KR20120122676A - Receiver receiving remote control signal using infrared ray and multimedia device comprising them - Google Patents

Abstract

PURPOSE: A receiver of a remote control signal and a multimedia device equipping the same using an infrared ray are provided to receive an infrared signal by a remote controller by using a respectively different infrared ray communication method. CONSTITUTION: A receiving unit(1) receives a remote controller signal for controlling an operation of a multimedia device. A controlling unit(4) generates a control signal for controlling an operation of the multimedia device by using the received remote controller signal. The controlling unit includes a carrier wave detecting unit, a modulation mode detecting unit, a protocol determining unit, and a control signal generating unit. The protocol determining unit determines a protocol type by using carrier wave. The control signal generating unit generates a control signal for controlling an operation of the multimedia device from the remote controller signal according to the determined protocol type. [Reference numerals] (1) Receiving unit; (4) Controlling unit; (41) Transfer detecting unit; (42) Modulation mode detecting unit; (43) Protocol detecting unit; (44) Control signal generating unit; (AA) Multimedia device control

Description

Receiver of a remote control signal using infrared rays and a multimedia device having the same {RECEIVER RECEIVING REMOTE CONTROL SIGNAL USING INFRARED RAY AND MULTIMEDIA DEVICE COMPRISING THEM}

The present invention relates to a remote control signal receiver for receiving a remote control signal using an infrared signal and a multimedia apparatus having the same.

With the development of the electronic communication field and the demand of numerous multimedia contents, various communication devices and digital devices are becoming popular. These various devices are being manufactured to be remotely controlled in a short distance for ease of use. Infrared transceivers are often used to remotely control these devices. Infrared transceivers have been applied to existing home appliances such as TVs and VCRs, and have served as wireless controllers. However, recently, infrared transceivers have been applied to industrial electronic systems of two-way TVs, notebook computers, digital cameras, and mobile communication terminals, and their utilization has been greatly increased.

As communication devices and digital devices, such as the above, are widely used, the number of remote controllers for remotely controlling these devices is increasing in homes or companies using these devices. In general, since the method of controlling these communication devices and digital devices by using an infrared transceiver such as a remote controller is different for each manufacturer or model, it is impossible to remotely control another device using a remote controller for a specific device. Therefore, in order to control each device remotely, a dedicated remote controller must be used. Accordingly, in order to control a plurality of devices in one place, it is inconvenient to store and use a plurality of remote controllers for controlling a plurality of devices.

In order to alleviate the above inconveniences, so-called integrated remote controllers that can control various devices have emerged. Using these integrated remote controllers, TVs, audio, DVD players, VCRs, set-top boxes, air conditioners, air cleaners, and lighting devices It is possible to control such home appliances. In the early days, the integrated remote controller was a form of transmitting a pre-stored control code to control a specific home appliance, but recently, an integrated remote controller has been introduced that can copy and use a remote control function of a specific home appliance by using a learning function.

The present invention provides a remote control signal receiver capable of controlling the operation of a multimedia device using various types of remote control.

Remote control signal receiver according to one type of the present invention, the receiver for receiving a remote control signal for controlling the operation of the multimedia device; And a controller configured to generate a control signal for controlling an operation of the multimedia apparatus by using the received remote controller signal.

According to an embodiment of the present disclosure, the controller may generate a control signal for controlling the operation of the multimedia apparatus according to a protocol format of the remote control signal.

According to another embodiment of the present invention, the control unit includes a carrier detection unit for detecting a carrier of the remote control signal; A modulation method detection unit for detecting a modulation method of the remote control signal; A protocol determination unit that determines a protocol format using the detected carrier and modulation scheme; And a control signal generator configured to generate a control signal for controlling an operation of the multimedia apparatus from the remote control signal according to the determined protocol format.

According to another embodiment of the present disclosure, the protocol determination unit may determine a protocol format by referring to a lookup table including a plurality of carriers and a protocol format corresponding to a plurality of modulation schemes.

According to another embodiment of the present invention, the remote control signal includes one of a plurality of commands for commanding different operations of the multimedia device, and the control signal generation unit receives a control signal corresponding to the command included in the remote control signal Can be generated.

According to another embodiment of the present invention, a command setting unit for setting a command included in the remote control signal to correspond to one of the control signal; And a storage unit which stores a correspondence relationship between the set command and a control signal corresponding to the set command, wherein the control signal generator is controlled from a command included in the remote control signal according to the correspondence stored in the storage unit. You can generate a signal.

According to another aspect of the present invention, there is provided a multimedia apparatus including: a receiver configured to receive a remote controller signal; A controller configured to generate a control signal for controlling an operation by using the received remote controller signal; And a driving unit operating according to the control signal.

According to an embodiment of the present disclosure, the controller may generate a control signal for controlling the operation of the multimedia apparatus according to a protocol format of the remote control signal.

According to another embodiment of the present invention, the control unit includes a carrier detection unit for detecting a carrier of the remote control signal; A modulation method detection unit for detecting a modulation method of the remote control signal; A protocol determination unit that determines a protocol format using the detected carrier and modulation scheme; And a control signal generator configured to generate a control signal for controlling an operation of the multimedia apparatus from the remote control signal according to the determined protocol format.

According to another embodiment of the present disclosure, the protocol determination unit may determine a protocol format by referring to a lookup table including a plurality of carriers and a protocol format corresponding to a plurality of modulation schemes.

According to another embodiment of the present invention, the remote control signal includes one of a plurality of commands for commanding different operations of the multimedia device, and the control signal generation unit receives a control signal corresponding to the command included in the remote control signal Can be generated.

According to another embodiment of the present invention, a command setting unit for setting a command included in the remote control signal to correspond to one of the control signal; And a storage unit which stores a correspondence relationship between the set command and a control signal corresponding to the set command, wherein the control signal generator is controlled from a command included in the remote control signal according to the correspondence stored in the storage unit. You can generate a signal.

The remote control signal receiver and the multimedia apparatus having the same according to the present invention have an advantage of receiving an infrared signal by a remote controller using different infrared communication methods and controlling the corresponding multimedia apparatus according to the received infrared signal. In addition, there is an advantage that the control operation of the multimedia apparatus corresponding to the plurality of buttons included in the remote control may be arbitrarily set through the command setting unit provided in the remote control signal receiver.

1 and 2 is a block diagram of a remote control signal receiver according to an embodiment of the present invention,
3 and 4 are a flow chart for explaining the operation of the remote control signal receiver according to the present invention;
5 is a diagram illustrating an example of a method of associating a command with a control signal;
6 is a block diagram of a multimedia device according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings will be described embodiments of the present invention; Like reference numerals in the drawings refer to like elements, and the size or thickness of each element may be exaggerated for clarity.

1 is a block diagram of a remote control signal receiver according to an embodiment of the present invention.

As shown in FIG. 1, a remote control signal receiver according to an embodiment of the present invention includes a receiver 1 and a controller 4.

The receiver 1 receives a remote controller signal for controlling the operation of the multimedia apparatus from the remote controller. Multimedia devices include all electronic and home appliances such as TVs, audio, DVD players, VCRs, set-top boxes, air conditioners, air purifiers, lighting devices, and the like. The remote controller for transmitting the remote control signal does not necessarily need to be a remote controller bundled in the manufacture of a multimedia device, and any remote controller for transmitting the remote control signal using infrared rays may be included. Since the infrared ray is used as the remote control signal, the receiver 1 may be formed of an element (eg, an infrared ray sensing diode) that detects an infrared ray signal. The receiver 1 may include an amplifier for amplifying the weak infrared remote control signal, a limiter for constantly adjusting the level of the amplified signal, and a band pass filter (BPF) for removing noise.

The controller 4 generates a control signal for controlling the operation of the multimedia apparatus using the remote controller signal received by the receiver 1. According to an embodiment of the present disclosure, the controller 4 may include a carrier detector 41, a modulation method detector 42, a protocol determiner 43, and a control signal generator 44.

In general, remote controllers provided to multimedia devices manufactured by different types and manufacturers generate remote controller signals using different protocols, and transmit the generated remote controller signals. Examples of protocols used for remote control signals are summarized in Table 1 according to carrier, modulation method, address length, and command length. Examples of protocols used for remote control signals are summarized in Table 1 according to carrier, modulation method, address length, and command length. A detailed description of each protocol will be given later in the description of the remote controller signal receiver of the present invention.

protocol carrier
(kHz) Modulation method Address length (bit) Instruction length
(ms) ITT - pulse distance 4 1.7-2.7 JVC 38 pulse distance 8 1.05 or 2.10 NEC 38 pulse distance 8 1.125 or 2.25 Nokia NRC17 38 Bi-phase coding 4 or 4bit sub-code One Sharp 38 pulse distance 5 1 or 2 Sony SIRC 40 pulse width 5 1.2 or 0.6 Philips RC-5 36 Bi-phase coding 5 1.778 Philips RC-6 36 Bi-phase coding - - Philips RC-MM 36 pulse position coding - 3.5-6.5 Philips RECS-80 36 pulse distance 7 or 20 sub-system 5.1 or 7.6 RCA 56 pulse distance 4 1.5 or 2.5 X-Sat 38 pulse distance 8 1 or 2

The controller 4 determines each protocol format from the remote controller signal received by the receiver 1, extracts a command from the remote controller signal according to the determined protocol format, and generates a control signal according to the extracted command. In order to determine the protocol type, the controller 4 may use the frequency and modulation scheme of the carrier. In addition to the frequency and modulation scheme of the carrier, the controller 4 may determine the protocol format using the address length and the command length, if necessary.

According to another embodiment of the present invention, the remote control signal receiver may store the lookup table shown in Table 1 in the storage unit, and the controller 4 may determine the protocol format of the remote control signal by referring to the lookup table stored in the storage unit. . In addition, the remote control signal receiver may access an external server on which a protocol database is constructed through a wired / wireless communication network to download a lookup table for a protocol type and update the downloaded lookup table.

The carrier detector 41 detects a carrier wave of a remote control signal. The remote controller that generates and transmits a remote control signal using infrared rays should be driven with low power in consideration of the capacity of the built-in battery. Since the remote control signal is greatly affected by noise when driven at low power, the noise characteristics must be excellent in order to accurately control a remote multimedia device. In general, to achieve this purpose, the remote control modulates a remote control signal and transmits it on a high frequency carrier. The carrier detection unit 41 detects the frequency of the carrier by analyzing the remote control signal received by the receiver 1. According to the protocol of the remote control signal, the carrier frequency adopts various methods such as 36kHz, 38kHz, 40kHz, 56kHz.

The modulation method detection unit 42 detects the modulation method of the remote control signal. The method of modulating the remote control signal includes the pulse distance modulation method that expresses the signal by dividing the distance between the pulses, the bi-phase modulation method that expresses the signal by dividing the two phases according to the order in which the marks and spaces are located. It adopts various methods such as pulse position modulation method to express signals according to position.

The protocol determining unit 43 determines the protocol type by using the detected carrier and modulation method. The protocol determiner 43 may determine the protocol format by referring to a lookup table corresponding to the protocol format according to the carrier and modulation scheme as shown in Table 1 below.

The control signal generator 44 generates a control signal for controlling the operation of the multimedia apparatus from the remote control signal according to the determined protocol format. In detail, the control signal generator 44 may extract a command from the remote controller signal according to the determined protocol format, and generate a control signal according to the extracted command.

According to another embodiment of the present invention, the remote control signal includes one of a plurality of commands for commanding different operations of the multimedia device, the control signal generator 44 is a control signal corresponding to the command included in the remote control signal Can be generated.

2 is a configuration diagram of a remote control signal receiver for arbitrarily setting a corresponding relationship between each command and a control signal corresponding to each command. As shown in FIG. 2, the remote control signal receiver according to an embodiment of the present invention includes a command setting unit 3 for setting a command included in the remote control signal to correspond to one of arbitrary control signals, and a set command and a set command. It may include a storage unit 2 for storing the corresponding relationship of the control signal corresponding to the command. In this case, the control signal generator 44 generates a control signal from a command included in the remote control signal according to the correspondence stored in the storage.

Hereinafter, the operation of the remote control signal receiver of the present invention will be described with reference to FIGS. 3 and 4.

3 and 4 are flowcharts for explaining an example of the operation of the remote control signal receiver of the present invention.

In FIG. 3, in operation S31, the receiver 1 receives a remote controller signal from a remote controller to determine a protocol of the remote controller signal. In this step, as a step of receiving a remote control signal to determine the protocol of the remote control signal, it may be a remote control signal generated by pressing any button provided on the remote control.

In step S32, the carrier detection unit 41 detects a carrier of the received remote control signal. In step S33, the modulation method detection unit 42 detects the modulation method of the received remote control signal. In step S34, the protocol determination unit 43 determines the protocol type using the detected carrier and modulation scheme.

In step S35, the controller 4 determines the address containing the command from the remote control signal. The controller 4 extracts the command from the determined address.

In step S36, the command setting unit sets a correspondence relationship between the extracted command and a control signal corresponding to the command. In step S37, the correspondence between the set command and the control signal is stored in the storage unit. By repeating steps S36 and S37, a command corresponding to a plurality of buttons included in the remote controller may be associated with a control signal for controlling the operation of the multimedia apparatus.

In operation S41 of FIG. 4, a remote controller signal for controlling the operation of the multimedia apparatus is received through the receiver 1. In step S42, the control unit 4 generates a control signal corresponding to the command included in the remote control signal according to the corresponding relationship stored in the storage unit 2 through the steps S31 to S36. In step S43, the controller 4 controls the operation of the multimedia device using the generated control signal.

5 is a diagram illustrating an example of a method of associating buttons (commands) included in a remote controller with operations (control signals) of a multimedia device.

As shown in FIG. 5, the remote controller 51 is provided with a plurality of buttons. Although not shown in FIG. 5, the remote controller signal receiver of the present invention is embedded in the multimedia device 52. Each of the buttons of the remote controller 51 may correspond to each operation of the multimedia device 52 through the remote controller signal receiver. In FIG. 5, a correspondence between a command corresponding to a button of a remote control and a control signal corresponding to an operation of a multimedia device is provided by providing a pop-up menu through a display provided in the remote control signal receiver or the multimedia device 52. Can be randomly selected. In Figure 5, by pressing any button of the remote control 51 transmits the remote control signal to the remote control signal receiver, by selecting and storing the operation, such as play, stop or fast forward through the pop-up menu, the correspondence between the command and the control signal Can be set simply.

As described above, each protocol described in Table 1 will be described in detail.

The ITT protocol transmits a remote control signal including a command without using a high frequency carrier. The ITT protocol uses 14 very short (10 Hz per infrared) pulses per signal (per message) and three different pulse widths (100 Hz: logic 0, 200 Hz: logic 1, 300㎲: lead-in & lead-out). The length of the remote control signal of the ITT protocol is 1.7ms to 2.7ms.

The JVC protocol uses a 38 kHz carrier to transmit remote control signals. In the JVC protocol, the address length is 8 bits and the instruction length is 8 bits. The JVC protocol uses pulse distance modulation and each pulse width is 526 kHz. If the time interval between pulses is 2.10 ms, logic 1 is displayed, and if it is 1.05 ms, logic 0 is displayed.

The NEC protocol uses a 38 kHz carrier to transmit remote control signals. In the NEC protocol, the address length is 8 bits and the instruction length is 8 bits. The NEC protocol uses pulse distance modulation and each pulse width is 560 kHz. If the time interval between pulses is 2.25ms, logic 1 is shown, and if it is 1.12ms, which is half of 2.25, logic 0 is shown.

The Nokia NRC17 protocol uses a 38kHZ carrier to transmit remote control signals. In the Nokia NRC17 protocol, the address length is 4 bits and 4 bits sub-code, and the instruction length is 8 bits. The Nokia NRC17 protocol uses bi-phase (non return to zero) modulation. In the Nokia NRC17 protocol, all bits have the same length of 1 ms, and each bit is two bits each occupied by 500 ms in order of "burst-idle" (logic 1) or "child-burst (logic 0). It is made of one of two kinds.

The Sharp protocol transmits remote control signals using a 38kHz carrier. In the Sharp protocol, the address length is 5 bits and the instruction length is 8 bits. The Sharp protocol uses pulse distance modulation and each pulse width is 320µs. If the time interval between pulses is 2ms, logic 1 is displayed, and if 1ms, logic 0 is displayed.

The Sony SIRC protocol transmits remote control signals using a 40kHz carrier. In the Sony SIRC protocol, the address length is 5 bits and the instruction length is 7 bits. The Sony SIRC protocol uses a pulse width modulation scheme, where " 1.2ms burst-600 ms idle " represents logic 1 and " 600 ms burst-600 ms idle "

The Philips RC-5 protocol transmits remote control signals using a 36 kHz carrier. In the Philips RC-5 protocol, the address length is 5 bits and the instruction length is 6 bits. The Philips RC-5 protocol uses dual phase modulation and all bits are 1.778ms long. Each bit consists of either "burst-idles" (logical 0) or "idle-burst" (logic 1) each having a length of 889 ms.

The Philips RC-6 protocol transmits remote control signals using a 36 kHz carrier. The Philips RC-6 protocol uses dual phase modulation. The Philips RC-6 protocol has a total of five different data: leader pulse, normal bit (two types) and trailer bit (two types). The leader pulse is composed of a 6t (1t = 444 ms) long mark (part with a pulse signal) and a 2t long space (idle state). The trailer bit consists of 2t of "space-mark" (logic 0) or "mark-space" (logic 1). The normal bit consists of 1t of "space-mark" (logic 0) or "mark-space" (logic 1).

The Philips RC-MM protocol transmits remote control signals using a 36 kHz carrier. The Philips RC-MM protocol uses pulse position modulation. The Philips RC-MM protocol has a header and data bits. The header consists of a mark of 15 pulses (416.7 ms) and a space of 10 pulses (277.8 ms). The data bits are "00" consisting of 6 pulses (166.7 ms) and 10 pulse spaces, "01" consisting of 6 pulses and 16 pulses (444.4 ms), 6 pulses mark and 22 pulses (611.1). It consists of four types of "10" consisting of a space of 6), "11" consisting of a mark of 6 pulses and a space of 28 pulses (777.8 ms).

The Philips RECS-80 protocol transmits remote control signals using a 38 kHz carrier. The Philips RECS-80 protocol has an address length of 7 or 20 sub-systems and a length of 64 instructions. The Philips RECS-80 protocol uses 1 or 2 toggle bits to prevent key bounce. The Philips RECS-80 protocol uses pulse distance modulation and each pulse width is 158µs. If the pulse time including the mark and space of 158 ms is 5.06 ms, logic 0 is displayed, and if 7.59 ms, logic 1 is displayed.

The RCA protocol uses a 56 kHz carrier to transmit remote control signals. In the RCA protocol, the address length is 4 bits and the instruction length is 8 bits. The RCA protocol uses pulse distance modulation and each pulse width is 500 ms. If the time interval between pulses is 2.50 ms, logic 1 is displayed, and if 1.50 ms, logic 0 is represented.

The X-Sat protocol uses a 38 kHz carrier to transmit remote control signals. In the X-Sat protocol, the address length is 8 bits and the instruction length is 8 bits. The X-Sat protocol uses pulse distance modulation and each pulse width is 526 kHz. If the time interval between pulses is 2ms, logic 1 is displayed, and if 1ms, logic 0 is displayed.

6 is a block diagram of a multimedia apparatus according to an embodiment of the present invention.

The multimedia apparatus illustrated in FIG. 6 includes a receiver 61, a controller 64, and a driver 65.

The receiver 61 receives a remote controller signal for controlling the operation of the driver 65 from the remote controller. The remote control may be an infrared remote control used exclusively for other multimedia devices. Since the infrared ray is used as the remote control signal, the receiver 61 may be formed of an element that senses an infrared signal such as an infrared ray sensing diode. The receiver 61 may include an amplifier for amplifying the weak infrared remote control signal, a limiter for constantly adjusting the level of the amplified signal, and a band pass filter for removing noise.

The controller 64 generates a control signal for controlling the operation of the driver 65 using the remote controller signal received by the receiver 61. According to an embodiment of the present disclosure, the controller 64 may include a carrier detector, a modulation method detector, a protocol determiner, and a control signal generator.

The remote control transmits remote control signals of different protocol types according to the manufacturer or the type of the multimedia device. The protocol format according to the carrier, modulation method, address length, and command length has been described with reference to Table 1 above.

The controller 64 determines each protocol format from the remote controller signal received by the receiver 61, extracts a command from the remote controller signal according to the determined protocol format, and generates a control signal according to the extracted command. In order to determine the protocol format, the controller 64 may use the frequency and modulation scheme of the carrier. The multimedia apparatus according to the present invention may store the lookup table shown in Table 1 in the storage unit, and the controller 64 may determine the protocol format of the remote control signal by referring to the lookup table stored in the storage unit. In addition, the multimedia apparatus according to the present invention may access an external server on which a protocol database is constructed through a wired or wireless communication network, download a lookup table for a protocol type, and update the lookup table with the downloaded lookup table.

The carrier detector detects a carrier wave of the remote control signal. The carrier detector detects the frequency of the carrier by analyzing a remote control signal received at the receiver. The modulation detection unit detects a modulation method of the remote control signal. The protocol determination unit determines the protocol type by using the detected carrier and modulation method. The protocol determination unit may determine the protocol format by referring to a lookup table corresponding to the protocol format according to the carrier and modulation scheme as shown in Table 1. The control signal generator generates a control signal for controlling the operation of the driver 65 from the remote controller signal according to the determined protocol format. In detail, the control signal generator may extract a command from the remote control signal according to the determined protocol format, and generate a control signal according to the extracted command.

According to another embodiment of the present disclosure, the remote control signal includes one of a plurality of commands for commanding different operations of the driver 65, and the control signal generator generates a control signal corresponding to the command included in the remote control signal. Can be.

In accordance with another aspect of the present invention, a multimedia apparatus includes a command setting unit configured to set a command included in a remote control signal to correspond to one of arbitrary control signals, and a correspondence relationship between a set command and a control signal corresponding to the set command. It may include a storage unit. In this case, the control signal generator generates a control signal from a command included in the remote control signal according to the correspondence stored in the storage unit.

The above-described remote control signal receiver and a multimedia apparatus having the same have been described with reference to the embodiments shown in the drawings for clarity, but this is merely an example, and those skilled in the art can make various modifications therefrom. And other equivalent embodiments are possible. Accordingly, the true scope of the present invention should be determined by the appended claims.

1, 61: receiver 2: storage unit 3: command setting unit
4, 64: control unit 41: carrier detection unit 42: modulation method detection unit
43: protocol determination unit 44: control signal generation unit 51: remote control
52: multimedia device 65: driver

Claims (12)

Receiving unit for receiving a remote control signal for controlling the operation of the multimedia device; And
And a controller configured to generate a control signal for controlling an operation of the multimedia apparatus by using the received remote controller signal. The method of claim 1,
The controller generates a control signal for controlling the operation of the multimedia device according to the protocol format of the remote control signal. The method of claim 1,
The control unit,
A carrier detecting unit detecting a carrier of the remote control signal;
A modulation method detection unit for detecting a modulation method of the remote control signal;
A protocol determination unit that determines a protocol format using the detected carrier and modulation scheme; And
And a control signal generator configured to generate a control signal for controlling the operation of the multimedia apparatus from the remote control signal according to the determined protocol format. The method of claim 3,
And the protocol determiner determines a protocol format by referring to a lookup table including a plurality of carriers and a protocol format corresponding to a plurality of modulation schemes. The method of claim 3,
The remote control signal includes one of a plurality of commands for commanding different operations of the multimedia device,
The control signal generation unit generates a control signal corresponding to the command included in the remote control signal. The method of claim 5,
A command setting unit configured to set a command included in the remote control signal to correspond to one of arbitrary control signals; And
And a storage unit which stores a correspondence relationship between the set command and a control signal corresponding to the set command.
The control signal generator generates a control signal from a command included in the remote control signal according to a corresponding relationship stored in the storage unit. Receiving unit for receiving a remote control signal;
A controller configured to generate a control signal for controlling an operation by using the received remote controller signal; And
And a driving unit operating according to the control signal. The method of claim 7, wherein
The controller generates a control signal for controlling the operation of the multimedia device according to the protocol format of the remote control signal. The method of claim 7, wherein
The control unit,
A carrier detecting unit detecting a carrier of the remote control signal;
A modulation method detection unit for detecting a modulation method of the remote control signal;
A protocol determination unit that determines a protocol format using the detected carrier and modulation scheme; And
And a control signal generator configured to generate a control signal for controlling the operation of the multimedia apparatus from the remote controller signal according to the determined protocol format. 10. The method of claim 9,
And the protocol determination unit determines a protocol format by referring to a lookup table including a plurality of carriers and a protocol format corresponding to a plurality of modulation schemes. 10. The method of claim 9,
The remote control signal includes one of a plurality of commands for commanding different operations of the multimedia device,
The control signal generator generates a control signal corresponding to the command included in the remote control signal. The method of claim 11,
A command setting unit configured to set a command included in the remote control signal to correspond to one of arbitrary control signals; And
And a storage unit which stores a correspondence relationship between the set command and a control signal corresponding to the set command.
And the control signal generation unit generates a control signal from a command included in the remote control signal according to a corresponding relationship stored in the storage unit.

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