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JPH04103300

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DESCRIPTION JPH04103300
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a
test tone switching device which allows a user to select an automatic switching mode and a
manual switching mode of a test tone. 2. Related Art In recent years, Dolby Pro Logic Surround
has been developed in which the cinema-like realism is obtained from the enhancement of video
software and the directionality is not impaired. In this calibration, left, center, right. It is
necessary to provide a test tone switching device which outputs signals from the four
loudspeakers placed respectively later and adjusts its size to be heard in the same order of
magnitude. FIG. 3 shows a block diagram of this conventional test tone switching device. In FIG.
3, 1 is a timer means for measuring the switching time of the test tone, 2 is a switch control
means for switching the switch by the overflow of the timer means 1, 3 is a test tone generating
means for generating a test tone signal, 4 is a test tone Switch means for switching the test tone
signal of the generating means 3 to each speaker, and 5 is a speaker. The operation of the
conventional test tone switching device configured as described above will be described below.
First, the timer means 1 measures a predetermined time, and when the time comes, the switch
control means 2 is notified. Switch control: A state to be changed next from the current switch
control state is determined, and a control signal is sent to the switch means 4. That is, each time
the timer unit 1 comes, the control unit 4 controls the switch unit 4 in order, for example, right
→ center → left → back → right. The test tone generation means 3 generates a test tone signal
and inputs it to the switch means 4. The switch means 4 switches the speaker 5 which outputs
the test tone signal by switching the switch according to the control signal from the switch
control means 2. SUMMARY OF THE INVENTION However, in the configuration as described
above, since the test tone switching is automatic, for example, it is not possible to continue
listening to only the center speaker, or the test tone from one speaker. There was a problem that
the time for which it was put out was always constant, and it was not possible to switch output
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speakers quickly or vice versa. In view of the foregoing, it is an object of the present invention to
provide a test tone switching device which allows a user to manually adjust a test tone.
SUMMARY OF THE INVENTION In order to solve the above problems, the test tone switching
device according to the present invention is provided with a test tone switching automatic /
manual switching switch and a speaker switching switch for switching the test tone output
speaker in the manual mode. Is provided with mode switching means.
Operation With the configuration described above, the automatic and manual selector switches
can be used as a manual, and the user can freely select a speaker that outputs a test tone by
operating a speaker selector switch for selecting an output speaker. Also, the switching speed of
the speaker can be freely switched. Embodiment An embodiment of the present invention will be
described with reference to the drawings. FIG. 1 shows a block diagram of a test tone switching
device in a first embodiment of the present invention. In FIG. 1, 11 is a timer means for
measuring the switching time of the test tone, 12 is a mode switching means, and a speaker for
switching the test tone output speaker in the manual mode and a changeover switch 12a for
switching automatic or manual test tone switching. A changeover switch 12b is provided.
Reference numeral 13 is switch control means, 14 is test tone generation means for generating a
test tone signal, 15 is switch means for switching the test tone signal of the test tone generation
means 14 to each speaker, and 16 is a speaker. The operation of the test tone switching device
configured as described above will be described below. First, when the automatic and manual
changeover switch 12a of the mode switching means 12 is automatic, the operation is the same
as in the prior art. Next, when the automatic and manual changeover switch 12a of the mode
switching means 12 is manual, the timer means 11 is cut off and does not affect the operation.
The mode switching means 12 sends a signal to the switch control means 13 every time the
speaker switching switch 12b is pressed in the manual mode. The switch control means 13
determines a state to be changed next from the current switch control state, and sends a control
signal to the switch means 14. That is, each time the speaker switching switch 12b of the mode
switching means 12 is pressed, the control of the switch means 15 is performed in order, for
example, right → center → left−10 rear → right. The test tone generating means 14 generates a
test tone signal and inputs it to the switch means 14. The switch means 15 switches the switches
16 for outputting the test tone signal by switching the switches in accordance with the
distribution signal from the switch control means 3. As described above, according to the present
embodiment, the user can freely select the output speaker by providing the automatic and
manual selector switches and the speaker selector switch which switches the speakers in order.
FIG. 2 shows a block diagram of a test tone switching device in a second embodiment of the
present invention, wherein 21 and 23 to 26 are the same as 11 and 13 to 26 in FIG.
22 is a mode switching means, which is a switch 22a for switching between test tone switching
automatically and manually, and four speaker switches 22b, 22c, and 24b for switching left,
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center, right, and rear output speakers of the test tone directly in the manual mode, respectively.
It has 22d and 22e. The operation of the test tone switching device configured as described
above will be described below. First, when the automatic and manual changeover switch 22a of
the mode switching means 22 is automatic, the operation is the same as in the prior art. Next,
when the automatic and manual changeover switch 22a of the mode switching means 22 is
manual, it is judged which of the speaker changeover switches 22b, 22c, 22d and 22e has been
pressed, and the switch control means 23 is directly switched. Send a signal to switch to notify.
The switch control means 23 recognizes that the mode is to switch the speakers directly, and
sends a control signal to the switch means 25. That is, the control of the means 25 is performed
on the current output speaker. The test tone generating means 24 generates a test tone signal
and inputs it to the switch means 25. The switch means 25 switches the speaker 26 which
outputs the test tone signal by switching the switch according to the control signal from the
switch control means 23. As described above, according to the present embodiment, the user can
freely select the output speaker by providing the speaker switching switch which can directly
switch the automatic and manual selector switches and the output speakers. In this embodiment,
the mode switching means is operated by the switch, but this may be performed by the remote
control signal. Effects of the Invention As described above, according to the present invention, by
providing mode switching means provided with automatic and manual switching of test tone
switching and a speaker switching switch for switching an output speaker, it is possible to
continue from one speaker. The test tone can be output continuously, and the switching speed of
the speaker can be made free, and its practical effect is great.
[0002]
Brief description of the drawings
[0003]
FIG. 1 is a block diagram of a test tone switching apparatus according to a first embodiment of
the present invention, FIG. 2 is a block diagram of a test tone switching apparatus according to a
second embodiment of the present invention, and FIG. It is a block diagram of a switching device.
11.21 · · · · · · · · timer means, 12. 22 · · · · · · · · mode switching means, 12a, 22a · · · · · · automatic
manual selector switch, 12b, 22b ~ 22e · · · music speaker selector switch 113.23 · · · · · · Switch
control means, 14. 24 · · · · · Test tone generation means, 15.25 · · · Switch means, 16 ° 26 · · · · · ·
· · · · ·.
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