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Method and device for transmitting key operation information and transmission-reception system
| Details |
Inventors: Asari, Naosuke; Takashima, Koji; Ishigaki, Masanori; Ueki, Toshihisa;
Assignee: Sony Corporation (Tokyo, JP); Sony-Kihara Research Center, Inc. (Tokyo, JP)
Primary Examiner: Horabik; Michael
Assistant Examiner: Wong; Albert K.
Attorney, Agent or Firm: Frommer Lawerence & Haug, LLP, Frommer; William S.
An IR keyboard 1 generates key code information corresponding to key operated to add break flag information indicating distinction between in-operation and operation release to the key code information as operation status information of the key to add terminator code information indicating that the key code information corresponding to key operation every once is completed to the last portion of the key code information to transmit, as key operation information, the key code information, the break flag information and the key code information by an infrared ray signal from a light emitting unit 11. Further, a light receiving unit 2 receives the infrared ray signal transmitted from the light emitting unit 11 to input key operation information of the IR keyboard 1 to a computer unit 3. At the light receiving unit 2, a control is conducted such that in the case where receive signal is ceased to be received in the state where break flag information added to key code information included in the infrared ray signal transmitted from the light emitting unit 11 of the IR keyboard 1 indicates that the key is being operated, when clocking operation starts from the time point of occurrence of fault and a receive signal can be obtained within a predetermined time, the receive signal is considered to be continuously received. |
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DETAILED DESCRIPTION OF THE INVENTION According to this invention, a method for transmitting key operation information comprises the steps of: generating key code information corresponding to a key operated; adding break flag information indicating a distinction between the operation status of "in operation" or "operation release" in the key code information, adding terminator code information indicating that the key code information corresponding to the key operation is completed to the last portion of the key code information to which the break flag information has been added; and transmitting, as key operation information, the key code information, the break flag information and the key code information.
In accordance with the transmitting method for key operation information according to this invention, e.
g.
, the key operation information is transmitted in packet units.
Moreover, in the transmitting method for key operation information according to this invention, the key operation information may include, e.
g.
, code information of multiple key codes simultaneously operated and break flag information added to the respective key code information.
A transmitting apparatus for transmitting key operation information according to this invention comprises: means for generating key operation information corresponding to a key operated, means for adding break flag information indicating the operation status of the key as either in-operation or operation release, means for adding terminator code information indicating that the key code information corresponding to key operation is completed to the last portion of the key code information to which the break flag information has been added; and transmitting means for transmitting, as a transmit signal, the key operation information generated by the key operation information generating means.
In the transmitting apparatus for key operation information according to this invention, the transmitting means is of a structure comprising, e.
g.
, infrared ray transmitting means for transmitting and outputting the transmit signal as an infrared ray signal
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