JP2005352805A - Character input system - Google Patents

Character input system Download PDF

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Publication number
JP2005352805A
JP2005352805A JP2004173408A JP2004173408A JP2005352805A JP 2005352805 A JP2005352805 A JP 2005352805A JP 2004173408 A JP2004173408 A JP 2004173408A JP 2004173408 A JP2004173408 A JP 2004173408A JP 2005352805 A JP2005352805 A JP 2005352805A
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JP
Japan
Prior art keywords
code
input
command
character
key
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Withdrawn
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JP2004173408A
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Japanese (ja)
Inventor
Masahiro Matsuda
匡弘 松田
Original Assignee
Funai Electric Co Ltd
船井電機株式会社
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Application filed by Funai Electric Co Ltd, 船井電機株式会社 filed Critical Funai Electric Co Ltd
Priority to JP2004173408A priority Critical patent/JP2005352805A/en
Publication of JP2005352805A publication Critical patent/JP2005352805A/en
Application status is Withdrawn legal-status Critical

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Abstract

<P>PROBLEM TO BE SOLVED: To provide a character input system that enables an easy character input to AV equipment and prevents a development cost increase in realizing the function. <P>SOLUTION: The character input system comprises: a keyboard device 20 having a plurality of input keys 22, an IEEE 1394-compliant interface 24, and an encoder 21a for generating command codes representing key inputs with vendor-unique commands whose code contents can be defined by a vendor; and the AV equipment 10 having an IEEE 1394-compliant interface 14, a decoder 11a for converting the command codes sent from the keyboard device to character codes, and a control means 11 for inputting characters according to the character codes output from the decoder. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a character input system that allows an AV (audio visual) device to input characters using a keyboard.

  For example, in a DVD (Digital Versatile Disc) recorder or HDD (Hard Disk) recorder, a process for allowing a user to input characters when setting the current time or setting the title of a recorded program is performed.

  Conventionally, when inputting characters in an AV device, for example, after moving the cursor to the character input position with the left and right buttons of the remote control, scroll the characters with the up and down buttons of the remote control and select a desired character, After that, processing such as determining the input character by moving the cursor to the input position of the next character with the left and right buttons again has been performed.

In recent years, many AV devices having an IEEE1394 interface capable of transmitting and receiving various command codes between a plurality of devices have been commercialized, and various application inventions using this interface have been made (for example, Patent Documents 1 and 2).
JP 2003-87262 A JP 2002-523986 A

  If the above-described conventional method is used to input characters to the AV apparatus, for example, when the type of characters to be input and the number of input characters increase, there is a problem that the operation takes a very long time.

  In addition, a device having an IEEE 1394 interface can add various functions by networking a plurality of devices. Among devices having an IEEE 1394 interface, a personal computer is a device that can easily input characters. Since other AV devices have similar character input functions, character input to each AV device has been complicated even in an AV system using an IEEE1394 network.

  In addition, by configuring the personal computer so that characters typed in are input to the AV device, the complexity of character input of the AV device is eliminated. To realize such a configuration, a large number of command functions of IEEE 1394 are provided. Has to be mounted on both the personal computer and the AV device, and the development cost of each device has risen. In addition, there is a problem that this function cannot be used in an IEEE 1394 network to which a personal computer is not added.

  An object of the present invention is to input characters to an AV device with a simple operation, and furthermore, it is only necessary to implement a minimum command function necessary for character input in order to realize the function. The object is to provide a character input system that does not cause a surge.

  In order to achieve the above object, the present invention provides an interface capable of transmitting and receiving code data of a predetermined standard, a plurality of input keys that respectively correspond to a plurality of characters and generate an input signal based on an operation, and the plurality of inputs The input signal indicating the operation state of the key is associated with any one of the codes included in the code range in which the content of the code is not defined in the standard out of the entire range of command codes supplied via the interface. An encoder for generating a command code corresponding to the input signal based on the signal, and a command issuing means for transmitting the command code generated by the encoder to the outside via the interface when the plurality of input keys are operated And a keyboard device having, and transmitting and receiving code data of the predetermined standard Based on the character code obtained by the decoder, the decoder for converting the command code included in the code data sent from the keyboard device into a character code corresponding to the operation state of the plurality of input keys A character input system comprising: an AV device having control means for performing character input processing corresponding to the code.

  According to the above means, it is possible to easily input characters to the AV device using the keyboard device, and the AV device is based on the conventional AV device that accepts character input, and processes the command code for character input. Since it can be configured simply by mounting additional functions, the development cost can be reduced.

  Specifically, the command code generated by the encoder includes a first code indicating a key input operation, a second code indicating a key in a key lock state, and a third code indicating a key that has been input. And a fourth code indicating the key that has been kept pressed at the time of the input operation. With such a configuration, various character input operations can be handled.

  More specifically, the interface is an interface that conforms to the IEEE 1394 standard, and the command code generated by the encoder is a vendor unique command included in a code range that is secured so that the vendor can define the contents of the code. It is preferable that the first code to the fourth code are included in the operand of the vendor unique command.

  With such a configuration, it is possible to add only the function of inputting characters without obstructing other functions of IEEE1394 while using the functions of IEEE1394. Therefore, the keyboard input function can be realized at a low development cost.

  As described above, according to the present invention, characters can be easily input to the AV device using a keyboard, and a few command functions are implemented in a conventional AV device having a character input function. Thus, the present invention can be applied, and the development cost can be reduced.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a configuration diagram of a character input system according to an embodiment of the present invention, and FIG. 2 is an internal configuration diagram of each of a digital television 10 and a keyboard device 20 constituting the character input system.

  The character input system according to this embodiment includes a digital television 10 and a keyboard device 20 connected to the digital television 10 via an IEEE 1394 cable 31.

  In addition to receiving and outputting television broadcasts, the digital television 10 receives digital streaming data via an IEEE 1394 interface and outputs video and audio based on the streaming data. As shown in FIG. 2, the digital television 10 includes a controller 11 as a control unit that performs overall control of the apparatus, and a video processing unit 12 that processes video data and audio data and outputs a display signal to a display. A display unit 13 for outputting video, such as a plasma display, an interface unit 14 for performing signal processing and data processing of the IEEE 1394 standard, and an operation input unit 15 for receiving an operation input from a user.

  The controller 11 includes a decoder 11 a that converts a character input command code received by the interface unit 14 into a character code. The decoder 11a can be configured by hardware or software. The non-volatile memory in the controller 11 or the OSD (On Screen Display) processing unit 12a of the video processing unit 12 stores character font data. Based on the character code, the character font data corresponding to the character font data is stored. Is read out by the controller 11 or the OSD processing unit 12a and used for display control. For example, when the font data is overwritten in a predetermined area on the cursor in the frame data of the video, a video in which characters are displayed on the cursor is output to the display unit 13.

  As shown in FIG. 1, the keyboard device 20 has a large number of input keys formed on a board. The input keys include, for example, a plurality of input keys in which numbers, kana, alphabets, symbols, and the like are written and associated with these characters, function keys (F1 to F12, etc.) to which arbitrary functions can be assigned, input keys There are provided a switching key (shift, control, ALT, etc.) for switching any of a plurality of characters assigned to, a character type switching key for switching character types such as hiragana and katakana, and a movement key such as up / down / left / right. .

  As shown in FIG. 2, the keyboard device 20 includes a key input unit 22 that converts the operation of the input key into an electric signal and takes it in, and a plurality of LEDs that display an input mode switching state such as number lock and cap lock. And the like, an interface unit 24 that performs signal processing and data processing of the IEEE1394 standard, a controller 21 that performs overall control of the apparatus by exchanging signals with each block, and the like.

  The controller 21 is provided with an encoder 21a for converting the operation state of the input key into a predetermined command code. The encoder 21a can be configured by hardware or software.

  FIG. 3 shows a data chart representing the format of command codes transmitted / received via the IEEE 1394 interface.

  In the AV / C protocol, which is a higher standard of IEEE 1394, it is possible to mutually control operation between a plurality of devices by transmitting and receiving AV / C commands in the format shown in FIG.

  This command includes, for each byte from the beginning, a code (Type) indicating a command type, a subunit ID indicating a command issuance destination, an operation code indicating a command operation, and a plurality of operands (designating specific contents of the command [0] to [8]) are described in a linked form.

  The AV / C command does not define the contents of the command in advance, and a code space is provided in which each vendor can define the contents of the command independently. Commands defined in this code space are called vendor unique commands. In the character input system of this embodiment, a vendor unique command for character input is defined in this empty code space, and character input processing to the digital television 10 is performed.

  FIG. 4 shows a data chart of command codes for key input output from the keyboard device 20.

  The vendor unique command output from the keyboard device 20 when the input key is operated is as follows. That is, as shown in FIG. 4, after the byte code of the subunit ID of the AV / C command, "0x00" (0x is a symbol indicating a hexadecimal number) is set in the operation code and operand [0], and the subsequent 3 bytes A vendor ID for identifying the definition vendor is set in the operands [1] to [3]. These codes identify the command as a vendor unique command and which vendor defines it.

  Next, the operand [4] has an operation code indicating that it is an input command of the keyboard, and the operand [5] has a code indicating a key lock state (number lock, caps lock, etc.) at the time of operation. Is set with a code indicating the input key that has been input, and the operand [7] is set with a code indicating a sub key (shift key, control key, etc.) that is being pressed during the input operation, and a predetermined character is set. Vendor unique command representing input.

  This vendor unique command is generated by the encoder 21a according to a signal indicating the operation state of the key at the time when the input key is operated on the keyboard device 20, and transmitted to the outside via the interface unit 24. .

  In the digital television 10, when the vendor unique command is received while the character input process is being performed, the controller 11 interprets the vendor unique command and sends it to the decoder 11a, which the decoder 11a decodes. Convert to character code. The converted character code is handled as the character code input by the controller 11, and the character input process is advanced accordingly. For example, by such an input process, a title setting process of a recorded program is performed, and at the same time, a character display control process is performed in the controller 11 or the OSD processing unit 12a. It is displayed on the cursor inside.

  As described above, according to the character input system of this embodiment, there is an effect that it is possible to easily input characters using the keyboard in the AV device that accepts character input. If the AV device has an IEEE 1394 interface, a command function that uses a part of the vendor unique command as a character input command is implemented, and the character code output from the decoder during the character input process is A character input function using a keyboard can be realized simply by adding a program module to be read as input characters.

  The present invention is not limited to the above-described embodiment, and various modifications can be made. For example, a digital television capable of displaying and outputting characters is illustrated as an AV device that accepts character input. However, various AV devices such as a recording / playback device and a tuner device connected to a display via a cable may be applied. I can do it.

  In addition, the details specifically shown in the embodiment, such as the internal configuration of the keyboard device and the AV device, the format of the command code indicating the character input, and the like can be changed as appropriate without departing from the spirit of the invention.

It is a figure which shows the structural example of the character input system of embodiment of this invention. It is a block diagram which shows the internal structure of the digital television and keyboard apparatus which comprise a character input system. It is a figure explaining the format of the command code of IEEE1394 standard. It is a data chart which shows the example of a format of the command code of key input.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10 Digital television 11 Controller 11a Decoder 12 Video processing part 13 Display 14 Interface part 20 Keyboard apparatus 21 Controller 21a Encoder 22 Key input part 24 Interface part 31 Cable

Claims (4)

  1. IEEE 1394 standard interface;
    A plurality of input keys each of which is associated with a plurality of characters and generates an input signal based on an operation;
    Any one of the input signal representing the operation state of the plurality of input keys and the code range that is reserved as a vendor-definable code content out of the entire range of command codes supplied via the interface. An encoder that associates such a code and generates a command code corresponding to the input signal based on the input signal;
    Command issuing means for transmitting a command code generated by the encoder based on the operation of the plurality of input keys to the outside via the interface;
    A keyboard device having:
    IEEE 1394 standard interface;
    A decoder for converting a command code included in code data sent from the keyboard device into a character code corresponding to an operation state of the plurality of input keys;
    Control means for performing character input processing corresponding to the code based on the character code obtained by the decoder;
    An AV device having
    The command code generated by the encoder includes a first code indicating a key input operation, a second code indicating a key in a key lock state, a third code indicating a key that has been input, and an input operation A character input system including a fourth code indicating a key that has been pressed at the time.
  2. An interface capable of transmitting and receiving code data of a predetermined standard;
    A plurality of input keys each of which is associated with a plurality of characters and generates an input signal based on an operation;
    Corresponds to an input signal indicating the operation state of the plurality of input keys and any code included in a code range in which the code contents are not defined in the standard out of the entire range of command codes supplied via the interface An encoder that generates a command code corresponding to the input signal based on the input signal;
    Command issuing means for transmitting a command code generated by the encoder based on the operation of the plurality of input keys to the outside via the interface;
    A keyboard device having:
    An interface capable of transmitting and receiving the code data of the predetermined standard;
    A decoder for converting a command code included in code data sent from the keyboard device into a character code corresponding to an operation state of the plurality of input keys;
    Control means for performing character input processing corresponding to the code based on the character code obtained by the decoder;
    A character input system comprising an AV device having
  3.   The command code generated by the encoder includes a first code indicating a key input operation, a second code indicating a key in a key lock state, a third code indicating a key that has been input, and an input operation The character input system according to claim 2, further comprising: a fourth code indicating a key that has been pressed at the time.
  4. The interface is an interface conforming to the IEEE 1394 standard,
    The command code generated by the encoder is a vendor unique command included in a code range that is secured so that the vendor can define the content of the code, and the first code to the fourth code are included in the operand of the vendor unique command. The character input system according to claim 3, further comprising a code.
JP2004173408A 2004-06-11 2004-06-11 Character input system Withdrawn JP2005352805A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2004173408A JP2005352805A (en) 2004-06-11 2004-06-11 Character input system

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Application Number Priority Date Filing Date Title
JP2004173408A JP2005352805A (en) 2004-06-11 2004-06-11 Character input system

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009157814A (en) * 2007-12-27 2009-07-16 Canon Inc Broadcast receiver, control method therefor
US20120185631A1 (en) * 2011-01-13 2012-07-19 Prolific Technology Inc. Operation method for a computer system

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009157814A (en) * 2007-12-27 2009-07-16 Canon Inc Broadcast receiver, control method therefor
US20120185631A1 (en) * 2011-01-13 2012-07-19 Prolific Technology Inc. Operation method for a computer system
US8838866B2 (en) * 2011-01-13 2014-09-16 Prolific Technology Inc. Operation method for a computer system

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Effective date: 20060915