JP2001067053A - Display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a feeling of unity between a display and a sound source (a tune), by detecting a fixed period or a sound (a tempo) continually arising at fixed time intervals from the sound source (the tune) of an audio input, and synchronizing displayed contents with the tempo of the sound source (the tune) to eliminate the regularity of the display. SOLUTION: This display device is equipped with a level detecting circuit 4 for dividing an audio signal band into a plurality of bands and taking out the level of each band, a tempo detecting circuit 6 for detecting a tempo from a sound source (a tune), and a display circuit 3 for displaying the levels of the respective bands with segments. The time for switching displayed levels to the next varied displayed levels is synchronized with the tempo by a system controller 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention detects a sound (hereinafter, referred to as a tempo) that continuously appears at a fixed period or a fixed time interval from a sound source (song) of an audio signal, and controls the display content. The present invention relates to a display device.

[0002]

2. Description of the Related Art FIG. 11 is a block diagram of a conventional spectrum analyzer (hereinafter referred to as a spectrum analyzer) display device.
In the figure, reference numeral 1 denotes an operation circuit, and 2 denotes a system controller (hereinafter, referred to as a controller) which receives button operation data from the operation circuit 1 and changes and outputs display data.
Reference numeral 3 denotes a display circuit that receives display data from the controller 2 and displays spectrum information. The controller 2 includes a control circuit 2a composed of a microcomputer operating according to a program, and a level RA for storing level data.
M2b, and a display ROM 2d storing each display data
Having. 4 is a level detection circuit for sending level data to the control circuit 2a, and 5 is an audio input.

FIG. 12 is a flowchart for explaining the operation of the above-structured spectrum display device. The operation will be described below with reference to this flowchart. In the figure, a level detection circuit 4 extracts an audio signal from an audio input 5 (S001), divides it into each band, and converts the input level into digital data (S002). Next, the converted digital data is added to the controller 2 and stored in the level RAM 2b through the control circuit 2a (S003).

[0004] Further, whether or not to switch the display content is selected by the operation circuit 1 (S004), and the control circuit 2a converts the display pattern called from the display ROM 2d and the level data stored in the level RAM 2b into display data ( S005), it is sent from the controller 2 to the display circuit 3
And display as shown in FIG. 13A (S6). When the display contents are switched by the operation circuit 1, FIG.
Is displayed. FIG. 13 is an example of a spectrum analyzer display.

FIG. 14 shows an example of character display. As shown in FIG. 14, character display is performed at a constant speed with respect to the melody score in FIG.
It is repeatedly displayed as i → a.

[0006]

In the conventional spectrum display described above, since the control circuit 2a performs regular processing at a constant speed, the display is monotonous and boring. Therefore, various types of display patterns must be provided, and if the user becomes tired, the operation circuit 1 must change the display pattern of the spectrum analyzer. Further, there is a problem that although the tempo varies depending on the sound source (song), there is no sense of unity between the tempo and the display, resulting in an extremely simple display.

[0007]

A display device according to the present invention divides an audio signal band into a plurality of bands and extracts an input level for each band, and a predetermined period or a predetermined period from a sound source (music). It has a tempo detection circuit that detects the tempo that appears continuously at time intervals, and a display circuit that displays the input level of each band by segment, so that the display contents of the input level of each band are synchronized with the tempo. is there.

Further, the display level for displaying the input level is switched, and the switching timing between one display level and the next display level is synchronized with the tempo.

The display device sequentially displays several predetermined display patterns, and synchronizes the switching timing of the display patterns with the tempo.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 FIG. 1 is a block diagram showing a display device according to Embodiment 1 of the present invention. In the drawing, reference numerals 1 to 5 are the same as those of the prior art shown in FIG. According to the present invention, a time RAM 2c for storing tempo data is provided in the controller 2, and a tempo detection circuit 6 for detecting the tempo from the audio input 5 through the level detection circuit 4 and transmitting the information data to the control circuit 2a is provided. I have.

FIG. 2 is an internal block diagram of the tempo detection circuit 6 of FIG. In the figure, 6a is a bandpass filter for extracting a band containing a rhythm instrument, 6b is a data control circuit for converting the audio signal into level data and comparing whether the past and present level data match, 6c is a level data RAM for storing level data
It is.

FIG. 3 is an operation flowchart of the display device according to the first embodiment. In the figure, the level detection circuit 4
Extracts an audio signal from the audio input 5 (S101), divides it into bands, and converts the input level into digital data (S102). On the other hand, the tempo detection circuit 6 converts the time interval per tempo into digital data (S10).
3). Next, the converted digital data is stored in the control circuit 2a.
Through the process, the level data is stored in the level RAM 2b, and the tempo data is stored in the time RAM 2c (S104).

Next, the control circuit 2a converts the display pattern called from the display ROM 2d and the level data stored in the level RAM 2b into display data (S105).
It is transferred from the controller 2 to the display circuit 3 and is displayed as shown at 1a in FIG. 6 (S106). Next, tempo data is called from the time RAM 2c (S107), and it is compared whether or not one tempo has ended (S108). If not, the level data in the level RAM 2b is lowered by one step (S109), and the process returns to S105 again. It is displayed as shown in 1b of FIG. Further, the level data is displayed one step at a time until the end of one tempo and displayed (1c in FIG. 6). When one tempo ends, it is compared whether the time interval per tempo in S107 is constant (S110). If the time interval is constant, the process returns to S105, and the next level is displayed thereafter (2a → 2b in FIG. 6). → 2c). If there is a change, the process ends, and S10
Start from one. FIG. 6 shows a rhythm count control spectrum display pattern 1.

FIG. 4 is a flowchart showing the operation of the tempo detection circuit 6, and FIG. In the figure, the input level data of each band is extracted from the level detection circuit 4 of FIG. 1 (S01), and the band of the rhythm instrument containing the tempo (the same sound that appears periodically) is extracted by the band filter 6a (S02). The data is converted by the data control circuit 6b and stored in the level data RAM 6c (S03). Next, the data stored in the past is called from the level data RAM 6c (S04), and it is compared whether the present and the past data match (S05). If they match, it is determined that they are at the same level, the time interval of the matching data is set (S06), and the data is converted into digital data and output (S07). If they do not match,
Returning to S01, the level data is extracted.

Embodiment 2 FIG. 7 is an operation flowchart for explaining the display of switching the spectrum in the apparatus shown in FIGS. In the figure, an audio signal is extracted from an audio input 5 (S201), and a time interval per tempo is converted into digital data by a tempo detection circuit 6 (S20).
2) Input to the controller 2. The converted input data is stored in the time RAM 2c through the control circuit 2a (S203). Next, the input level of the audio signal divided into each band is converted into digital data by the level detection circuit 4 (S204), and stored in the level RAM 2b through the control circuit 2 (S205), as described above. Display ROM 2d
8A and the level data stored in the level RAM 2b are converted into display data by the control circuit 2a (S206), transferred from the controller 2 to the display circuit 3 and displayed as shown in FIG. 8A (S207). ).

Next, tempo data is called from the time RAM 2c (S208), and the number of tempos is counted (S208).
209) Further, it is determined whether or not the determined number of tempos (hereinafter referred to as a phrase) is completed (S210). If not completed, the process returns to S204 to complete one phrase until FIG.
Display in the display pattern of. When one phrase ends,
The data of the display content different from the previous display is called from the display ROM 2d, and the display pattern is changed (S211).

Next, it is compared whether or not the time interval per tempo is constant. If the time interval is constant, the process returns to S204, and FIG.
Is displayed. Thereafter, each time one phrase is completed,
8c... And a display different from the previous display is performed.
If there is a change, the processing ends, and the processing is started from S201, and a display different from the previous display is performed. FIG. 8 shows a rhythm count control spectrum switching display pattern 2.

Embodiment 3 FIG. 9 is an operation flowchart illustrating character display in the apparatus shown in FIGS. In the figure, an audio signal is extracted from an audio input 5 (S301), and a time interval per tempo is converted into digital data by a tempo detection circuit 6 (S30).
2). Next, the converted tempo data is stored in the controller 2.
Is stored in the time RAM 2c through the control circuit 2a (S303). The display pattern called from the display ROM 2d is converted into display data (S304), which is transferred from the controller 2 to the display circuit 3 and displayed as shown in FIG. 10A (S305).

Next, the tempo data is called from the time RAM 2c (S306), and the control circuit 2a compares whether or not one tempo has ended (S307). If not, the process returns to S305 again to display the previous display (FIG. 10a). maintain. When one tempo ends, data of display contents different from the previous display is called from the display ROM 2d, and the display pattern is changed (S308).

Next, the control circuit 2a compares whether the time interval per tempo is constant, and if it is, returns to S304 and displays the next character pattern (FIG. 10b). If there is a change, the process ends, the process starts from S301, and a display (FIG. 10B) different from the previous display (FIG. 10A) is performed. After that, every time one tempo ends, FIG.
・ Display is performed as l → a. FIG. 10 shows a rhythm count control character display pattern 3.

[0021]

As described above, according to the present invention, since there is no regularity in the content of the spectrum display pattern, the display is not tired and the sense of unity with the audio signal (music) is improved visually.

In addition, the pattern contents can be multifunctional, and the smoothness of the character display pattern can be improved.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a display device according to Embodiment 1 of the present invention.

FIG. 2 is a block diagram illustrating a tempo detection circuit according to the first embodiment;

FIG. 3 is a flowchart showing a rhythm count control spectrum display operation in the first embodiment.

FIG. 4 is a flowchart illustrating an operation of the tempo detection circuit according to the first embodiment;

FIG. 5 is a diagram illustrating the operation of the tempo detection circuit according to the first embodiment.

FIG. 6 is a diagram showing a rhythm count control spectrum display pattern 1 according to the present invention.

FIG. 7 is a flowchart showing a rhythm count control spectrum switching display operation according to the present invention.

FIG. 8 is a diagram showing a rhythm count control spectrum switching display pattern 2 according to the present invention.

FIG. 9 is a flowchart showing a rhythm count control character display operation according to the present invention.

FIG. 10 is a diagram showing a rhythm count control character display pattern 3 according to the present invention.

FIG. 11 is a block diagram showing a conventional spectrum display device.

FIG. 12 is a flowchart showing the operation of a conventional spectrum display device.

FIG. 13 is a diagram showing a conventional spectrum display pattern.

FIG. 14 is a diagram showing a conventional character display pattern.

[Explanation of symbols]

1 operation circuit, 2 system controller, 2a control circuit, 2b
Level RAM, 2c Time RAM, 2
d display ROM, 3 display circuits,
4 level detection circuit, 5 audio input,
6 tempo detection circuit, 6a bandpass filter,
6b data control circuit, 6c level data R
AM.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (reference) G10G 1/00 G10G 1/00 // H03G 1/00 H03G 1/00 BF term (reference) 2F041 JA02 JA09 JC03 5C080 BB01 CC01 DD01 DD21 EE02 EE13 JJ01 JJ02 JJ07 KK43 5C082 AA21 AA31 BA12 BA16 BB32 CB01 DA87 MM05 5D082 AA06 AA18 5J100 AA00 BC06 CA30 CA31 DA06 EA02 GA13

Claims (3)

[Claims] 1. A level detection circuit for dividing an audio signal band into a plurality of parts and extracting an input level for each band, and a tempo for detecting a tempo continuously appearing from a sound source (song) at a predetermined cycle or a predetermined time interval. A display device comprising: a detection circuit; and a display circuit for displaying an input level of each band by a segment, wherein display contents of the input level of each band are synchronized with a tempo. 2. The display device according to claim 1, wherein a display level for displaying an input level is switched, and a switching timing between a certain display level and the next display level is synchronized with a tempo. 3. The display device according to claim 1, wherein the display device sequentially displays several predetermined display patterns, and the switching timing of the display patterns is synchronized with the tempo. .