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JPH11289594

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This translation is machine-generated. It cannot be guaranteed that it is intelligible, accurate,
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DESCRIPTION JPH11289594
[0001]
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an
amplification apparatus in which an analog signal such as an audio video amplifier and a digital
signal are connected together.
[0002]
2. Description of the Related Art A conventional amplifier such as an AV amplifier is provided
with a plurality of analog input terminals and a plurality of digital input terminals. When signals
from other playback devices are connected to these multiple input terminals provided on the
back of the amplifier etc. by connecting cords, both analog input terminals and digital input
terminals are selected for each input function (source name) It was necessary to connect to the
selected input terminal and to check whether it was connected as indicated on the input terminal
by listening to the output signal, etc.
[0003]
Conventionally, when an analog input signal and a digital input signal are both supplied to an AV
amplifier or the like, the connection cord must be connected to a predetermined input terminal
provided on the back of the device or the like. In addition, the connection was very time
consuming and inconvenient.
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[0004]
SUMMARY OF THE INVENTION The present invention relates to an amplifying device such as an
audio video amplifier, which comprises an input terminal for inputting an analog signal, a
plurality of input terminals for inputting a digital signal, and a digital signal inputted to the input
terminal. A digital selector for selecting a signal, a DA conversion circuit for DA converting the
digital signal selected by the digital selector, a signal converted into an analog signal by the DA
conversion circuit, and an input supplied from the input terminal of the analog signal The
selector for selecting a signal, comparing means for comparing the analog signal selected by the
selector with the signal converted into an analog signal by the DA conversion circuit, and the
digital selector when the same signal is determined by the comparing means Storage means for
storing controlled control signals, either analog input signals or digital input signals A control
means for controlling the digital selector with the specified input signal specifying means and the
stored control signal to the memory means for switching the specified signal is an amplification
device comprising.
[0005]
Further, according to the present invention, in an amplifier such as an audio video amplifier, a
plurality of input terminals for inputting digital signals, an input terminal for inputting analog
signals, and a digital selector for selecting digital signals inputted to the input terminals A DA
conversion circuit that converts a digital signal selected by the digital selector into an analog
signal by a DA conversion circuit; a selector that selects an analog signal input to the input
terminal and an analog signal converted by the DA conversion circuit; An AD conversion circuit
for AD converting the analog signal selected by the selector; comparing means for comparing the
signal converted to a digital signal by the AD conversion circuit with the signal selected by the
digital selector; and the comparing means A memory means for storing a control signal
controlled by the digital selector when it is determined that the signal is the same. When the
control means for controlling the digital selectors in stored control signal to said storage means,
an amplification device comprising.
[0006]
Further, according to the present invention, in an amplifier such as an audio video amplifier, a
plurality of input terminals for inputting digital signals, an input terminal for inputting analog
signals, and a digital selector for selecting digital signals inputted to the input terminals A DA
conversion circuit that converts a digital signal selected by the digital selector into an analog
signal by a DA conversion circuit; a selector that selects an analog signal input to the input
terminal and an analog signal converted by the DA conversion circuit; An AD conversion circuit
for AD converting the analog signal selected by the selector; comparing means for comparing the
signal converted to a digital signal by the AD conversion circuit with the signal selected by the
digital selector; and the comparing means A memory means for storing a control signal
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controlled by the digital selector when it is determined that the signal is the same. And an input
signal designation unit that designates either an analog input signal or a digital input signal and
switches to a designated signal, and a control unit that controls the digital selector with a control
signal stored in the storage unit. It is.
[0007]
Further, according to the present invention, in an amplifying apparatus such as an audio video
amplifier, a plurality of input terminals for inputting digital signals, a plurality of input terminals
for inputting analog signals, and a digital for selecting digital signals inputted to the input
terminals. A selector, a DA converter circuit for converting a digital signal selected by the digital
selector into an analog signal by a DA converter circuit, an analog signal input to the input
terminal and an analog signal converted by the DA converter circuit are selected A selector,
display means for displaying the signal source selected and output by the selector, an AD
conversion circuit for AD converting the analog signal selected by the selector, the signal
converted into a digital signal by the AD conversion circuit, and A comparison means for
comparing the signals selected by the digital selector and a comparison means for judging the
same signal Storage means for storing the control signal controlled by the digital selector, input
signal specifying means for specifying either the analog input signal or the digital input signal
and switching to the specified signal, and control stored in the storage means According to
another aspect of the present invention, there is provided an amplification device comprising
control means for controlling the digital selector by a signal.
[0008]
DESCRIPTION OF THE PREFERRED EMBODIMENTS The preferred embodiments of the
amplification apparatus of the present invention will be described with reference to the drawings.
FIG. 1 is a block diagram showing an embodiment of the amplification apparatus of the present
invention.
FIG. 3 is a block diagram for explaining the comparison circuit.
[0009]
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The amplification apparatus according to the present embodiment includes a plurality of analog
signal and digital signal outputs obtained by reproducing a compact disc (CD), a mini disc (MD), a
digital video disc (DVD) or the like. An input terminal is provided.
An input terminal 1 for analog signals to which a plurality of analog signals are input, and a
digital to which a plurality of digital signals are input An input terminal 8 for signals is provided.
[0010]
The amplification apparatus according to the present embodiment eliminates the designation
display of the function (type of signal source) of the input terminal 8 among the input terminal 1
for analog signals and the input terminal 8 for digital signals provided on the back, side, front,
etc. Therefore, when the user connects a signal reproduced by another AV device or the like, at
least the digital signal is connected to either the connection terminal or the input terminal 8 by
the optical cable, and the input function (input terminal (input terminal The connection is
simplified so that the connection can be made without being aware of the name of the connected
signal source, etc., and there is no risk of misconnection.
[0011]
The amplification device of this embodiment shown in FIG. 1 is provided with an input terminal 1
for an analog signal having a plurality of input terminals 1a to 1n to which an analog signal is
inputted.
The signal input to the input terminal 1 is input to the selector 3 via the analog buffer amplifier 2
respectively.
A digital signal input to the input terminal 8 having a plurality of input terminals 8a to 8m is
input to the DA conversion circuit 10 via the digital selector 9 which is controlled to be switched
by the microcomputer 6 (hereinafter referred to as a microcomputer) The obtained analog signal
is supplied to the selector 3 and is also input to the microcomputer 6 as the comparison signal b.
[0012]
Although not shown, when the function is designated by the key operation of the operation unit,
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the microcomputer 6 controls the selector 3 to select from a plurality of analog signals and an
analog signal obtained by DA conversion of a digital input signal, and A signal is output to 4 and
a comparison signal a is input to the microcomputer 6.
[0013]
The amplifier 4 has amplifiers of a plurality of channels (not shown) for surround reproduction,
and signals of the respective channels are output from the output terminal 5 and the like.
The connection operation when connecting from another audio video reproducing apparatus or
the like to the input terminal through a connection line will be described with reference to the
flowchart shown in FIG.
[0014]
An analog signal and a digital signal are simultaneously reproduced, and the input analog signal
is connected to an input terminal, for example, 1a at a predetermined function position of the
input terminal 1.
The microcomputer 6 controls the selector 3 to select a signal according to the function display
of the input terminal 1 of the analog signal, and the connected analog signal is output from the
output terminal 5 through the amplifier 4 and connected to the output terminal 5 Sound is
emitted from the speaker, the signal is confirmed, and the setting of the connection to the
function-displayed input terminal of the analog input terminal is made (S1).
[0015]
When the digital signal of the same source is connected to the digital signal input terminal 8, for
example, 8b, the microcomputer 6 selects the digital selector 9, and the analog signal b obtained
through the DA conversion circuit 10 and the selector 3 The selected signal a is taken into the
microcomputer 6 and the reproduced signal of a specified fixed interval is stored in the storage
unit 7 (S3), and the change in the signal is compared to see if the stored signal is from the same
source. It judges (S4). In this case, when it is determined that the signals input to the input
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terminal 8a are not the same signal, the microcomputer 6 controls the digital selector 9, selects
the next digital signal, and the last of the digital signal input terminals 8a to 8m. The signals are
sequentially selected (S5), and it is determined whether they are the same signal (S4). Data for
controlling the digital selector 9 and selecting the input terminals 8a to 8m are stored in the
memory in the microcomputer 6 or in the storage device 7. The microcomputer 6 reads the
stored data and controls the digital selector 9. .
[0016]
When the microcomputer 6 sends a control signal to the digital selector 9 at S2 to control the
digital selector, selects the input terminal 8 in order, and selects the input terminal 8b at S4. The
control signal that controls the digital selector 9 is stored in the storage device 7 together with
the function name of the analog input signal. At this time, in order to select an input signal, an
analog signal is input, or a digital signal is input, or it is specified by an operation by the
operation unit, setting is made to output any input signal, and a digital input signal is set. At this
time, the microcomputer 6 stores the signal in the storage unit 7 and outputs a signal based on a
digital input signal selected by the selector 3 and the digital selector 9 to the amplifier 4 in place
of the analog signal.
[0017]
In S5, the input signals b up to the final input terminal 8m are compared, and when the
corresponding signal is not detected, the determination operation is ended.
[0018]
In the embodiment shown in FIG. 1, the microcomputer 6 performs DA conversion on the input
signal a of the analog signal and the input signal b of the digital signal by the DA conversion
circuit 10, stores it in the storage device 7 for a certain period, and stores the stored data. Read
out and compare signal changes to determine differences.
The determination operation based on digital signals of another embodiment of the amplification
apparatus of the present invention shown in FIG. 2 will be described. 1, the analog signals a and
b are connected to the DA input of the microcomputer 6, AD converted to digital data by the
signal processing circuit in the microcomputer, and stored in the memory circuit 7, thereby
eliminating the influence of time delay, Data of a certain section was extracted, and it was judged
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by comparing whether the change of the signal was the same. On the other hand, in another
embodiment of the amplifying apparatus according to the present invention shown in FIG. 2, the
output signal selected by the selector 3 is converted to a digital signal through the AD conversion
circuit 10 ′ and the digital signal a ′ is compared Data is input to the microcomputer 6 as data,
and the microcomputer 6 stores the input data in the storage device 7 as comparison data.
[0019]
The microcomputer 6 controls the digital selector 9 to select the digital signal inputted to the
input terminal 8 and takes in the digital signal b 'as comparison data into the microcomputer 6
and stores it in the storage device 7 as comparison data, and then the storage device The
comparison data is read from 7 and it is determined whether the data changes in the same level
by controlling the time difference, and if it is not the same data, the digital signal input to the
next terminals 8a to 8m is used as the digital selector 9 The control is sequentially taken, and
comparison data is taken in and stored in a storage device for comparison.
[0020]
Further, when the microcomputer 6 reads the digital signal b 'into the storage device 7, the
microcomputer 6 controls the digital selector 9 to sequentially switch the terminals 8a to 8m of
the input terminal 8 and takes in the digital signal to the microcomputer 6 and stores it in the
storage device 7. The selector 3 selects the signal input to the input terminal 1 of the analog
signal to determine whether the change in the signal level matches any of the stored data, and
the microcomputer 6 is sent to the microcomputer 6 via the AD conversion circuit 10 ′. The
digital signal a 'to be captured is stored in the storage device 7, and the stored a' and b 'are read
out and compared, and a to m of the input terminal 8 of the digital data matched with the analog
data of the function of the input terminal 1 Is determined to be the same function as the function
of analog data, or a function name is designated by operation input and Stored with control
signals for controlling the selector.
A signal for controlling the reproduction operation and instructing the input of the input signal to
the device to which this input signal is sent is made by synchronization control or the like via the
digital terminal 8 or by providing a digital line exclusively for control .
[0021]
When the microcomputer 6 controls the digital selector 9, selects the input terminal 8, and
compares data, it is stored in the storage unit 7. If there is an input terminal 8n for which a
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function has already been determined, it is determined to be the storage unit. The setting
operation can be performed quickly by comparing the input terminals 8n excluding the stored
input terminals first.
[0022]
The determination operation by the comparison circuit of another embodiment of the
amplification device of the present invention shown in FIG. 3 will be described.
When comparing an analog signal a input from the input terminal 1 of an analog signal with a
signal b obtained by DA conversion of a digital signal input from the input terminal 8 of a digital
input signal, the digital signal input to the input terminal 8 Is converted to an analog signal
through the D / A conversion circuit 10 and then input to the input terminal 1 of the analog
signal b passed through the level control circuit 11 controlled by the microcomputer 6 and the
analog signal selected by the selector 3 The comparison circuit 12 compares the analog input
signal a with the above function to make a judgment.
[0023]
The comparison circuit 12 compares the digitally input signal with the analog input signal, and
outputs “L” to the microcomputer 6 when the change is negative, and “H” when the values
do not match. For example, according to the flowchart shown in FIG. 4 as in the embodiment of
FIG. 1, the microcomputer 6 selects the digital input signal selector for the function of the analog
input signal when the digital input signal matches the analog input signal (S4) The function
setting is performed by storing the assignment of the above in the storage device 7 (S6).
[0024]
During reproduction of the signal input from the analog input terminal 1 by the function, for
example, “CD”, the microcomputer 6 designates reproduction by the digital input signal and
switches by the digital selector 9 and the selector 3. In this case, when the microcomputer 6
takes in the output of the comparator 12 and is "L", the input function of the digital input is
automatically set as "CD" and stored in the table of the storage device 7.
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[0025]
Thereafter, when the user determines that the input of the amplification device is the function
"CD" and designates the operation, the microcomputer 6 reproduces the digital signal with the
digital input function as the function "CD", and also displays the CD to the display, not shown. Is
displayed.
[0026]
When the output of the comparison circuit 12 is "H", the microcomputer 6 sets the digital input
function to "not set", switches the digital input function to the next input signal, takes in the
output of the comparison circuit 12, and sets the digital input function Do the action.
The microcomputer 6 repeatedly performs the comparison operation by switching the digital
selector 9 to the terminals a to m of the digital input terminal 8 in the above operation. The
above embodiment makes it possible to set the digital input function automatically for any analog
input function at high speed and reliably.
[0027]
However, in practice, level differences or delay times often exist between an analog input signal
and a digital input signal, and there is a difference in level between an analog input signal and a
digital input signal. This will be described using An electronic volume or the like is used at the
front stage of the comparison circuit 12 to provide a handle control circuit 11. The
microcomputer 6 controls the level control circuit 11 when comparing the analog input signal
and the digital input signal, and changes the level of the digital signal subjected to DA conversion
while changing the level of the signal of the comparator 12 to the microcomputer 6. When the
output of the comparison circuit 12 changes from "H" to "L" in, for example, 1 to 2 seconds in the
designated signal section, it is determined that the signals match.
[0028]
As a result, when there is a level difference between the analog input signal and the digital signal,
it becomes possible to perform a reliable comparison by adjusting the level, and setting of the
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function of each terminal 8a to m of the digital input terminal 8 can be performed. It is made to
be leak free. As for the level control circuit 11, the level of the digital input signal is controlled by
the microcomputer 6 in FIG. 3, but a level control circuit may be provided on the analog input
signal side. In addition to simplifying the connection between an amplifier such as an AV
amplifier and other AV devices, which has been a complicated operation in the prior art, and
other AV devices, it is possible to solve problems such as being unable to reproduce due to
misconnection.
[0029]
According to the present invention, when the same source signal of the analog signal and the
digital signal is input, the terminal to which the digital signal of the same signal is input
corresponding to the input terminal to which the analog signal is input is investigated Then, the
digital signal can be connected to any digital input terminal, and the connection can be made
easily.
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