KR20090044665A - Remote control unit and data packet transmitted by the remote control unit - Google Patents

Abstract

The proposed remote control unit of the present embodiment is a remote control unit for remotely controlling the operation of a display device, wherein the remote control unit transmits an infrared transceiver for transmitting a predetermined infrared signal, and is transmitted through the infrared transceiver. A memory unit for storing a key code and a control unit for formatting the information contained in the signal received through the infrared transceiver unit to be sent through the infrared transceiver unit, the controller is the display through the infrared transceiver A first signal for requesting transmission of data stored in the device is transmitted, and a second signal received through the infrared receiver is read and stored in the memory unit.

Remote control unit, data format

Description

Remote control unit and data packet transmitted by the remote control unit

The present embodiment relates to a remote control unit, and more particularly, to a data format for transmitting information stored in a display device to another display device, and a compression transmission method of asynchronous serial data.

In general, infrared is widely used as a signal medium for remote control units of home appliances. Until infrared was adopted, other media such as ultrasonic remote controllers were used. The widespread use of the infrared system can be the main reason that the system of prevention of malfunction can be realized.

NEC format is widely used as a data format for controlling an electronic device such as a TV by using a remote control unit to which the infrared method is applied, which is illustrated in FIG. 1.

1 is a diagram for explaining a conventional NEC format.

Among the formats of data transmitted according to the key input of the remote control unit, the NEC format includes a reader part, a custom code part, and a data code part.

The code of the custom code part is a fixed code determined by a diode and a resistor connected to the IC. Since the code of the data code part is different code for each key input, various functions can be assigned.

Next, the format of the transmission code will be briefly described.

The modulation method is PPM (Pulse Position Modulation), which is a general signal type of the infrared remote control unit. The pulse portion is modulated at a carrier frequency of 38 kHz.

The reader section is a signal necessary for reading the signal of the remote control unit, and the receiving circuit or the receiving program is designed to receive the following custom code after detecting the reader section.

The custom code consists of 16 bits and is used as an ID code of a receiver. By strictly handling this code, an infrared remote control system without malfunctions can be realized.

The data code has the same 16-bit configuration as the custom code, but since the first 8 bits and the second 8 bits are in one's complement relationship, the effective bit length of the data is 8 bits. In the reception process of the data code, after storing 16 bits, it is necessary to compare the first 8 bits and the second 8 bits. If the completion of only the first 8 bits of read processing is completed, a malfunction may occur when the signal of the remote control unit is weakened.

The repeat code is the code that is output when the key of the remote control unit is kept pressed.

On the other hand, the NEC format used in the prior art is not suitable for transmitting a large amount of data, and there is a problem that the transmission speed is slow to transmit other data in addition to the key code according to the key input of the remote control unit.

In addition, referring to FIG. 6, data pulses in the NEC format are illustrated. In the case of the NEC format, the data pulses are generally formed in a regular manner, and the receiving side receiving the IR signal is often recognized as a three-wavelength. There is a problem that occurs when filtering by noise.

Accordingly, there is a need for a format method of data capable of smoothly transmitting data received from an external device as well as data transmitted from a remote control unit according to a key code input to another device.

This embodiment proposes a data format that can smoothly transmit specific data to a display device, in addition to sending key codes corresponding to respective key inputs in the remote control unit.

The proposed remote control unit of the present embodiment is a remote control unit for remotely controlling the operation of a display device, wherein the remote control unit transmits an infrared transceiver for transmitting a predetermined infrared signal, and is transmitted through the infrared transceiver. A memory unit for storing a key code and a control unit for formatting the information contained in the signal received through the infrared transceiver unit to be sent through the infrared transceiver unit, the controller is the display through the infrared transceiver A first signal for requesting transmission of data stored in the device is transmitted, and a second signal received through the infrared receiver is read and stored in the memory unit.

In addition, the data format of the present embodiment is a remote control unit having a transceiver for receiving and storing data transmitted from a display device and transmitting the stored data, wherein the data packet transmitted from the remote control unit has a variable length. And a header section, a fault status field for determining the state of the start bit, a data section, and a stop bit. The data section includes a section indicating whether the data state is changed as a duration length, And a section in which the number of bits is determined from the length.

According to the proposed embodiment, it is possible to receive specific data from a display device, and to transmit the received data to another display device, so that a user can set information such as a user environment for each display device or a channel map. The inconvenience of having to download the data can be reduced.

In addition, there is an advantage that the transmission and reception of data can be made smoother by the proposed format of data transmission.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention will be described in detail. However, the spirit of the present invention is not limited to the embodiments in which the present invention is presented, and those skilled in the art who understand the spirit of the present invention can easily make other embodiments by adding, changing, deleting, and adding components within the same scope. It may be suggested, but this is also within the scope of the spirit of the present invention.

2 is a view for explaining the system configuration of the present embodiment, Figure 3 is a view showing the configuration of the remote control unit and the display device according to this embodiment.

First, referring to FIG. 2, the remote control unit 10 of the present embodiment receives data transmitted from the master device 20, stores it, converts it to the data format of the embodiment, and then converts it to another display device 21, 22. ) To transmit to.

In detail, the master device 20 is a device capable of two-way communication with the remote control unit 10, and specifies the data from the data stored when receiving the signal of the data transmission request from the remote control unit 10. To transmit the data to the remote control unit (10).

The master device 20 may also be a display device. In this case, the data transmitted from the master device 20 to the remote control unit 10 may be channel map data or display device as user data. This may be content set by the user such as contrast or brightness.

That is, the channel map data set by the user in the master device 20 is transmitted to the remote control unit 10, or information such as contrast or brightness as the setting of the screen of the master device 20 is also remote. Is transmitted to the control unit 10.

To this end, the master device 20, for example, the display device, stores the received channel map data or data set by the user.

The configuration of the display device and the remote control unit which becomes the master device 20 will be described in more detail with reference to FIG. 3.

Referring to FIG. 3, a display device 100 such as a DTV and a remote control unit 200 for remotely controlling an operation of the display device 100 are included. In particular, the display device 100 includes the above-described display device 100. IR remote control unit 130 for transmitting and receiving a signal containing a specific information to the remote control unit 200 is provided.

The remote control unit 200 includes a key input unit 250, a control unit 210, a memory unit 220, a power supply unit 260, and an IR transceiver 230.

In detail, the key input unit 250 is formed of a plurality of keys for inputting a plurality of control commands, and a plurality of keys are formed to control power on / off, channel up / down, and volume up / down. For example, another type of key may be further formed according to the electronic product to be controlled.

The controller 210 transmits an IR signal according to a signal input through the key input unit 250 through the IR transceiver 230, and in particular, reads a signal received through the IR transceiver 230. It is.

The signal received through the IR transceiver 230 of the remote control unit 200 is output through the IR transceiver 130 of the display device 100, the IR transceiver of the display device 100 ( The signal transmitted through 130 may be channel map data received by the display device or other types of data stored by the user.

Control data for controlling the display device may be stored in the memory unit 220, and the memory unit 220 may be configured as a nonvolatile memory that does not lose stored data even when power is cut off.

In addition, the data transmitted from the display device 100 is stored in the memory unit 220, and such data is stored in the channel map data of the display device 100 or data stored by the user (for example, contrast of DTV, Setting data such as luminance).

In order to transmit data from the display device 100 to the remote control unit 200, the control unit 210 of the remote control unit 200 is stored and stored in the display device 100 through its IR transceiver 230. A first signal is first sent requesting to provide data.

Then, the IR transceiver 130 of the display device 100 receives the first signal transmitted from the remote control unit 200, transmits it to the control unit 110 of the display device 100, The control unit 110 of the display device 100 transmits a second signal including specific data through the IR transceiver 130 in response to the received first signal.

As described above, the second signal includes channel map data stored in the display apparatus 100 or data set and stored by the user. To this end, the memory unit 120 of the display device 100 separately stores channel map data to be transmitted through the IR transceiver 130 and data stored and stored by the user.

Meanwhile, the remote control unit 200 receiving the second signal transmits it to the control unit 210, and the control unit 210 of the remote control unit 200 transmits data included in the received second signal. Read out.

In addition, the controller 210 of the remote control unit 200 may store the channel map data stored in the display device 100 or the separate data set by the user in the memory unit 220. have.

In addition, when a command to transmit data stored in the memory unit 220 is input through the key input unit 250 of the remote control unit 200, the control unit 210 of the remote control unit 200. ) Transmits the data stored in the memory unit 220 to the other display devices 21 and 22.

In detail, when a user wants to perform setting of another display device by using the data received from the display device 100, a specific key formed in the key input unit 250 of the remote control unit 200 is input. When input, the control unit 210 of the remote control unit 200 performs an operation for retransmitting the stored data.

Herein, the control unit 210 of the remote control unit 200 transmits the channel map data or user setting data stored after receiving the data to another display device through the IR transceiver 230.

In this case, the proposed format format for the data retransmitted from the remote control unit 200 will be described in more detail with reference to FIG. 4.

Meanwhile, the configuration of the display apparatus 100 according to the present embodiment will be described. However, the display device 100 illustrated in FIG. 3 may serve as the master device disclosed in FIG. 2, and a plurality of display devices illustrated in FIG. 2 are not shown.

The display device 100 is illustrated as a TV as described above, the display device 100 is a configuration for performing the function of the TV tuner 180 for receiving a broadcast signal, and the tuner 180 Signal processing unit 170 for signal processing, such as decoding the broadcast signal selected through the, and the display unit 160 for displaying the video and audio signal processed by the signal processing unit 170.

In addition, an IR transceiver 130 for receiving the IR signal transmitted from the remote control unit 200 and transmitting the stored data to the remote control unit 200 side is included, and tuned through the tuner 180 The memory unit 120 may store channel map data read from a broadcast signal or data stored and stored by a user.

The IR transceiver 130 of the display device 100 receives a first signal including data for requesting data transmission from the remote control unit 200, and the controller 110 of the display device 100 receives the first signal. To pass.

The controller 110 reads data related to user setting information such as channel map data stored in the memory unit 120 and transmits the information through the IR transceiver 130. That is, the second signal is transmitted through the IR transceiver 130.

In the above disclosure, the configuration using IR for bidirectional communication between the display device as the master device and the remote control unit has been described. However, bidirectional communication between the master device and the remote control unit may be performed by wireless communication using RF in addition to IR, and may also be performed by network connection through a cable such as RS-232C.

Therefore, it should be noted that various modifications of the embodiment may be made to the bidirectional communication method between the display device, which is the master device, and the remote control unit.

Hereinafter, the data format transmitted from the remote control unit to transmit the data received from the first display device to the second display device will be described.

4 is a diagram for explaining a data format method according to the present embodiment.

The data format shown in FIG. 4 is a data pulse when data stored in the remote control unit 100 is transmitted to another display device. Therefore, the data format shown may include data stored and transmitted from the display device.

Referring to Fig. 4, in the data format according to the present embodiment, the duration between data pulses is 2 * k * x, and the header portion 4a and the fault state (FS) field 4b are included in the bitstream. ), A data field 4d, and a stop bit 4f.

According to the data format according to the present embodiment, a state change of data is transmitted to compress and transmit data, and the duration of the data pulse may vary according to the duration of the header portion. In addition, data in which a command is repeated in the transport packet is not transmitted, thereby improving transmission efficiency of the data.

In other words, the duration of the header portion 4a is detected on the receiving side to calculate T, and then data corresponding to the duration detected in the data field is read out using T.

In detail, the header portion 4a is used to calculate the start time and period T of the IR packet at the receiving side, and the duration of the header portion 4a is shown as 4T.

In other words,

Header = k * n, where k is integer value more than 1, and x = 4T = time of duration.

, where k>1

, where k> 1

to be.

As a result, the value of T is determined according to the duration of the header portion 4a, and the value of T becomes a factor for determining the data value in the packet. On the other hand, the header portion 4a is shown that the duration of each phase constituting the pulse is 4T, which can be changed in various ways according to the embodiment, it is to configure two or more pulses constituting the header portion It will be possible too.

Then, a fault status field 4b is formed, which is an area for determining whether the first bit is '0' or '1'. If FS = 1T, logic starts with '1', and if FS = 2T, logic starts with '0'.

The value of the first start bit is determined by the fault status field 4b, and the number of bits is determined by measuring the duration of the pulse in the data field.

In detail, the data field 4d includes a section 4c for changing the state of data and a data bit section 4e including the number of bits of data, and at the receiving side, the section 4e. Calculate the number of bits of data by calculating the duration and dividing by period T.

Referring to the field for changing the state of data, if the duration of the section 4c is 1T, the logic '1' is changed to a logic '0' after this interval, and the logic '0' is a logic. The state is changed to '1'.

In addition, by using the period T detected in the section 4c for changing the state of the data, it is possible to automatically correct the value of T calculated through the header unit. That is, even if a predetermined error occurs for the operation of the period T during the processing of the state of the system or the bit situ, the T value calculated through the duration of the header portion and the T value calculated in the interval for changing the data state. The correction for the period T may be performed by using.

On the other hand, if the duration of the 4c section is 2T, the subsequent data is the same as the previous 1-byte data, indicating that the next start bit is '1'.

When the duration of the 4c section is 3T, the subsequent data is the same as the previous 1-byte data, and the next start bit is '0'.

Therefore, the pulse 4d constituting the data field is composed of a section 4c for changing the data state according to its phase and a data bit section 4e, and a section 4c for changing the state of the data. For the subsequent data, the start bit of the data is variably determined, and the same as the previous byte is included.

In addition, the total length of the data field 4d may be configured in byte units, and the total bytes (n) = 2 ^k transmitted.

In the data field 4d, the data bit section 4e may determine the number of bits by measuring the duration of the pulse. That is, the total number of bits m is M / T, and the receiving side stores the current state (0 or 1) as data by m values.

For example, when the start bit is 1 and the duration of the data bit section 4e is 4T, the receiving side stores data as '1111'.

On the other hand, the stop bit 4f may come in two states, 1T or 2T, and in the case of 1T, it indicates that data transmission is completed. Indicates.

For example, when the stop bit is 2T, the data of the next packet may not actually be transmitted, and the receiving side may add a plurality of data of the packet currently received.

However, in the embodiment of the interpretation of the receiving side according to the duration of the stop bit 4f, various changes may be made, and it is not necessarily limited to the present embodiment disclosed.

On the other hand, when 0 or 1 is continuously present in each data stream, since the data resolution of the receiving side can be exceeded, the receiving side buffer pulse can be used as follows in the state maintaining section.

Target system buffer pulse <1/3 * T, but in this case the receiving system should not change the state of the data.

That is, in the receiving system (display device), if the duration is less than 1 / 3T, this section is not calculated as the duration, so that error handling is performed.

Meanwhile, FIG. 5 exemplarily shows a refit packet of data according to the present embodiment.

That is, when it is desired to transmit the same data as the data of the previously transmitted packet, it is possible to replace the actual data packet by transmitting a refit packet of the type shown in FIG.

In this case, it can be regarded as a refit packet for omitting repetitive transmission of data when the duration of the high phase that comes after the header portion composed of pulses of duration 4T is 3T.

6 and 7 are diagrams comparing the transmission of data according to the existing NEC format and the transmission of data according to the present embodiment.

First, in the case of transmitting 4 bytes in both methods, the result of selecting and comparing the data of the shortest and the longest transmission time for each format is the result.

In the NEC format, the shortest data is 0x00000000 and the longest data is 0xFFFFFFFF. In the case of the present embodiment, the shortest data is 0xFFFFFFFF, and the longest data is 0x55AA55AA.

And, the shortest value of the period that can be used in the NEC format is T = 0.53 ms, but in the case of the present embodiment, it can be shortened to the period T = 0.2 ms.

Referring to FIG. 6, it can be seen that the transmission time required for transmitting the same data is significantly reduced compared to the NEC format. FIG. 7 shows a graph comparing the transmission speed.

In the format according to the present embodiment, when the period T = 0.56ms, the transmission rate is 2.2 times to 3.1 times faster, and when the period T = 0.2ms, the transmission rate is about 6.2 times to 8.6 times faster. do.

1 is a diagram for explaining an existing NEC format.

2 is a diagram for explaining a system configuration of the present embodiment.

3 is a view showing the configuration of a remote control unit and a display device according to the present embodiment.

4 is a diagram for explaining a data format method according to the present embodiment;

Fig. 5 illustrates a refit packet of data according to the present embodiment.

6 and 7 are diagrams comparing the transmission of data according to the existing NEC format and the transmission of data according to the present embodiment.

Claims (7)

In the remote control unit for remotely controlling the operation of the display device, The remote control unit includes an infrared transceiver for transmitting a predetermined infrared signal, a memory unit for storing a key code transmitted through the infrared transceiver, and information contained in a signal received through the infrared transceiver. It includes a control unit for formatting and sending out through the infrared transceiver; The controller transmits a first signal for requesting transmission of data stored in the display device through the infrared transceiver, reads out a second signal received through the infrared receiver, and stores the second signal in the memory unit. Remote control unit. The method of claim 1, And the controller controls the read-out second signal stored in the memory to be retransmitted through the infrared transceiver. The method of claim 1, And the second signal includes channel map data stored in the display device or data set and stored by a user. A remote control unit having a transceiver for receiving and storing data transmitted from a display device and transmitting the stored data, The data packet transmitted from the remote control unit includes a header portion having a variable length, a fault status field for determining a state of a start bit, a data interval, and a stop bit, The data section includes a section indicating whether the data state is changed as a duration, and a section in which the number of bits is determined from the length of the duration. The method of claim 4, wherein And a period T of the data packet is determined from the duration of the header portion. The method of claim 5, wherein The section indicating whether the data state is changed by the length of the duration and the section in which the number of bits is determined from the length of the duration are divided by the phase of the pulse. The interval indicating whether the data state is changed is a data packet, characterized in that the duration is composed of 1T, 2T or 3T. The method of claim 4, wherein The stop bit is a data packet, characterized in that consisting of a pulse having a duration of 1T or 2T, respectively.

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