JP2545768Y2 - Display of recording output selection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a display device for displaying a switching status of a recording output selection device for selecting an audio signal supplied as a recording source to an audio device having a recording function. .

(B) Conventional technology Many digital audio devices that handle audio signals such as recent CD players, DATs (digital audio tape recorders), and BS tuners (satellite broadcast receiving tuners) as digital signals use the audio signals. Is output in the form of an analog signal as well as a digital signal. Therefore, as an audio amplifier, an audio amplifier compatible with a digital signal capable of directly inputting a digital signal from the digital audio device has been commercialized, and such an audio amplifier is the same digital audio device. A desired output can be selected from a digital signal and an analog signal even if the signal is an audio signal from the apparatus.

By the way, audio amplifiers are, for example,
As shown in Japanese Patent Application Publication No. 19, a recording output selecting device for selecting an audio signal to supply an audio signal obtained from another audio device as a recording source to an audio device having a recording function such as a tape recorder is provided.

In the above-described digital signal compatible audio amplifier, three types of recording sources can be selected even if the audio signal is from the same digital audio device. That is, an audio signal output as an analog signal and an audio signal output as a digital signal and output as a digital signal as it is, and an audio signal output as a digital signal and converted to an analog signal by a DA converter built in an audio amplifier And can be selected.

By the way, a digital signal compatible audio amplifier usually has an operation knob for selecting an audio device that supplies an analog audio signal including an analog signal in a digital audio device, and a digital signal in the digital audio device. An operation knob for selecting an audio device for supplying an audio signal is provided separately on the operation panel, and the input audio signal can be selected by operating the operation knob. I have. That is, even if an audio signal is output as a digital signal and is an audio signal of a digital signal as it is, or an audio signal output as a digital signal and converted into an analog signal by a DA converter, the digital signal from the digital audio device is output. When an audio signal is selected, the same operation knob is operated.

(C) Problems to be Solved by the Invention By the way, when the audio signal of the digital signal output from the digital audio device is selected as the audio signal for emitting the sound from the speaker, the digital signal compatible audio Since the DA converter built into the amplifier is used, even if the audio amplifier can select the recording source independently of the audio signal to be emitted from the speaker, in that case,
An analog signal obtained by converting a digital audio signal output from a digital audio device other than the digital audio device outputting the audio signal by a DA converter cannot be selected as a recording source. For that reason,
In a digital signal compatible audio amplifier, it is necessary to display which audio signal is currently output as a recording source. In order to perform such a display, a display such as a light emitting diode or a fluorescent display tube may be used. However, there is a fear that recognition may be difficult depending on a display method.

The present invention provides a display device of an input switching device which has been made in view of the above points.

(D) Means for Solving the Problems The present invention provides a first display unit which is output as a digital signal from a digital audio device and displays that an audio signal of the digital signal is supplied as a recording source, A second display unit for displaying that the audio signal output as a digital signal from the digital audio device and converted to an analog signal by the DA converter is supplied as a recording source; and a digital audio signal from the digital audio device. It is provided in the operation knob operated when selecting.

(E) Function The present invention provides a digital audio signal which is output as a digital signal and is an audio signal of a digital signal as it is or an audio signal which is output as a digital signal and converted to an analog signal by a DA converter. Focusing on operating the same operation knob when selecting the digital signal audio signal from the device, and an audio signal for outputting the digital signal audio signal output from the digital audio device from the speaker In the state selected as
An audio signal of a digital signal output from a digital audio device other than the digital audio device is DA
Focusing on the fact that the analog signal converted by the converter cannot be selected as a recording source, by providing a first display unit on the operation knob corresponding to the digital audio device, the digital signal is output from the digital audio device as a digital signal, A signal indicating that the audio signal is being supplied as a recording source is displayed, and a second display section is provided on the operation knob so that the signal is output as a digital signal from the digital audio device. This indicates that the converted audio signal is supplied as a recording source.

(F) Embodiment FIG. 1 is a circuit diagram showing a recording output selection device according to the present invention. (1) is a first digital input terminal to which an audio signal of a digital signal reproduced by a CD player is supplied;
(2) is a second digital input terminal provided as a spare terminal for supplying a digital signal of a digital audio device which cannot output an audio signal as a digital signal and can not be connected to a predetermined connection point; A first selector for selecting an audio signal supplied to the first and second digital input terminals (1) and (2); (4)
Is a DA for recording audio signals as digital signals
A digital output terminal connected to a digital recording system circuit of T (not shown) and supplied with an audio signal selected by the first selector (3);
A third digital input terminal to which an audio signal of a digital signal reproduced by the DAT is supplied, (6) selects an audio signal supplied to the first selector (3) and the third digital input terminal (5). A second selector for
(7) is an input circuit for performing demodulation and signal processing of various digital signals selected by the second selector (6) so as to be matched with a circuit of the next stage, and (8) is an input circuit for inputting from the input circuit (7). A DA converter for converting the obtained digital signal into an analog signal, (9) a first analog input terminal to which an audio signal of the analog signal received by the tuner is supplied,
(10) a second analog input terminal to which an analog audio signal reproduced by a CD player which supplies a digital audio signal to the first digital input terminal (1); and (11) a predetermined connection. A third analog input terminal provided as a spare terminal for supplying an audio signal of an analog signal of an audio device that cannot be connected to the portion, and (12) an audio signal of a digital signal to the third digital input terminal (5). A fourth analog input terminal to which an audio signal of an analog signal reproduced by the supplied DAT is supplied. (13) is an audio signal output from the DA converter (8) and the first to fourth analog input terminals (9). ) To (12), a third selector for selecting an audio signal to be emitted from a speaker (not shown) from among the audio signals supplied to (12). (14) is a fourth selector for selecting an audio signal supplied to the DA converter (8) and the first to third analog input terminals (9) to (11), and (15) is an analog It is connected to a circuit (not shown) of the analog recording system of the DAT for recording the audio signal of the signal, and the audio signal selected by the fourth selector (14) is supplied via a switch (16). Analog output terminal.

In the circuit of FIG. 1, by switching the first and second selectors (3) and (6), a first digital input terminal (1), a second digital input terminal (2) or a third digital input terminal (5). Is supplied to the input circuit (7). Here, the digital signal input to the input circuit (7) is input to the input circuit (7).
And demodulated and signal-processed, and input to the DA converter (8). Therefore, the digital signal supplied from the DA converter (8) to one of the first, second and third digital input terminals (1), (2) and (5) is converted into an analog signal. A signal is output.

The audio signal output from the DA converter (8) is supplied to a third selector (13). The third
The selector (13) is supplied with audio signals from the first to fourth analog input terminals (9) to (12) in addition to the audio signal from the DA converter (8). ), The audio signal to be emitted from the speaker can be selected. By switching the third selector (13), the DA converter (8)
From the audio signal from the first and fourth to fourth analog input terminals (9) to (12), a sound corresponding to a desired audio signal can be emitted from the speaker.

Therefore, CD players input with digital signals,
An audio signal from a digital audio device and a DAT connected to the second digital input terminal (2), a tuner and a CD player input as analog signals, and an audio device and a DAT connected to the third analog input terminal (11) The sound to be emitted by the speaker can be freely selected from the audio signal from the speaker.

On the other hand, the audio signal output from the DA converter (8) is supplied to the fourth selector (14). The fourth
The selector (14) is supplied with audio signals from the first to third analog input terminals (9) to (11) in addition to the audio signal from the DA converter (8). The audio signal selected by the fourth selector (14) is supplied to the analog output terminal (1) via the switch (16) when the switch (16) is closed.
Supplied to 5). Therefore, when the switch (16) is closed, the audio signal from the DA converter (8) and the first to third analog input terminals (9) to (11) are switched by switching the fourth selector (14). A desired audio signal can be recorded by DAT as an analog signal from the audio signal from the DAT. However, the audio signal from the DA converter (8) is selected by the fourth selector (14) and supplied to the third digital input terminal (5) by the second selector (6).
When an audio signal from the DAT is selected, the switch (16) is set to an open state, so that the audio signal from the DAT is not input to the DAT.

Therefore, the audio signal from the digital audio device connected to the CD player and the second digital input terminal (2), which is input as a digital signal and converted to an analog signal by the DA converter (8), is input as an analog signal. An audio signal to be recorded as an analog signal by DAT can be freely selected from an audio signal from a tuner, a CD player, and an audio device connected to the third analog input terminal (11).

Also, the audio signal of the digital signal from the CD player or the digital audio device connected to the second digital input terminal (2) is not converted into an analog signal, but is converted to the digital output terminal (4) via the first selector (3). ), It is possible to record audio signals from the CD player and the digital audio device as digital signals by DAT.

At present, recording audio signals from CD players as digital signals is prohibited.
Since the digital recording circuit of the DAT does not support the digital signal from the CD player, the audio signal from the CD player cannot be recorded as a digital signal.

By the way, the first selector (3), the second selector (6), the third selector (13), the fourth selector (14)
The switches (16) are controlled by a control circuit (18) which operates according to the operation state of the key switch (17), as shown in FIG. The key switch (1
7) is configured to be switched by pressing operation knobs (21) to (27) (shown in FIG. 3) provided on the operation panel (28) so as to be displaceable in the front-rear direction. .
Therefore, the first selector (3), the second selector (6), the third selector (13), and the fourth selector are operated by pressing a desired one of the operation knobs (21) to (27). (14) and the switch (16) are switched, so that a sound corresponding to the desired audio signal can be emitted from the speaker, and the desired audio signal can be recorded by DAT.

Note that the first selector (3), the second selector (6),
The method of controlling the switching of the third selector (13), the fourth selector (14), and the switch (16) is not the gist of the present invention, and thus the detailed description is omitted.

On the other hand, when the key switch (17) is operated, control for switching the first selector (3), the second selector (6), the third selector (13), the fourth selector (14) and the switch (16) is performed. A signal is generated and a fluorescent display tube (FL tube) according to the operation state of the key switch (17)
FL display (19) and light emitting diode (LE
The LED display (20) composed of D) is driven. The FL tube display (19) displays an audio signal emitted from a speaker, and the LED display (20) displays a DAT signal.
The audio signal to be recorded is displayed.

By the way, as shown in FIG. 3, a part of the LED display (20) is formed with operation knobs (21) and (22) for operating the key switch (17). The operation knobs (21) and (22) and the operation knob (23) are operated when selecting an audio signal output as a digital signal,
Other operation knobs (24) to (27) are operated when selecting an audio signal output as an analog signal.

The operation knob (2) that forms part of the LED display (20)
To describe in detail 1) and (22), the operation knob (21) is a CD connected to the first digital input terminal (1).
The operation knob (22) is operated when selecting a digital signal from a digital audio device connected to the second digital input terminal (2). The operation knobs (21) and (22)
, First display portions (21a) and (22a) are formed on the upper left side to indicate that the digital signals are output as digital recording signals and that the digital audio signals are supplied to the DAT as recording sources. . The operation knobs (21) and (22) indicate that an audio signal output as a digital signal and converted to an analog signal by the DA converter (8) is supplied to the DAT as a recording source. Second display units (21b) and (22b)
Is formed on the upper right side. The first display section (21a)
And (22a) are each illuminated in green by being illuminated by a green LED, and the second display unit (21a)
Each of (b) and (22b) is configured to emit red light when irradiated by a red LED. And
The display states of the first display units (21a) and (22a) and the second display units (21b) and (22b) are controlled by a control circuit (18).

The first display sections (21a) and (22a) are configured to be displayed according to the selection state of the first selector (3). That is, when a pressing operation of the operation knob for switching the first selector (3) is performed, a green LED indicating a digital signal is turned on accordingly, and an audio signal of the digital signal supplied to the digital output terminal (4) is output. The first display portion formed on the operation knob of the audio device that supplies the signal lights up in green.

On the other hand, the second display sections (21b) and (22b) are configured to be displayed as shown in the flowchart of FIG.
That is, the fourth selector (14) is set to a state in which the audio signal output from the DA converter (8) is selected by pressing the operation knob, and the second selector (6) is set to an audio signal other than the output from the DAT. When a signal is selected, a red LED indicating an analog signal is turned on according to the selection state of the first selector (3). As a result, the digital signal is converted into an analog signal by the DA converter (8), and the second display portion formed on the operation knob of the audio device that supplies the audio signal supplied to the analog output terminal (15) lights in red. I do.

Further, the fourth selector (1
When 4) is set to a state in which an audio signal other than the output from the DA converter (8) is selected, the processing shifts to a control program for driving another display (not shown). Also, the fourth
Even if the audio signal output from the DA converter (8) is selected by the selector (14), the second selector (6)
If the audio signal output from the DAT is selected, none of the second display portions (21b) and (22b) of the operation knobs (21) and (22) are lit.

Therefore, the operation knob (21) is pressed, and the audio signal of the digital signal from the CD player supplied to the first digital input terminal (1) is supplied to the digital output terminal (4).
The first display section (21a) of the operation knob (21) lights up green or an audio signal of a digital signal from the CD player is converted into an analog signal by a DA converter (8). When the signal is converted into an audio signal and supplied to the analog output terminal (15), the second display section (21b) of the operation knob (21) lights red. Further, when the operation knob (22) is pressed and an audio signal of a digital signal from the digital audio device supplied to the second digital input terminal (2) is supplied to the digital output terminal (4), The operation knob (22)
The first display section (22a) lights green or the digital audio signal from the digital audio device is converted to an analog audio signal by the DA converter (8) and supplied to the analog output terminal (15). Then, the second display (22) of the operation knob (22)
b) lights up red.

(G) Effect of the Invention As described above, the present invention provides the first operation knob corresponding to the digital audio device among the operation knobs for performing the switching operation of the recording output selection device for selecting the recording source.
And the second display unit, the audio signal as a digital signal is supplied as a recording source, and the digital signal is built into the audio amplifier.
It can be easily confirmed that the audio signal converted to an analog signal by the DA converter is supplied as a recording source.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a recording output selection device according to the present invention,
FIG. 2 is a circuit diagram showing a control unit for controlling the circuit of FIG. 1,
FIG. 3 is a front view showing an operation knob according to an embodiment of the present invention, and FIG. 4 is a flowchart of a program for controlling lighting of the second display unit. Description of main figure numbers (3) (6) (13) (14) ... selector, (4) ...
Digital output terminal, (15) ... Analog output terminal, (2
1) (22) (23) (24) (25) (26) (27) ... Operation knob, (21a) (22a) ... First display, (21b) (22b) ...
... Second display unit.

Claims (1)

(57) [Scope of request for utility model registration] An audio signal provided to an audio device having a recording function as a recording source is selected.
In a recording output selection device capable of selecting an audio signal from a digital audio device capable of outputting an audio signal obtained by performing reproduction or the like as a digital signal, an audio signal of the digital signal from the digital audio device is converted into an analog audio signal. A digital converter, and an operation knob operated when selecting an audio signal of a digital signal from the digital audio device. The digital audio device outputs the digital signal as it is output as a digital signal from the digital audio device. A first display unit for displaying that a signal is supplied as a recording source; and an audio signal output as a digital signal from the digital audio device and converted to an analog signal by the DA converter is supplied as a recording source. A second display unit for displaying that the recording operation is being performed, provided on the operation knob.