JP5148639B2 - Video / audio processing apparatus and video / audio processing method - Google Patents

Description

  The present invention relates to a video / audio processing apparatus and a video / audio processing method having a digital interface for processing signals such as video / audio.

  In recent years, television receivers as video / audio processing devices have become highly functional, and digital interfaces (for example, high-definition multimedia interface (HDMI) input terminals) that can transmit and receive video / audio signals and control signals using a single cable. ) Has been commercialized. High-Definition Multimedia Interface and HDMI are registered trademarks.

  An HDMI cable is usually provided with one (1ch) CEC (Consumer Electronics Control) control line for transmitting and receiving commands between devices. In this CEC, a command (control signal) common to each vendor is specified, and a command can be specified independently so that each vendor can expand the function of the product. In the following description, an HDMI cable provided with a CEC control line is referred to as an HDMI-CEC control line.

  Control using the HDMI-CEC control line is performed according to the following procedure. When a source device such as a recorder or a player is connected to an HDMI terminal provided in the television receiver, commands are exchanged between the television receiver and the source device, and a communication address is assigned to the source device. Next, when the command is transmitted from the television receiver, the function control of the source device is performed by designating the previously assigned address.

Here, in order to improve the convenience for the user, there is one that allows the user to select whether to use control by HDMI-CEC (hereinafter referred to as CEC interlocking setting) (for example, Patent Document 1). In this video / audio processing apparatus, HDMI-CEC control is enabled for all connected devices when the CEC interlocking setting is turned ON, and HDMI-CEC for all connected devices is enabled when the CEC interlocking setting is OFF. Control is disabled.
(For example, refer to Patent Document 1).

JP 2009-71396 A (paragraph [0007] etc.)

  However, in recent years, a television receiver that incorporates a source device such as a DVD player and controls the built-in source device using HDMI-CEC has been commercialized. In a television receiver with such a built-in source device, if control by HDMI-CEC for all connected devices is invalidated, even the built-in source device cannot be used. In addition, when a dedicated line provided separately from the HDMI-CEC control line is used for controlling the built-in source device, cooperation for controlling the built-in source device and HDMI-CEC control of the externally connected source device It is necessary to develop functional parts, resulting in high costs.

  The present invention has been made to solve such a problem. Even when control by HDMI-CEC is invalidated, a built-in source device can be controlled by HDMI-CEC and a video / audio processing device and a video / audio processing device can be controlled. An object is to provide a voice processing method.

  A video / audio processing apparatus according to an embodiment of the present invention includes a housing including a terminal to which a first source device that processes video / audio can be connected, and a video / audio that is disposed in the housing. A second source device, a control device connected to the terminal and the second source device via a digital interface, and transmitting and receiving a control signal to and from the first and second source devices through a control line of the digital interface; And a receiving unit that receives a setting signal for setting validity / invalidity of the control signal between the second source device and the control device, and the control device receives a setting signal for setting the invalidation of the control signal by the receiving unit. And the function corresponding to the control signal transmitted from the first source device is not executed.

  A video / audio processing method according to an embodiment of the present invention processes a video / audio signal disposed in a housing with a housing including a terminal to which a first source device that processes the video / audio signal can be connected. A second source device that connects to the terminal and the second source device via a digital interface, and transmits and receives a control signal to and from the first and second source devices through a control line of the digital interface. And a video / audio processing method by a video / audio processing apparatus comprising: a receiving unit configured to receive a setting signal for setting validity / invalidity of a control signal between the first and second source devices and the control device; The apparatus does not execute a function corresponding to the control signal transmitted from the first source device when the accepting unit accepts a setting signal for setting invalidity of the control signal.

  According to the present invention, it is possible to provide a video / audio processing apparatus and a video / audio processing method capable of controlling by HDMI-CEC for a built-in source device even when control by HDMI-CEC is invalidated.

It is a figure which shows the structure of TV with a built-in BD player of one Embodiment of this invention. It is a flowchart which shows an address acquisition operation | movement. It is a timing chart which shows an address acquisition operation. It is a flowchart which shows polling operation | movement. It is a flowchart which shows the operation | movement at the time of command reception.

  Hereinafter, a television apparatus with a built-in BD player (hereinafter referred to as “BD player built-in TV”) according to an embodiment of the video / audio processing apparatus of the present invention will be described in detail with reference to the drawings. FIG. 1 is a diagram showing a configuration of a TV with a built-in BD player.

  As shown in FIG. 1, the TV with a built-in BD player according to this embodiment includes an output unit such as a display 37 for video display and a speaker 38, and a TV housing that contains functional components for generating information to be output to the display 37 and the speaker 38. And the external input HDMI terminal 19 and the power supply unit 8 provided in the TV casing 1. Note that a plurality (two or more) of terminals may be provided.

  The power supply unit 8 AC / DC converts a primary power supply (AC 100 V) supplied from a commercial power supply such as a household wall outlet. The power supply unit 8 supplies the AC / DC converted operation power (DC +12 V, +5 V, etc.) to the BD unit 2 (second source device) and the TV unit 3.

  An external source device (for example, a BD player, a DVD player, an AV amplifier, a recorder, an AV selector, etc.) is detachably connected to the HDMI terminal 19 for external input via a general-purpose HDMI cable.

  In the TV casing 1, an HDMI cable 6 for internal wiring is connected from an HDMI terminal 19 for external input and wired to the TV unit 3. The HDMI cable 6 includes a hot plug detection line 12 (hereinafter referred to as “HPD line 12”), an HDMI-CEC control line 13, a + 5V power supply line 16, a data line 18 which is a video / audio data line, and the like.

  The external source device and the built-in source device are connected to the HDMI-CEC control line 13 through a physically common wiring (a state where one wiring is branched into two). By exchanging commands (control signals) via the HDMI-CEC control line 13, operation control, switching control, and the like of source devices connected inside and outside are performed.

  Examples of the command include a vendor command, deck status command, and active source command that are used by individual vendors for individual function control. The vendor command and the deck status command are direct commands and are commands specifying the destination. The active source command is a broadcast command for performing an address acquisition request polling operation. The deck status command is a command for controlling the device from an individual device. For example, the operation according to the button operation such as disc playback / stop from the TV-side remote controller 9 (hereinafter, remote controller 9) to the BD unit 2 is performed. It is a command to make

  The TV unit 3 includes a control device 30, a TV tuner 35, a video / audio processing unit 36, a display 37, a speaker 38, and the like.

  The TV tuner 35 receives the television broadcast input from the antenna and outputs the received program video / audio to the video / audio processing unit 36. The TV tuner 35 includes at least one of a digital tuner and an analog tuner. A plurality of digital tuners or analog tuners may be mounted.

  The video / audio processing unit 36 reproduces the video / audio digital data or analog signal input from the TV tuner 35 and the video / audio digital data input from the data lines 17 and 18 of the HDMI cables 5 and 6, respectively. To do. The video / audio processing unit 36 is controlled by the control device 30 to switch data or signals input from the TV tuner 35 and the HDMI cables 5 and 6 and output them to the display 37 and the speaker 38. In addition, the video / audio processing unit 36 displays a selection screen for CEC interlocking setting on the display 37. The user operates the remote controller 9 or an operation button (not shown) provided on the TV housing 1 to select ON (valid) or OFF (invalid) of the CEC interlocking setting. When the multi-screen display function is provided, the video / audio processing unit 36 performs playback processing so that each video source is displayed on a plurality of divided screens.

  The display 37 displays the video reproduced by the video / audio processing unit 36 on the screen. The speaker 38 outputs the sound reproduced by the video / audio processing unit 36.

  The control device 30 includes HDP control units 31 and 32, a CEC control unit 33, and a memory 34 (first and second memories) provided for each HDMI.

  The HDP control unit 31 detects the connection of the built-in source device (BD unit 2) to the HDMI terminal 29 (HDMI cable 5), and outputs the HDP signal to the BD unit 2 from which the connection is detected from the de-assert (stop state). Functions as a hot plug detector that changes to Asserted (active state).

  The HDP control unit 32 detects the connection of an external source device (DVD player 4: first source device) to the HDMI terminals 29 and 39 (HDMI cable 6), and outputs an HDP signal to the DVD player 4 whose connection is detected. It functions as a hot plug detection unit (HPD detection unit) that changes from de-assert (stop state) to Asserted (active state).

  In this example, the HDP signal is changed, but the detection of the connection of the source device may be switched depending on whether or not a hot plug detection signal is output. In this case, the HDP control unit 31 outputs to the HDMI cable 5 a signal indicating hot plug detection for the BD unit 2 in which connection is detected. Further, the HDP control unit 32 outputs a signal indicating hot plug detection for the DVD player 4 whose connection is detected to the HDMI cable 6.

  The memory 34 stores logical addresses “0” to “14” and physical addresses (1.0.0.0) and (2.0.0.0) corresponding to the HDMI input terminals 29 and 39. Yes. The memory 34 is a communication address memory capable of storing a communication address (a pair of a physical address and a logical address) determined by the source device by the communication address acquisition operation and notified from the source device.

  When the HDP control unit 31 detects the connection of the BD unit to the HDMI input terminal 29, the CEC control unit 33 sets the physical address (1.0.0.0) corresponding to the HDMI input terminal 29 to the BD unit 2. Sent as a physical address. When the HDP control unit 32 detects the connection of the BD unit to the HDMI input terminal 39, the CEC control unit 33 sets the physical address (2.0.0.0) corresponding to the HDMI input terminal 39 to the DVD player. 4 is transmitted as a physical address.

  Further, the CEC control unit 33 extracts a communication address included in the address determination notification received from each source device through the HDMI-CEC control line 13 which is a common control line from the HDMI cables 5 and 6, and performs communication. Store in the address memory 34. Thereafter, the CEC control unit 33 performs communication control for the source device using the communication address stored in the memory 34. Further, the CEC control unit 33 stores ON / OFF of the CEC interlocking setting by the user received by the receiving unit 10 in the memory 34. The CEC control unit 33 stores, for example, whether the CEC interlocking setting is ON or OFF by setting a flag at a specific address in the memory 34 when the CEC interlocking setting is ON.

  The TV unit 3 is provided with an HDMI terminal 29 connected to the BD unit 2 via the HDMI cable 5 and an HDMI terminal 39 connected to the HDMI terminal 19 via the HDMI cable 6.

  For example, a BD player unit 2 (hereinafter referred to as “BD unit 2”) that reads and reproduces information recorded on a disc-shaped recording medium (BD disc or the like) such as a Blu-ray disc (hereinafter referred to as “BD”) or a DVD. And so on) are connected via an HDMI cable 5 for internal wiring. The HDMI terminal 29 is connected to the control device 30 via each internal wiring.

  As the wiring of the HDMI cable 5, for example, a hot plug detection line 11 (hereinafter referred to as “HPD line 11”), an HDMI-CEC control line 13, a + 5V power supply line 15, and a video / audio line 17 that is a video / audio data line. Etc.

  The BD unit 2 includes a candidate memory 21, a holding unit 22, and a CEC control unit 23 as a communication address acquisition unit. Examples of the BD unit 2 include not only a device for reproducing video / audio of a BD disc but also a device for recording video / audio on a BD disc. Blu-ray and Blu-ray Disc are registered trademarks.

  The candidate memory 21 is realized by, for example, an EEPROM that can be held even when power is not supplied. The candidate memory 21 stores in advance a physical address given from the CEC control unit 33 and at least one logical address candidate that can be acquired by the BD unit 2.

  In the HDMI-CEC standard, a logical address assigned to a connected device is determined for each device type. In this example, the device type is “Playback Device” in the BD unit 2 or the like. “4”, “8”, and “11” can be acquired. In this example, it is assumed that these three addresses “4”, “8”, and “11” are stored in the candidate memory 21.

  The holding unit 22 is realized by a RAM, and holds a determined communication address (a pair of a physical address and a logical address). Since the holding unit 22 is a RAM, the communication address is held until the power supply is stopped after the address is acquired.

  When the HPD signal changes to an active state, the CEC control unit 23 reads out physical addresses and candidates for one logical address for communication (for example, “4”, etc.) from the candidate memory 21 in a certain order. The polling operation of the address acquisition request including the address of the above is performed through the HDMI cable 5. The certain order is, for example, an order from a small value to a large value, or from a large value to a small value.

  Thereafter, when a response (ACK) indicating that the candidate logical address is in use is not received from another source device (for example, DVD player 4), the CEC control unit 23 sets the candidate as a logical address for communication. The communication address including the determined logical address and the physical address (1.0.0.0) given from the CEC control unit 33 is included in the address determination notification, and is controlled through the HDMI-CEC control line 13. Transmit to the CEC control unit 33 of the device 30.

  The DVD player 4 includes a candidate memory 41, a holding unit 42, and a CEC control unit 43 as a communication address acquisition unit. Examples of the DVD player 4 include not only a device for reproducing video / audio of a DVD disc but also a device for recording video / audio on a DVD disc.

  The candidate memory 41 is realized by, for example, an EEPROM that can be retained even when power is not supplied. The candidate memory 41 stores in advance a physical address given from the CEC control unit 33 and at least one logical address candidate that can be obtained by the DVD player 4.

  As described above, in the HDMI-CEC standard, the logical address assigned to the connected device is determined for each device type, and the device type of the DVD player 4 is “Playback Device”. ”,“ 8 ”, and“ 11 ”are stored in the candidate memory 41.

  The holding unit 42 is realized by a RAM, and holds a determined communication address (a pair of a physical address and a logical address). Since the holding unit 42 is a RAM, the communication address is held until the power supply is stopped after the address is acquired.

  When the HPD signal changes to an active state, the CEC control unit 43 reads out physical addresses and candidates for one logical address for communication (for example, “4”, etc.) from the candidate memory 41 in a certain order, The polling operation of the address acquisition request including the address of the above is performed through the HDMI cable 6. The certain order is, for example, an order from a small value to a large value, or from a large value to a small value.

  Thereafter, when a response (ACK) indicating that the candidate logical address is in use is not received from another source device (for example, the BD unit 2), the CEC control unit 43 sets the candidate as a logical address for communication. The communication address including the determined logical address and the physical address (2.0.0.0) given from the CEC control unit 33 is included in the address determination notification, and the HDMI-CEC control line 13 is used. The data is transmitted to the CEC control unit 33 of the control device 30.

  As described above, when the HPD signal changes from de-assert to Asserted, the CEC control units 23 and 43 read the communication address candidates one by one from the candidate memories 21 and 41, and use the communication address candidates. The communication address acquisition process is performed by polling, and the determined communication address is notified to the control device 30 through the HDMI-CEC control line 13.

(Address acquisition operation)
FIG. 2 is a flowchart showing the address acquisition operation. FIG. 3 is a timing chart showing the address acquisition operation. Here, the address acquisition operation of this embodiment will be described with reference to FIGS. The logical address acquisition operation by the CEC control units 23 and 43 is substantially the same. Therefore, here, the logical address acquisition operation by the CEC control unit 23 will be described, and the redundant description of the logical address acquisition operation by the CEC control unit 43 will be omitted.

  In the TV with a built-in BD player, when an AC outlet drawn from the TV casing 1 is inserted into a commercial power source such as a wall outlet at home, and the primary power is supplied to the power supply unit 8, the power supply unit 8 is used for operation. Is supplied to the BD unit 2 and the TV unit 3 (step S101).

  The CEC control unit 23 waits for the HPD signal input from the TV unit 3 through the HDMI-CEC control line 13 to be asserted (active state) (step S102).

  When power for operation is supplied from the power supply unit 8 to the TV unit 3, in the TV unit 3, the HPD control unit 32 transmits the HPD signal to the BD unit 2 from de-assert (stop state) to Asserted (active state). (Yes in step S102).

  When the HPD signal changes from de-assert (stopped state) to Asserted (active state), the CEC control unit 23 of the BD unit 2 normally selects an address “4” having a small value from the candidates in the candidate memory 21. One is read (step S103), and a logical address acquisition operation is performed (step S104).

  As described above, in the logical address acquisition operation, the CEC control unit 23 confirms whether or not the read address “4” is acquired by another source device (in this embodiment, the DVD player 4). Therefore, a polling operation for acquiring the address “4” is performed using the broadcast command. When there is no response (ACK) from another source device after the polling operation, the CEC control unit 23 sets the address “4” as the logical address, assuming that the address “4” is not used. If there is a response (ACK) from another source device after the polling operation, the next candidate address “8” is read assuming that the address “4” is used. Thereafter, the same operation is performed, and when there is no reply from another source device for a fixed time after the polling operation, the address “8” is set as the logical address.

  When the CEC control unit 23 sets the logical address to “4”, for example, the CEC control of the TV unit 3 uses the set address “4” and the physical address (1.0.0.0) given from the CEC control unit 33. A command is transmitted to the unit 33 (step S105). The CEC control unit 33 of the TV unit 3 extracts the communication address (logical address and physical address) included in the address determination notification transmitted from the CES control unit 23 and stores it in the communication address memory 34. Thereafter, the CEC control unit 33 performs communication control for the BD unit 2 using the communication address stored in the memory 34.

(Polling operation)
FIG. 4 is a flowchart showing a polling operation by the control device 30 of the TV unit 3. Here, with reference to FIG. 4, the polling operation for the BD unit 2 and the DVD player 4 by the CEC control unit 33 will be described.

  After obtaining the logical address described with reference to FIGS. 2 and 3, the CEC control unit 33 of the control device 30 stores the memory 34 during initial operation such as when power for operation is supplied from the power supply unit 8 to the TV unit 3. Polling operations are sequentially performed on the logical addresses “1” to “14” stored in advance in step S201.

  Next, the CEC control unit 33 transmits <Give Physical Address> to the logical address for which the response (ACK) has been received, requests transmission of the physical address (step S202), and acquires the returned physical address. (Step S203). Note that a logical address is also given to the returned physical address.

  The CEC control unit 33 refers to the memory 34 and confirms whether the returned physical address is the address (1.0.0.0) of the BD unit 2 (step S204). If the returned physical address is not the address (1.0.0.0) of the BD unit 2 (No in step S204), the CEC control unit 33 returns to the operation in step S201 and performs a polling operation for the next logical address. I do.

  When the returned physical address is the address (1.0.0.0) of the BD unit 2 (Yes in step S204), the CEC control unit 33 sets the logical address assigned to the physical address to the physical address. The association is stored in the memory 34 (step S205).

  The CEC control unit 33 refers to the memory 34 and checks whether the CEC interlocking setting is ON (step S206). When the CEC interlocking setting is ON (Yes in step S206), the CEC control unit 33 periodically performs a polling operation thereafter (step S207). When the CEC interlocking setting is OFF (No in step S206), the CEC control unit 33 does not perform the subsequent polling operation (step S208).

  Note that the device type may be confirmed after the physical address is confirmed in step S204 and before the logical address is stored in step S205. In this case, the physical address of the BD unit 2 and the device type may be stored in the memory 34 in advance, and the memory 34 may be referred to at the time of confirmation.

(Operation when receiving a command)
FIG. 5 is a flowchart showing the operation of the control device 30 of the TV unit 3 when a command transmitted from the source device (the BD unit 2 and the DVD player 4) is received. Here, the operation of the CEC control unit 33 when receiving a command from the source device will be described with reference to FIG.

  When the CEC control unit 33 receives a command (HDMI-CEC signal) transmitted from the connected source device (the BD unit 2 and the DVD player 4) (step S301), the CEC control unit 33 It is confirmed from the destination address whether the received command is broadcast (step S302). Whether it is broadcast or not can be confirmed by checking whether the transmission destination address is “F (hexadecimal number)”. In the case of broadcast, the transmission destination address is “F”.

  If the received command is not broadcast (No in step S302), the CEC control unit 33 checks whether or not the transmission destination of the received command is addressed to itself (step S303). When the transmission destination of the received command is addressed to itself (Yes in step S303), the CEC control unit 33 refers to the memory 34 and confirms whether the CEC linkage setting is ON (step S304). When the CEC interlocking setting is not ON (No in Step S304), the CEC control unit 33 confirms whether or not the logical address of the BD unit 2 has been acquired (Step S305).

  When the logical address of the BD unit 2 has been acquired (Yes in step S305), the CEC control unit 33 determines whether the transmission source address of the received command matches the logical address of the BD unit 2 stored in the memory 34. That is, it is confirmed whether or not the transmission source address is the BD unit 2 (step S306). When the transmission source address of the received command matches the logical address of the BD unit 2 stored in the memory 34 (Yes in Step S306), the CEC control unit 33 responds (ACKs) to the BD unit 2 (Step S306). In step S307, the received command is validated, that is, a function corresponding to the received command is executed (step S308).

  If the CEC interlocking setting is ON in step S303 (Yes in step S303), or if the logical address of the BD unit 2 has not been acquired in step S305 (No in step S305), the CEC control unit 33 2 is acknowledged (ACK) (step S307), and the received command is validated (step S308).

  In step S302, if the received command is broadcast (Yes in step S302), the CEC control unit 33 refers to the memory 34 and checks whether the CEC link setting is ON (step S309). When the CEC interlocking setting is not ON (No in Step S309), the CEC control unit 33 confirms whether or not the logical address of the BD unit 2 has been acquired (Step S310).

  When the logical address of the BD unit 2 has been acquired (Yes in step S310), the CEC control unit 33 determines whether the transmission source address of the received command matches the logical address of the BD unit 2 stored in the memory 34. That is, it is confirmed whether or not the transmission source address is the BD unit 2 (step S311). If the source address of the received command matches the logical address of the BD unit 2 stored in the memory 34 (Yes in step S311), the CEC control unit 33 does not respond (ACK) to the BD unit 2. (Step S312) The received command is validated, that is, a function corresponding to the received command is executed (Step S308).

  If the destination of the received command is not addressed to itself in step S303 (No in step S303), the source address of the received command is stored in the memory 34 in the logic of the BD unit 2 in step S306 and step S311. If the address does not match, that is, the transmission source address is not BD unit 2 (No in steps S306 and S311), the CEC control unit 33 does not respond (ACK) (step S313) and invalidates the received command. That is, the function corresponding to the received command is not executed (step S3314).

  If the CEC interlocking setting is OFF, the CEC control unit 33 transmits a command addressed to the CEC control unit 23 of the BD unit 2 and does not transmit a command addressed to the CEC control unit 43 of the DVD player 4.

  As described above, according to this embodiment, it is confirmed whether or not the CEC interlocking setting is ON. When the CEC interlocking setting is OFF, only the command transmitted from the BD unit 2 is validated. The command is invalidated without responding (ACK) to the command transmitted from the source device. For this reason, it is possible to control the built-in BD unit 2 with the interlocking function turned off for the externally connected source device (DVD player 4).

  In addition, since it is not necessary to use a dedicated line provided separately from the HDMI-CEC control line for controlling the built-in source device (BD unit 2), control of the built-in source device and a source device (DVD player) connected externally 4) It is not necessary to develop collaborative functional parts for HDMI-CEC control, and manufacturing costs can be reduced.

In addition, this invention is not limited only to the said embodiment, You may deform | transform a component in the range which does not deviate from the summary in an implementation stage. For example, each component may be realized by a program installed in a storage such as a hard disk device of a computer, and the above program is stored in a computer-readable electronic medium: electronic media, and the program is transferred from the electronic medium to the computer. The computer may realize the functions of the present invention by causing the computer to read them. Examples of the electronic medium include a recording medium such as a CD-ROM, a flash memory, and a removable media.
Further, the configuration may be realized by distributing and storing components in different computers connected via a network, and communicating between computers in which the components are functioning.

  DESCRIPTION OF SYMBOLS 1 ... TV housing | casing, 2 ... BD unit (2nd source device), 3 ... TV unit, 4 ... DVD player (1st source device), 5-7 ... HDMI cable, 8 ... Power supply unit, 9 ... Remote controller (Remote control) 10 ... accepting means 19, 29, 39 ... HDMI input terminal, 11, 12 ... HPD line, 13 ... CEC control line, 21, 41 ... candidate memory, 22 ... holding unit, 23, 33, 43 ... CEC control unit, 30... Control device, 31, 32... HPD control unit, 34... Memory (first and second memories).

Claims (9)

A housing having a connectable terminal a first source device for processing video and audio,
A second source device for processing video / audio arranged in the housing;
A control device that is connected to the terminal and the second source device via a digital interface, and that transmits and receives control signals to and from the first and second source devices through a control line of the digital interface;
And accepting means for accepting a setting signal for setting to enable or disable the control signals between the first source device and the control device,
With
The control device does not execute a function corresponding to the control signal transmitted from the first source device when the accepting unit accepts a setting signal for setting invalidity of the control signal, and from the second source device. A video / audio processing apparatus that executes a function corresponding to a control signal to be transmitted .   The control device includes a first memory in which a physical address of the second source device is stored, and based on the physical address stored in the first memory, the received control signal is the second memory. 2. The video / audio processing apparatus according to claim 1, wherein the video / audio processing apparatus determines whether or not the transmission has been made from a source device.   The control device further includes a second memory in which candidates for communication addresses that can be acquired by the first and second source devices are stored, and one communication read out from the second memory in a predetermined order Polling is performed using the candidate for the communication address, the communication address acquired by the second source device is acquired, and after the communication address acquired by the second source device is acquired, the polling operation is performed. 3. The video / audio processing apparatus according to claim 1, wherein the video / audio processing apparatus is not provided. The controller is
If the control signal is transmitted by broadcast, no response is made to the control signal. If the control signal is transmitted to itself, the control signal is transmitted from the first source device. 4. A response to the control signal is performed if the control signal is not transmitted and the control signal is transmitted from the second source device. The video / audio processing device according to the item. The apparatus further includes a display that is provided in the housing and displays a video processed by the first and second source devices, and a speaker that outputs audio processed by the first and second source devices. 5. The video / audio processing apparatus according to claim 1, wherein the video / audio processing apparatus is characterized in that: Wherein a housing having a connectable terminal a first source device for processing video and audio signals, a second source device for processing video and audio signals which is disposed in the housing, and the terminal first is connected via a digital interface to the second source equipment, the first, and a control unit for transmitting and receiving a control signal through the control line of the digital interface between the second source device, the first source device and said A video / audio processing method by a video / audio processing device comprising: a receiving unit configured to receive a setting signal for setting the validity / invalidity of a control signal between control devices;
The control device does not execute a function corresponding to the control signal transmitted from the first source device when the accepting unit accepts a setting signal for setting invalidity of the control signal, and from the second source device. A video / audio processing method, wherein a function corresponding to a control signal to be transmitted is executed .   The control device determines whether a received control signal is transmitted from the second source device based on a physical address of the second source device stored in a first memory. The video / audio processing method according to claim 6.   The control device performs polling using one communication address candidate read in a predetermined order from a second memory in which communication address candidates that can be acquired by the first and second source devices are stored. 7. The polling operation is not performed after the communication address acquired by the second source device is acquired and the communication address acquired by the second source device is acquired. Alternatively, the video / audio processing method according to claim 7.   When the control signal is transmitted by broadcast, the control device does not respond to the control signal, and when the control signal is transmitted to itself, the control signal is transmitted from the first source device. If not, no response is made to the control signal, and if the control signal is transmitted from the second source device, a response to the control signal is made. The video / audio processing method according to any one of the above.

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