JPH01114109A - Display device for acoustic equipment - Google Patents

Abstract

PURPOSE:To display a sense of rhythm of an acoustic signal by providing a level detection means detecting an acoustic signal level, a display pattern data storage means, a control means for data readout and a display means, etc., and switching a display pattern. CONSTITUTION:An output of a BPF group 23 in the rhythm display mode is inputted to a display control means 39 via an A/D converter group 44. The means 39 detects a level of an output filter of the group 23 by using a sampling pulse at a prescribed period outputted from a timing control means 36. To which range among three level ranges the detected level belongs is discriminated and the result is transferred to a storage control section 37 and a pattern data is read from a storage means 35. The data is transferred to a driver 32 via a control means 39 and an interface 42, etc., and displayed on a display section 31. Then it is displayed on the display section 31 in response to the level change of the filter in the group 23, the display pattern is switched sequentially to display the sense of rhythm of an acoustic signal.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a display device used in an audio device such as a radio receiver, a cassette deck, or a compact disc (CD) player, particularly a display device for displaying spectral characteristics, equalizer characteristics, etc. The present invention relates to a display device for an audio device including a display device.

2. Description of the Related Art Audio devices having dedicated display means for displaying spectral characteristics and equalizer characteristics have been known. Furthermore, there has been conventionally known an audio device equipped with a level display device in which a large number of light emitting elements are arranged in a line and the number of light emitting elements emit light in accordance with the audio signal level.

Problems to be Solved by the Invention However, the above conventional level display device using light emitting elements merely displays the level of an audio signal by the number of light emitting elements of the light emitting elements.

The present invention utilizes a display device that displays spectral characteristics, equalizer characteristics, etc., and provides a display device for an audio device that can display the rhythmic feel of an audio signal by switching display patterns.

Means for Solving the Problems In order to achieve the above object, the present invention provides a level detecting means for detecting an acoustic signal level, a storage means in which a plurality of display pattern data is stored, and a detection method using the level detecting means. The display device includes a control device that reads out display pattern data from the storage device in accordance with the level read out, and a display device that displays a display pattern based on the read out display pattern data.

Operation The present invention has the above-described configuration, in which the level detection means sequentially detects the sound signal level, sequentially reads display pattern data corresponding to the detected level from the storage means, and stores the read display pattern data. The display pattern is sequentially displayed on the display unit based on the following.

Embodiment FIG. 1 shows the front view of an in-vehicle audio device (integrated device of a radio receiver and a cassette deck) according to an embodiment of the present invention. In Fig. 1, 1 is the main body of the device, 2 is a power switch, 3 is a dust cover provided in the cassette insertion slot so that it can be opened and closed, 4 is an eject button for ejecting the cassette, and 5 is a button for selecting radio reception. tuner button,
6 is a manual selection button for manually selecting AM broadcasts and FM broadcasts, 7 is a seek button for automatic tuning buttons, 8 is a band switching button, and 9 is a preset memory for storing your favorite broadcast stations. Buttons 10 are volume adjustment buttons, 11 is a characteristic display section for displaying spectrum characteristics, equalizer characteristics, etc., and light emitting elements are arranged vertically and horizontally. 12 is an equalizer characteristic adjustment button. Two equalizer characteristic adjustment buttons 12 are provided for each frequency band, the upper button is used to increase the level, and the lower button is used to increase the level. Used when lowering. FIG. 5 shows an example in which equalizer characteristics are displayed on the characteristics display section 11. 1 "3 is a display section that displays the reception frequency, reception band, cassette deck operating status, etc., and 14 is a display switching button. When the display switching button 14 is pressed, the display section 11 displays the spectrum characteristics or the equalizer. The display is switched to characteristic display or rhythm display. 15 is an equalizer memory button for storing equalizer characteristics, and 16 is a volume memory button for storing the desired volume.

In FIG. 1, when the power switch 2 is turned on and the tuner button 5 is pressed, the radio receiving mode is set, and when a cassette is inserted into the cassette insertion slot, the cassette deck mode is set. In addition, in the cassette deck mode, the above operation button 6
．． 7.9 etc. can be used as an operation button for deck control.

For example, in the cassette deck mode, operation button 6 is used for fast forward (
This is the operation button for FF), fast rewind and REW).

FIG. 2 shows the configuration of the above embodiment. In Fig. 2, 20 is an electronic tuner, 21 is a cassette deck, 2
2 is an analog switch, and this analog switch 2
2 selects either the audio signal output from the electronic tuner 20 or the audio signal output from the cassette deck 21, and a control signal output from the cassette deck 21 when a cassette is inserted into the cassette deck 21. Accordingly, the analog switch 22 is switched to the cassette deck 21 side, and the analog switch 22 is switched to the electronic tuner 20 side by a control signal generated when a cassette is ejected from the cassette deck 21. 23 is a band pass filter group, and this band pass filter group 2
3 has a center frequency of 63Hz, 125H7, 250Hz,
500Hz.

1, KHz, 3. It consists of 5KHz and 10KHz bandpass filters f+-f. The outputs of the bandpass filters f1 to f2 are used for displaying spectral characteristics and rhythm. 24R, 24
L is a group of band-pass filters for the equalizer of the right channel and the left channel, respectively, and these band-pass filter groups 24R and 24L are each composed of a plurality of band-pass filters f + -f 7 having different center frequencies. 25R and 25L are the right channels, respectively.
This is an electronic volume group constituting a left channel equalizer, and these electronic volume groups 25R and 25L are composed of a plurality of electronic volumes VR+ to VR7 that adjust the output levels of the band pass filter groups 24R and 24L. 27F is in front of the right and left channels (Front
27R is an electronic volume for adjusting the level of the rear signals RR and RL of the right and left channels. 28F is a power amplifier that amplifies the front signals FR and FL, and 28R is a power amplifier that amplifies the rear signal RRXRL. The previous signal FR amplified by the power amplifier 28F,
FL is applied to speakers 29FR and 29FL placed on the left and right sides of the front side of the vehicle inside the vehicle, respectively, and signals RR and RL after being amplified by the power amplifier 28R are applied to speakers 29FR and 29FL placed on the left and right sides of the rear side of the vehicle interior. 29RR, 29RL
is applied to Reference numeral 30 denotes an operation section, and this operation section 30 includes various operation buttons 5.6.7.8.9.10 in FIG.
．． It consists of 12, 14, 15, 16, etc. 31 is a display section, and this display section 31 is similar to the display section 1 in FIG.
3 and a characteristic display section 11.

32 is a driver that drives the display section 31.

33 is the electronic tuner 20, cassette deck 21, electronic volume 25R, 25L, electronic volume 27F,
27R, a central processing unit (CP) that controls the driver 32.
U), and the functions of this CPU 33 will be explained below. 34 is a key processing means, and this key processing means 3
4 determines the operation button operated on the operation unit 30, changes or updates the data stored in the storage means 35, and sends the determination result to the timing control means 36. The timing control means 36 determines the timing of various operations according to the key discrimination result, and controls the storage control means 37, the device selection control means 38, the display control means 39, and the deck control means 40.
control. The storage control means 37 specifies an address for writing data into or reading data from the storage means 35. The storage means 35 stores the electronic tuner 2.
0, data for controlling the cassette deck 21, data for equalizer control (for controlling electronic volumes 25R and 25L), and data for controlling electronic volume 27.
Data for controlling the F127R, data for controlling the driver 32, display pattern data for rhythm display, etc. are stored, and the data read from the storage means 35 is sent to the display control means 39, the deck control means 40, and the serial interface. 41. The device selection control means 38 selects the devices (electronic tuner 20, equalizer electronic volume 25) to which data should be transferred from the CPU 33.
R, 25L, electronic volume 27F, 27R, driver 32). The data read from the storage means 35 is transmitted to the electronic tuner 20, the equalizer (electronic volume 25R125L), and the electronic volume 2 via the serial interface 41 and the interface 42.
Transferred to 7F, 27R, and driver 32.

Further, data for controlling the cassette deck is transferred to the cassette deck 21 via the deck control means 40. 43
4 is a timer for managing the time of the timing control means 36;
4 is an A/D conversion means for A/D converting the output of the band pass filter group 23, and the data for displaying the spectral characteristics converted by this A/D conversion means 44 is sent to the display control means 39 and the serial interface 41. , is transferred to the driver 32 via the interface 42.

3A, B, and C each show a state in which the display pattern data stored in the storage means 35 is read out and displayed on the characteristic display section 11 of the display section 31, and FIG. 3A shows a state where a person Figure 3B shows the dancer facing to the right.
Figure 3C shows the dancer facing forward.
It is shown dancing while facing to the left. In this embodiment, the display of FIGS. 3A, B, and C is switched in accordance with the rhythm of the acoustic signal.

FIG. 4 shows the operating principle of this embodiment. In FIG. 4, 0 indicates the bandpass filter group 23 in FIG.
It shows the output waveform of the 125 Hz bandpass filter f2 in , and Ll and L2 (Ll<L2) indicate predetermined levels, and the levels L1 and L2 define three level ranges (A and B in FIG. 4).

C). In the rhythm display mode, the second
The output of the bandpass filter group 23 in the figure is the A/D
The conversion means 44 converts the signal into a digital signal and inputs it to the display control means 39. The display control means 39 samples the output level of the band pass filter f2 using a sampling pulse of a predetermined period outputted from the timing control means 36, and performs level detection. It is determined to which range of the three level ranges (A, B, and C in FIG. 4) the detected level belongs, and the determination result is stored in the storage control means 3.
Transfer to 7. The storage control means 37 reads display pattern data shown in FIGS. 3A, B, and C from the storage means 35 according to the determination result.

In the example shown in FIG. 4, the detected level range is A,
B, C, C, B, A, A... Therefore, from the storage means 35, FIG.

Display pattern data corresponding to B, C, C, B, A, A, . . . are sequentially read out. This read display pattern data is transferred to the display control means 39, the serial interface 41, the interface 42, and the driver 32, and is displayed on the characteristic display section 11 of the display section 31 as the third
Diagrams A, B, C.

Display patterns of C, B, A, A, . . . are sequentially displayed. In other words, the display pattern displayed on the characteristic display section 11 is sequentially switched in accordance with the level change of the bandpass filter f2. A pattern that looks like dancing figures is displayed dynamically. Although the above embodiment uses a pattern in which people dance to the rhythm, patterns other than this may also be used.

Effects of the Invention The present invention has the above-described configuration, and has the advantage that a pattern matching the rhythm of the reproduced signal can be displayed on the display section that displays equalizer characteristics, spectrum characteristics, etc.

[Brief explanation of the drawing]

Fig. 1 is a front view of an audio device equipped with a display device according to an embodiment of the present invention, Fig. 2 is a block diagram of the device, and Fig. 3 A, B, and C are images displayed on the display section of the device. FIG. 4 is a diagram showing the operating principle of the device, and FIG. 5 is a diagram showing an example of the equalizer characteristics displayed on the display section of the device. 1... Device body, 2... Power switch, 3... Dust cover, 4... Eject button, 5... Tuner button, 6... Manual selection button, 7... Seek button , 8...
Band switching button, 9...Preset memory button, 10.
...Volume adjustment button, 11...Characteristics display section, 12...
Equalizer characteristic adjustment button, 13...display section, 14...
Display switching button, 15... Equalizer memory button, 16.
...Volume memory button, 20...Electronic tuner, 21...
・Cassette deck, 22...Analog switch, 23
...Band pass filter group, 24R, 24L...Band pass filter group, 25R, 25L...Electronic volume group, 27F, 27R...Electronic volume, 28F
, 28R...power amplifier, 29...speaker, 3
0...Operation unit, 31...Display unit, 32...Driver, 33...Central processing unit (CPU), 34...
- Key processing means, 35... Storage means, 36... Timing control means, 37... Storage control means, 38...
Device selection control means, 39...Display control means, 40
... deck control means, 41 ... serial interface, 42 ... interface, 43 ... timer, 44 ... A/D conversion means. Name of agent: Patent attorney Toshio Nakao and one other person Figure 1 Figure 3 (df) (rll) Figure 4 (Nf)

Claims (1)

[Claims] Level detection means for detecting an acoustic signal level; storage means for storing a plurality of display pattern data; and control means for reading display pattern data from the storage means in accordance with the acoustic signal level detected by the level detection means. and display means for displaying equalizer characteristics, spectrum characteristics, etc., and displaying a display pattern on the display means based on display pattern data read from the storage means by the control means. Display device for equipment.