JPH03203487A - Voice remote control equipment - Google Patents

Abstract

PURPOSE:To make it possible to execute various controls only by storing the small number of unit voice instruction words by providing a voice recognizing part with an instruction decoding part and allowing the decoding part to discriminate the number and order of unit voice instruction words and output operation instruction data corresponding to a composite voice instruction. CONSTITUTION:A voice recognizing circuit 15 stores voice recognition reference pattern data in a register buffer of a memory 23. Since the case that recognition data D2 stored next to the recognition data D1 stored first in the memory is 'PLAY' when the data D1 is 'CD' means 'REPRODUCING', a combination deciding part 19 in a controller part 16 outputs a remote control signal SR. Similarly, plural recognition data are stored and the storing order of the data and the stored number of data are discriminated by the decoding part 19 and the remote control signal is outputted. Consequently, various controls can be attained by the less number of recognition data.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote control device for remotely controlling various electronic devices, and particularly to an audio visual device (hereinafter referred to as an AV device) etc. using audio. The present invention relates to a transmitter suitable for transmitting remote control signals to.

[Conventional technology]

In recent years, remote control devices have been attached to AV devices such as stereo playback devices, television receivers, cassette tape decks, video tape decks, compact disc players, and laser vision disc players.

As shown in FIG. 8, the remote control device includes a transmitter 100 for transmitting a remote control signal from a remote position from the AV device, which is a controlled device 102, and a transmitter 100 for receiving the transmitted remote control signal and transmitting the remote control signal. Receiver 1 that decodes the control content and transmits it to the controlled device 102
01 is configured as a pair.

Here, FIG. 9 shows the structure of the internal remote control signal. The remote control signal consists of a reader code for notifying the receiver side of data transmission, a custom code and an inverted custom code that instruct the device to be controlled, and a data code and an inverted data code that indicate operation instructions for the device to be controlled. The inverted custom code and inverted data code are used for error detection in the custom code and data code, respectively.

In recent years, in view of the diversification of remote control devices, so-called voice remote control devices have been proposed that allow operation commands (hereinafter referred to as voice commands) to be input by voice instead of key switch operations.

FIG. 10 shows a conventional voice remote control device 115.
The schematic configuration of the transmitter is shown below.

The audio remote control device 115 has a microphone M for converting audio commands into electrical signals.

The converted electrical signal is input to the voice 2 withdrawal path 15, which is constituted by a voice recognition LSI or the like. The voice recognition circuit 15 recognizes the content of the input voice command and outputs command data corresponding to the recognition result. The remote control device 115 has a controller 16 , and the controller section 16 outputs a remote control control signal S to the transmitting circuit 17 based on command data from the voice recognition circuit 15 . The transmitting circuit 17 drives the infrared light emitting diode D based on the remote control signal SR, and transmits the remote control signal RC. The power supply circuit 18 supplies necessary power to each component within the remote control I/roll device 115.

Next, the remote control device 11 shown in FIG.
The operation of step 5 will be explained.

When a voice command is input through the microphone M, the voice recognition circuit 15 converts the input voice command into pattern data. The voice recognition circuit 15 compares this voice command pattern data with a plurality of pre-stored standard pattern data, and determines the distance between the voice command pattern data and the standard pattern data. As a result, command data corresponding to the standard pattern data with the shortest distance is output. In addition, as another speech recognition method, the similarity of both data is calculated using a similarity method such as the simple similarity method.
It is also possible to adopt a method of outputting command data corresponding to standard pattern data with the highest degree of similarity. The command data generated in this way is sent to the controller section 16.
is output to.

The controller unit 6 sends a remote control control signal SR corresponding to the input command data to the transmitting circuit 17. The transmitting circuit 17 drives the infrared light emitting diode D1 based on the remote control signal S, and transmits the remote control signal RC. The controlled device 102 is remotely controlled by this remote control signal RC.

As described above, in the conventional voice remote control device, a - remote control signal corresponds to a - voice command.

[Problems that the invention attempts to solve]

1. In conventional voice remote control devices, one voice command word represents one operation command, so if you want to provide many functions, a huge amount of storage capacity is required. There was a problem with that.

In view of the above problems, an object of the present invention is to provide a voice remote control device that can realize many functions with a small storage capacity.

[Means to solve the problem]

FIG. 1 shows a diagram explaining the principle of the present invention.

The voice remote control device 1 includes a microphone M that converts voice commands into electrical signals, a voice recognition unit 2 that recognizes input voice commands based on the electrical signals from the microphone M, and outputs corresponding command data. It includes a transmitting section 3 that generates and transmits a remote control signal RC based on command data, and a power supply section 4 that supplies power to each section of the voice remote control device 1 through power lines 7 and 8, and further includes a transmitting section 3 that generates and transmits a remote control signal RC based on command data. The unit 2 includes a command decoder 5 that decodes a compound voice command consisting of a combination of a plurality of unit voice command words and outputs corresponding operation command data.

[Effect]

According to the present invention, the command decoding unit 5 determines the number of words, order, etc. of a plurality of unit voice command words constituting a compound voice command,
Output operation command data corresponding to the composite voice command. A remote control signal corresponding to this operation command data is generated by the transmitter 3 and transmitted. As a result, the voice remote control device can perform many controls by simply storing a small number of unit voice commands.

〔Example〕

The present invention will be described in detail with reference to FIGS. 2 to 7.

First, the appearance of the audio remote control device (transmitter) will be explained. As shown in FIG. 2, the voice remote control device 10 includes a casing 1 shaped like a
1 is integrally constructed. A microphone M is provided on one surface of the casing 11, and an infrared light emitting diode D for transmitting a remote control signal is provided on the upper surface of the casing 11. Casing 11
A voice input switch (hereinafter referred to as a talk switch) 12 that closes when pressed when inputting voice and an operation changeover switch 13 that switches between voice recognition operation and voice registration operation are provided on the side surface of the switch. Casing 1
1 contains an electronic circuit of an audio remote control device 10 according to the present invention.

Configuration of Electronic Circuit Next, FIG. 3 shows a detailed block diagram of an embodiment of the electronic circuit of the audio remote control device 10.

In FIG. 3, the same parts as in the conventional example shown in FIG. 10 are given the same reference numerals and will be described below.

This embodiment differs from the conventional example shown in FIG. 10 in that the controller section 16 is provided with an instruction decoding section 19.

This command decoding unit 19 decodes the compound voice command based on the number of words, order, etc. of a plurality of unit voice command words constituting the compound voice command, and uses the decoding result, that is, remote control control corresponding to the compound voice command. The signal SR is output to the controller section 16. Second, the controller unit 1 sends an operating state control signal S to enable the audio remote control device 10 to operate only when audio is input.
6 is provided with a talk switch 12 for outputting the output to 6. As this I/- switch 12, a so-called pushbutton type automatic return type switch, a slide switch, or the like can be used.

Thirdly, an operation changeover switch 13 is provided.

The operation changeover switch 13 is a mode changeover switch 13 for changing over the operation of the voice recognition circuit 15 between & voice registration mode and voice recognition mode, and outputs an operation changeover signal to the controller section 16.

As shown in FIG. 4, the voice recognition circuit 15 includes an analog processing section 21 that processes a voice command input through a microphone M and outputs the result as time-division digital data 20, and an analog processing section. 21, a speech recognition processor 22 that performs speech recognition based on time-division digital data 20, a memory 23 that stores standard pattern data for speech recognition, and an interface unit 24 that performs an interface operation with the outside. There is.

As shown in FIG. 5, the analog processing section 21 is roughly divided into an amplifier 30 that amplifies the voice command input through the microphone M to an appropriate level, and an amplifier 30 that divides the output of the amplifier into predetermined frequency bands. A filter bank 31 rectifies and outputs the divided waveform for each frequency band, and an analog/digital converter (hereinafter referred to as A/D converter) that performs analog/digital conversion of the output signal of the filter bank 31 for each frequency band.
It is called the D conversion section. ) 32, and an interface unit 33 that performs an interface operation for exchanging data with the voice recognition processor 22.

The filter bank 31 receives a plurality of input voices (see FIG. 6(a)).
Here are four examples. ), a rectifier 3B36 that rectifies the output signal of the band pass filter section 35, and a low pass filter section 37 that removes ripple components of the output signal of the rectifier section 36. I'm here.

The bandpass filter section 35 has center frequencies f, f, f, and r3 corresponding to a plurality of frequency bands, respectively.
(However, it is assumed that fo<f, <f2<2 f3.) It consists of a plurality of (four in the figure) bandpass filters BPFo-BPF3.

The rectifier unit 36 includes rectifiers RCTo-RCT3 connected in series to each of the band-pass filters BPFo-BPF3 of the band-pass filter unit 35, and rectifies the output signal of the BPFo-BPF3 for each frequency band.

The low-pass filter section 37 includes each rectifier R of the rectifier section 36.
Low-pass filters LPFo-LPF3 are connected in series to CT-RCT3, respectively, and remove ripple components included in rectified waveforms for each frequency band.

The A/D conversion unit 32 is connected in series to each of the low-pass filters LPF to LPF3 of the low-pass filter unit 37, and is connected to each of the low-pass filters LPF.

- An A/D converter ADC-ADC3 that performs analog/digital conversion of the output signal of the LPF3.

Here, the operation of the analog processing section 21 will be explained.

However, to simplify the explanation, one divided frequency band,
(For example, the processing of the band pass filter BPF3 system) will be described, but similar processing is performed for other divided frequency bands. .

When a voice command is input from the microphone M, the output electrical signal is amplified to an appropriate signal level by the amplifier 30 and a signal A is output (see FIG. 6(b)). The amplified signal A is input to a bandpass filter BPF3,
Only the passband component signal B of the bandpass filter BPF3 is output to the rectifier RCT3 (see FIG. 6(C)).

Signal B is rectified by RCT3, and its rectified output signal C
is input manually to the low-pass filter LPF3.

The low-pass filter LPF3 removes the ripple component contained in the signal C and outputs its output signal D (see FIG. 6(e)) to the A/D:1 inverter ADC3. The A/D converter ADC3 converts the input signal into 4-bit time-division digital data (1010) (0111), (0101), (0111), as shown in FIG. 6(f), for example.
), (llOri,...).

As shown in FIG. 5, the voice recognition processor 22 is connected to a system controller section 40 that analyzes and processes control commands given from the controller sleeve 16 and controls the entire voice recognition processor, and performs distance calculation and memory 23 management. A digital processing section 41 is provided.

The system controller unit 40 includes a CPU 42 that centrally controls the entire audio remote control device IO, a ROM 43 that stores a control program therein, a RAM 44 that temporarily stores data, and an analog processing unit 2.
1 and the digital processing unit 41, an interface unit 45 performs an interface operation for exchanging data with the digital processing unit 41;
Equipped with.

The digital processing unit 41 includes a calculation unit 46 that performs distance calculation and specifies human voice based on the calculation result, a data RAM that stores data necessary for distance calculation, a ROM that stores a distance calculation program, and - a working RA, M that stores processed data; an interface section 50 that performs an interface operation for exchanging data with the analog processing section 21 and the system controller section 40;
An interface section 51 that performs an interface operation for exchanging data with the memory 23 is provided.

Next, the operation of the voice recognition processor 22 will be explained (see FIG. 5). When a control command is input from the controller section 16 via the interface section 24, the system controller section 40 takes in the control command via the interface section 50 and the interface section 45, and analyzes the control command. If the analysis result instructs a speech recognition operation, the digital processing section 41 is again instructed to perform speech recognition processing via the interface section 45 and the interface section 50.

Upon receiving the instruction, the digital processing section 41 takes in the time-division digital data (input audio) 20 from the analog processing section 21 via the interface section 50 into the data RAM 47 . The calculation unit 46 reads out the first standard pattern data from among the plurality of standard pattern data stored in the memory 23 via the interface unit 5. Take the logarithm of each of the first time-division digital data among the plurality of time-division digital data constituting the read standard pattern data and the first time-division data of the input audio, and find the difference between them. . Furthermore, the distance is calculated by squaring the obtained difference and calculating the sum of the squares. In other words, the distance is 20. Here, X time division number f (t) input audio data (time division digital data) fs(t): standard pattern data (time division digital data). Thereafter, distances are calculated for all standard pattern data in the same manner. The smaller the calculated distance value, the higher the probability that the data is similar to a voice command. The recognition results obtained in this way are output to the controller section 16 via the interface section 24 as command data.

Overall Operation Next, the overall series of operations of the voice remote control device 10 according to the embodiment of the present invention will be explained.

First, an overview of the operation procedure of the audio remote control device 10 and the operations associated with the operation will be explained.

The operation of the voice remote control device 10 depends on the press or release (ONloFF) of the talk switch 12. When the talk switch 12 is pressed, a transmission operation is enabled, and when the talk switch 12 is released, the device waits for input of a voice command in a low power consumption mode. There are two input modes for voice commands; one is registration of the operator's voice command, and the other is recognition of the operator's voice command. Registration of voice commands is a command term arbitrarily determined by the operator, for example, an operation command of "play" is changed to "play".
This is to record it in the voice remote control device 10 by pronouncing it. Recognition of a voice command involves, when a command term registered as described above, for example, "play", is input, the "play" is recognized as a "playback operation" and command data for that purpose is generated.

At present, the 1-- switch 12 is not pressed, and the voice remote control device 10 is in a standby state.

First, the controller unit 16 initializes the registration buffer number to 1 (step SL).

Next, the controller unit 16 detects whether the talk switch 12 is pressed (step S2). This detection is performed by detecting whether or not the operating state control signal S is output. If the operating state control signal S is output at this time, it means that the talk switch 12 has been pressed, and the controller section 16 puts the voice remote control device 10 into a state in which voice commands can be accepted, and the process returns to step 3. Transition.

If the l·- switch 12 is not pressed, the standby state remains and the process of step S2 is repeated.

After that, the controller unit 16 reads the state of the operation changeover switch 13 and determines whether it is in the registration mode (
Step 33).

If it is the registration mode, the process moves to step S4, and the controller unit 16 outputs a command to the voice recognition circuit 15 to move to the voice registration process. At the same time, the controller unit 16 sends the registered buffer number to the voice recognition circuit 1.
5 (step S4).

The speech recognition circuit 15 stores the speech recognition standard pattern data in the registration buffer (not shown) on the memory 23, that is, in this case, the registration buffer with the registration buffer number=1 (step 35).

On the other hand, the controller unit 16 reads the status register of the voice recognition circuit 15 and determines whether registration is completed (step 36). If the registration has not yet been completed, the process from step S5 to step S6 is repeated and the process enters a standby state.

If the registration is completed, the registration buffer number is incremented by 1 (step 37).

Next, the controller unit 16 determines whether the registration buffer number has exceeded the maximum registrable number Nmax (step S8), and if it has not exceeded it, the process proceeds to step S2. If it exceeds, the controller unit 16 outputs a command to cancel the registration mode to the voice recognition circuit 15, cancels the registration mode (step S9), and moves the process to step S2.

If not in registration mode, i.e. in recognition mode,
The controller unit 16 outputs a voice recognition command to the voice recognition circuit 15 (step 510). Voice recognition circuit 1
5 performs voice recognition processing using the method described above (
Step 511).

On the other hand, the controller unit 16 reads a status register (not shown) of the voice recognition circuit 15 and determines whether recognition has been completed (step 512). If recognition has not yet been completed, step Sll to step S1
The process in step 2 is repeated and the device enters a standby state. When the recognition is completed, it is determined whether the human voice data and the standard pattern data match, that is, whether the distance is within a predetermined range (step 13). If they match, the controller unit 16 temporarily stores the recognition data in a memory (not shown) (step 514). Next, the controller unit 16 determines whether the talk switch 12 is pressed (step 515). This determination is made by detecting whether or not the operating state control signal S is output.

At this time, if the operating state control signal S is output,
Since the talk switch 12 is pressed, the process moves to step Sll and the recognition process is performed again (step SL).
1 to step 515).

If the operating state control signal S is not output, the talk switch 12 is not pressed, so the controller section 1
The combination determining unit 19 of No. 6 determines the combination of recognition data already stored in a memory (not shown) and outputs the remote control control signal SR to the transmitting circuit 17 (step 816). That is, if the first stored recognition data D (not shown) is, for example, "CD", and there is no recognition data D2 (not shown) stored next, then , means "turn on the power of the CD player", and outputs the remote control control signal SR for that purpose. However, the recognition data D stored next to the recognition data D1 "CD" is "PLA".
If it is "Y", it means "playback of CD player", and a remote control control signal S for that purpose is output.Similarly, multiple pieces of recognition data are stored, and the storage order and storage order of the recognition data are determined. By determining the number etc. by the command decoding unit 19 and outputting the remote control control signal, more control can be performed with a smaller number of recognition data.Especially when numbers or alphabets are used as the recognition data. is a mathematical permutation (=nP
+o However, n is the number of registered recognition data, and r is the number of combined recognition data. ) can be controlled as many times as possible.

The transmitting circuit 17 that has received the remote control control signal SR transmits the corresponding remote control signal RC (step 517), and the process moves to step $2.

If they do not match, the controller unit 16 determines whether or not the recognition data is stored in a memory (not shown) (step 518), and if there is valid recognition data, the process proceeds to step S], 6- The process moves to step S17, and a remote control signal is transmitted.

If there is no valid recognition data, error processing such as sounding a buzzer is performed (step 5i9), and the process moves to step S2.

(Effects of the Invention) As described above, the present invention has a command decoding unit that determines the combination of a plurality of voice command words that constitute a compound voice command, and outputs a remote control signal corresponding to the compound voice command. Since it operates to transmit data, it is possible to perform more control with a smaller number of recognition data.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram of the principle of the present invention, Fig. 2 is an external view of the remote control device of the present invention, Fig. 3 is a block diagram of the remote control device of the present invention, Fig. 4 is a block diagram of the voice recognition circuit, Fig. 5 is a detailed block diagram of the voice recognition circuit, Fig. 6 is a detailed explanatory diagram of the analog processing section, Fig. 7 is an operation flowchart of the present invention, Fig. 8 is a schematic explanatory diagram of the remote control device, and Fig. 9 is a detailed explanatory diagram of the analog processing section. FIG. 10, an explanatory diagram of remote control signals, is a block diagram of a conventional voice remote control device. 1... Voice remote control device 2... Voice recognition section 3... Transmission section 4... Power supply section 5... Command decoding section 10... Voice remote control device 11... Casing 12...・Audio input switch (1/- switch) 13
...Operation changeover switch 15...Voice recognition circuit 16...Controller section F...Transmission circuit 18...Power supply circuit 19...Command decoding section 20/Time division digital data 21...Analog processing section 22...Voice recognition processor 23...Memory 24...Interface section 30...Amplifier 31...Filter bank 32...A/D conversion section 33...Interface section 35...Band pass filter Section 36... Rectifier section 37... Low pass filter section 40... System controller section 41... Digital processing section 42... CPU 43... ROM 44... RAM 45... Interface section 46... - Arithmetic section 47... Data RAM 48 - ROM 49... Working RAM 50... Interface section 5]... Interface section

Claims (1)

[Scope of Claims] A microphone that converts a voice command into an electrical signal, a voice recognition unit that recognizes the content of the voice command input through the microphone and outputs corresponding command data, and a voice recognition unit that recognizes the content of the voice command input through the microphone and outputs corresponding command data; In a voice remote control device comprising a transmitting section that generates and transmits a remote control signal, and a power supply section that supplies power to each part of the voice remote control device, the voice recognition section is configured to combine a plurality of unit voice command words. What is claimed is: 1. A voice remote control device comprising: a command decoding section that decodes a composite voice command consisting of the following and outputs corresponding operation command data.