WO2018163358A1 - Dispositif électronique et procédé d'affichage - Google Patents

Dispositif électronique et procédé d'affichage Download PDF

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Publication number
WO2018163358A1
WO2018163358A1 PCT/JP2017/009509 JP2017009509W WO2018163358A1 WO 2018163358 A1 WO2018163358 A1 WO 2018163358A1 JP 2017009509 W JP2017009509 W JP 2017009509W WO 2018163358 A1 WO2018163358 A1 WO 2018163358A1
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WO
WIPO (PCT)
Prior art keywords
signal
electronic device
edid
setting information
acquisition unit
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Application number
PCT/JP2017/009509
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English (en)
Japanese (ja)
Inventor
博志 砂流
Original Assignee
Ｎｅｃディスプレイソリューションズ株式会社
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 Ｎｅｃディスプレイソリューションズ株式会社 filed Critical Ｎｅｃディスプレイソリューションズ株式会社
Priority to PCT/JP2017/009509 priority Critical patent/WO2018163358A1/fr
Priority to JP2019504226A priority patent/JP6884199B2/ja
Publication of WO2018163358A1 publication Critical patent/WO2018163358A1/fr

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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G5/00—Control arrangements or circuits for visual indicators common to cathode-ray tube indicators and other visual indicators
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/40—Client devices specifically adapted for the reception of or interaction with content, e.g. set-top-box [STB]; Operations thereof
    • H04N21/43—Processing of content or additional data, e.g. demultiplexing additional data from a digital video stream; Elementary client operations, e.g. monitoring of home network or synchronising decoder's clock; Client middleware
    • H04N21/436—Interfacing a local distribution network, e.g. communicating with another STB or one or more peripheral devices inside the home

Definitions

  • the present invention relates to an electronic device, and more particularly to an electronic device operating as a sink device (Sink) serving as a signal receiving side connected to a source device serving as a signal transmitting side, and a display method performed by the electronic device.
  • a sink device Sink
  • AV signal audio visual signal, ter, etc.
  • the source device is connected to a sink device such as a projector that performs display using the supplied video signal by a cable.
  • the sink device holds the data of the sink device itself called EDID (Extended Display Identification Data), the data corresponding to the function and performance, and the source device.
  • EDID is transmitted to the source device.
  • the source device refers to the EDID sent from the sink device and outputs an AV signal suitable for the sink device.
  • FIG. 1 is a diagram showing processing in a time series when a source device and a sink device are connected.
  • the connection process shown in FIG. 1 starts when the source device supplies +5 V to the video receiver of the sink device connected to the source device.
  • the + 5V supply is performed through a + 5V dedicated line in the HDMI cable connecting the source device and the sink device, and + 5V is supplied to the video reception unit in the sink device.
  • the video receiver of the sink device starts operating with this + 5V power supply.
  • the sink device prepares to receive an AV signal such as reading its own EDID stored in a nonvolatile memory (for example, a static random access memory (SRAM)).
  • SRAM static random access memory
  • the source device determines that a sink device capable of receiving a video signal is connected when HPD becomes H.
  • the source device that has determined that the sink device is connected requests the sink device to transmit EDID through a DDC / CI (Display Data Channel / Command Interface) line in the HDMI cable in order to select a video signal to be output.
  • the sink device transmits EDID according to this instruction, and the source device outputs an AV signal suitable for the sink device indicated by the received EDID.
  • DDC or CEC Consumer Electronics Control
  • the sink device is not turned on when this connection process is performed, the EDID recorded in the nonvolatile memory cannot be transmitted.
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2007-079980
  • the sink device causes the source device to execute EDID acquisition processing again.
  • video data and audio data are received from the source device, it is determined whether or not EDID description data has been received. If it is determined that data outside the EDID description has been received, Is turned off and then hot plug is turned on.
  • the sink device displays video and reproduces audio according to the AV signal sent from the source device. These video display and audio reproduction are also processed into AV signals in accordance with control signals sent from the source device.
  • the control signal indicates the control information set in the source device according to the setting input to the source device body or the setting input to the remote control device that operates the operation of the source device.
  • a control signal corresponding to the information is transmitted to the sink device.
  • An example of AV signal processing by control information is that the sound is muted (MUTE) in the case of audio, and in the case of display, subtitles are turned on / off and the brightness and hue of the displayed video are adjusted.
  • the display image may be displayed in a black display state.
  • the source device when the sink device receives data outside of the EDID description, the source device retransmits the EDID by turning off and on the hot plug, and conforms to the sink device standard. Although it is configured to receive an AV signal, the source device is in a reset state when receiving a hot plug and requesting EDID transmission. For this reason, the user of the source device needs to set control information again after transmitting an AV signal corresponding to the retransmitted EDID, which is troublesome.
  • the present invention is normal while maintaining the state according to the control information so far when an audio reproduction or video display abnormality is caused by AV data not conforming to the reception standard of the sink device being sent from the source device to the sink device.
  • An electronic device and a display method for resuming sound reproduction or video display are realized.
  • the electronic device is connected to a source device that requests EDID transmission according to the state of the hot plug detection line and transmits an AV signal according to the transmitted EDID and a control signal indicating setting information for the AV signal.
  • An electronic device that performs audio reproduction and video display according to the AV signal and the control signal A parameter acquisition unit for acquiring various parameters of the AV signal; An AV setting information acquisition unit for acquiring the setting information; If the various parameters acquired by the parameter acquisition unit do not correspond to the EDID, the state of the hot plug detection line is changed to request the source device to transmit the EDID, and then sent A control unit that performs audio reproduction and video display according to setting information acquired by the AV information acquisition unit when performing audio reproduction and video display using the AV signal.
  • the display method according to the present invention is connected to a source device that requests EDID transmission according to the state of the hot plug detection line and transmits an AV signal according to the transmitted EDID and a control signal indicating setting information for the AV signal.
  • the source device is requested to transmit the EDID, and the transmitted AV signal is transmitted thereafter.
  • audio reproduction and video display audio reproduction and video display according to the acquired setting information are performed.
  • FIG. 2 is a block diagram showing the main configuration of an embodiment of the electronic apparatus according to the present invention.
  • the present embodiment includes a PC 1 as a source device and a projector 18 as a sink device, which is an electronic device according to the present invention.
  • the PC 1 is provided with a graphic board 2.
  • the projector 18 is provided with a digital signal processing unit 6 and a control unit 17.
  • the digital signal processing unit 6 includes a hot plug detection unit 7, a hot plug control unit 8, a DDC / CI communication unit 9, and an AV signal decoding unit 10, and the control unit 17 includes a hot plug detection processing unit 14, A hot plug control processing unit 15, an AV signal abnormality determination processing unit 16, and an AV setting information processing unit 20 are provided.
  • the AV signal decoding unit 10 is provided with an AV signal first acquisition unit 11, an AV signal second acquisition unit 12, an AV signal nth acquisition unit 13, and an AV setting information acquisition unit 19.
  • the graphic board 2 and the digital signal processing unit 6 are connected by a hot plug detection line 3, a DDC / CI communication line 4, and a video / audio signal line 5. These are provided in an HDMI cable (not shown), and the graphic board 2 and the digital signal processing unit 6 are actually connected by the HDMI cable.
  • the projector 18 is provided with a configuration for reproducing audio, a projection optical system for projecting video, and a storage unit for storing EDID. Since it has a typical configuration and is not particularly involved in the operation of the present invention, illustration and description thereof are omitted.
  • the hot plug detection line 3 is pulled up to the power source inside the PC 1 on the PC 1 side, and the projector 18 side which is a sink device controls the H (High) / L (Low) level.
  • the DDC / CI communication line 4 is used when exchanging EDID.
  • the digital signal processing unit 6 performs hot plug detection, hot plug control, DDC / CI communication, and decoding of AV signals including audio signals and video signals.
  • the hot plug control unit 8 controls the H / L state of the hot plug detection line 3 to the graphic board 2 of the PC 1, and the hot plug detection unit 7 detects the hot plug detection line 3 to the graphic board 2 of the PC 1.
  • the detection result is output to the hot plug detection processing unit 14.
  • the DDC / CI communication unit 9 exchanges HDMI authentication and EDID with the graphic board 2 of the PC 1 via the DDC / CI communication line 4.
  • the AV signal decoding unit 10 decodes the AV signal transmitted via the video / audio signal line 5 to obtain a video signal and an audio signal.
  • the AV signal first acquisition unit 11, the AV signal second acquisition unit 12, and the AV signal nth acquisition unit 13 acquire various parameters constituting the video signal and the audio signal obtained by decoding. Although only three acquisition units are shown in FIG. 2, the configuration is provided corresponding to various parameters of the audio signal and the video signal, and more acquisition units are actually provided.
  • the AV setting information acquisition unit 19 acquires setting information indicated by a control signal transmitted from the graphic board 2 of the PC 1 via the video / audio signal line 5.
  • the AV setting information processing unit 20 provided in the control unit 17 stores the setting information acquired by the AV setting information acquiring unit 19.
  • the AV signal abnormality determination processing unit 16 serves as a parameter acquisition unit of the audio signal and the video signal obtained by the AV signal first acquisition unit 11, the AV signal second acquisition unit 12, and the AV signal nth acquisition unit 13. It is determined whether or not the AV signal is abnormal by checking whether the various parameters comply with EDID, and the determination result is output to the hot plug control processing unit 15.
  • the hot plug control processing unit 15 When receiving the notification that the AV signal is abnormal from the AV signal abnormality determination processing unit 16, the hot plug control processing unit 15 causes the hot plug control unit 8 to set the hot plug detection line to H.
  • the hot plug detection processing unit 14 sends the detection result of the hot plug detection line 3 from the hot plug detection unit 7 to the hot plug control processing unit 15, and the hot plug control processing unit 15 thereby transmits the state of the hot plug detection line 3. Confirm.
  • the AV signal first acquisition unit 11, the AV signal second acquisition unit 12, and the AV signal nth acquisition unit 13 acquire various parameters of the audio signal and the video signal, and the AV signal abnormality determination processing unit 16 Confirms whether the acquired various parameters comply with EDID.
  • the AV setting information processing unit 20 stores setting information. Various types of parameters and setting information to be acquired can be considered and are not particularly limited. However, in order to facilitate understanding, in the following description, the AV signal first acquisition unit 11 is configured to store an audio signal.
  • the AV signal second acquisition unit 12 acquires the frequency, detects the presence or absence of the audio Info Frame, the AV signal n-th acquisition unit 13 acquires the bit width of the audio signal, and the AV signal abnormality determination processing unit 16 It will be described that it is confirmed whether these comply with EDID, and the AV setting information processing unit 20 stores AV MUTE as setting information.
  • the sound is muted (MUTE), and the display video is set to the entire black display state (video / audio MUTE is turned ON).
  • video / audio input from an external device PC1 or the like
  • the display image may not be entirely black, but an image generated based on data stored in the projector 18 may be displayed.
  • an HDMI signal is output from the graphic board 2 of the PC 1, and the hot plug detection line 3, the DDC / CI communication line 4, and the video / audio signal line 5 are connected to the projector 18 via an HDMI cable. .
  • the PC 1 outputs an HDMI video / audio signal with AV MUTE information turned ON to the video / audio signal line 5.
  • the hot plug detection unit 7 detects “H”.
  • the hot plug detection processing unit 14 recognizes that the source device is connected, and notifies the hot plug control processing unit 15 of it.
  • the hot plug control processing unit 15 Upon receiving the notification from the hot plug detection processing unit 14, the hot plug control processing unit 15 instructs the hot plug control unit 8 to perform hot plug lowering. Upon receiving the instruction, the hot plug control unit 8 lowers the hot plug.
  • the graphic board 2 detects that the hot plug is lowered, the graphic board 2 acquires the supported resolution, supported refresh rate information, and the like of the projector 18 using the DDC / CI communication line 4, and further performs the HDMI authentication and the supported resolution and the supported resolution. A signal corresponding to the refresh rate is output.
  • the projector 18 When an HDMI signal video / audio is input from the signal video / audio line 5 output from the PC 1, the projector 18 performs signal discrimination, obtains an input signal resolution, an input refresh rate, and the like, displays the video, and outputs audio. For this, the optimum setting is set in the hardware inside the projector 18. Further, the projector 18 periodically acquires the presence / absence of the audio INFO FRAME added to the HDMI video / audio signal and the audio BIT width information in the audio INFO FRAME.
  • FIG. 3 is a flowchart showing a control operation periodically performed by the control unit 17 when the PC 1 and the projector 18 are connected by the HDMI cable.
  • the projector 18 acquires AV MUTE information in the HDMI video / audio signal received by the AV setting information acquisition unit 19 and stores it in the AV setting information processing unit 20.
  • the video / audio MUTE is turned ON (step 31).
  • the AV signal abnormality determination processing unit 16 confirms whether or not [the audio frequency (Freq) is not specified] based on the audio Freq and audio INFOFRAME information acquired periodically (step 32), and [audio INFO Whether or not FRAME is present] is confirmed (step 33), and whether or not [sound BIT width information is other than a prescribed value] is confirmed (step 34).
  • the audio frequency is a reference frequency (such as a clock frequency) used when reproducing audio.
  • the frequency may correspond to a sampling frequency used when converting an analog audio signal into a digital audio signal.
  • the audio frequency is 44.1 kHz / 48 kHz / 32 kHz / 88.2 kHz / 768 kHz / 96 kHz / 176.4 kHz / 192 kHz / 64 kHz / 128 kHz / 256 kHz / 512 kHz / 1024 kHz / 352.8 kHz / 705.6 kHz / 1411.2 kHz / Whether it is other than 384 kHz / 1536 kHz is confirmed.
  • step 34 it is confirmed whether the voice BIT width information in the voice INFO FRAME is other than 16 bits / 18 bits / 20 bits / 24 bits.
  • the process returns to step 31, otherwise.
  • the AV abnormality determination processing unit 16 determines that the AV signal is in an abnormal state. At this time, since the voice packet or the voice INFOFRAME information is in an abnormal state, the voice output from the projector 18 is in a state where no abnormal sound or voice is output. Since the abnormal state is determined as described above, the hot plug is lowered. At this time, the video / audio output is reset in the source device due to the hot plug lowering. In order to make no sound, the AV signal abnormality determination processing unit 16 turns on the video / audio MUTE (step 35).
  • the hot plug control processing unit 15 is instructed to lower the hot plug (step 36), and the hot plug control unit 8 lowers the hot plug.
  • the video / audio output is reset when the hot plug is lowered.
  • the projector 18 performs signal redetermination (step 37).
  • the stored AV setting information is confirmed (step 38).
  • the video / audio MUTE is continued (step 39).
  • the video / audio MUTE is turned off (step 40).
  • the HDMI cable is set by causing the source device to reset the output by lowering the hot plug on the sink device side.
  • the operation is equivalent to plugging and unplugging, and audio is automatically output.
  • the abnormal state can be automatically resolved while maintaining the AV MUTE state. If the voice packet is in an abnormal state even after the hot plug is lowered, the hot plug is lowered indefinitely. In order to avoid such a situation, if the voice packet continues to be in an abnormal state even after a predetermined number of times, it may not be raised.
  • the audio signal includes the audio frequency, the presence / absence of audio INFO FRAME, and audio BIT width information as various parameters of the AV signal.
  • the AV signal abnormality determination unit 16 may determine whether the AV signal (video signal) is abnormal based on these parameters.
  • the projector 18 is described as the sink device.
  • the present invention is not limited to this, and a display device such as a display or a television may be used.

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Controls And Circuits For Display Device (AREA)

Abstract

La présente invention concerne un dispositif électronique qui, lorsqu'une anomalie se produit dans une reproduction audio ou un affichage vidéo en raison de la transmission d'un dispositif source à un dispositif récepteur de données audiovisuelles non conforme à la norme de réception du dispositif récepteur, reprend une reproduction audio normale ou un affichage vidéo tout en maintenant un état correspondant à des informations de commande précédentes, le dispositif électronique comprenant : une unité d'acquisition de paramètre pour acquérir divers paramètres d'un signal AV; une unité d'acquisition d'informations de réglage AV pour acquérir des informations de réglage; et une unité de commande pour, si les divers paramètres acquis par l'unité d'acquisition de paramètres ne correspondent pas à EDID, changer l'état d'une ligne de détection de connexion à chaud et amener le dispositif source à demander la transmission des EDID, et au moment de la reproduction audio et de l'affichage vidéo à l'aide d'un signal AV envoyé par la suite, réaliser la reproduction audio et l'affichage vidéo en fonction des informations de réglage acquises par l'unité d'acquisition d'informations audiovisuelles.
PCT/JP2017/009509 2017-03-09 2017-03-09 Dispositif électronique et procédé d'affichage WO2018163358A1 (fr)

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PCT/JP2017/009509 WO2018163358A1 (fr) 2017-03-09 2017-03-09 Dispositif électronique et procédé d'affichage
JP2019504226A JP6884199B2 (ja) 2017-03-09 2017-03-09 電子機器および表示方法

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022014005A1 (fr) * 2020-07-16 2022-01-20 シャープＮｅｃディスプレイソリューションズ株式会社 Dispositif électronique et procédé de vérification de connexion

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060031895A1 (en) * 2004-08-05 2006-02-09 Kwon Kwang H Digital cable TV receiver, diagnosis method for the same, and data structure of HDMI status report
JP2007124552A (ja) * 2005-10-31 2007-05-17 Matsushita Electric Ind Co Ltd 音声出力システムの制御方法及び音声出力システム
JP2010028454A (ja) * 2008-07-18 2010-02-04 Sony Corp コンテンツ出力装置およびコンテンツ出力方法、並びにプログラム
JP2012199643A (ja) * 2011-03-18 2012-10-18 Panasonic Corp 通信制御システム、及びシンク機器

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2006146048A (ja) * 2004-11-24 2006-06-08 Canon Inc 投射型プロジェクタ
JP2014204389A (ja) * 2013-04-09 2014-10-27 株式会社東芝 電子機器
JP2017009783A (ja) * 2015-06-22 2017-01-12 Ｎｅｃディスプレイソリューションズ株式会社 マルチ表示システム、映像表示機器、映像表示機器における表示不具合発生防止方法とプログラム

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20060031895A1 (en) * 2004-08-05 2006-02-09 Kwon Kwang H Digital cable TV receiver, diagnosis method for the same, and data structure of HDMI status report
JP2007124552A (ja) * 2005-10-31 2007-05-17 Matsushita Electric Ind Co Ltd 音声出力システムの制御方法及び音声出力システム
JP2010028454A (ja) * 2008-07-18 2010-02-04 Sony Corp コンテンツ出力装置およびコンテンツ出力方法、並びにプログラム
JP2012199643A (ja) * 2011-03-18 2012-10-18 Panasonic Corp 通信制御システム、及びシンク機器

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2022014005A1 (fr) * 2020-07-16 2022-01-20 シャープＮｅｃディスプレイソリューションズ株式会社 Dispositif électronique et procédé de vérification de connexion
JPWO2022014005A1 (fr) * 2020-07-16 2022-01-20
JP7371260B2 (ja) 2020-07-16 2023-10-30 シャープＮｅｃディスプレイソリューションズ株式会社 電子機器、及び接続検査方法

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JP6884199B2 (ja) 2021-06-09

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