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BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
audio signal transmitting microphone device suitable for use in an audio communication
conference using an image screen such as a television screen. [Prior Art] FIG. 5 is an explanatory
view showing a conventional general image conference apparatus used when conducting an
audio communication conference using an image screen together. In the figure, A1 to A6 are
conference participants, M1 to M6 are microphones arranged according to the respective
conference participants A1 to A6, TV1 to 2 are image devices (built in speakers), and U is a main
device. It is assumed that the other end of the call is also configured by the same image
conference device. In such a configuration, the conference participant who is the call partner will
be displayed on the image devices TV1 and TV2. In this state, in order to identify the speaker of
the conference partner on the screen of the image device TV1-2, it is necessary to use the sound
heard from the speaker or to be careful about the movement of the mouth. For voice
identification, it takes time to get used to a certain degree in order to match voice and person,
and it is necessary to always search for a person on the screen to carefully identify and identify
the movement of the mouth, It has the disadvantage of increased fatigue. The above is explained
again with different expressions. That is, when a voice communication conference is performed
by connecting remote places via a communication line, a better sense of reality can be obtained
by using a video screen in combination, but such a video communication conference requires a
plurality of people. In many cases, the method of screen display is configured such that one
screen displays 2 to 4 persons or 2 to 4 persons each on the top and bottom of the screen, and a
plurality of these are displayed in parallel. . In this case, when the image of the conference
participant is smaller than the size of the display screen, it usually takes a certain amount of time
to determine who is speaking on the screen. On the other hand, also in moving picture
communication in recent years, a method of compressing a band and transmitting an image
signal has been adopted, and the screen is dropped and it is difficult to visually recognize facial
expressions and mouth movements. If you are not familiar with the participants, there is a
problem that voice alone can not identify the speaker on the screen. However, in the prior art,
there can not be found an image conference apparatus having a display mechanism for
visualizing the speaker on the screen in the microphone apparatus. [Problems to be Solved by the
Invention] In the present invention, therefore, it is a problem to be solved that it is possible to
immediately determine who is the speaker on the screen in an image communication conference
or the like.
Accordingly, the present invention aims to provide a microphone device that enables such.
[Means for Solving the Problems and Actions] The present invention arranges a microphone for a
conference participant, and the display mechanism of the microphone device when the speech
level of the speaker exceeds a certain threshold. The most important feature is the ability to
operate and identify the speaker instantly by this. The present invention will now be described in
detail with reference to the drawings. FIG. 1 is an explanatory view showing an embodiment of
the present invention. In the figure, reference numeral 10 denotes a microphone, 11 denotes a
microphone support, 15.16 denotes a microphone output, and 20.21 denotes a display using a
light emitting diode or the like. FIG. 2 is a characteristic diagram showing the relationship
between the display operation of the display 20. 21 and the sound level inputted to the
microphone 10. PTH in the drawing represents a threshold level. 3 and 4 are characteristic
diagrams showing the relationship between the sound level input to the microphone 10 and the
output level of the electric signal from the microphone, respectively. First, the case where the
microphone device of FIG. 1 has the characteristics of FIG. 2 and FIG. 3 will be described. Now, it
is assumed that the sound input level to the microphone 10 starts from zero and exceeds the
threshold value PTH. At this time, since the displays 20 and 21 (or only one of them) have the
characteristics shown in FIG. 2, they change from the non-operating state (OFF) to the operating
state a (ON) such as light emission. . The display 20 at this time may be determined by selecting a
color, a shape, and a place that can be recognized as if it were at first glance when displayed on
the video screen. This is determined in relation to the arrangement of the TV camera, the
speaker, the microphone device, etc., and the lighting. On the other hand, since the electric signal
output level from the microphone has the characteristic shown in FIG. 3, it is zero when the
sound input level is less than the threshold P eye, and the sound input level when it is 1 or more.
An electrical signal proportional to is output. The characteristic when the microphone device of
the present invention has the characteristic of FIG. 3 is that the outputs of a plurality of
microphones as shown in FIG. 5 are introduced into the main device and mixed into 1-2
channels. When it is output to the other party, a clear audio signal can be transmitted because an
acoustic input level of prH or less such as room noise is not sent to the other party. Next, when
the microphone device has the characteristic of FIG. 4 which outputs an electric signal in
proportion to the magnitude of the acoustic input level, the width of the main device U shown in
FIG. 5 has the characteristic of FIG. You may put a circuit.
In this case, the function to be shared by the microphone device according to the present
invention may be only a function in which the display 20 or 21 is turned ON when there is an
input of an acoustic level equal to or higher than a threshold. That is, some existing conference
apparatuses have the main apparatus U shown in FIG. 5 having the characteristics as shown in
FIG. Therefore, for such a conference apparatus, the acoustic input-to-electric output
characteristic of the microphone apparatus has the characteristic shown in FIG. 4, and the
operation of the display 20.21 has the characteristic shown in FIG. It is economically
advantageous to use one. [Effects of the Invention] As described above, according to the present
invention, by providing the display function to the microphone device, it is possible to instantly
identify the speaker on the screen, not only in the moving image but also in the quasi-moving
image communication conference. it can. Furthermore, when the electric signal output from the
microphone device has an acoustic input level equal to or lower than the threshold value, good
call performance is ensured by selecting one of the configuration that does not output the
electric signal and the configuration that outputs it. However, there is an advantage that the
function sharing with the main device can be realized efficiently and economically.
Brief description of the drawings
FIG. 1 is an explanatory view showing an embodiment of the present invention, FIG. 2 is a
characteristic diagram showing the relationship between the display operation of the display in
FIG. 1 and the input sound level, and FIGS. FIG. 5 is a characteristic diagram showing a
relationship between an input sound level to a microphone in FIG. 1 and an output level of an
electric signal from the microphone, and FIG. 5 is a layout diagram showing a conventional
general image conference apparatus.
Description of symbols 10: microphone, 11: microphone support, 15.16: output cape, 20.21:
display, P? I · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · Mr. X2
figure self-powered phone bell 3 figure 4 figure symphony input bell
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description, jps62217800
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