer display used in audio equipment, which processes a digital signal obtained by converting input audio with an analog/digital converter using an arithmetic processing means, and outputs the result to an audio output means. When transmitting and outputting sound and displaying the output level of a predetermined band frequency for each band frequency on the display, the function of the sound output means is activated from the calculation means upon detecting a state in which a drop sound is generated. A spectrum analyzer display device characterized in that a mute signal to be stopped is generated and at the same time the display function of the display device is stopped during a period in which the mute signal is generated. Claim 2: The audio device is connected to an external sound generating device, and the external sound generating device has means for detecting the occurrence of a drop sound and generating a mute signal. 4. The spectrum according to claim 1, wherein the mute signal generated by the external audio generating device is input to the arithmetic processing means to stop the display function of the display means. Analyzer display.