JP2016001845A - Electronic apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an electronic apparatus that can be prevented from malfunctioning due to a wrong physical address when the electronic apparatus performs communication using a physical address allocated to the apparatus.SOLUTION: A control portion 2 determines a physical address for a BD (Blu-ray Disc) player 100, stores the determined physical address for the BD player 100 in an EDID (Extended Display Identification Data) ROM 12, and associates the physical address for the determined BD player 100 with a logical address for the BD player 100 so as to store the addresses in a storage portion 3. Further, the control portion 2 acquires the physical address for the BD player 100, which the BD player 100 recognizes, and if the acquired physical address for the BD player 100 does not match a physical address, which is stored in the storing portion 3, corresponding to the logic address for the BD player 100, makes the BD player 100 to acquire the physical address for the BD player 100 stored in the EDID ROM 12.

Description

  The present invention relates to an electronic device that communicates with an external device connected via a digital signal cable.

  An AV receiver is known as an electronic device that communicates with an external device connected via a digital signal cable. For example, a BD (Blu-ray (registered trademark) Disc) player as a source device and a TV receiver as a sink device are connected to the AV receiver. FIG. 5 is a diagram showing a connection example of these devices. In the HDMI (registered trademark) standard, the AV receiver 300, the BD players 400a and 400b, and the TV receiver 500 are daisy chain connected by a CEC (Consumer Electronics Control) line. Then, by exchanging CEC messages via the CEC line, for example, a CEC function such as so-called one-touch play in which the TV receiver 500 is turned on in conjunction with the playback of the BD player 400a can be realized. (For example, refer to Patent Document 1).

  In order to exchange the above CEC messages, physical addresses are allocated to the AV receiver 300, the BD players 400a and 400b, and the TV receiver 500. In the HDMI (registered trademark) standard, the sink device (in this example, the TV receiver 500) determines (assigns) the physical address of the source device or repeater device (in this example, the AV receiver 300), and the repeater device (in this example). In the example, the AV receiver 300) determines (assigns) the physical address of the source device (BD player 400a, 400b). Then, the source device and the repeater device acquire the physical address determined by the sink device from the sink device, and the source device acquires the physical address determined by the repeater device and the sink device from the repeater device and the sink device. Each device recognizes the correspondence between devices using a physical address.

JP 2011-066666 A

  Here, since the above-described physical address changes depending on the insertion / extraction of the digital signal cable between the devices and the on / off state of the power source, the physical address is not necessarily assigned uniquely. For example, as shown in FIG. 6, the physical address (1, 0, 0, 0) of the AV receiver 300 may overlap with the physical address (1, 0, 0, 0) of the BD player 400a. There is. In such a case, a malfunction may occur due to one-touch play or routing change (route switching), which is a CEC function, and an operation unintended by the user may occur.

  An object of the present invention is to prevent a device from malfunctioning due to an incorrect physical address when communication is performed using a physical address assigned to the device.

  An electronic device according to a first aspect of the invention determines a first storage unit, a second storage unit, and a physical address of the external device that can be accessed by an external device connected to the device via a digital signal cable. Storing the physical address of the external device in the first storage unit, storing the determined physical address of the external device and the logical address of the external device in association with each other in the second storage unit, The physical address of the external device recognized by the device is acquired, the physical address of the acquired external device, and the physical address corresponding to the logical address of the external device stored in the second storage unit, And a control unit that causes the external device to acquire a physical address of the external device that is stored in the first storage unit.

  In the present invention, when the acquired physical address of the external device and the physical address corresponding to the logical address of the external device stored in the second storage unit do not match, the control unit The physical address of the external device stored in the storage unit is acquired. Thereby, it is possible to prevent an external device or an electronic device from malfunctioning due to an incorrect physical address.

  An electronic device according to a second aspect is the electronic device according to the first aspect, wherein the control unit stores the determined physical address of the external device in the first storage unit, and stores the determined physical address in the external device. A physical address of the external device stored in one storage unit is acquired.

  In the present invention, the control unit causes the external device to acquire the physical address of the external device stored in the first storage unit when the determined physical address of the external device is stored in the first storage unit. Thereby, it is possible to prevent an external device or an electronic device from malfunctioning due to an incorrect physical address.

  An electronic device according to a third aspect is the electronic device according to the first or second aspect, wherein the control unit recognizes the external device included in the message when receiving the message from the external device. The physical address of the external device is acquired.

  In the present invention, when the control unit receives a message from the external device, the control unit acquires the physical address of the external device that is included in the message and recognized by the external device. As a result, the physical address of the external device can be acquired without performing processing such as transmission of a message for acquiring a physical address from the external device.

  According to the present invention, when communication is performed using a physical address assigned to a device, it is possible to prevent the device from malfunctioning due to an incorrect physical address.

It is a block diagram which shows the structure of the AV receiver which concerns on embodiment of this invention. It is an example of the table which shows the correspondence of a physical address and a logical address. It is a flowchart which shows the processing operation of AV receiver when a CEC function is turned on. It is a flowchart which shows the processing operation of AV receiver at the time of receiving the CEC message transmitted from a BD player. It is a figure which shows the example of a connection of AV receiver, BD player, and TV receiver. It is a figure which shows the example when a physical address overlaps.

  Hereinafter, embodiments of the present invention will be described. FIG. 1 is a block diagram showing an AV receiver 1 according to this embodiment. The AV receiver 1 (electronic device) is, for example, via a BD (Blu-ray (registered trademark) Disc) player 100a, 100b (external device) as a source device and a digital signal cable such as an HDMI (registered trademark) cable. It is connected. The AV receiver 1 is connected to a TV receiver 200 that is a sink device via a digital signal cable, for example. The AV receiver 1 has a function of performing video processing such as scaler conversion on a video signal input from the BD player 100 a and the like and outputting the processed video signal to the TV receiver 200. Note that an audio signal is also input to the AV receiver 1. The AV receiver 1 can also perform audio processing such as amplification on the audio signal and output the audio signal to an external speaker. However, for the sake of simplicity of explanation, description of output of the audio signal is omitted.

  As shown in FIG. 1, the AV receiver 1 includes a control unit 2, a storage unit 3, a display unit 4, an operation unit 5, digital signal input terminals 6a and 6b, a selector 7, a digital signal receiving unit 8, a video processor 9, and a digital processor. A signal transmission unit 10, a digital signal output terminal 11, an EDID ROM 12, and the like are provided.

  The control unit 2 controls each unit constituting the AV receiver 1 according to a control program stored in the storage unit 3. The function of the control unit 2 will be described later. The storage unit 3 (second storage unit) includes a RAM (Random Access Memory) that functions as a main memory of the control unit 2 and a ROM (Read Only Memory) that stores a control program. The storage unit 3 is not limited to the configuration illustrated, and may include a flash memory, an HDD (Hard Disk Drive), and the like.

  The display unit 4 displays a setting screen or the like, and is an LCD (liquid crystal display), a fluorescent display tube, or the like. The operation unit 5 is for accepting a user operation, and is an operation button or a remote controller provided on the housing of the AV receiver 1. By operating the operation unit 5, the user can instruct the digital signal input terminals 6a and 6b to be selected by the selector 7, that is, the BD players 100a and 100b for reproducing the content displayed on the TV receiver 200. It is.

  BD players 100a and 100b are connected to the digital signal input terminals 6a and 6b, respectively, and HDMI (registered trademark) digital video signals reproduced by the BD players 100a and 100b are input thereto. Note that the number of digital signal input terminals 6 included in the AV receiver 1 is not limited to the number exemplified in the present embodiment.

  The selector 7 selects one of the digital signal input terminals 6 a and 6 b in accordance with an instruction from the control unit 2. Specifically, when the digital video signal input from the BD player 100a is output to the TV receiver 200, the selector 7 selects the digital signal input terminal 6a, the digital signal input terminal 6a, the digital signal receiving unit 8, and the like. Connect. When the digital video signal input from the BD player 100 b is output to the TV receiver 200, the selector 7 selects the digital signal input terminal 6 b and connects the digital signal input terminal 6 b and the digital signal receiving unit 8.

  The digital signal receiving unit 8 receives digital video signals input from the digital signal input terminals 6 a and 6 b and outputs them to the video processor 9. The video processor 9 performs video processing such as image quality adjustment and scaler conversion on the digital video signal and outputs the result to the digital signal transmission unit 10. The digital signal transmission unit 10 transmits the digital video signal to the TV receiver 200 via the digital signal output terminal 11. The TV receiver 200 displays video based on the digital video signal input from the AV receiver 1.

  The EDID ROM 12 (first storage unit) is an EEPROM (Electrically Erasable Programmable Read-Only Memory) that stores EDID (Extended Display Identification Data). The EDID includes the resolution of a digital video signal that can be handled by the AV receiver 1. The EDID ROM 12 is connected to the BD players 100a and 100b by a DDC line.

  Here, the control unit 2 is connected to the BD players 100a and 100b and the TV receiver 200 by a CEC line. That is, the AV receiver 1, the BD players 100a and 100b, and the TV receiver 200 are daisy chain connected by the CEC line. Therefore, by exchanging CEC messages via the CEC line, for example, a CEC function such as a so-called one-touch play in which the TV receiver 200 is turned on in conjunction with the playback of the BD player 100a can be realized. .

  The function of the control unit 2 will be described. The control unit 2 determines the physical addresses of the BD players 100a and 100b that are source devices. In the HDMI (registered trademark) standard, the sink device (in this embodiment, the TV receiver 200) determines (assigns) the physical address of the source device and repeater device (in this embodiment, the AV receiver 1), and the repeater device. (In this embodiment, the AV receiver 1) determines (assigns) the physical address of the source device (in this embodiment, the BD players 100a and 100b). Therefore, the control unit 2 first acquires from the TV receiver 200 the physical address of the AV receiver 1 determined by the TV receiver 200 that is a sink device. The TV receiver 200 determines the physical address of the AV receiver 1 as (1, 0, 0, 0), and stores the determined physical address (1, 0, 0, 0) in an EDID ROM (not shown). The control unit 2 is connected to the EDID ROM via the DDC line, and accesses the EDID ROM via the DDC line to acquire the physical address (1, 0, 0, 0) of the AV receiver 1.

  The control unit 2 determines the physical addresses of the BD players 100a and 100b based on the acquired physical address (1, 0, 0, 0) of the AV receiver. Specifically, the control unit 2 uses a physical address (1, 1, 0, 0) indicating that it is the first device in the hierarchy one level lower than the AV receiver 1 as the physical address of the BD player 100a. To decide. Further, the control unit 2 determines a physical address (1, 2, 0, 0) indicating that it is the second device in the hierarchy one level lower than the AV receiver 1 as the physical address of the BD player 100b. .

  The control unit 2 stores the determined physical addresses of the BD players 100 a and 100 b in the EDID ROM 12. Here, when the control unit 2 stores the determined physical addresses of the BD players 100a and 100b in the EDID ROM 12, the BD players 100a and 100b store the physical addresses of the BD players 100a and 100b stored in the EDID ROM 12. Get an address. Specifically, the control unit 2 causes the BD players 100a and 100b to acquire the physical address by transmitting a vendor command for acquiring the physical address to the BD players 100a and 100b. Here, the vendor command is an auxiliary function of the CEC function, and is a command defined uniquely for each vendor (manufacturer). As described above, the EDID ROM 12 is connected to the BD players 100a and 100b by the DDC line. Therefore, the BD players 100a and 100b can access the EDID ROM 12 and obtain the physical address determined by the AV receiver 1.

  In addition, the control unit 2 stores the determined physical addresses of the BD players 100a and 100b in association with the logical addresses of the BD players 100a and 100b in the storage unit 3. FIG. 2 is an example of a table indicating the correspondence between physical addresses and logical addresses stored in the storage unit 3. The logical address is expressed by a number from 00 to 14 indicating the device type. The device type includes a TV receiver (TV), a recorder (Recording Device) such as a BD recorder, a player (Playback Device) such as a BD player, an audio system (Audio System) such as a tuner, and an AV receiver. . As shown in FIG. 2, the logical address “00” of the TV receiver 200 (TV) and the physical address “0, 0, 0, 0” are stored in association with each other. The logical address “04” of the BD player 100a (BD Player 1) and the physical address “1, 1, 0, 0” are stored in association with each other. The logical address “05” of the AV receiver 1 and the physical address “1, 0, 0, 0” are stored in association with each other. The logical address “08” of the BD player 100b (BD Player 2) and the physical address “1, 2, 0, 0” are stored in association with each other.

  In addition, the control unit 2 acquires the physical address of the BD player 100 recognized by the BD player 100. Specifically, when receiving the CEC message from the BD player 100, the control unit 2 acquires the physical address of the BD player 100 recognized by the BD player 100, which is included in the CEC message. Note that the CEC message has a configuration of <Message> [Parameter], and a physical address may be described as [Parameter].

  Further, when the acquired physical address of the BD player 100 and the physical address corresponding to the logical address of the BD player 100 stored in the storage unit 3 do not match, the control unit 2 gives the BD player 100 an EDID. The physical address of the BD player 100 stored in the ROM 12 is acquired.

  Specifically, first, the control unit 2 determines whether or not the acquired physical address of the BD player 100 matches the physical address corresponding to the logical address of the BD player 100 stored in the storage unit 3. Judging. For example, if the acquired physical address of the BD player 100b is “1, 2, 0, 0”, it matches the physical address “1, 2, 0, 0” corresponding to the logical address “08” of the BD player 100b. Therefore, the control unit 2 determines that the acquired physical address of the BD player 100b matches the physical address corresponding to the logical address of the BD player 100b stored in the storage unit 3. Also, for example, if the acquired physical address of the BD player 100b is “1, 0, 0, 0”, the physical address “1, 2, 0, 0” corresponding to the logical address “08” of the BD player 100b is Since they do not match, the control unit 2 determines that the acquired physical address of the BD player 100b does not match the physical address corresponding to the logical address of the BD player 100b.

  When the control unit 2 determines that the acquired physical address of the BD player 100 does not match the physical address corresponding to the logical address of the BD player 100, the control unit 2 stores the BD player 100 in the EDID ROM 12. The physical address of the BD player 100 is acquired. The control unit 2 causes the BD player 100 to acquire the physical address by transmitting a vendor command for acquiring the physical address to the BD player 100.

  Hereinafter, the processing operation of the AV receiver 1 when the CEC function is turned on will be described based on the flowchart shown in FIG. First, the control unit 2 accesses the EDID ROM of the TV receiver 200 via the DDC line, and acquires the physical addresses of the TV receiver 200 and the AV receiver 1 (S1). Next, the control unit 2 determines the acquired physical address of the AV receiver 1 as the physical address of the AV receiver 1 (S2). Next, the control unit 2 determines the physical address of the BD player 100 (S3).

  Next, the control unit 2 transmits a vendor command for acquiring a physical address to the BD player 100, thereby acquiring the physical address of the BD player 100 stored in the EDID ROM 12 (S4).

  Hereinafter, the processing operation of the AV receiver 1 when the CEC message transmitted from the BD player 100 is received will be described based on the flowchart shown in FIG. The control unit 2 determines whether a CEC message transmitted from the BD player 100 has been received (S11). While it is determined that the CEC message transmitted from the BD player 100 has not been received (S11: No), the control unit 2 repeatedly executes the process of S11. When it is determined that the CEC message transmitted from the BD player 100 has been received (S11: Yes), the control unit 2 determines whether a physical address is included in the CEC message (S12). When determining that the physical address is included in the CEC message (S12: Yes), the control unit 2 acquires the physical address of the BD player 100 recognized by the BD player 100, which is included in the CEC message. (S13). Next, the control unit 2 determines whether or not the acquired physical address of the BD player 100 matches the physical address corresponding to the logical address of the BD player 100 stored in the storage unit 3 ( S14).

  When the control unit 2 determines that the acquired physical address of the BD player 100 does not match the physical address corresponding to the logical address of the BD player 100 (S14: No), the control unit 2 sets a vendor command for acquiring the physical address to the BD. By transmitting to the player 100, the BD player 100 is made to acquire a physical address (S15).

  If the control unit 2 determines that the physical address is not included in the CEC message (S12: No), the acquired physical address of the BD player 100 matches the physical address corresponding to the logical address of the BD player 100. If so (S14: Yes), the process is terminated.

  As described above, in the present embodiment, the control unit 2 does not match the acquired physical address of the BD player 100 with the physical address corresponding to the logical address of the BD player stored in the storage unit 3. In this case, the BD player 100 is made to acquire the physical address of the BD player 100 stored in the EDID ROM 12. Thereby, it is possible to prevent the BD player 100 and the AV receiver 1 from malfunctioning due to an incorrect physical address.

  In the present embodiment, when the control unit 2 stores the determined physical address of the BD player 100 in the EDID ROM 12, the control unit 2 acquires the physical address of the BD player 100 stored in the EDID ROM 12 in the BD player 100. Let Thereby, it is possible to prevent the BD player 100 and the AV receiver 1 from malfunctioning due to an incorrect physical address.

  In the present embodiment, when the control unit 2 receives a CEC message from the BD player 100, the control unit 2 acquires the physical address of the BD player 100 recognized by the BD player 100, which is included in the CEC message. . Thereby, the physical dress of the BD player 100 can be acquired without performing processing such as transmission of a message for acquiring a physical address from the BD player 100.

  As mentioned above, although embodiment of this invention was described, the form which can apply this invention is not restricted to the above-mentioned embodiment, As suitably illustrated in the range which does not deviate from the meaning of this invention so that it may illustrate below. It is possible to make changes.

  In the above-described embodiment, an AV receiver that is a repeater device is exemplified as an electronic device that communicates with an external device connected via a digital signal cable. The electronic device is not limited to this, and may be a TV receiver or the like that is a sink device as long as it is a device that determines the physical address of an external device connected via a digital signal cable.

  The present invention can be suitably employed in an electronic device that communicates with an external device connected via a digital signal cable.

1 AV receiver (electronic equipment)
2 Control unit 3 Storage unit (second storage unit)
6 Digital signal input terminal 8 Digital signal reception unit 9 Video processor 10 Digital signal transmission unit 11 Digital signal output terminal 12 EDID ROM (first storage unit)
100a, 100b BD player (external device)
200 TV receiver

Claims (3)

A first storage unit accessible to an external device connected to the device via a digital signal cable;
A second storage unit;
Determine the physical address of the external device;
Storing the determined physical address of the external device in the first storage unit;
The determined physical address of the external device and the logical address of the external device are associated with each other and stored in the second storage unit,
Obtaining the physical address of the external device recognized by the external device;
If the acquired physical address of the external device and the physical address corresponding to the logical address of the external device stored in the second storage unit do not match, the external device is stored in the first storage unit. A stored control unit for acquiring a physical address of the external device;
An electronic device comprising:   The control unit causes the external device to acquire the physical address of the external device stored in the first storage unit when storing the determined physical address of the external device in the first storage unit The electronic device according to claim 1.   The control unit, when receiving a message from the external device, acquires a physical address of the external device that is included in the message and recognized by the external device. Or the electronic device of 2.

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