EP0091619A2 - Fernsteuereinrichtung - Google Patents

Fernsteuereinrichtung Download PDF

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Publication number
EP0091619A2
EP0091619A2 EP83103205A EP83103205A EP0091619A2 EP 0091619 A2 EP0091619 A2 EP 0091619A2 EP 83103205 A EP83103205 A EP 83103205A EP 83103205 A EP83103205 A EP 83103205A EP 0091619 A2 EP0091619 A2 EP 0091619A2
Authority
EP
European Patent Office
Prior art keywords
signal
control device
remote control
generating
generation means
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Withdrawn
Application number
EP83103205A
Other languages
English (en)
French (fr)
Other versions
EP0091619A3 (de
Inventor
Yoshitake Nagashima
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Corp
Original Assignee
Toshiba Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Corp filed Critical Toshiba Corp
Publication of EP0091619A2 publication Critical patent/EP0091619A2/de
Publication of EP0091619A3 publication Critical patent/EP0091619A3/de
Withdrawn legal-status Critical Current

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Classifications

    • G—PHYSICS
    • G08—SIGNALLING
    • G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
    • G08C19/00—Electric signal transmission systems
    • G08C19/16—Electric signal transmission systems in which transmission is by pulses
    • G08C19/28—Electric signal transmission systems in which transmission is by pulses using pulse code

Definitions

  • the present invention relates to a remote control device which is used for remote-controlling, for example, the channel selection, volume, contrast and so on of a television receiver and which uses a battery as a transmitter power source.
  • a conventional remote control device which includes a transmitter for generating an energy signal such as light or an ultrasonic wave.
  • the energy signal is modulated on the basis of binary coded data generated in accordance with control data which is to be transmitted and a receiver which receives the energy signal transmitted from the transmitter.
  • the receiver obtains the control data by decoding the energy signal and then supplies the decoded control data as a control signal to a controlled device such as a television receiver or the like.
  • method (1) when method (1) is adopted, the service life of the battery used as a power source for the transmitter is shortened.
  • method (2) since the output energy signals, each corresponding to the single control data, are successively transmitted, the data transfer efficiency is degraded.
  • method (3) when method (3) is adopted, a checking function and an error correction function are required for the receiver, thus complicating the construction of the receiver.
  • an object of the present invention to provide a remote control device which can perform control data transfer with high reliability without requiring an increase of transmission output power.
  • a remote control device comprises transmitting means and receiving means which are arranged separately from each other.
  • the transmitting means is driven by a battery and has code series data generating means for generating code series data which includes at least one code series whose autocorrelation function has a single sharp peak.
  • the transmitting means also has energy signal generation means which generates an energy signal modulated in accordance with the code series data transferred from the code series data generation means.
  • the receiving means has converting means which receives the energy signal supplied from the energy signal generation means and converts it to corresponding code series data.
  • the receiving means also has an autocorrelation function generating circuit which receives the code series data supplied from the converting means and generates an output signal in accordance with an autocorrelation function of the received code series data.
  • the autocorrelation function of the code series included in the code series data which is supplied by the code series data generating means has a single sharp peak. Accordingly, the autocorrelation function generating circuit generates a peak pulse signal in accordance with the code series data. This enables generation of a reliable remote control signal without increasing the power of an output from the transmitting means and without being adversely affected by noise.
  • Fig. 1 is a block diagram showing a remote control device used for controlling, for example, the channel selection, volume, contrast and so on of a television receiver, according to an embodiment of the present invention.
  • the remote control device includes a transmitter 10 which is driven by a battery E for generating a light signal and a receiver 20 which generates a control signal in correspondence with the light signal from the transmitter 10.
  • the transmitter 10 includes a keyboard 12 having channel selecton keys, a volume control switch, a contrast control switch and so on; an encoder 14 for converting a control signal from the keyboard 12 into, e.g., 8-bit binary code; a Barker series generating circuit 16 for generating a Barker series whose autocorrelation function has a single sharp peak in correspondence with a "1" bit having a high level included in the binary code supplied from the encoder 14; and a light-emitting diode 18 for generating a light signal which is modulated in accordance with the Barker series supplied from the Barker series generating circuit 16.
  • an encoder 14 for converting a control signal from the keyboard 12 into, e.g., 8-bit binary code
  • a Barker series generating circuit 16 for generating a Barker series whose autocorrelation function has a single sharp peak in correspondence with a "1" bit having a high level included in the binary code supplied from the encoder 14
  • the receiver 20 includes a photodiode 22 for converting a light signal from the light-emitting diode 18 into an electric signal; an amplifier circuit 24 for amplifying and wave-shaping the electric signal obtained by the photodiode 22; an autocorrelation function generating circuit 26 formed of, for example, a charge coupled device for calculating the autocorrelation function of an output signal supplied from the amplifier circuit 24; and a decoder 28 for decoding an autocorrelation function signal supplied from the autocorrelation function generating circuit 26 and for supplying the same as a control signal to a television receiver (not shown).
  • a circuit which generates a 2-, 3-, 4-, 5-, 7-, 11- or 13-bit Barker series in response to a single pulse can be used as the Barker series generating circuit 16.
  • a circuit which generates a 13-bit Barker series is adopted.
  • the Barker series generating circuit 16 generates a Barker series having 13 bits of "1", “1", “1”, “1”, “1”, “0”, “0”, “1", “1”, “0”, “1", “0” and “1” in accordance with, for example, "1"-bit data having a logic level "1" supplied from the encoder 14.
  • the Barker series generating circuit 16 generates a Barker series every time the output bit from the encoder 14 is set to logic level "1", as shown in Fig. 2B.
  • the duration corresponding to each bit in the Barker series is T and the duration corresponding to the entire length of each Barker series is 13T.
  • the autocorrelation function generating circuit 26 generates an autocorrelation function ⁇ (t) of the input signal X(t) calculated according to the following equation:
  • X(t) represents a Barker series in the present .embodiment and is given by
  • the autocorrelation function generating circuit 26 generates the autocorrelation function ⁇ (t) shown in Fig. 3B upon receiving the Barker series X(t) shown in Fig. 3A.
  • the keyboard 12 is operated to generate a control signal for performing desired control at the television receiver.
  • the encoder 14 converts the control signal into corresponding binary coded data.
  • the Barker series generating circuit 16 generates a Barker series in response to each "1"-bit signal at high level included in the binary coded data supplied from the encoder 14, in a manner explained with reference to Figs. 2A and 2B.
  • the light-emitting diode 18 is intermittently biased according to the Barker series supplied from the Barker series generating circuit 16 and generates light which is modulated in accordance with the Barker series.
  • the photodiode 22 Upon receiving the light supplied from the light-emitting diode 18, the photodiode 22 causes a current corresponding to the intensity of the light to be supplied to the amplifier 24. Therefore, the amplifier 24 generates Barker series data corresponding to the Barker series data supplied from the Barker series generating circuit 16, that is, the Barker series data shown in Fig. 2B. The generated Barker series data is supplied to the autocorrelation function generating circuit 26. In a manner explained with reference to Figs. 3A and 3B, the autocorrelation function generating circuit 26 generates an autocorrelation function having a single sharp peak as shown in Fig. 3B every time it receives a Barker series.
  • the decoder 28 detects a peak pulse component or components included in an output signal from the autocorrelation function generating circuit 26 and supplies a corresponding control signal to the television receiver (not shown).
  • the output power from the transmitter 10 can be decreased provided the light signal is transmitted from the light-emitting diode 18 to the photodiode 22 and then the autocorrelation function generating circuit 26 generates an output signal including at least one peak pulse component which can be separated and detected as a logic signal of "1". Furthermore, even if the S/N ratio of the light signal transmitted from the transmitter 18 is OdB or lower, a peak pulse component having a level high enough to be detected by the decoder 28 can be generated by the autocorrelation function generating circuit 26. For example, in an experiment wherein an input signal whose S/N ratio was -lldB, as shown in Fig. 4A, was supplied to the autocorrelation function generating circuit 26, an autocorrelation function signal including a peak pulse component which could be separated and detected, as shown in Fig. 4B, was produced.
  • the present invention has been described above with reference to a particular embodiment, it is to be understood that the present invention is not limited to this embodiment.
  • the light-emitting diode 18 and the photodiode 22 are used for transmitting the light signal from the transmitter 10 to the receiver 20.
  • another type of energy signal can be substituted for the light signal.
  • a remote control device using an ultrasonic signal shown in Fig. 5 is similar to that shown in Fig. 1 except that the device in Fig. 5 uses electroacoustic transducers 19 and 23 each formed of a piezoelectric element in place of the light-emitting diode 18 and the photodiode 22.
  • an ultrasonic signal is produced by the transducer 19 and then transmitted to the transducer 23, where it is converted into an electric signal.
  • the Barker series generating circuit 16 generates the Barker series in accordance with "1"-bit signals at a logic "1" level supplied from the encoder 14.
  • the configuration of the device can be changed such that the Barker series generating circuit 16 generates the Barker series in accordance with "0"-bit signals supplied from the encoder 14.

Landscapes

  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Selective Calling Equipment (AREA)
  • Optical Communication System (AREA)
  • Details Of Television Systems (AREA)
EP83103205A 1982-04-08 1983-03-30 Fernsteuereinrichtung Withdrawn EP0091619A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP57058549A JPS58175396A (ja) 1982-04-08 1982-04-08 リモコン装置
JP58549/82 1982-04-08

Publications (2)

Publication Number Publication Date
EP0091619A2 true EP0091619A2 (de) 1983-10-19
EP0091619A3 EP0091619A3 (de) 1985-09-04

Family

ID=13087534

Family Applications (1)

Application Number Title Priority Date Filing Date
EP83103205A Withdrawn EP0091619A3 (de) 1982-04-08 1983-03-30 Fernsteuereinrichtung

Country Status (2)

Country Link
EP (1) EP0091619A3 (de)
JP (1) JPS58175396A (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2574201A1 (fr) * 1984-11-30 1986-06-06 Cit Alcatel Procede et dispositif de telesignalisation pour une liaison de transmission numerique
AU587398B2 (en) * 1984-10-02 1989-08-17 Sony Corporation Remote control apparatus
EP0343570A1 (de) * 1988-05-26 1989-11-29 Ascom Autophon Ag Verfahren zur Authentifikation einer Punkt-Punkt-Verbindung in einem Mehrbenützer-Kommunikationssystem
US10236990B2 (en) 2014-09-18 2019-03-19 Interdigital Ce Patent Holdings Adding a keypad to a device configured with a wireless receiver

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2515441B2 (ja) * 1991-04-25 1996-07-10 三田工業株式会社 画像形成装置

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1565203A (en) * 1975-07-25 1980-04-16 Pico Electronics Ltd Remote control systems
US4099163A (en) * 1976-03-29 1978-07-04 The Magnavox Company Method and apparatus for digital data transmission in television receiver remote control systems
US4290143A (en) * 1979-04-19 1981-09-15 Cincinnati Electronics Corporation Transmission method and apparatus wherein binary data bits are converted into barker words and vice versa

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
AU587398B2 (en) * 1984-10-02 1989-08-17 Sony Corporation Remote control apparatus
FR2574201A1 (fr) * 1984-11-30 1986-06-06 Cit Alcatel Procede et dispositif de telesignalisation pour une liaison de transmission numerique
EP0184109A1 (de) * 1984-11-30 1986-06-11 Alcatel Cit Verfahren und Anordnung zur Signalisierung für eine digitale Verbindungsleitung
US4727540A (en) * 1984-11-30 1988-02-23 Compagnie Industrielle Des Telecommications Cit-Alcatel Apparatus for remote signalling on a digital transmission link
EP0343570A1 (de) * 1988-05-26 1989-11-29 Ascom Autophon Ag Verfahren zur Authentifikation einer Punkt-Punkt-Verbindung in einem Mehrbenützer-Kommunikationssystem
US10236990B2 (en) 2014-09-18 2019-03-19 Interdigital Ce Patent Holdings Adding a keypad to a device configured with a wireless receiver

Also Published As

Publication number Publication date
EP0091619A3 (de) 1985-09-04
JPS58175396A (ja) 1983-10-14
JPS6358517B2 (de) 1988-11-16

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Inventor name: NAGASHIMA, YOSHITAKE