JPH07255092A - Method and device for controlling electronic equipment - Google Patents

Abstract

PURPOSE:To perform communication by radio between equipments constituting an AV system. CONSTITUTION:The transmission/reception part of a AV center 1 sends a command frame indicating the start of reproducing operation and transmission right to equipment 1 with infrared rays. Those are received by the transmission/ reception part of the equipment 1, which performs the reproducing operation and also sends an answer and the transmission right to the AV center 1 from the transmission/reception part with infrared rays. Equipments 2 and 3 operate similarly. When a control signal for the equipment 1, 2 or 3 is sent to the AV center 1 from the remote control 20, the command frame corresponding to the signal is sent from the transmission/ reception part 40 to the equipment 1, 2, or 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electronic device control apparatus suitable for use in controlling each device constituting an AV system, for example.

[0002]

2. Description of the Related Art FIG. 44 is a block diagram showing the configuration of an embodiment of a conventional AV system.

The AV system is a television receiver (T
V) provided with input terminals P1 to P4
Center 1, audio amplifier (AU-AMP) 2,
An audio tuner (A. TUNER) 3, a compact disc (CD) device 4, a mini disc player (MD) 5 and a tape recorder (TC) 6 are provided, and an audio tuner (A. TUNER) 3 and a compact disc (CD) ) Device 4, mini disc player (MD)
5 or the audio signals output from the respective output terminals P1 of the tape recorder (TC) 6 are supplied to the input terminals P1 of the audio amplifiers (AU-AMP) 2, respectively, and after being amplified there, the AV center 1 It is adapted to be supplied to the input terminal P4. Further, the AV center 1 is adapted to transmit a control signal to each device in accordance with a signal transmitted from the remote controller 20.

The AV system also includes a first VTR (video tape recorder) 7, a second VTR 9, and a third VTR.
8, the fourth VTR 11, and a video tuner (V.TUN
ER) 10 and multi-disc player (MDP) 12
And the AV signal output from the first VTR 7 is
The AV signal input to the input terminal P3 of the center 1 and output from the second VTR 9 is input to the input terminal P2 of the AV center 1 and further output from the fourth VTR 11.
The signal is supplied to the input terminal P1 of the AV center 1.

The AV signal output from the output terminal P1 of the third VTR 8 is input to the input terminal P2 of the first VTR 7. In addition, V. TUNER1
The AV signal output from the output terminal P1 of 0 is the second VT
The signal is input to the input terminal P1 of R9.
Similarly, the AV signal output from the output terminal P1 of the MDP 12 is input to the input terminal P1 of the fourth VTR 11.

Further, as shown in FIG. 45, each device constituting the AV system transmits / receives a control signal between each device separately from the AV signal line for inputting / outputting a video or audio signal. Two terminals (not shown) for connecting the AV control signal line are connected in cascade by an AV bus 30 such as a D2B bus of the D2B protocol specification. In this case, the AV center 1 and MD
P12 is terminated. That is, the device for one control line terminal of the AV center 1 is left as it is without connecting the device. Similarly, one terminal for the control line of the MDP 12
Leave the device unplugged. As a result, the AV center 1 and the MDP 12 have a terminating resistance of 120 ohms, for example.

Further, as shown in FIG. 46, an address is set in advance in each device constituting the AV system, and by designating the address, each device controls other predetermined devices. It is designed to be able to send signals. For example, the VTR has 120H to 12
7H address assigned, laser disc player (LDP) or multi-disc player (MDP)
Are assigned addresses of 130H to 137H. Also, the video tuner has 128H to 12
An FH address is assigned.

In this case, 120H for the first VTR 7, 121H for the second VTR 9 and 122H for the third VTR 8.
The fourth VTR 11 has 123H, V. An address of 128H is set in the TUNER 10 and an address of 130H is set in the MDP 12 in advance.

Therefore, by supplying various control signals or data to each device via the AV bus 30 in a frame format described later, each device can operate in conjunction with each other.

FIG. 47 shows D2B of D2B protocol specification.
FIG. 6 is a diagram showing a frame format of data transmitted / received via a bus 30.

The frame is composed of a header field, a master address field (MAF), a slave address field (SAF), a control field (CF), and a data field (DF).

The header field includes a start bit and a mode bit, the master address field includes a master address, and the slave address field includes a slave address, a parity bit (P), and an acknowledge bit (A). This acknowledge bit is transmitted from the receiving side to the transmitting side. The control bit field is composed of a control bit (CB), a parity bit, and an acknowledge bit, and the data field is a data bit, E.
It consists of ND OF DATA BIT (EOD), parity bit, and acknowledge bit.

The start bit indicates the start of a frame. The mode bit indicates the speed of communication, 0 indicates low speed, 10 indicates medium speed, and 110 indicates high speed. The master address describes the address of the transmission source device that transmitted the frame, and the slave address describes the address of the transmission destination device that transmits the frame. Also, the type of frame is described in the control bit.

When the frame is a command frame, the data field shown in FIG. 47 has the structure shown in FIG. The textHD is a header of the data field and describes information for identifying the format of the data field. The HDOPR describes the type of data described in the data field. Further, HDADR describes a sub device address of a transmission destination device, OPC describes a command type, and OPRn describes one or more operands that modify OPC.

When the frame is a reply frame, the data field shown in FIG. 47 has a structure as shown in FIG. textHD, HDOPR, HDA
DR, OPC, and OPRn are the same as the command frame shown in FIG. 48, but in the case of a reply frame, at the end of OPRn, the type of reply (for example, “completed”, “could not be processed”, “in process”, Alternatively, a terminator (term) describing "unsupported" is added.

Next, the operation will be briefly described with reference to FIG. For example, when an operation button (not shown) of the first VTR 7 is operated and a reproduction process is instructed to the first VTR 7, the reproduction process of the first VTR 7 is started and a predetermined control signal is transmitted via the AV bus 30. It is output to the AV center 1. By this control signal, the power of the AV center 1 is turned on, and the CRT (not shown) of the AV center 1 and the speaker are internally connected to the first VTR 7.

As a result, from the first VTR 7 to the AV center 1
The video corresponding to the video signal input to the input terminal P3 of the AV center 1 is displayed on the CRT of the AV center 1, and the audio corresponding to the audio signal input to the input terminal P3 of the AV center 1 from the first VTR 7 is changed to the AV center. It is output from the first speaker.

[0018]

As described above, the conventional A
In the V system, there is a problem that not only must the AV signal line be connected to each device that constitutes the AV system, but also the AV control signal line must be connected.

The present invention has been made in view of such a situation, and a control signal can be transmitted and received between each device constituting an AV system without connecting an AV control signal line to each device. It enables you to do it.

[0020]

According to another aspect of the present invention, there is provided an electronic device control apparatus which transmits a signal by radio (for example, an infrared transmission / reception unit (transmission / reception unit) 40 in FIG. 2) and a radio signal. A receiving means (for example, the infrared transmitting / receiving unit 40 in FIG. 2) for receiving and a control means (for example, in FIG. 2) for causing the transmitting means to sequentially transmit a signal permitting signal transmission to a predetermined device constituting the AV system. TV microcomputer 74)
And is provided.

According to a ninth aspect of the present invention, there is provided an electronic device control apparatus in which transmitting means (for example, the infrared transmitting / receiving section 40 of FIG. 2) which wirelessly transmits a signal and receiving means (for example, FIG. 2 of the drawing) which receives the wireless signal. The infrared transmitter / receiver 40) and the control means (for example, the TV microcomputer 74 in FIG. 2) that causes the transmission means to transmit a signal for permitting the signal transmission to the device that has received the predetermined signal.

An electronic device control apparatus according to a tenth aspect of the present invention
The transmitting device (for example, the infrared transmitting / receiving unit 40 in FIG. 2) that wirelessly transmits a signal, the receiving unit (for example, the infrared transmitting / receiving unit 40 in FIG. 2) that receives the wireless signal, and the receiving unit are the first device. When a predetermined signal and a signal corresponding to the transmission right are received from the control unit, the transmitting unit transmits the signal corresponding to the predetermined signal and the transmission right to the second device (for example, the TV microcomputer 74 in FIG. 2). ) And are provided.

The transmitting means or the receiving means can transmit or receive a signal by infrared rays or radio waves.

It is possible to further provide a storage means (for example, the ROM 117 in FIG. 3) for storing its own device address.

Judging means (for example, the D2B microcomputer 75 in FIG. 2;
Broadcast frame storage means (for example, the D2B communication IC 76 in FIG. 2) for storing the broadcast frame may be further provided based on the determination result of the determination means.

[0026]

In the electronic equipment control apparatus according to the present invention, the signal permitting the signal transmission is transmitted to the predetermined equipment constituting the AV system in order wirelessly. Therefore, signal collision can be prevented, and efficient communication can be performed between the devices.

In the electronic device control apparatus according to the ninth aspect, a signal permitting signal transmission is wirelessly transmitted to a device that has received a predetermined signal. Therefore, signal collision can be prevented, and efficient communication can be performed between the devices.

In the electronic device control apparatus according to the tenth aspect, when a signal corresponding to the predetermined signal and the transmission right is wirelessly received from the first device, the predetermined signal and the transmission right are sent to the second device. To send a signal corresponding to. Therefore, signal collision can be prevented, and efficient communication can be performed between the devices.

[0029]

1 is a block diagram showing the configuration of an embodiment of an AV system to which the present invention is applied. AV center 1
Is a transmission / reception unit 40 that transmits and receives signals by infrared rays,
Device 1 (first VTR) 7 having input terminals P1 to P3
Is connected with the AV signal line through the input terminal P3 and the device 2
It is connected to the (second VTR) 9 via the input terminal P2. Further, the device 3 (fourth VTR) 11 and the input terminal P1
Connected through.

The devices 1 to 3 are respectively provided with transmission / reception units 41 to 43, and are configured to transmit and receive signals between the AV center 1 and each device or between each device.

The device 1 is 120H and the device 2 is 121H.
H and device 3 each have a device address of 123H.

Further, each of the devices 1 to 3 has an output terminal P1 for outputting an AV signal.

FIG. 2 is a block diagram showing the internal structure of the AV center 1. The AV center 1 includes a terrestrial video tuner 61 for selecting a predetermined channel from a radio wave received by an antenna (not shown), a BS-tuner 62 for selecting a predetermined channel for BS broadcasting, and external AV equipment. AV input terminals P1 to P3 for inputting AV signals from the
And terrestrial video tuner 61 or BS-tuner 6
VIF processing units 66 and 67 for converting the RF signal output from the unit 2 into a composite signal, and VIF processing units 66 and 6
A switch 68 is provided for selectively inputting and outputting the signal output from 7 and the signals output from the input terminals P1 to P3.

The AV center 1 also includes signal processing ICs 69 and 70 for converting composite signals into RGB signals, a TV microcomputer 74 for controlling each unit, an infrared transmitting / receiving unit 40 for transmitting / receiving infrared signals, and an infrared transmitting / receiving unit. D2B communication IC 76 that processes signals transmitted and received via the unit 40, D2B microcomputer 75 that controls the D2B communication IC 76, and CRT 7 that displays video or character information
The signal input to the signal processing IC 69 is further provided with
Therefore, after being converted into an RGB signal, it is supplied to the CRT 73 through a PIP signal conversion circuit 71 for converting a signal for PIP (Picture in Picture).

The signal input from the switch 68 to the signal processing IC 70 is converted into an RGB signal there, and then T
The signal output to the adder 72 and the signal input to the adder 72 together with the OSD (on-screen display) data supplied from the Vmicrocomputer 74 are superposed there and supplied to the CRT 73.

Further, the signal transmitted from the remote controller 20 is received by the remote controller receiving section incorporated in the TV microcomputer, and the corresponding processing is performed by the TV microcomputer 74.

FIG. 3 is a diagram showing the internal structure of the TV microcomputer 74 and the D2B microcomputer 75. TV microcomputer 7
Reference numeral 4 denotes an OSD display control processing unit 8 including a remote control receiving unit 91 and an OSD display function unit 81 for controlling OSD display.
0, an accumulator 83, a RAM 84 for storing an application program, a ROM 90 for storing a system program, and a PIO including a PIO circuit 85a.
The control processing unit 85, the SIO control processing unit 86 including the SIO circuit 86a, the interrupt control processing unit 87 including the interrupt control circuit 87a, the timer processing unit 88, and the SIO circuit 89a.
The SIO control processing unit 89 is composed of, and they are connected by a bus 92.

Also, the TV microcomputer 74 uses the font RO
A signal representing a predetermined character read from the font ROM 82 by the OSD display function unit 81 is provided.
It is supplied to the CRT 73.

Further, the SIO control processing unit 86 is adapted to transmit / receive signals to / from other ICs 122 via the serial interface (serial IF) 121.

The D2B microcomputer 75 uses the SIO circuit 110.
a SIO control processing unit 110 including a, an accumulator 111, and an RA that stores an application program
M112 and ROM 11 for storing system programs
7, an interrupt control processing unit 113 including an interrupt control circuit 113a for controlling an interrupt, a timer processing unit 114, and S
An SIO control processing unit 115 including an IO circuit 115a;
A PIO control processing unit 116 including a PIO circuit 116a is provided, and these are connected by a bus 118.

Further, the PIO control processing unit 116 receives a D signal via a parallel interface (parallel IF) 132.
Data or commands are transmitted / received to / from the 2B communication IC 76.

The signal output from the D2B communication IC 76 to the infrared transmission / reception section 40 is converted into the corresponding infrared ray and transmitted to the other AV equipment 133. On the contrary, infrared rays transmitted from other AV equipment are received by the infrared transmission / reception unit 40, converted into corresponding signals, and then the D2B communication IC 76 and the parallel IF.
It is adapted to be supplied to the D2B microcomputer 75 via 132.

The TV microcomputer 74 and the D2B microcomputer 75 are connected to the serial IF 123 and the serial IF 1
^They are connected to each other via 30 by an internal bus 140 such as an I ² C bus.

FIG. 4 is a diagram showing a frame format of data or commands transmitted / received by the transmission / reception units 40 to 43 of FIG. It is basically the same as the frame format shown in FIG. 47, except that the correction data frame is added at the end.

Information for correcting the reception error is described in the correction data frame, and if the reception error is to some extent, the reception side can correct it.

That is, in the conventional wired D2B bus system using the frame format shown in FIG. 47, a reply by an acknowledge bit is received from the destination device for each data at the time of frame transmission. , It is abolished, the reception error is detected for each frame by the correction data, and it is corrected.

Further, when a reception error that cannot be corrected by the correction data occurs, the device on the receiving side makes a retransmission request to the device on the transmitting side.

FIG. 5 is a diagram showing the structure of a transmission / reception buffer incorporated in the D2B communication IC 76 of FIG. The receiving buffer 76a stores a destination address, control bits, transmission / reception data or commands, and error correction data. This D2B communication IC 76 is provided in each device, and communication between each device is possible.

In a frame transmitted from a predetermined device and received by the transmitting / receiving unit 40 of the AV center 1, for example, the slave address thereof is the address of the AV center 1 (for example, 118H) or the address for broadcast communication (to be described later). For example, the determination unit 76c determines whether or not it is 3F8H). When it is determined that the slave address is the address of the AV center 1 or the address for broadcast communication, the AV center 1 stores the frame in the reception buffer 76a.

When a predetermined frame is transmitted to a predetermined device, the D2B microcomputer 75 temporarily stores the address of the transmission partner, CB, transmission data or command, and error correction data in the transmission buffer 76b. It Next, the data stored in this buffer is converted into the frame format shown in FIG.
Sent from 0.

Next, the operation will be described. For example, when checking whether or not a predetermined device exists in the system by the token method (transmission right passing method) described later, first, AV
A dummy command is transmitted from the center 1 to the device 1. That is, the infrared ray corresponding to the dummy command is AV
It is transmitted from the transmitting / receiving unit 40 of the center 1.

If the device 1 is present in the system, the infrared ray corresponding to this dummy command is received by the transmitter / receiver 41 of the device 1 and converted into a corresponding signal,
The infrared rays corresponding to a predetermined reply are supplied from the transmitter / receiver 41 of the device 1 to the built-in controller.

The infrared ray transmitted from the device 1 is received by the transmitting / receiving section 40 of the AV center 1 and converted into a corresponding signal. If the signal is a reply from the device 1, AV
The center 1 can recognize that the device 1 exists in the system. If the reply from the device 1 cannot be received within a predetermined time, the AV center 1 can recognize that the device 1 does not exist in the system.

Next, a method for the AV center 1 to check the connection status of each device connected in the system will be described. First, in the AV center 1, the transmitting / receiving unit 40
To the present command. This present command requests the device 2 to output a video signal or an audio signal. Also,
The AV center 1 switches the internal connection so that the AV signal input to the input terminal P2 of the AV center 1 is input to the AV center 1.

When the present command transmitted from the transmission / reception unit 40 of the AV center 1 is received by the transmission / reception unit 42 of the device 2, the device 2 generates a predetermined video signal or audio signal and outputs it from the output terminal P1. To be done. This video signal or audio signal is output from the output terminals P1 and A of the device 2.
It is supplied to the AV center 1 via the input terminal P2 of the V center 1.

As a result, the AV center 1 can recognize that the output terminal P1 of the device 2 is connected to the input terminal P2 of the AV center 1. By applying the same method to the devices 1 and 3, the connection status of those devices can be recognized. Further, the AV center 1 can store the connection status of each device recognized by the AV center 1 in a built-in storage unit, and perform internal connection switching or the like based on this information. Further, by transmitting a predetermined signal to each device and instructing a switcher incorporated in each device to switch the connection between the input and output terminals, the signal connection control between the devices can be performed.

Next, a method for transmitting / receiving data or commands having the frame format shown in FIG. 4 between the respective devices will be described.

First, referring to FIGS. 6 to 14, FIG.
As shown in, when the AV center 1 and the devices 1 to 3 are included in the system, the AV center 1 sequentially gives permission for transmission to each device (time sharing method), and A method of controlling the transfer of the control signal of 1 will be described.

In FIG. 6, first, the AV center 1
First, a signal corresponding to the transmission permission is transmitted to the device 1. The device 1, which has received the signal corresponding to the transmission permission from the AV center 1, sends the transmission data (command) to the device 3, for example. Here, the AV center 1 recognizes that the data has been transmitted from the device 1 to the device 3. This is performed by determining whether or not the data has been supplied to the determination unit 76c.

When the AV center 1 confirms that the device 1 has finished transmitting data, that is, the device 2 has stopped transmitting data, the AV center 1 sends a signal corresponding to the transmission permission to the device 2. Send. The device 2, which has received the signal corresponding to the transmission permission from the AV center 1, sends the transmission data to the device 1, for example. Here, AV center 1
Recognizes that data has been transmitted from the device 2 to the device 1. This is performed by monitoring the presence or absence of data transmission from the device 2.

When the AV center 1 confirms that the device 2 has finished transmitting data, that is, the device 2 has stopped transmitting data, the AV center 1 sends a signal corresponding to the transmission permission to the device 3. Send. The device 3 that has received the signal corresponding to the transmission permission from the AV center 1 transmits a reply to the command received from the device 1 to the device 1.

In this way, the AV center 1 transmits the signals corresponding to the transmission permission to the devices 1 to 3 in order, thereby managing the transmission of the signals within the system and preventing the collision of the transmission data. You can

FIG. 8 shows another example in the case of transmitting and receiving data or commands between the AV center 1 and each device in the system in FIG.

The AV center 1 first transmits a signal corresponding to the transmission permission to the device 1. The device 1, which has received the signal corresponding to the transmission permission, transmits the transmission data (command) to the device 3, for example. At this time, the AV center 1 confirms that the data has been transmitted from the device 1 to the device 3. This is performed by detecting the presence or absence of data transmission from the device 1.

When the AV center 1 confirms that the device 1 has completed the transmission, that is, the transmission from the device 1 has stopped, the AV center 1 transmits a signal corresponding to the transmission permission to the device 2. . The device 2 that has received the signal corresponding to the transmission permission transmits data to the AV center 1, for example. Upon receiving the data transmitted from the device 2, the AV center 1 transmits a reply to the device 2.

Next, the AV center 1 transmits a signal corresponding to the transmission permission to the device 3. The device 3, which has received the signal corresponding to the transmission permission, transmits a reply to the device 1, for example. The AV center 1 monitors this by detecting the presence or absence of data transmission from the device 3.
Then, the AV center 1 indicates that the device 3 has finished the transmission,
That is, when it is confirmed that the transmission from the device 3 has stopped, a signal corresponding to the transmission permission is transmitted to the device 1.

In this way, the AV center 1 sends out a signal corresponding to the transmission permission in the order of the devices 1, 2 and 3 so that data or commands can be simultaneously sent from a plurality of devices in the system. It is possible to prevent data collision caused by.

FIG. 7 is a diagram showing an example in which a remote control signal received by the AV center 1 for a predetermined device is transmitted from the AV center 1 to a predetermined device in the system as a remote control signal command.

First, the AV center 1 transmits a signal corresponding to the transmission permission to the device 1, for example. The device 1, which has received the signal corresponding to the transmission permission, transmits the transmission data (command) to the device 3, for example. The AV center 1 monitors this by detecting the presence or absence of data transmission from the device 1. When the AV center 1 confirms that the device 1 has completed the transmission, that is, the transmission from the device 1 has stopped, the AV center 1 originally transmits a signal corresponding to the transmission permission to the device 2. By this time, when the AV center 1 receives from the remote controller a remote control signal for the devices 1 to 3, for example, a remote control signal for controlling the device 2, the AV center 1 sends the remote control signal to the device 2 via the bus. Send in data format.

Next, the AV center 1 transmits a signal corresponding to the transmission permission to the device 2. The device 2, which has received the signal corresponding to the transmission permission from the AV center 1, transmits data to the device 1, for example. The AV center 1 monitors this by detecting the data transmitted from the device 2. When the AV center 1 confirms that the device 2 has finished transmitting data, that is, the transmission from the device 2 has stopped, the AV center 1 sends a signal corresponding to the transmission permission to the device 3.

In this way, the AV center 1 has the equipment 1,
By issuing transmission permission in the order of device 2 and device 3, AV
It is possible to prevent data collision caused by simultaneous transmission of data or commands from a plurality of devices constituting the system.

FIG. 9 shows an example when the AV center 1 sends a signal corresponding to the transmission permission and is assigned the transmission right, and the device does not transmit (there is no data to transmit for the device). It is a figure.

First, the AV center 1 transmits a signal corresponding to the transmission permission to the device 1. The device 1 that has received the signal corresponding to the transmission permission from the AV center 1 sends the transmission data (command) to the device 3, for example. This way, AV
The center 1 monitors by confirming whether or not data is transmitted from the device 1. When the AV center 1 confirms that the device 1 has completed the transmission, that is, the transmission from the device 1 has stopped, the AV center 1 transmits a signal corresponding to the transmission permission to the device 2.

Device 2 that has received the signal corresponding to the transmission permission
In this case, since there is no command or data to be transmitted, sends a signal corresponding to "no transmission" to the AV center 1. Next, the AV center 1 transmits a signal corresponding to the transmission permission to the device 3. The device 3 that has received the signal corresponding to the transmission permission sends the transmission data (reply) to the device 1. The AV center 1 monitors this by confirming the presence or absence of transmission from the device 3. AV Center 1
When it is confirmed that the device 3 has completed the transmission, that is, the transmission from the device 3 has stopped, a signal corresponding to the transmission permission is transmitted to the device 1.

In this way, the AV center 1 sends the signal corresponding to the transmission permission in the order of the device 1, the device 2, and the device 3, so that data or commands can be simultaneously received from a plurality of devices constituting the AV system. It is possible to prevent the data from colliding with each other caused by the data being transmitted.

FIG. 10 is a diagram showing an example in which the device 3 receives a frame error from the device 1.

First, the AV center 1 transmits a signal corresponding to the transmission permission to the device 1. When the device 1 receives the signal corresponding to the transmission permission sent from the AV center 1, the device 1 sends a command to the device 3, for example. The AV center 1 monitors this by detecting the presence or absence of data transmission from the device 1. Device 1 to device 3
When the AV center 1 confirms that the transmission has been completed, the AV center 1 gives a transmission permission to the device 2 by transmitting a signal corresponding to the transmission permission to the device 2.

When the device 2 receives the reception permission from the AV center 1, there is no data to be transmitted in this case.
A signal corresponding to “no transmission data” is transmitted to the center 1. Next, the AV center 1 gives a transmission permission to the device 3. When the device 3 receives the data sent from the device 1, the device 3 receives a reception error (the other party (in this case,
Since the device 1)) has made an error that can be understood), the device 1) transmits a signal corresponding to the reply notifying the reception error to the device 1.

Next, when the AV center 1 gives a transmission permission to the device 1, since the device 1 has received the reply from the device 3 notifying the reception error, the device 3 again receives the same reply. Send an instruction. The device 3 normally receives this command. Next, the AV center 1 gives a transmission permission to the device 2. When the device 2 is given a transmission permission by the AV center 1, there is no data to be sent in this case, so
A signal corresponding to “no transmission data” is transmitted to the center 1.

Next, the AV center 1 gives a transmission permission to the device 3. When the device 3 receives the transmission permission from the AV center 1, the device 3 normally receives the command transmitted from the device 1, and therefore sends a reply to the device 1. In this way, by giving the transmission permission to the device 1, the device 2, and the device 3 in order, it is possible to prevent data or commands transmitted from a plurality of devices from colliding.

FIG. 11 shows the equipment 3 which constitutes the AV system.
6 is a diagram showing an example of a case where a frame transmitted from the device 1 has a reception error (an error that the transmission partner (in this case, the device 3) cannot understand).

The device 3 cannot reply to the transmission partner when it obtains the transmission right from the AV center 1 when the transmission partner who sent the received data is unknown.
Therefore, the device 3 transmits a signal corresponding to “no transmission data” to the AV center 1. The AV center 1 recognizes that the reply to be sent from the device 3 to the device 1 is not sent. This can be done by detecting that there is no transmission from the device 3.

The AV center 1 receives from the device 3 a signal corresponding to "no transmission data", so that the device 3
Can recognize that a reception error has occurred. Therefore, the AV center 1 transmits a transmission permission to the device 1 and a resend request to the device 3. When the device 1 receives the transmission permission and the resend request for the device 3 from the AV center 1, the device 1 transmits a command to the device 3.

Next, the AV center 1 gives a transmission permission to the device 2. In this case, since there is no data to be transmitted, the device 2 transmits a signal corresponding to “no transmission data” to the AV center 1. Next, AV center 1
Gives a transmission permission to the device 3. When the device 3 receives the transmission permission, the device 3 normally receives the command from the device 1, and therefore sends a reply to the device 1.

In this way, the AV center 1 sequentially gives permission to the device 1, the device 2, and the device 3 for transmission, so that signals transmitted from a plurality of devices constituting the AV system collide. This can be prevented, and it becomes possible to manage the signal transmission / reception of each device constituting the AV center 1.

FIG. 12 shows a device 1 which constitutes an AV system.
FIG. 6 is a diagram showing an example in the case of performing broadcast communication.

First, when the AV center 1 gives a transmission permission to the device 1 by transmitting a signal corresponding to the transmission permission to the device 1, the device 1 becomes a state in which data or a command can be transmitted. Become.

In this case, the device 1 transmits a broadcast frame. A broadcast frame is a case where the device address part in the transmission frame is designated as a broadcast address (for example, 3F8H), and each device (AV
The center 1) does not need to send a reply when each device next receives transmission permission, and all devices in the system can receive the reply at the same time. However, due to the nature of not requiring a reply, the same frame is transmitted twice in order to improve the reliability of broadcast communication.

As described above, since the AV center 1 also receives this frame, it can be seen that the same frame is transmitted again. Therefore, after receiving the broadcast frame transmitted subsequently, the AV center 1 gives the transmission permission to the next device.

In this way, after the broadcast frame is transmitted from the device 1 twice, the AV center 1 gives the device 2 permission to transmit. When the device 2 receives the transmission permission from the AV center 1, the device 2 transmits a command to the device 1 in this case.

Next, the AV center 1 gives a transmission permission to the device 3. When the device 3 receives the transmission permission from the AV center 1, the device 3 transmits a command to the device 2 in this case.

In this way, the AV center 1 sequentially gives permission for transmission to the device 1, the device 2, and the device 3 so that commands or data sent from a plurality of devices constituting the AV system are You can prevent it from colliding.

FIG. 13 shows a device 1 which constitutes an AV system.
FIG. 4 is a diagram showing an example of a case where a broadcast communication including a plurality of frames (frames 1 and 2) is performed.

First, when the AV center 1 gives a transmission permission to the device 1, the device 1 becomes ready for transmission. In this case, the device 1 transmits a broadcast frame. Here, the broadcast frame 1 is transmitted twice, and then the broadcast frame 2 is transmitted twice. As a result, a total of 2 broadcast frames 1 and 2 are sent from the device 1 to all devices in the AV system.
You can send frames.

At this time, since the AV center 1 also receives the broadcast frame, the broadcast frame 1 is received twice, then the broadcast frame 2 is received twice, and then the broadcast frame is broadcast for a certain period of time. Wait for the frame to be received before granting transmission to the next device. That is, after a plurality of broadcast frames are transmitted from the device 1, the AV center 1 then gives the device 2 permission to transmit.

In this case, the device 2 to which the AV center 1 gives the transmission permission transmits the command to the device 1. Next, the AV center 1 gives a transmission permission to the device 3. A device 3 that has been given a transmission permission from the AV center 1.
Sends a command to the device 2 in this case. In this manner, the AV center 1 sequentially gives permission to the device 1, the device 2, and the device 3 to prevent the broadcast frames transmitted from a plurality of devices constituting the AV system from colliding. be able to.

FIG. 14 is a diagram showing an example when the device 1 does not exist in the AV system. $ First, AV Center 1
From, the signal corresponding to the transmission permission is transmitted to the device 1. If the device 1 exists, a command or data is transmitted from the device 1 to the predetermined device within a predetermined time, or a signal corresponding to “no transmission data” is transmitted from the AV center. Should be sent to 1.
In this case, since the device 1 does not exist, there is no signal transmission from the device 1, and therefore, the transmission data from the device 1 is not detected.

When the AV center 1 detects that there is no transmission from the device 1 for a predetermined period, it again transmits a signal corresponding to the transmission permission to the device 1. Then, it waits for a signal to be transmitted from the device 1 for a predetermined time. If no signal is transmitted from the device 1 even after repeating this process three times, the AV center 1 recognizes that the device 1 does not exist in the system.

Next, referring to FIGS. 15 to 24, FIG.
As shown in, when the AV center 1 and the devices 1 to 3 are present in the system, the AV center 1 gives a transmission permission to the device which receives the command frame or the data frame from the predetermined device ( A method of controlling transmission / reception of a control signal between devices by using the priority method) will be described.

The priority method is a method in which the AV center 1 analyzes the destination from the data transmitted from each device and gives the next transmission right to the other party to which the frame (packet) is transmitted. With this method, transfer efficiency can be improved.

FIG. 15 is a diagram showing a method of exchanging signals in an AV system including the AV center 1 and three devices.

First, the AV center 1 gives the device 1 a transmission right. In this case, the device 1 given the transmission right from the AV center 1 transmits the data to the device 3. At this time, the AV center 1 recognizes the destination device by detecting the data transmitted from the device 1 and analyzing the slave address of the data. And AV
The center 1 recognizes that the device 1 has transmitted the data to the device 3, and then gives the device 3 a transmission right.

Since the device 3 to which the transmission right is given by the AV center 1 has received the data previously transmitted from the device 1, the device 3 sends a reply to the device 1 to the device 1. By detecting and analyzing the signal corresponding to this reply, the AV center 1 can recognize that the data (reply) transmitted from the device 3 is addressed to the device 1. Therefore, A
When the transmission of data from the device 3 is completed, the V center 1 next gives the device 1 a transmission right.

Since the device 1 to which the transmission right is given by the AV center 1 has no data (command) to be transmitted in this case, a signal corresponding to "no transmission data" is sent to the AV center 1
Send to. When the AV center 1 receives a signal corresponding to “no transmission data” from the device 1, the AV center 1 gives a transmission right to the next device (device 2 in this case). In this case, the device 2 given the transmission right from the AV center 1 transmits data to the device 1.

This transmission data is monitored by the AV center 1, and when the data transmission from the device 2 is completed, A
The V center 1 gives the transmission right to the device 1 which is the destination of the data.

As described above, the AV center 1 detects and decodes the data or command transmitted from each device, recognizes the transmission destination of the data or command, and then transmits the transmission right to the transmission destination. give. If the device to which the AV center 1 has given the transmission right has no transmission data, the AV center 1 gives the transmission right to the device 1, the device 2, and the device 3 in this order. That is, when the device 1 to which the transmission right is given has no transmission data, the AV center 1 gives the transmission right to the device 2. Similarly, if the device 2 to which the transmission right is given has no transmission data, the AV center 1 gives the transmission right to the device 3. Similarly, when the device 3 to which the transmission right is given has no transmission data, the AV center 1 gives the transmission right to the device 1.

In this way, by giving the transmission right to each device by the AV center 1, it is possible to prevent the data or command transmitted from each device from colliding.

FIG. 16 is a diagram showing an example of transmitting data (command) from the peripheral devices (devices 1 to 3) connected to the AV center 1 to the AV center 1.

First, the AV center 1 gives a transmission permission to the device 1. In this case, the device 1 to which the AV center 1 gives the transmission permission transmits the command to the device 3. The AV center 1 monitors the data transmitted by the device 1, recognizes the destination of the data, and then gives a transmission permission to the device 3, which is the destination.

[0110] The device 3, when given the transmission permission from the AV center 1, transmits a reply to the device 1. The AV center 1 monitors the signal corresponding to this reply transmitted from the device 3, and recognizes that the device 3 has transmitted the data to the device 1. Therefore, the AV center 1
Next, a transmission permission is given to the device 1.

In this case, the device 1 to which the AV center 1 has given the transmission permission transmits a command or data to the AV center 1. Upon receiving the command or data transmitted from the device 1, the AV center 1 then sends back a reply to the device 1 and then gives a transmission permission to the device 1.

The device 1 to which the transmission permission is given by the AV center 1 transmits a signal corresponding to "no transmission data" to the AV center 1 if there is no data (command) to be transmitted. After receiving this data, the AV center 1
The transmission permission is given to the device 2.

As described above, the AV center 1 grants the transmission permission to each device, so that the command or data transmitted from each device can be prevented from colliding.

FIG. 17 is a diagram showing an example in which a remote control signal for controlling peripheral equipment received by the AV center 1 is transmitted from the AV center 1 to the peripheral equipment in the bus data format shown in FIG. .

First, the AV center 1 gives a transmission permission to the device 1. In this case, the device 1 given the transmission permission is
The command (data) is transmitted to the device 3. After this, AV
When the center 1 receives a remote control signal for controlling peripheral devices, the center 1 converts the signal into a bus data format and transmits it to the target device of the remote control signal, in this case, the device 2.

Further, since the AV center 1 monitors the data or command transmitted by the device 1 and recognizes that the transmission destination is the device 3, next, A
The V center 1 gives a transmission permission to the device 3.

[0117] Next, when the device 3 is permitted to transmit by the AV center 1, the device 3 sends a reply to the device 1. When the AV center 1 completes the transmission of the data (reply) by the device 3, the AV center 1 gives the device 1 a transmission permission. If there is no data to be transmitted, the device 1 to which the transmission permission is given transmits a signal corresponding to “no data to be transmitted” to the AV center 1.

When the AV center 1 receives this signal,
Transmission permission is given to the next device (device 2 in this case). When the device 2 is given a transmission permission, in this case, the device 2 sends a command to the device 3. And AV
The center 1 gives a transmission permission to the device 3. The device 3 to which the transmission permission has been given transmits a reply to the device 2.

As described above, the AV center 1 sequentially gives permission to the device 1, the device 2, and the device 3 to prevent the data or commands transmitted from a plurality of devices from colliding. can do.

FIG. 18 is a diagram showing an example in which a device having a reception error notifies the sender (destination) of the reception error. In this example, the receiving device can recognize the destination device when a reception error occurs.

First, the AV center 1 gives a transmission permission to the device 1. In this case, the device 1 to which the AV center 1 gives the transmission permission transmits the command to the device 3. At this time, if the device 3 causes a reception error, the device 3 receives the transmission permission from the AV center 1,
A reply indicating a reception error is transmitted to the device 1.

When the device 1 receives a reply from the device 3 that there is a reception error, the device 1 sends the command again to the device 3. When the device 3 normally receives the signal transmitted from the device 1, the device 3 transmits to the device 1 a reply that the signal has been normally received. Then, the device 1 is the device 3
The communication is complete when the reply sent by the sender is received. After that, the AV center 1 gives the device 1 a transmission permission. Next, since there is no data to be transmitted in this case, the device 1 transmits a signal corresponding to “no transmission data” to the AV center 1.

When the AV center 1 receives the signal corresponding to "no transmission data" transmitted from the device 1, next, the AV center 1 gives a transmission permission to the device 2.

As described above, the AV center 1 gives the transmission permission in the order of the device 1, the device 2, and the device 3, and manages the transmission right of each device.

FIG. 18 shows an example in which a reception error occurs once, but if a reception error occurs even after resending, resending is retried three times. If a reception error occurs even after three retries, the device 1 transmits a signal corresponding to the “three retries error” to the AV center 1. When the AV center 1 receives the signal corresponding to the “three times retry error” from the device 1, the AV center 1 then gives the device 2 permission to transmit.

FIG. 19 is a diagram showing an example in the case where the device that has received a reception error cannot recognize the device of the transmission source (destination).

First, the AV center 1 gives a transmission permission to the device 1. In this case, the device 1 to which the AV center 1 gives the transmission permission transmits the command to the device 3.
Here, when the device 3 causes a reception error (error that the partner device cannot recognize) and cannot recognize the command transmitted from the device 1, the device 3 receives the transmission permission from the AV center 1, A signal corresponding to “no transmission data” is transmitted to the AV center 1.

This is because the device address of the other party to which the command is transmitted cannot be recognized because the device 3 has caused a reception error, and therefore a reply is transmitted to the device 1 corresponding to the address of the other party device. Because you cannot do it.

The AV center 1 is the device 3 which has given the transmission permission.
When the signal corresponding to “no transmission data” is received from the device 3, the device 3 can recognize that the data transmitted from the device 1 has a reception error. Therefore, the AV center 1 sends a resend request to the device 1 that is the transmission source.

When the device 1 receives the resend request sent from the AV center 1, the device 1 sends the command again to the device 3. When the device 3 normally receives this command, when the AV center 1 permits the device 3 to transmit, a reply indicating that the command has been normally received is transmitted to the device 1.

Next, the AV center 1
Give permission to send. In this case, since the device 1 to which the transmission permission is given has no transmission data, the device 1 transmits a signal corresponding to “no transmission data” to the AV center 1.

When the device 3 again receives the command transmitted from the device 1, the command from the device 1 is retransmitted up to 3 times. When retransmitted three times and receiving errors all three times, the device 1 transmits a signal corresponding to the “three times retry error” to the AV center 1.

FIG. 20 is a diagram showing an example in the case of performing broadcast communication consisting of one frame by the priority method.

First, the AV center 1 gives the device 1 permission to transmit. The device 1 transmits a broadcast frame (1 frame) when the AV center 1 gives a transmission permission. As described above, in the case of broadcast communication, since the response from the partner device is not requested, it is not possible to know whether or not it was transmitted correctly. Therefore, the same frame is sent twice, and one of the frames is received correctly. I try to capture it if I can.

When the AV center 1 receives no broadcast frame from the device 1 twice and then no data is transmitted from the device 1 for a certain period of time, the AV center 1 transmits the broadcast data from the device 1. Then, the device 2 is permitted to transmit. When the device 2 receives the transmission permission from the AV center 1, the device 2 transmits a command to the device 1 in this case.

When the device 1 is given a transmission permission by the AV center 1, the device 1 sends a reply to the device 2. Next, the AV center 1 gives the device 2 permission to transmit. If there is no data to be transmitted, the device 2 to which the AV center 1 has given the transmission permission transmits a signal corresponding to “no transmission data” to the AV center 1. When the AV center 1 receives the signal corresponding to “no transmission data” from the device 2, next, the AV center 1 gives a transmission permission to the device 3.

As described above, the AV center 1 gives the transmission permission in the order of the device 1, the device 2, and the device 3, and thereby A
It is possible to prevent commands or data transmitted from a plurality of devices that make up the V system from colliding.

FIG. 21 shows an example in the case of performing a broadcast communication composed of a plurality of frames.

First, the AV center 1 gives the device 1 permission to transmit. When transmission permission is given from the AV center 1, the device 1 transmits a broadcast frame (2 frames). As described above, in the case of broadcast communication, each frame is sent twice each.

After the AV center 1 receives each frame (frames 1 and 2) of the broadcast data transmitted from the device 1 twice, and the device 1 does not transmit the data for a certain period of time, the AV center 1 Determines that there is no more broadcast data from the device 1, and then gives the device 2 permission to transmit.

When the AV center 1 gives a transmission permission to the device 2, the device 2 sends a command to the device 1 in this case. When the device 1 receives the transmission permission from the AV center 1, the device 1 sends a reply to the device 2.

As described above, the AV center 1 gives the transmission permission to the device 1, the device 2, and the device 3 in this order, thereby
It is possible to prevent commands or data transmitted from a plurality of devices that make up the V system from colliding.

FIG. 22 is a diagram showing an example in the case where a device to which transmission permission has been given causes a reception error.

First, the AV center 1 gives the device 1 permission to transmit. If a reception error occurs when the device 1 receives a signal corresponding to the transmission permission from the AV center 1, the device 1
Cannot recognize that it has been permitted to transmit, and therefore cannot transmit during the transmission period in which it should transmit.

The AV center 1 is the device 1 to which the transmission permission is given.
From the above, when recognizing that there is no transmission of data or command, the device 1 can determine that the reception of the signal corresponding to the transmission permission from the AV center 1 has received a reception error.

As a result, the AV center 1 again operates the device 1 again.
A signal corresponding to the transmission permission is transmitted to. When the device 1 normally receives the signal corresponding to the transmission permission, in this case, the command is transmitted to the device 2. And AV
The center 1 then gives the device 2 permission to transmit.

FIG. 23 is a diagram showing an example when the AV center 1 makes a reception error.

The device 1 to which the transmission permission is given by the AV center 1 transmits a command to the AV center 1, and A
When the V center 1 receives a reception error, the AV center 1 again gives permission for transmission to the device 1 and sends a retransmission request.

When the device 1 receives the resend request from the AV center 1, it again sends the command to the AV center 1.

FIG. 24 is a diagram showing an example in the case where, for example, the device 1 does not exist in the AV system.

First, the AV center 1 transmits a signal corresponding to the transmission permission to the device 1 (not existing). AV
The center 1 confirms that no data or command is transmitted from the device 1, and again transmits a signal corresponding to the transmission permission to the device 1.

Even if this is repeated a plurality of times (for example, three times), if no data or command is transmitted from the device 1, the AV center 1 determines that the device 1 does not exist.

In the time sharing method and the priority method described above, when each device obtains the transmission right and then transmits the data or command, the transmission right is automatically extinguished. On the other hand, next, in the token method described with reference to FIGS. 25 to 43, the transmission right (token)
Returns the transmission right to the AV center 1 when the receiving device has the data and the receiving device does not have the data to be transmitted.

FIG. 25 shows an AV system including an AV center 1 and devices 1 to 3, as shown in FIG. 1, in which each device sends a command frame or a data frame and a transmission right ( FIG. 6 is a diagram showing an example of a case where a device that transmits a token and receives the token transmits a data frame or a command frame and a token (the token method) to perform communication between the devices.

First, the AV center 1 gives a transmission permission to the device 1. When the device 1 is given the transmission permission, in this case, the device 1 transmits the command and the transmission right to the device 3. Upon receiving the command and the transmission right from the device 1, the device 3 transmits the reply and the transmission right to the device 1. The device 1 returns the transmission right to the AV center 1 when there is no data or command to transmit. The AV center 1 then sends the transmission right returned from the device 1 to the device 2.

Upon receipt of the transmission right from the AV center 1, the device 2 sends the command and the transmission right to the device 3 in this case. The device 3 sends a reply and a transmission right to the device 2. next,
If there is no data to be transmitted, the device 2 returns the transmission right to the AV center 1. The AV center 1 then sends the transmission right to the device 3.

As described above, the device to which the transmission right is given,
When there is no data to be transmitted, the AV center 1 gives the transmission right to the device 1, the device 2, and the device 3 in this order, so that data or commands or the transmission right are transmitted from a plurality of devices constituting the AV system, and they collide. You can avoid doing that.

FIG. 26 is a diagram showing an example in the case of sending a command not requesting a reply from the partner device which sent the command.

First, the AV center 1 sends a transmission right to the device 1. The device 1 sends to the device 3 a command that does not require a reply to the device 3. In this case, since the reply from the device 3 is unnecessary, the transmission right is not sent. After this, device 1
May send the transmission right to a device other than the device 3, but in this example, the inquiry command and the transmission right are sent to the device 3 and the reply is waited for.

Upon receipt of the inquiry command and the transmission right from the device 1, the device 3 sends back a reply to the command to the device 1 together with the transmission right.

Upon receiving the reply and the transmission right from the device 3, the device 1 returns the transmission right to the AV center 1 in this case because it has no other command to send.

FIG. 27 is a diagram showing an example in which data, commands, or transmission rights are transmitted from each device constituting the system to the AV center 1.

First, the AV center 1 sends a token (transmission right) to the device 1. Upon receiving the transmission right, the device 1 sends the command and the transmission right to the other party (device 3) that the device (device 1) transmits. Next, when the device 3 receives the command and the transmission right from the device 1, the device 3 returns a reply to the command together with the transmission right to the destination (device 1). Then, the device 1 sends a command and a transmission right to the AV center 1.

Upon receiving the command from the device 1, the AV center 1 returns a reply to the command together with the transmission right to the device 1. Upon receiving the reply transmitted from the AV center 1, the device 1 returns the transmission right to the AV center 1 because there is no command or data to transmit in this case.

Upon receiving the transmission right transmitted from the device 1, the AV center 1 sends the transmission right to the device 1, the device 2, and the device 3 in this order. In this case, the transmission right is sent to the device 2. Equipment 2
When receiving the transmission right, sends the command and the transmission right to the device 3 in this case. When the device 3 receives the command from the device 2,
It is returned to the other party (device 2) that sent it.

When the device 2 receives the reply and the transmission right from the device 3, if there is no data or command to be transmitted,
The transmission right is returned to the AV center 1.

FIG. 28 is a diagram showing an example in which the AV center 1 receives a remote control signal for a peripheral device, converts the remote control signal into a bus data format, and transmits the bus data format to a predetermined device.

First, the AV center 1 sends a transmission right to the device 1. Upon receiving the transmission right transmitted from the AV center 1, the device 1 sends a command and a transmission right to the device 3 in this case. At this time, when the AV center 1 receives a remote control signal for a peripheral device (for example, the device 2) from the remote control 20, the AV center 1 converts this remote control signal into a bus data format and sends it to the AV center 1. Hold until you receive.

On the other hand, when the device 3 receives the command and the transmission right transmitted from the device 1, it returns a reply to the command together with the transmission right to the destination (device 1). In this case, since there is no data to be transmitted, the device 1 returns the transmission right to the AV center 1.

Upon receiving the transmission right transmitted from the device 1, the AV center 1 transmits the signal corresponding to the remote control signal converted into the held bus data format to the device 2 together with the transmission right. When the device 2 receives the remote control signal converted into the bus format and the transmission right transmitted from the AV center 1, the device 2 only returns to the AV center 1 that it has received.

Next, the device 2 sends a command and a token (transmission right) to the device 3. Upon receiving the command, the device 3 side sends a reply and transmission right (device 2)
Reply to. When the device 2 receives the reply and there is no data or command to be transmitted, the device 2 sets the transmission right to AV.
Return to center 1.

FIG. 29 is a diagram showing an example in the case where each device constituting the AV system is given a transmission right and there is no data or command to be transmitted.

First, the AV center 1 sends a transmission right to the device 1. Upon receiving the transmission right transmitted from the AV center 1, the device 1 returns the transmission right to the AV center 1 in this case because there is no data to transmit. Upon receiving the transmission right transmitted from the device 1, the AV center 1 next receives the device 2
Send the right to send. When receiving the transmission right, the device 2 returns the transmission right to the AV center 1 in this case because there is no data to be transmitted. The AV center 1 that has received the transmission right from the device 2 then transmits the transmission right to the device 3.

In this case, the device 3 sends a command and a transmission right to the device 2. The device 2 receives the command and the transmission right transmitted from the device 3, and sends the reply and the transmission right to the command to the device 3. The device 3, which has received the reply transmitted from the device 2, returns the transmission right to the AV center 1 because there is no data or command to be transmitted in this case.

FIG. 30 is a diagram showing an example in which a reception error occurs when a command transmitted from each device constituting the AV system is received.

In this example, the receiving side receives the address of the partner device and the transmission right, but the received data cannot be received normally, and a reply indicating that a reception error has occurred and a token are sent back to the partner device.

First, the AV center 1 sends a transmission right to the device 1. When the device 1 receives the transmission right, in this case,
A command and a transmission right are sent to the device 3. At this time, if the device 3 receives a reception error, a reply that the reception error has occurred is sent to the partner device (the device 1 in this case) together with the transmission right. The device 1 receiving this reply again sends the same command and transmission right to the device 3.

When the device 3 normally receives the command and the transmission right transmitted from the device 1, the device 3 replies to the device 1 that the command has been normally received, but when the device 3 again receives an error, A reply that a reception error has occurred is sent to the device 1. The retransmission of the command and the transmission right from the device 1 to the device 3 is repeated a maximum of three times, and when the third receiving error occurs, when the device 1 receives a reply from the device 3 that the receiving error occurs, exceptional processing is performed.

FIG. 31 is a diagram showing an example of this exception processing.

First, the AV center 1 sends a transmission right to the device 1. When the device 1 receives the transmission right, it sends a command and a transmission right to the device 3. At this time, if the device 3 receives a reception error, it sends a reply to the partner device (the device 1 in this case) that there is a reception error. The device 1 receiving this reply sends the same command and transmission right again to the device 3.

When the device 3 again receives a reception error, it sends a reply to the device 1 that the reception error has occurred. Retransmission of commands and transmission rights from the device 1 to the device 3
If it is repeated up to three times and the third error occurs, the device 1
Transmits a signal corresponding to “three times transmission error” to the AV center 1.

In FIG. 32, when a command transmitted from each device constituting the AV system is received, a reception error occurs and the receiving side cannot recognize the partner device address.
It is a figure which shows the example in case a reply cannot be returned.

First, the AV center 1 sends a transmission right to the device 1. In this case, the device 1 that has received the transmission right sends a command to the device 3. When the device 3 receiving the command transmitted from the device 1 causes a reception error and the address of the partner (sender) device (in this case, the device 1) cannot be recognized, the device 3 notifies the partner device (device 1). I cannot tell that there was a reception error.

The device 1 waits for a reply from the device 3 for the command transmitted to the device 3 for a predetermined time, and then the device 3
If the reply is not sent from, the command is sent to the device 3 again. After this, if no reply is sent as well,
The command is retransmitted to the device 3 up to three times. Even if the command is retransmitted three times, if a reply is not sent from the device 3, exception processing as described later is performed.

When the device 1 retransmits the command to the device 3, and the device 3 normally receives the command, the device 3 determines that the device 1 has received the command.
To the AV center 1 when there is no data to be transmitted, the device 1 returns the transmission right to the AV center 1. The AV center 1 to which the transmission right is returned by the device 1, then gives the transmission right to the device 2.

FIG. 33 is a diagram showing an example of exception processing in the case where a retransmission error occurs three times.

First, the AV center 1 sends a transmission right to the device 1. In this case, the device 1 sends a command and a transmission right to the device 3. At this time, the device 3 causes a reception error,
If the device 3 cannot recognize the partner device (the device 1 in this case) due to this error, the device 3 cannot notify the partner device (device 1) that a reception error has occurred.

The device 1 waits for a reply from the transmission partner (device 3) for a predetermined time, and if the reply is not sent from the device 3, sends the command and the transmission right to the device 3 again.
After that, if there is no reply from the device 3, the command and the transmission right are retransmitted up to three times. As a result, when the reply is not transmitted from the device 3, the device 1 reports to the AV center 1 that there is a transmission error three times, and returns the transmission right to the AV center 1.

FIG. 34 is a diagram showing an example of performing broadcast communication by the token method. Also in this example, the broadcast communication by the time sharing method shown in FIG.
As in the case of broadcast by the priority method shown in 0,
The broadcast frame sends the same frame twice, and enhances reliability when transmitting the broadcast frame to each device constituting the AV system without requesting a reply from the partner device.

Therefore, when the receiving side receives the same frame twice, if either frame can be received correctly,
Capture the frame and do not send a reply to the source device.

First, the AV center 1 sends a transmission right to the device 1. The device 1 performs broadcast communication, and transmits a broadcast frame made up of a command or data twice to all other devices constituting the AV system. Next, the device 1 gives the transmission right A
Return to V Center 1.

Next, the AV center 1 sends the transmission right to the device 2, and in this case, the device 2 sends the command and the transmission right to the device 3.
Send to. The device 3 sends a reply to the command received from the device 2 and a transmission right to the device 2. The device 2 is
Since there is no data to be transmitted, the transmission right is returned to the AV center 1.

As described above, the device to which the transmission right is transmitted is
If there is no data to be transmitted, the transmission right is returned to the AV center 1. The AV center 1 that has received the transmission right transmits the transmission right to the device 1, the device 2, and the device 3 in this order.

FIG. 35 is a diagram showing an example of transmitting broadcast data composed of a plurality of frames. In this example, as in the case of the time sharing method shown in FIG. 13, the broadcast frame transmits the same frame twice, without requiring a reply from the partner (destination) device. , Which enables reliable communication.

The receiving side receiving the broadcast frame receives the same frame twice since the same frame is continuously transmitted twice from the partner (source) device, and either one of the frames is correctly received. If it can be received, only the frame that was correctly received is captured, and no reply is sent to the other device. When transmitting a broadcast frame, no transmission right is transmitted.

First, the AV center 1 sends a transmission right to the device 1. When the device 1 receives the transmission right, the device 1 performs broadcast communication and transmits the same command or data twice to all other devices. In this case, the broadcast data consists of two broadcast frames (frames 1 and 2),
First, the broadcast frame 1 is transmitted twice, and then the broadcast frame 2 is transmitted twice. After that, the device 1 returns the transmission right to the AV center 1.

Next, the AV center 1 sends the transmission right to the device 2, and in this case, the device 2 sends the command and the transmission right to the device 1. The device 1 sends a reply and a transmission right to the device 2. Since the device 2 has no data to transmit, the device 2 returns the transmission right to the AV center 1.

As described above, the device that has no data to send returns the transmission right to the AV center 1. A is sent back
The V-center 1 transmits the transmission right to each device in the order of the device 1, the device 2, and the device 3.

FIG. 36 is a diagram showing an example of transmitting pure data to a scramble unit for pay broadcasting or transmitting OSD display data. In this case, it does not request a reply from the destination as when sending a command.

FIG. 37 is a diagram showing an example in the case of sending pure data composed of a plurality of frames. In this case, first, AV
The center 1 transmits a transmission right to the device 1. next,
In this case, the device 1 transmits to the device 2 the first frame forming the pure data and then the next frame forming the pure data. Then, the device 1 returns the transmission right to the AV center 1. Device A returned the transmission right A
The V device then transmits the transmission right to the device 2.

FIG. 38 is a diagram showing an example of a recovery method when a reception error occurs when receiving the transmission right.

First, the AV center 1 sends a transmission right to the device 1. When the device 1 receives a transmission right and causes a reception error and cannot receive the transmission right, the device 1
I cannot send a signal within the predetermined time that I should. Since this state is monitored by the AV center 1, the AV center 1 can recognize that the device 1 could not correctly receive the transmission right.

Then, the AV center 1 sends the transmission right to the device 1 again. In this way, if there is no transmission from the device 1 even after retrying a plurality of times (for example, three times),
The AV center 1 can display an OSD or the like to warn the user.

Further, this processing is performed by an upper processing layer (for example, an application program). For example, when performing system setting initialization setting or the like to check the presence or absence of the counterpart device, it will be described later with reference to FIG. Like this, even if the transmission right is transmitted to a predetermined device multiple times,
When there is no reply from the partner device, it is determined that the partner device does not exist.

FIG. 39 is a diagram showing an example in which a reception error occurs when the AV center 1 receives the transmission right.

First, the AV center 1 sends a transmission right to the device 1. Next, the device 1 returns the transmission right to the AV center 1 because there is no data to be transmitted. AV center 1
Fails to receive the transmission right transmitted from the device 1 and cannot receive the signal from the device 1. In this case, A
The V center 1 retransmits the transmission right to the device 1. Upon receiving the transmission right transmitted from the AV center 1, the device 1 returns the transmission right to the AV center 1 again because there is no data to be transmitted in this case. Then, in this case, the AV center 1 normally receives the transmission right transmitted from the device 1.

FIG. 40 is a diagram showing an example in the case where each device works normally in FIG. 38 or FIG.

First, the transmission right is transmitted from the AV center 1 to the device 1. Next, in this case, the device 1 returns the transmission right to the AV center 1 because there is no data to be transmitted. The AV center 1 to which the transmission right is returned from the device 1, then transmits the transmission right to the device 2. In this case, the device 2 transmits the command and the transmission right to the device 3. The device 3 normally receives the command and the transmission right transmitted from the device 2.

FIG. 41 is a diagram showing an example in which a reception error occurs when the transmission right is received, and the reception fails even after retrying a plurality of times.

First, when the transmission right is sent from the AV center 1 to the device 1, if the device 1 cannot receive the transmission right, the device 1 must transmit within the predetermined period to be transmitted by itself. I can't. This state is monitored by the AV center 1, and the AV center 1 recognizes that the transmission right has not been correctly received by the device 1.

Therefore, the AV center 1 sends the transmission right to the device 1 again. In this way, multiple times (eg 3
If this state (the state in which there is no transmission from the device 1) is not recovered even after retrying, the AV center 1 recognizes that the device 1 does not exist or is defective.

Also, this processing is determined by the upper processing layer,
For example, when performing system setting initialization setting or the like to check the presence or absence of the counterpart device, for example, a warning is displayed and appropriate processing is performed by the upper processing layer.

FIG. 42 is a diagram showing an example of a case where a transmission error and a command are received from the AV center 1 and a reception error occurs, and the command fails even after retrying a plurality of times.

First, if the AV center 1 sends a command and a transmission right to the device 1 and the device 1 cannot receive the command and the transmission right, the device 1 cannot send during the period in which it should send. . This state is monitored by the AV center 1, and the AV center 1 can recognize that the device 1 could not correctly receive the transmission right. Therefore, the AV center 1 sends the command and the transmission right to the device 1 again.

In this way, a plurality of times (for example, three times)
If this state is not recovered even after retrying, the AV center 1 can recognize that the device 1 does not exist or is defective.

Further, this processing is determined by the upper processing layer,
For example, when performing system setting initialization setting or the like to check the presence or absence of the counterpart device, for example, a warning is displayed and appropriate processing is performed by the upper processing layer.

FIG. 43 is a diagram showing an example of a case where a reception error occurs when the transmission right is received from the AV center 1, and the transmission fails even after retrying a plurality of times.

First, when the AV center 1 transmits the transmission right to the device 1, the device 1 causes a reception error and cannot correctly receive the transmission right. In this case, device 1
Sends a reply that the reception error occurred and the transmission right to the destination (AV center 1). As a result, the AV center 1 recognizes that the device 1 could not correctly receive the transmission right,
The transmission right is sent again to the device 1.

In this way, a plurality of times (for example, three times)
If this state is not recovered even after retrying, the AV center 1 can recognize that a reception error has occurred when the device 1 receives the transmission right.

The D2B microcomputer 75 may be provided with an OSD display processing section to supply a signal corresponding to the OSD to the CRT 73.

[0221]

As described above, according to the electronic device control method and device of the present invention, each device constituting the AV system wirelessly transmits a signal in a predetermined order. Therefore, it is possible to prevent a collision of signals transmitted from each device, and it is possible to perform efficient communication between each device.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of an embodiment of an AV system to which the present invention is applied.

FIG. 2 is a block diagram showing a configuration diagram in a TV.

FIG. 3 is a block diagram showing a configuration diagram of a microcomputer in the TV.

FIG. 4 is a diagram showing a format of transmission / reception data.

FIG. 5 is a diagram showing a structure of a transmission / reception buffer.

FIG. 6 is a diagram showing transmission / reception of a control signal of each device in the AV system by the time sharing method.

FIG. 7 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(When the AV center 1 receives a remote control signal and sends it to a peripheral device)

FIG. 8 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(Example of sending from the peripheral device to the AV center 1)

FIG. 9 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(Example when peripheral device does not have information to be transmitted even if transmission permission is given)

FIG. 10 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(In the case of a reception error, an example of notifying a reception error when replying)

FIG. 11 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(Example of a case where a reply cannot be sent if there is a reception error)

FIG. 12 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the time sharing method.
(Example of broadcast communication)

FIG. 13 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(Example of transmitting multiple frames (2 frames) in broadcast communication)

FIG. 14 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the time sharing method.
(When device 1 does not exist)

FIG. 15 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method.

FIG. 16 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (Example of sending from the peripheral device to the AV center 1)

FIG. 17 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (When the AV center 1 receives a remote control signal and sends it to a peripheral device)

FIG. 18 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (Example of notifying reception error when replying)

FIG. 19 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (Example where a reception error cannot be returned)

FIG. 20 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (Example of broadcast communication)

FIG. 21 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (Example of broadcast communication consisting of multiple frames (2 frames))

FIG. 22 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (When the device 1 receives an error)

FIG. 23 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (When the AV center 1 receives an error)

FIG. 24 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the priority method. (When there is no other device)

FIG. 25 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method.

FIG. 26 is a diagram showing behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of a command that only sends and does not request a reply, if you can find out the status of the other party by an inquiry command afterwards)

FIG. 27 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of communication from peripheral equipment to AV center 1)

FIG. 28 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of the case where the AV center 1 receives a remote control for peripheral equipment and transmits its command to the equipment)

FIG. 29 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example when there is no data (command) to be transmitted by the device that has the transmission right)

FIG. 30 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of notifying reception error when replying)

FIG. 31 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of notifying reception error when replying, example of three resending errors)

FIG. 32 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example where you cannot reply)

FIG. 33 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of not being able to reply, example of error resending 3 times)

FIG. 34 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of broadcast communication (1 frame communication))

FIG. 35 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of broadcast communication consisting of multiple frames (2 frames))

FIG. 36 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of sending / receiving pure data that is not a command such as OSD display data / transparent transfer data)

FIG. 37 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (Example of sending and receiving pure data that is not a command such as OSD display data of multiple frames / transparent transfer data)

FIG. 38 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system according to the token method. (When the device 1 receives an error)

FIG. 39 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (When the AV center 1 receives an error)

FIG. 40 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method.

FIG. 41 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (When device 1 does not exist)

FIG. 42 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (When the device 1 does not exist, such as when the system is initialized)

FIG. 43 is a diagram showing the behavior of control signal transmission / reception of each device in the AV system by the token method. (When error occurs multiple times (when token is received))

[Fig. 44] Fig. 44 is a diagram illustrating a configuration of an example of a maximum configuration diagram including an audio device. (Only AV signal lines are shown in the figure below)

FIG. 45 is a diagram showing an example of an AV control signal line connection diagram. (Only the AV control signal line is displayed)

[Fig. 46] Fig. 46 is a diagram illustrating the configuration of an example of a system centered on a TV (AV center 1).

[Fig. 47] Fig. 47 is a diagram illustrating the format of transmission data of S-D2B (D2B-ver.2.0).

[Fig. 48] Fig. 48 is a diagram illustrating an example of a data field of transmission data of S-D2B.

[Fig. 49] Fig. 49 is a diagram illustrating another example of the data field of the transmission data of S-D2B.

[Explanation of symbols]

 1 TV (AV Center 1) 2 Audio Amplifier 3 Audio Tuner 4 Compact Disc 5 Mini Disc 6 Tape Recorder 7 1st VTR 8 3rd VTR 9 2nd VTR 10 Video Tuner 11 4th VTR 12 Multi Disc Player (MDP) 20 Remote Controller 30 AV Bus ( D2B bus) 40, 41, 42, 43 Transmitting / receiving unit 61 Terrestrial video tuner 62 BS tuner 66, 67 VIF processing unit 68 Switching device 69, 70 Signal processing IC 71 PIP signal conversion circuit 72 Adder 73 CRT 74 TV microcomputer 75 D2B microcomputer 76 D2B communication IC 80 OSD display control processing unit 81 OSD display function unit 82 Font ROM 83 Accumulator 84 RAM 85 PIO control processing unit 85a PIO circuit 86 SIO control processing unit 6a SIO circuit 87 interrupt control processing unit 87a interrupt control circuit 88 timer processing unit 89 SIO control processing unit 89a SIO circuit 90 ROM 91 remote control receiving unit 92 bus 110 SIO control circuit 110a SIO circuit 111 accumulator 112 RAM 113 interrupt control processing Unit 113a Interrupt control circuit 114 Timer processing unit 115 SIO control processing unit 115a SIO circuit 116 PIO control processing unit 116a PIO circuit 120, 121, 132 Parallel interface 122 Other IC 123, 130, 131 Serial interface 133 Other AV equipment

Claims (13)

[Claims] 1. An electronic device control method for controlling transmission / reception of a signal between electronic devices in an electronic device system comprising a plurality of electronic devices, wherein one of the electronic devices is a center device, and An electronic device control method, wherein a signal permitting signal transmission is wirelessly transmitted to predetermined electronic devices constituting an electronic device system in order. 2. An electronic device control method for controlling signal transmission / reception between electronic devices in an electronic device system comprising a plurality of electronic devices, wherein one of the electronic devices is a center device and a predetermined device is used. An electronic device control method comprising wirelessly transmitting a signal for permitting signal transmission to a device that has received the signal. 3. An electronic device control method for controlling transmission / reception of a signal between electronic devices in an electronic device system comprising a plurality of electronic devices, comprising: responding to a predetermined signal and a transmission right from a first electronic device. The electronic device control method, wherein the electronic device that receives the signal transmits a predetermined signal and a signal corresponding to the transmission right to the second electronic device by radio. 4. The electronic device control method according to claim 1, wherein the device transmits and receives the signal by infrared rays or radio waves. 5. The electronic device control method according to claim 1, wherein the signal comprises at least a master address, a slave address, data, and error correction data. 6. The device has a unique address, determines whether the slave address of the received signal is the same as the address, and based on the determination result, receives the signal in the reception buffer. The electronic device control method according to claim 5, wherein the electronic device control method is stored in. 7. The device each has a broadcast address for receiving a broadcast frame, determines whether the slave address of the received signal is the same as the broadcast address, and determines whether the slave address of the received signal is the same as the determination result. 7. The electronic device control method according to claim 5, wherein the signal is stored in the reception buffer based on the above. 8. A transmitting means for transmitting a signal by radio, a receiving means for receiving a signal by radio, and a signal for permitting the transmission of the signal to the predetermined equipment constituting the AV system in order to the transmitting means. An electronic device control device comprising: 9. A transmitting means for transmitting a signal by radio, a receiving means for receiving a signal by radio, and a control means for causing the transmitting means to transmit a signal permitting signal transmission to a device that has received a predetermined signal. An electronic device control device comprising: 10. A transmitting means for transmitting a signal by radio, a receiving means for receiving a signal by radio, and a receiving means for receiving a predetermined signal and a signal corresponding to a transmission right from the first device, An electronic device control apparatus comprising: a control unit that causes the transmission unit to transmit a predetermined signal and a signal corresponding to a transmission right to the second device. 11. The transmitting means or the receiving means,
11. The electronic device control apparatus according to claim 8, wherein the signal is transmitted or received by infrared rays or radio waves. 12. The electronic device control apparatus according to claim 8, further comprising a storage unit that stores its own device address. 13. The system further comprises: determining means for determining whether or not the signal is a broadcast frame; and broadcast frame storage means for storing the broadcast frame based on the determination result of the determining means. 13. The electronic device control device according to claim 8, wherein the electronic device control device is an electronic device control device.