JP2012119934A - Electronic apparatus and control signal transmission method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus and a control signal transmission method having an enhanced usability of interlocking function with regard to a power control of a sink device for turning off the power when the electronic apparatus is connected to the sink device by an HDMI scheme.SOLUTION: An electronic apparatus connectable to an HDMI standard supporting sink device via an HDMI scheme, includes: determination means for determining whether the HDMI connection status with the sink device is active or inactive; and control means for transmitting power control signals to the sink device if the electronic apparatus is in active, and not transmitting the power control signals to the sink device if the electronic apparatus is in inactive, when turning off the electronic apparatus power while the HDMI connection is made with the sink device.

Description

  Embodiments described herein relate generally to an electronic device and a control signal transmission method that can be connected to a sink device such as a display device through a digital interface such as HDMI (High Definition Multimedia Interface) (registered trademark).

  In recent years, HDMI has become widespread as a digital interface standard for digital devices in the home. A system compliant with the HDMI standard is configured by connecting a source device that transmits video and audio signals and a sink device that receives video and audio signals via an HDMI cable. Conventionally, a plurality of cables for video signals and audio signals are used for connection between a display device and an external device. However, HDMI allows transmission using a single cable.

  In addition, the HDMI standard defines CEC (Consumer Electronics Control), which is a control protocol for bidirectionally transmitting mutual control signals between devices. For example, reception of video / audio signals from digital televisions, projectors, etc. By transmitting and receiving control signals to and from the source device on the video / audio signal supply side such as a STB (Set Top Box) or DVD (Digital Versatile Disc) recorder, It is also possible to control the operation of the entire system with a remote control (for example, a remote control of a digital television).

JP 2009-188727 A

  An interlocking function between devices connected by the CEC function has been realized. One of the functions is a system standby function. This function is a function that, for example, when the power supply of the sink device is turned off (off), the sink device issues a system standby command, and the HDMI-connected source device is also turned off in conjunction with it. You can prevent forgetting to turn off the source device. However, when a source device such as a recorder is continuing an operation such as recording, the power is not turned off. Note that the power is turned off means that the sink device or the source device is changed from the operating state to the standby state in detail. In addition, when the power is turned on, the standby state is changed to the operating state.

  Conversely, a function is also conceivable in which the sink device is turned off when the source device is turned off. However, when the other source device connected to the sink device is operating and the sink device receives the playback signal of the other active source device and is playing back the data, the sink device is turned off. It is inconvenient if you do it.

  The object of the present invention has been made in view of the above-described circumstances, and when the sink device is HDMI-connected, the usability of the interlock function related to the power control of the sink device is improved when the power is turned off. An electronic device and a control signal transmission method are provided.

  In order to achieve the above object, according to an embodiment, an electronic device is an electronic device that can be HDMI-connected to a sink device that conforms to a High Definition Multimedia Interface (HDMI) (registered trademark) standard. Determination means for determining whether the electronic device is in an active state or an inactive state, and when the electronic device is turned off when the sink device is HDMI connected, the electronic device is active Control means for transmitting a power control signal to the sink device when in a state, and not transmitting a power control signal to the sink device when in an inactive state.

The block diagram which shows an example of a structure of embodiment. The flowchart which shows an example of the operation | movement procedure of an active determination means. The flowchart which shows an example of the issuing operation | movement procedure of the command regarding power supply control. The perspective view which showed the external appearance of the optical disk recorder and digital television. The block diagram which showed the example of the structure of the optical disk recorder.

  Hereinafter, embodiments will be described with reference to the drawings. FIG. 1 is a block diagram illustrating an example of a system configuration according to the embodiment. A source device 1 and a sink device 6 are connected via an HDMI cable 10. Both ends of the HDMI cable 10 are connected to the HDMI terminal 5 of the source device 1 and the HDMI terminal 9 of the sink device 6.

  The source device 1 is, for example, a recording / playback device such as a DVD (Digital Versatile Disc) recorder, a BD (Blu-ray (registered trademark)) recorder, or a video / audio device such as a tuner, STB, DVD player, or BD player. An electronic device that transmits a signal.

  The source device 1 conforms to the HDMI standard and the HDMI CEC standard, and includes an HDMI CEC control unit 2, an active state determination unit 3, a power source control unit 4, and an HDMI terminal 5. The HDMI CEC control unit 2 performs control based on the HDMI standard, and performs communication with the sink device 6 connected to the HDMI terminal 5 using the HDMI CEC signal.

  The active state determination unit 3 is a determination unit that determines whether the source device 1 is in an active state or an inactive state when the source device 1 is HDMI-connected to the sink device 6. There are a plurality of states in which the source device 1 is determined to be active. For example, when the power switch of the source device 1 is turned on and the power is turned on (on), or the reproduction of data recorded on the recording medium is started. In this case, the active state is determined. An active control signal is transmitted between the active state determination unit 3 and the HDMI CEC control unit 2.

  The power control unit 4 performs power-related control including turning on / off the power of the source device 1. When the power is turned on / off from the power control means 4 to the HDMI CEC control means 2, an on / off power control signal is transmitted.

  The sink device 6 is a display device that receives and plays back a digital video / audio signal, such as a digital television or a display device. The sink device 6 conforms to the HDMI standard and the HDMI CEC standard, and includes an HDMI CEC control unit 7, a power source control unit 8, and an HDMI terminal 9. There may be a plurality of HDMI terminals 9 installed.

  The HDMI CEC control means 7 performs control based on the HDMI standard, and performs communication using the HDMI CEC signal with the source device 1 connected to the HDMI terminal 9. The power control unit 8 performs power-related control including turning on / off the power of the sink device 6. A plurality of source devices other than the source device 1 may be connected to the sink device 6.

  According to the HDMI standard, each source to which a RoutingChange command or SetStreamPath command is connected when the sink device 6 switches the input source device with one or more source devices connected to the sink device 6 Send to device.

  Here, if the address in the SetStreamPath command matches the address of the source device 1, the source device 1 becomes active and transmits the ActiveSource command to the sink device 6 and other source devices connected to the sink device 6. If the address in the SetStreamPath command does not match the address of the source device 1, the source device 1 becomes inactive.

  If the New address in the RoutingChange command is different from the address path of the source device, the source device 1 becomes inactive.

  When the video signal from the tuner of the sink device 6 is displayed on the screen of the sink device 6, the sink device 6 transmits an ActiveSource command to each connected source device. Further, when one of the source devices connected to the sink device 6 becomes active, an ActiveSource command is transmitted from the source device to the sink device 6 and each source device. When the sink device 6 receives the ActiveSource command, the sink device 6 switches the input destination to the source device that transmitted the ActiveSource command. When a source device other than the source device 1 enters an active state and the source device 1 receives an ActiveSource command, the source device 1 enters an inactive state.

  FIG. 2 is a flowchart illustrating an example of an operation procedure of the active state determination unit 3. The active state determination unit 4 is a determination unit that determines whether the source device 1 is in an active state or an inactive state. The active determination unit 3 receives and determines an active control signal from the HDMI CEC control unit 2, and holds the state.

  In S11, the active state determination unit 3 determines whether the power source of the source device 1 has changed from off to on. If it has changed, the process proceeds to S17 and holds that it is in the active state. If not, the process proceeds to S12. The HDMI CEC control means 2 receives information on the power off / on state from the power supply control means 4 and transmits it to the active state determination means 3.

  In S12, the active state determination means 3 determines whether or not the source device 1 has started reproducing the data recorded on the recording medium, and if reproduction has started, moves to S17 and holds it as being in the active state. If reproduction has not started, the process proceeds to S13. The HDMI CEC control unit 2 transmits the reproduction status of the data recorded on the recording medium to the active state determination unit 3.

  In step S13, the active state determination unit 3 determines whether the address of the SetStreamPath command received by the source device 1 matches the address of the source device 1, and if the address matches, moves to step S17 and holds it as being in the active state. If the command has not been received or does not match, the process proceeds to S14. The HDMI CEC control unit 2 transmits the address information of the SetStreamPath command to the active state determination unit 3. Alternatively, the HDMI CEC control unit 2 may transmit to the active state determination unit 3 that the address information of the SetStreamPath command matches.

  In S14, the active state determination means 3 determines whether or not the source device 1 has received the ActiveSource command. If it has been received, the process proceeds to S18 and holds that it is in an inactive state. If not received, the process proceeds to S15. The HDMI CEC control unit 2 transmits reception information of the ActiveSource command to the active state determination unit 3.

  In S15, the active state determination means 3 determines whether the address of the SetStreamPath command received by the source device 1 does not match the address of the source device 1, and if it does not match, the process moves to S18 and is in an inactive state. Hold as there is. If the command has not been received or matched, the process proceeds to S16. The HDMI CEC control unit 2 transmits the address information of the SetStreamPath command to the active state determination unit 3.

  In S16, the active state determination means 3 determines whether or not the New address of the RoutingChange command received by the source device 1 does not match the path of the source device 1, and if it does not match, the process proceeds to S18 and the inactive state. Hold as it is. If they match, exit. The HDMI CEC control unit 2 transmits the address information of the RoutingChange command to the active state determination unit 3.

  In the flowchart shown in FIG. 2, an example of the determination condition for determining whether the active state determination unit 3 is in the active state or the inactive state is shown. However, in addition to the determination condition illustrated in FIG. Although there are conditions, description of examples of determination conditions beyond this will be omitted.

  When the source device 1 is in the active state, the source device 1 is selected as an input destination among one or a plurality of source devices connected to the sink device 6 via HDMI. Conversely, when the source device 1 is in an inactive state, a source device other than the source device 1 is selected as an input destination, or the sink device 6 is in an active state.

  FIG. 3 is a flowchart showing an example of an operation procedure for issuing a command related to power control of the HDMI CEC control unit 2 of the source device 1. The HDMI CEC control unit 2 determines the power control state of the source device 1, determines whether the source device 1 is in an active state or an inactive state, and determines whether or not a power control signal is issued to the sink device 6. The power control signal is, for example, a standby command in the HDMI standard. The system standby command is also simply called a standby command.

  In step S <b> 21, the HDMI CEC control unit 2 determines whether power-off information is notified from the power control unit 4. The power control unit 4 notifies the HDMI CEC control unit 2 of a power-off transition signal when the source device 1 is powered off. If notified, the process proceeds to S22. If not notified, the process returns to the beginning to determine whether the power-off information has been notified.

  In S22, the HDMI CEC control unit 2 determines whether the source device 1 is in an active state or an inactive state. The HDMI CEC control unit 2 acquires and determines information on whether the active state determination unit 3 holds the active state or the inactive state. If it is active, the process proceeds to S23. If inactive, exit.

  In S23, the HDMI CEC control unit 2 transmits a power control signal (standby command) to the sink device 6 and ends.

  The HDMI CEC control means 7 of the sink device 6 receives the power control signal (standby command), and the HDMI CEC control means 7 transmits control information for turning off the power of the sink device 6 to the power control means 8 of the sink device 6. The power control unit 8 turns off the power of the sink device 6.

  As described above, the HDMI CEC control unit 2 of the source device 1 determines whether or not the information that the power of the source device 1 is turned off is notified, and if it is notified, the source device 1 is in an active state or an inactive state. If it is in an active state, a power control signal (standby command) is transmitted to the sink device 6, and if it is in an inactive state, a power control signal (standby command) is not transmitted.

  When the source device 1 is in an active state, the source device 1 is selected as an input destination among one or a plurality of source devices HDMI-connected to the sink device 6, and therefore the power of the sink device 6 is turned off. However, there is no inconvenience for the user, and the usability of the interlock function related to the power control of the sink device is improved when the source device is turned off.

  When the source device 1 is in an inactive state, even if the source device 1 is turned off, the sink device 6 is not turned off, and a state in which a source device other than the source device 1 is selected as an input destination is continued. . Therefore, when the power of the source device is turned off, the usability of the interlock function related to the power control of the sink device is improved.

  FIG. 4 is an overview of the optical disc recorder 11 and the digital television 15. An optical disc recorder 11 is used as the source device 1, and a digital television 15 is used as the sink device 6.

  The optical disc recorder 11 is a recording / reproducing device that records and reproduces video information and audio information with respect to a recording device such as an optical disc or a built-in HDD (Hard Disk Drive) or SSD (Solid State Drive). An HDMI terminal 13 is installed on the back surface of the housing 12 of the optical disk recorder 11.

  The remote controller 14 is an operation device that transmits an operation signal to the operation reception unit of the optical disc recorder 11 using wireless communication such as infrared or Bluetooth.

  The digital television 15 includes a housing 16 and a stand 17 that supports the housing 16. The casing 16 has a display panel 18 such as a liquid crystal panel or a PDP panel disposed on the front side, and a frame (not shown) that supports the display panel 18 is disposed on the back side of the display panel 18. A circuit board and a power supply circuit (not shown) for driving the display panel 18 are installed on the frame. The outer surface is surrounded by the front cover 19 that covers a part of the front side, top surface, bottom surface, and both side surfaces of the housing 16 and the back cover 20 that covers a part of the back surface, top surface, bottom surface, and both side surfaces of the housing 16. ing. The screen 21 is a display portion inside the window 19 a of the front cover 19 of the display panel 18. An HDMI terminal 22 is installed on the back surface of the casing 16 of the digital television 15.

  The remote controller 23 is an operation device that transmits an operation signal to the operation reception unit of the digital television 15 using wireless communication such as infrared or Bluetooth.

  An HDMI cable 24 is connected between the HDMI terminal 13 of the optical disc recorder 11 and the HDMI terminal 22 of the digital television 15.

  FIG. 5 is a block diagram showing an example of the configuration of the optical disc recorder 11 as the source device 1. The antenna 25 is an antenna for terrestrial digital broadcast or satellite digital broadcast for receiving broadcast radio waves transmitted from the broadcast station 26.

  The tuner 27 selects a broadcast signal of a desired channel from broadcast signals of terrestrial digital broadcast or satellite digital broadcast. The tuner 27 is composed of a plurality of tuner units, and can receive a plurality of broadcasts at the same time.

  The demodulator 28 demodulates corresponding to the modulation system of each digital broadcast. The digital terrestrial broadcast signal is demodulated to OFDM (Orthogonal Frequency Division Multiplexing) demodulation, and the satellite digital broadcast signal is demodulated to MPEG (Moving Picture Experts Group) -TS (Transport Stream) by PSK (Phase Shift Keying) demodulation. The data is output to the decoding processing unit 29.

  The decode processing unit 29 has functions such as an MPEG decoder and a video / audio decoder. The decode processing unit 29 sections the MPEG-TS data transmitted from the demodulator 28 and decodes the program information data. Video ES (Packetized Elementary Stream) is converted to video ES (Elementary Stream), and audio PES is converted to audio ES to decode video data and audio data. The decode processing unit 29 decodes the video data and audio data input from the recording device 30.

  The recording device 30 is a recording unit including an HDD, SSD, ODD (Optical Disc Drive) or the like. The recording device 30 is equipped with an encoder and a decoder for recording / reproducing information, and the MPEG-TS data is modulated into a format suitable for the recording / reproducing mode via the encoder and decoder and recorded on the HDD, SSD, or ODD. And played again. The reproduction data is decoded by the decoding processing unit 29.

  The superimposition processing unit 31 performs plane management of the video data from the decoding processing unit 29 and the data broadcasting transferred via the bus 33 and window drawing by the GUI (Graphical User Interface) control means 45 to superimpose the video data. The images are combined and sent to the video / audio output unit 32.

  The video / audio output unit 32 includes packet processing for HDMI transmission / reception and functions of input / output drivers such as a TMDS (Transition Minimized Differential Signaling) encoder / decoder, and the video transmitted from the decoding processing unit 29 or the superimposition processing unit 31. The audio signal is output to the HDMI terminal 13. Also, it receives an HDMI CEC signal from the sink device transmitted via the HDMI cable connected to the HDMI terminal 13 and transmits it to the control unit 34.

  In the optical disk recorder 11, all operations including the above-described reception operation are controlled in an integrated manner by the control unit 34. The control unit 34 is equipped with an MPU (Micro Processing Unit) 35 and controls each component connected via the bus 33.

  A RAM (Random Access Memory) 36 is a read / write memory that stores various data necessary for data processing of the control unit 34, and operates as a buffer memory that stores video data and the like. A ROM (Read Only Memory) 37 is a read only memory, and stores a control program executed by the MPU 35.

  The flash memory 38 is a non-volatile semiconductor memory that can be rewritten and does not lose data even when the power is turned off. The flash memory 38 has a function of storing recorded program information, recording reservation information, and the like.

  The operation reception unit 39 receives an operation signal transmitted from the operation device 40 and transfers the operation signal to the control unit 34. The operation device 40 is, for example, a remote controller (remote controller) 14 using wireless communication using infrared rays or Bluetooth, a wired or wireless keyboard (not shown), and the like, and sends an operation signal. The operation receiving unit 39 receives operation signals from these remote control, keyboard and the like.

  In FIG. 5, the control unit 34 has functions of an HDMI CEC control unit 41, an active state determination unit 42, a power source control unit 43, a recording management unit 44, and a GUI control unit 45. These functions are applications executed by the MPU 35 of the control unit 34, and are normally stored in the ROM 37, and are read and executed by the MPU 35 when used.

  The HDMI CEC control unit 41 performs control based on the HDMI standard, and performs communication with a sink device such as the digital television 15 via the HDMI CEC signal via the HDMI cable connected to the HDMI terminal 13.

The active state determination means 42 determines whether the optical disk recorder 11 is in an active state or an inactive state when the optical disk recorder 11 is connected to a sink device such as the digital television 15 via the HDMI cable 24, for example. It is a determination means. The active state determination means 42 determines the active state according to the flowchart of the operation procedure of the active state determination shown in FIG.
The power control unit 43 performs power-related control including ON / OFF of the power circuit 46 of the optical disc recorder 11. When the power is turned on / off, the power control unit 4 transmits an on / off power control signal to the HDMI CEC control unit 2.

  The recording management means 44 manages broadcast program reservation information set based on a user request. The recording management means 44 performs a recording process for a reserved program and a recording process for a program being viewed. Further, the recording management unit 44 manages the program recorded in the recording device 30. Program information of recorded programs (broadcast station name, broadcast date / time, program name, broadcast overview, performers, program details, program classification, etc.), recording time, discrimination of whether recorded program has been played or not played, etc. It records in the memory 38 or the recording device 30, and manages information on the recorded program. The recording management unit 44 executes processing such as generation of a recorded program list, reproduction and deletion of recorded programs, and editing.

  The GUI control unit 45 generates GUI (Graphical User Interface) data, and the generated GUI data is transmitted to the superimposition processing unit 31 via the bus 33. The GUI data sent to the superimposition processing unit 31 is, for example, superimposed on video data of a broadcast program or processed as a GUI single screen and transmitted to the video / audio output unit 32.

  The HDMI CEC control means 41 of the optical disk recorder 11 determines whether information about turning off the power of the optical disk recorder 11 is notified. If notified, the HDMI CEC control means 41 determines whether the optical disk recorder 11 is in an active state or not. It is determined whether it is in an active state. If it is in an active state, a standby command is transmitted to the sink device (for example, the digital television 15), and if it is in an inactive state, a standby command is not transmitted.

  The HDMI CEC control means 41 determines whether or not to issue a standby command according to the flowchart showing an example of the operation procedure for issuing the HDMI CEC command related to power control shown in FIG. To the digital television 15).

  When the optical disc recorder 11 is in the active state, since the optical disc recorder 11 is selected as an input destination among one or a plurality of source devices connected to the sink device (for example, the digital television 15) by HDMI, the sink device Even if the power of the digital television 15 is turned off, there is no inconvenience for the user, and the usability of the interlocking function related to the power control of the sink device when the power of the optical disc recorder 11 is turned off is improved.

  When the optical disc recorder 11 is in an inactive state, even if the optical disc recorder 11 is turned off, the sink device (for example, the digital television 15) is not turned off, and a source device other than the optical disc recorder 11 is selected as an input destination. Will continue. Therefore, the usability of the interlocking function related to the power control of the sink device when the optical disc recorder 11 is turned off is improved.

  Note that the present invention is not limited to the above-described embodiments as they are, and can be embodied by modifying the constituent elements without departing from the scope of the invention in the implementation stage. In addition, various inventions can be formed by appropriately combining a plurality of components disclosed in the embodiment. For example, some components may be deleted from all the components shown in the embodiment. Furthermore, constituent elements over different embodiments may be appropriately combined.

DESCRIPTION OF SYMBOLS 1 Source apparatus 2 HDMI CEC control means 3 Active state determination means 4 Power supply control means 5 HDMI terminal 6 Sink equipment 7 HDMI CEC control means 8 Power supply control means 9 HDMI terminal 10 HDMI cable 11 Optical disk recorder 13 HDMI terminal 15 Digital television 22 HDMI terminal 24 HDMI cable 29 Decoding processing unit 30 Recording device 32 Video / audio output unit 34 Control unit 35 MPU
41 HDMI CEC control means 42 Active state determination means 43 Power supply control means 46 Power supply circuit

Claims (10)

An electronic device capable of HDMI connection with a sink device conforming to the HDMI (High Definition Multimedia Interface) (registered trademark) standard,
Determining means for determining whether the sink device is in an active state or an inactive state when HDMI connection is established;
When the power of the electronic device is turned off when the sink device is HDMI-connected, a power control signal is transmitted to the sink device when the electronic device is in an active state, and when the electronic device is in an inactive state, the sink device An electronic device having control means for not transmitting a power control signal to the device.   The electronic device according to claim 1, wherein the power control signal is a standby command in the HDMI standard.   The electronic device according to claim 1, wherein the determination unit determines that the electronic device is in an active state when a power source of the electronic device changes from off to on.   The electronic device according to claim 1, wherein the determination unit determines that the electronic device is in an active state if the electronic device starts reproducing data recorded on a recording medium.   The electronic device according to claim 1, wherein the determination unit determines an active state if the address of the SetStreamPath command received by the electronic device matches the address of the electronic device.   The electronic device according to claim 1, wherein the determination unit determines that the electronic device is in an inactive state when receiving an ActiveSource command.   The electronic device according to claim 1, wherein the determination unit determines an inactive state if the address of the SetStreamPath command received by the electronic device does not match the address of the electronic device.   The electronic device according to claim 1, wherein the determination unit determines an inactive state if a New address of a RoutingChange command received by the electronic device does not match a path of the electronic device. A control signal transmission method for a sink device conforming to HDMI (High Definition Multimedia Interface) (registered trademark) standard and an electronic device capable of HDMI connection,
When the HDMI connection with the sink device is made, it is determined whether it is an active state or an inactive state,
When the power of the electronic device is turned off when the sink device is HDMI-connected, a power control signal is transmitted to the sink device when the electronic device is in an active state, and when the electronic device is in an inactive state, the sink device A control signal transmission method that does not transmit a power control signal to a device.   10. The control signal transmission method according to claim 9, wherein the power control signal is a standby command in the HDMI standard.

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