EP0997022A1

EP0997022A1 - Method and apparatus for setting connections between a number of information processing apparatuses

Info

Publication number: EP0997022A1
Application number: EP99919544A
Authority: EP
Inventors: Junji Sony Corp. KATO; Michio Sony Corp. MIYANO
Original assignee: Sony Corp
Current assignee: Sony Corp
Priority date: 1998-05-12
Filing date: 1999-05-12
Publication date: 2000-05-03
Also published as: KR20010021719A; TW427086B; WO1999059309A1

Abstract

An apparatus and method for connecting a number of information processing apparatuses together in a desired manner in which each information processing apparatus is connected to a network. Signals may be formed which represent a graphical interface for display on a display unit. Such graphical interface may indicate available connections between the information processing apparatuses connected to the network. A user may select a desired connection by use of the graphical interface, whereupon a control signal may be formed therefrom. The desired connection between the corresponding information processing apparatuses may be established in accordance with the control signal. As a result, an input/output connection setting or settings of information processing apparatuses coupled to a network may be easily performed.

Description

DESCRIPTION

METHOD AND APPARATUS FOR SETTING CONNECTIONS BETWEEN A NUMBER OF INFORMATION PROCESS_¬ ING APPARATUSES ^

TECHNICAL FIELP

The present invention relates to a connection setting apparatus and method and, more particularly, to such apparatus and method wherein a data input/output connection setting or settings between a number of information apparatuses connected to a network can be easily performed.

BACKGROUND ART

A number of information processing apparatuses, including video tape recorders (VTRs) having a digital interface, integrated type digital VTRs, hard disk drives (HDDs) for recording image and sound data, and Mini Disk (trademark) (MD) devices may be arranged in a number of different arrangements. Such products may be capable of one-to-one connections between two devices and may be incapable of an expandable or multiple-type of connection arrangement.

However, other information processing apparatuses may have a digital interface operable in accordance with a predetermined standard, such as an IEEE 1394 protocol, such

that a plurality of information processing apparatuses can be connected. In such arrangement, data may be transmitted between any two ofthe plurality of information processing apparatuses connected to an IEEE 1394 serial bus by selecting a predetermined one of these apparatuses_. However, for data input/output between information processing apparatuses having such digital interface which may be freely selected, a connection setting operation may need to be performed in each ofthe information processing apparatuses. Performing such connection setting operation may be time consuming and/or troublesome for the user.

Television receivers, personal computers, network terminals and/or the above-mentioned information processing apparatuses may be connected by use of a digital interface so as to form a home network. In such home network, if a user wishes to connect a plurality ofthe devices so as to enable data transfer between desired ones of such devices, the user may have to perform the above-mentioned time consuming and/or troublesome setting operation.

DTSCLSURE OF THE TNVENTTON

An object ofthe present invention is to enable an information processing apparatus coupled to a network having a plurality of information processing apparatuses coupled thereto to be operated so as to perform input/output connection setting 42 ofthe other information processing apparatuses connected to the network. In accordance with an aspect ofthe present invention, an apparatus is provided for connecting a number of information processing apparatuses together in a desired manner in

which each information processing apparatus is connected to a digital bus. The apparatus comprises a device for generating a signal representative of a graphical interface for display on a display unit which indicates any available connections between the information processing apparatuses connected to the digital bus, a device for receiving signals from a user indicative of a desired connection selected from among the available connections indicated on the graphical , interface and for forming a control signal therefrom, and a device for generating a signal for

causing the desired connection between the corresponding information processing apparatuses to be established in accordance with the control signal. In accordance with another aspect ofthe present invention, an apparatus is provided for connecting a number of information processing apparatuses together in a desired manner in which each information processing apparatus is connected to a digital bus. The apparatus comprises a device for generating a signal representative of a graphical interface for display on a display unit which indicates the information processing apparatuses connected to the digital bus; a device for receiving a desired connection signal indicative of a desired connection between corresponding information processing apparatuses and for forming a

control signal therefrom, in which the desired connection signal is obtained from an input provided by a user with the use ofthe graphical interface; and a device for generating a signal for causing the desired connection between the corresponding information processing apparatuses to be established in accordance with the control signal.

Other objects, features and advantages according to the present invention will

become apparent from the following detailed description of illustrated embodiments when read in connection with the accompanying drawings in which corresponding components are identified by the same reference numerals.

BRTEF DESCRIPTION OF THE DRAWTNGS

Fig. 1 is a diagram of a system in accordance with an embodiment ofthe present invention; Fig. 2 is a diagram of a connection manager ofthe system of Fig. 1;

Fig. 3 is a functional diagram ofthe connection manager of Fig. 2;

Fig. 4 is a diagram of a cycle structure of data transmission between devices connected in accordance with IEEE 1394; Fig. 5 is a diagram to which reference will be made in explaining a structure of address space of CSR architecture;

Fig. 6 is a diagram to which reference will be made in explaining locations, names and functions of essential CSRs; Fig. 7 is a diagram of a ROM format;

Fig. 8 is a diagram of "bus_info_block", "root_directory" and "unit directory";

Fig. 9 is a diagram of an arrangement of plug control registers (PCRs);

Figs. 10A to 10D are diagrams of configurations for oMPR, oPCR iMPR, and iPCR; Fig. 11 is a diagram of plugs, plug control registers and isochronous channels;

Fig. 12 is a flowchart to which reference will be made in explaining an

input/output setting operation;

Fig. 13 is a diagram of an arrangement of an ID-device table;

Fig. 14 is a diagram of an arrangement of a node-ID table; Fig. 15 is a diagram of a graphic interface for input/output connection

designation;

Fig. 16 is a flowchart to which reference will be made in explaining an operation

for checking whether a device conforms to LEC 61883;

Fig. 17 is a flowchart to which reference will be made in explaining an input/output connection operation;

Fig. 18 is a flowchart to which reference will be made in explaining a cancellation of input/output connection operation; Fig. 19 is a diagram of a graphic interface for input/output connection designation which indicates that a VTR and a set-top box cannot be connected to each other due to a difference in signal formats;

Fig. 20 is a diagram of a graphic interface for input/output connection designation; and

Fig. 21 is a diagram of an arrangement of an ID-name table.

REST MODE FOR CARRYING OUT THE INVENTION

An embodiment ofthe present invention will now be described. Fig. 1 illustrates a network 99 having a connection manager 1, an HDD 4, a

VTR 5, an integrated digital video camera/recorder 6, and a set-top box 7 which are connected to each other by buses 9-1 to 9-4 which may be IEEE 1394 serial buses. That is, in the network 99, a digital interface in accordance with IEEE 1394 may be used for connecting these information processing apparatuses. A remote controller 2 is adaptable to receive input commands from a user by use of crisscross keys or ten cluster keys contained on the remote controller and to transmit an infrared light signal corresponding thereto. The connection manager 1 may receive the infrared light signal transmitted from the remote controller 2 and control the information processing apparatuses or devices connected to the network 99 in accordance with an input/output connection command represented by the received light signal. Additionally, the connection

manager 1 may supply an output signal to a monitor 3 so as to cause information to be

displayed thereon such as information pertaining to the kinds and/or the names ofthe

manufacturers ofthe devices connected to the network 99, information about a data format usable by the devices, information indicating the state of an input/output connection(s) between the devices, and so forth.

The devices shown in Fig. 1 may form or be considered nodes or accessible units in accordance with a prescription of LEEE 1394 and in accordance with TEC 61883 prescribing audio visual (AV) data transmission on IEEE 1394. In other words, devices which do not conform to a predetermined standard such as LEC 61883 may not be controlled by the connection manager 1.

Fig. 2 illustrates internal sections ofthe connection manager 1. An infrared signal receiving section 11 may receive the infrared light signal transmitted from the remote controller 2, demodulate the received infrared light signal to obtain a control signal, and transfer the control signal to a central processing unit (CPU) 12 via an internal bus 18. The CPU 12 may

determine control contents based on a program stored in a read-only memory (ROM) 16 from the control signal and information stored in a random-access memory (RAM) 13 about the states ofthe devices connected by LEEE 1394, and may control the connected devices through an interface 14.

The ROM 16 may have stored therein the program used by the CPU 12 and fixed data which may be utilized in calculation parameters. The RAM 13 may have stored

therein parameters ofthe program used by the CPU 12, parameters ofthe states ofthe devices

connected by LEEE 1394, and so forth, which may be suitably changed during the execution of the program. The interface 14 may be an input/output interface in accordance with LEEE 1394 to which the IEEE 1394 serial buses 9-1 and 9-3 are connected.

A monitor control section 15 may receive data from the CPU 12 or stored data from the RAM 13, may convert the same into a video signal, and may supply the video signal to the monitor 3 so as to be displayed thereon. An electrically erasable programmable read-only memory (EEPROM) 17 may be utilized to store company names and device names corresponding to company identification codes (LDs) and chip LDs, and other information which should be stored even after power is turned off.

Functional sections ofthe connection manager 1 realized when the CPU 12 executes the above-mentioned program are illustrated in Fig. 3. A device name setting section 21 may set names previously stored or inputted by a user to the devices identified with node identification codes (LDs) connected to the network 99. An input/output connection setting section 22 may input settings of input/output connections ofthe devices connected to the network 99. An input/output connection setting execution section 23 may execute a setting of input/output connections ofthe devices connected to the network 99 based on the device input/output connection setting inputted by the input/output connection setting section 22. A display control section 24 may cause to be displayed on the monitor 3 information needed from a user to input a necessary or respective setting, such as information pertaining to the state of input/output connections ofthe devices connected to the network 99. An input/output connection state memory section 25 may store therein information pertaining to the state of input/output connections ofthe devices connected to the network 99. A device function checking section 26 may ascertain whether each ofthe devices connected to the network has a predetermined function such as a function operable in accordance with LEC 1883.

A cycle structure of data transmission between the devices connected in accordance with LEEE 1394 is illustrated in Fig. 4. As indicated therein, in LEEE 1394, data may be divided into packets and transmitted in a time division manner based on a cycle of 125 ms. Such cycle may be produced by a cycle start signal supplied from a node having a cycle master function (which may be one ofthe devices shown in Fig. 1). A band or time unit for transmission of isochronous packets may be secured from the start of each cycle. In isochronous transmission, data may be transmitted in a certain time period, however, transmitted data may be lost if a transmission error occurs since no procedure for protecting or recovering the data is provided. During the time period in each cycle in which isochronous communication is not performed, some ofthe nodes which have secured the bus as a result of arbitration may transmit asynchronous packets. In asynchronous transmission, an acknowledgement signal may be sent to the transmitting device to acknowledge receipt ofthe data and, in the absence thereof, the transmitting device may re-send the data. Alternatively, if data has not been properly received, the receiving device may send a retry signal to the transmitting device whereupon the transmitting device may re-send the data. As a result, reliable data transmission may be provided. However, in asynchronous transmission, transmission timing may not be constant.

If certain nodes perform isochronous transmission, these nodes should be compatible with an isochronous function and at least one of such nodes should have a cycle master function. Further, at least one ofthe nodes connected to the LEEE 1394 serial buses 9-1 to 9-4 should have an isochronous resource manager function.

LEEE 1394 conforms to the control and status register (CSR) architecture which has a 64-bit address space and which is prescribed in ISO/LEC13213 or ANSI/LEEE1212. The structure ofthe CSR architecture address space is illustrated in Fig. 5. In such structure, the upper 16 bits form a node LD representing one ofthe LEEE 1394 nodes and the other 48 bits are used to designate address space assigned to the node. The upper 16 bits are separated into a bus

LD of 10 bits and a physical or node LD of 6 bits. Since the case in which all ofthe bits are set to 1 is reserved for a special purpose, 1023 buses and 63 nodes can be designated.

In the 256 terabyte address space prescribed with the lower 48 bits, the space prescribed with the upper 20 bits is divided into an initial register space used for registers specific to 2048-byte CSRs, registers specific to IEEE 1394, and the like, a private space, an initial memory space, and so forth, while the space prescribed with the lower 28 bits is used as a configuration read-only memory (ROM), an initial unit space for use specific to the nodes, plug control registers (PCRs), such as defined in LEC 61883, and so forth, if an initial register space is prescribed with the upper 20 bits.

Offset addresses, names and functions of essential CSRs are illustrated in Fig. 6. The offsets shown in Fig. 6 are addresses offset from address FFFFFOOOOOOOh (in which "h" denotes hexadecimal notation) from the start ofthe initial register space.

A bandwidth available register having offset 220h indicates a band assignable to isochronous communication. Only the value ofthe bandwidth available register with respect to

the node operating as an isochronous resource manager is valid. That is, each node may have the CSRs shown in Fig. 5, but only the bandwidth available register ofthe isochronous resource manager may be effective. In other words, basically, only the isochronous resource manager has the bandwidth available register. In the bandwidth available register, a maximum value may be stored when no band is assigned for isochronous communication and the value may be reduced each time a band is assigned.

Channel available registers having offsets 224h to 228h respectively have bits

corresponding to channel numbers 0 to 63. A bit having a value of zero may indicate that the corresponding channel has been assigned. Only the channel available registers ofthe node operating as an isochronous resource manager are effective.

Returning to Fig. 5, a configuration ROM based on a read-only memory (ROM)

format is placed or arranged from address 400h to address 800h. An example of such ROM format is illustrated in Fig. 7. Each ofthe nodes which is an access unit on LEEE 1394 can

contain a plurality of units which operate independently while using the address space in common. "Unit directories" may designate software version or locations with respect to these units. Although the locations of "bus_info_block" and "root_directory" may be fixed, the locations ofthe other blocks may be designated by offset addresses.

Details ofthe "bus_info_block", "root_directory" and "unit_directory" are illustrated in Fig. 8. An LD number indicating a manufacturer of a device may be stored in "Company lD" ofthe "Bus_info_block". An ID unique to the device (which is only assigned to the respective device) may be stored in "ChipJLD" ofthe "Bus info block". For a device

conforming to the LEC 61883 standard, in "unit_spec_id" ofthe "Unit_directory", "OOh" is written as the first octet, " AOh" is written as the second octet, and "2Dh" is written as the third octet. Further, in "unit_sw_version", "Olh" is written as the first octet and "1" is written as the least significant bit (LSB) ofthe third octet.

For device input/output control through the interface, each node has plug control registers (PCRs) with addresses 900h to 9FFh in the initial unit space shown in Fig. 5. This may be substantiation ofthe "plug" concept for formation of a signal path logically analogous to an analog interface. An arrangement ofthe PCRs is illustrated in Fig. 9. As shown therein, the PCRs may include an output plug control register (oPCR) representing an output plug, an input plug control register (iPCR) representing an input plug, an output master plug register (oMPR) and an input master plug register (iMPR) indicating information about output and input plugs specific to the device. Each device may have a single oMPR and a single iMPR, but may have a plurality of oPCRs and a plurality of iPCRs corresponding to the plugs according to the

capacity ofthe device. In the arrangement of Fig. 9, there are thirty one oPCRs and thirty one iPCRs. The flow of isochronous data may be controlled by operating the registers corresponding to the plugs. Configurations of oMPR, oPCR, iMPR, and iPCR are respectively illustrated in Figs. 10A-10D.

A code indicating the maximum transmission rate at which the corresponding device can transmit or receive data may be stored in the 2-bit "data rate capability" portion located in the most significant bit (MSB) side ofthe oMPR and iMPR. The number of a channel used for a broadcast output may be stored in the 6-bit "broadcast channel base" ofthe oMPR. A value indicating the number of output plugs ofthe device (that is, the number of oPCRs) may be stored in the 5-bit "number of output plugs" on the LSB side ofthe oMPR. A value indicating the number of input plugs ofthe device (that is, the number of iPCRs) may be stored in the 5-bit "number of input plugs" on the LSB side ofthe iMPR. The 3-bit reserved portion and the 8-bit "non-persistent extension field" and 8-bit "persistent extension field" are reserved or defined for future use.

The 1-bit "on-line" portion on the MSB side ofthe oPCR and the iPCR may indicate the state of use ofthe plug. For example, a value of 1 may indicate an ON-LINE state ofthe plug, and a value of 0 may indicate an OFF-LINE state ofthe plug. The 1-bit "broadcast connection counter" ofthe oPCR and the iPCR may indicate a broadcast connection state. For example, a value of 1 may indicate a broadcast connection exists and a value of 0 may indicate a broadcast connection does not exist. The 6-bit "point-to-point connection counter" ofthe

oPCR and the iPCR may indicate the number of point-to-point connections ofthe plug. The 6- bit "channel number" ofthe oPCR and the iPCR may indicate the number of an isochronous channel to which the plug is connected. The 2-bit "data rate" portion ofthe oPCR may indicate the actual transmission rate of isochronous data packets supplied from the plug. A 4-bit

"overhead ID" portion ofthe oPCR may have a code stored therein which indicates an overhead bandwidth for isochronous communication. The 10-bit "payload" portion ofthe oPCR may indicate the maximum value of data which may be contained in isochronous packets and/or which may be handled by the plug. The reserved portions are reserved for future or other use.

Fig. 11 illustrates a relationship between plugs, plug control registers and isochronous channels. As shown therein, AV-devices 31-1 to 31-3 are connected to each other by a LEEE 1394 serial bus. The AV-device 31-3 may supply isochronous data to channel #1 of the LEEE 1394 serial bus which was designated by oPCR[l] of oPCR[0], oPCR[l] and oPCR[2], which are prescribed with respect to the number and the transmission rate with the oMPR ofthe

AV-device 31-3. The AV-device 27-1 may read the isochronous data supplied to designated

channel #1 ofthe LEEE 1394 serial bus through iPCR[0] of iPCR[0] and iPCR[l] which are prescribed with respect to the number and the transmission rate with the iMPR ofthe

AV-device 31-1. Similarly, the AV-device 31-2 may supply isochronous data to channel #2 which was designated by oPCR[0], and the AV-device 31-1 may read the isochronous data from designated channel #2 through iPCR[l].

An input/output connection setting operation for a device connected to the network 99 having the connection manager 1 and other devices in accordance with a number of

predetermined standards (such as LEEE 1394 and LEC 61883) will now be described with reference to Fig. 12. As previously indicated, the connection manager 1 may include the device name setting section 21 (Fig. 3). Such section may have stored therein a previously formed ID-device table which may indicate company IDs, chip LDs, and names ofthe devices

connected to the network. An example of an arrangement ofthe LD-device table is illustrated in

Fig. 13.

In step SI 1, a user may connect a device to the network 99 using a cable in

accordance with a predetermined standard (LEEE 1394 serial bus). Processing may proceed to step S12 wherein bus resetting may be automatically performed by a bus initialization function in the physical layer of each node so as to execute a bus reconfiguration. With such reconfiguration, a node LD is reassigned to each node.

In step SI 3, the device function checking section 26 (Fig. 3) may determine whether the newly connected device conforms to a predetermined standard such as LEC 61883 or LEC 1883.

Thereafter, processing may proceed to step S14 wherein the device name setting section 21 (Fig. 3) may successively read out the company LDs and chip LDs ofthe nodes to form a node-LD reference table ofthe company LDs, the chip LDs, and the node LDs ofthe nodes. An example of such node-LD reference table having company LDs, chip LDs, and node LDs ofthe nodes is illustrated in Fig. 14.

Processing may then proceed to step S15 wherein the device name setting

section 21 may form an LD-device reference table ofthe company IDs, the chip LDs and the device names. In step S16, the display control section 24 (Fig. 3) may read out the name ofthe newly connected device from the device name setting section 21 and may cause such name to be displayed on the monitor 3. Upon viewing such display, the user may, if necessary, revise or

input the name ofthe device to the device name setting section 21 by operation ofthe remote

controller 2. This new input may be recorded in the LD-device table. In step SI 7, the user may input a command to perform an input/output connection setting operation by use ofthe remote controller 2 (Fig. 1). As a result, the input/output connection setting input section 22 (Fig. 3) may cause a graphic interface for an input/output connection designation to be displayed on the monitor 3. While observing such displayed graphic interface, the user may input a desired input/output connection setting by operating the remote controller 2. Such connection setting may conform to a predetermined standard, such as LEC 61883.

In step SI 8, the input/output connection setting execution section 23 (Fig. 3) may perform processing pertaining to an input/output connection or cancellation of a predetermined one ofthe nodes based on an input/output connection setting instruction obtained in step SI 7. The state ofthe network 99 after execution of such processing pertaining to the input/output connection or cancellation ofthe predetermined node may be stored in the input/output connection memory section 25 (Fig. 3).

Therefore, in the present invention, a connection setting for any or all ofthe

devices of a network may be performed by use ofthe connection manager 1 as described above. As is to be appreciated, by using the present invention, a desired connection setting(s) of a device(s) may be performed without operating the respective device(s).

An example of a graphic interface ofthe input/output connection designation of step S17 (Fig. 12) is illustrated in Fig. 15. Cells 30-1 to 30-4 arranged in the uppermost horizontal row represent the output plugs of several devices (such as a camera/recorder, a set top box, a video tape recorder, and hard disk drive). Cells 32-1 to 32-4 in the leftmost column represent the input plugs ofthe devices. The cell located at the intersection ofthe column containing one ofthe output plug cells and the row containing one ofthe input plug cells represents the state of connection between the respective output plug and the respective input plug, wherein single cross-hatching, shading or the like in a cell may indicate a connection between corresponding plugs and the absence thereof may indicate that such connection has not been established. For example, cell 34 represents the state of connection between the output

plug ofthe set-top box 7 and the input plug ofthe VTR 5. In the arrangement shown in Fig. 15,

cell 34 indicates that the output plug ofthe set-top box 7 is connected to the input plug ofthe VTR 5. As another example, cell 35 represents the state of connection between the output plug ofthe HDD 4 and the input plug ofthe camera/recorder 6 and, in the arrangement shown in Fig. 15, cell 35 indicates that the output plug ofthe HDD 4 is connected to the input plug ofthe camera/recorder 6. In the graphic interface example of Fig. 15, the empty cells indicate that the respective connection is possible but has not been established. Further, the double cross- hatching in a cell indicates that a connection between the corresponding plugs may not be possible. As such, in the example of Fig. 15, since the devices appear in the same order from left to right in the horizontal row of output plug cells and as from top to bottom in the vertical column of input plug cells, the resulting display is a diagonal line between the left top corner and the right bottom corner of double cross-hatching which indicates that corresponding connections may not be possible.

An operation ofthe device function checking section 26 (Fig. 3) for determining

whether a device conforms to predetermined standard such as LEC 61883 will now be described with reference to Fig. 16. For a device conforming to the LEC 61883 standard, in

"unit_spec_id" of "unit_directory", "OOh" may be written as the first octet, " AOh" may be written as the second octet, and "2Dh" may be written as the third octet. Further, in "unit_sw_version" for the device conforming to LEC 1883, "Olh" may be written as the first octet and "1" may be written as the LSB ofthe third octet. From such values, it may be

possible to determine whether a device conforms to LEC 1883.

In step S21, the device function checking section 26 may read "unit_spec_id" and "unit_sw_version" in "unit_directory" for a newly connected device. Processing may then proceed to step S22. In step S22, the device function checking section 26 may determine whether the first to third octets of "unit_spec_id" are OOh, AOh, and 2Dh, respectively, and whether the first octet and the LSB ofthe third octet of "unit_sw_version" are Olh and 1, respectively. If the result of such determination is affirmative (that is, that the first to third octets of "unit spec id" are OOh, AOh, and 2Dh, respectively, and that the first octet and the LSB ofthe third octet of "unit_sw_version" are Olh and 1, respectively), processing may proceed to step S23.

In step S23, the device function checking section 26 may read out the number of output plugs and the number of input plugs ofthe newly connected device. Thereafter, the processing may be terminated. Alternatively, step 23 may be omitted, whereupon if the result

ofthe determination of step S22 is affirmative, processing may be terminated.

If the result ofthe determination in step S22 is negative, processing may proceed to step S24. In step S24, processing for a device which does not conform to LEC 61883 may be performed.

Based on the above-described processing, the connection manager 1 may perform input/output setting operations exclusively for the devices conforming to LEC 61883 and having plug control registers.

An operation for providing input/output connections in step S18 (Fig. 12) by the input/output connection setting execution section 23 (Fig. 3) will now be described with

reference to Fig. 17. In step S31, the input/output connection setting execution section 23 demands or requests that the node operating as an isochronous manager (for example, set-top box 7) acquire an isochronous communication channel. In response to such demand, the node operating as an

isochronous manager sets "0" for the bit ofthe channel available register(s) in the CSRs which

corresponds to an unoccupied channel(s). Processing may then proceed to step S32. In step S32, the input/output connection setting execution section 23 demands that the node operating as an isochronous manager acquire a necessary isochronous communication band or time period. In response to such demand, the node operating as an isochronous manager subtracts the value ofthe demanded band from the value ofthe bandwidth available register in the CSRs. Processing may then proceed to step S33.

In step S33, the input/output connection setting execution section 23 causes the input device designated by the user in step S17 (Fig. 12) to select an unused one ofthe iPCRs

(iPCRβ]), to set the number ofthe isochronous channel to be used (that is, the number ofthe channel acquired in step S31) in the iPCR[j], and to set " 1 " in the point-to-point connection counter (Fig. 10).

In step S34, the input/output connection setting execution section 23 causes the output device designated by the user to select an unused one ofthe oPCRs (oPCR[k]), to set in the oPCR[k] the same isochronous channel number as that set in the iPCR[j], and to set "1" in the point-to-point connection counter. Upon securing the channel, band, and output and input plugs as described above, data may be transmitted from the output plug ofthe designated output device to the input plug ofthe designated input device by using the secured channel and band.

An operation of input/output connection cancellation processing performed by the input/output connection setting execution section 23 (Fig. 3) after the completion of data transmission will now be described with reference to Fig. 18.

In step S41, the input/output connection setting execution section 23 may clear

the "channel number" and "point-to-point connection counter" of oPCR[k] ofthe output device designated by the user so as to release or place the oPCR[k] in an unused or available state. Processing may then proceed to step S42. In step S42, the input/output connection setting execution section 23 clears "channel number" and "point-to-point connection counter" of iPCR[k] ofthe input device designated by the user to release or place the iPCR[k] in an unused or available state. Processing may then proceed to step S43. In step S43, the input/output connection setting execution section 23 demands that the node operating as an isochronous resource manager set free the necessary isochronous communication band. In response to this demand, the node operating as an isochronous resource manager adds a predetermined value according to the band to be set free to the value ofthe bandwidth available register in the CSRs. Processing may then proceed to step S44. In step S44, the input/output connection setting execution section 23 demands that the node operating as an isochronous resource manager set free the isochronous communication channel. In response to this demand, the node operating as an isochronous resource manager may set the bit corresponding to the channel available registers in the CSRs to a value of " 1 ". Thereafter, processing may be terminated. When performing the checking processing of step S13 (Fig. 12), the device function checking section 26 (Fig. 3) may inquire or request ofthe plug of each device an outputtable signal format by the Input/Output Plug Signal Format Command in the AV/C

Digital Interface Command Set in a predetermined standard (such as LEC 61883). If the obtained signal format information indicates different formats between a number of devices, the connection manager 1 may cause a notice to be provided to the user which advises the user not to establish a connection between the respective iPCRs and oPCRs thereof or may prevent the user from selecting a connection therebetween by use ofthe graphic interface for input/output

connection designation on the monitor 3. Fig. 19 illustrates an example of a graphic interface for input/output connection designation in which the user is advised that the VTR 5 and the set-top box 7 cannot be connected to each other due to a difference in signal formats or non- compliance with a predetermined standard or the like. (See double cross-hatching in cells 97

and 98.)

Although indicated in Fig. 19 with double cross-hatching, cells for indicating that a connection may not be established due to a difference in signal formats, non-compliance with a predetermined standard and so forth may be displayed in a color different from that of the other cells. Alternatively, other arrangements may be utilized to differentiate between cells which indicate that a connection may not be establish and those which indicate that a

connection may be establish. Another example of a graphic interface for input/output connection designation is illustrated in Fig. 20. In this example, icons and names of devices may be displayed. By use of this display, the user may input an instruction for a desired connection between devices by performing a mouse-type operation which may be similar to a connection operation of input and output plugs of analog devices. For example, the user may drag a pointer from a desired signal output device (such as VTR 5) to a desired signal input device (such as camera 6) by use of a mouse device which may be included in the remote controller 2 (Fig. 1). Upon dragging the pointer, an image 96 of a cable and an icon 95 indicating a signal input/output direction may be displayed.

An example of an arrangement of an ID-name table in the device name setting section 21 which may be used to obtain a device name from company LDs and chip IDs is

illustrated in Fig. 21. The LD-name table may include names of manufacturers corresponding to

company LDs and product category names corresponding to chip IDs. The data in this table may have been previously recorded in a memory medium such as EEPROM 17 (Fig. 2) which may be capable of maintaining such data in the absence of a normal power supply. The device name setting section 21 may temporarily set a device name on the basis of a name read out from the LD-name table. As an example, in the situation in which "1" is read out as a company ID for a newly connected device and "2" is read out as a chip LD for the device, the device name setting section 21 may combine the name "SONY" (corresponding to the company LD " 1 ") and the name "VTR" (corresponding to the chip LD "2") to obtain the name " SONY VTR"

for the device.

To avoid the possibility of providing the same name to different devices, a number may be added after the end of each name letter sequence. For example, if no information (company LD and chip LD) is obtained from a device, the device name setting section 21 may read out the name "DEVICE" from the LD-name table and the user may add "01 " to it to obtain "DEVICE01 " as the device name. If the same information is read from different devices, the device name setting section 21 may temporarily set a name obtained by adding together a name read out from the LD-name table and a numeral sequence different from numeral sequences already used in device names. For example, in the situation wherein "DEVICE01 " and "DEVICE02" have already been used as device names, the device name setting section 21 may automatically set "DEVICE03" temporarily for a newly added device. This setting method may also be used for devices for which company LDs and chip LDs can be

read.

The connection manager 1 may be provided with a user interface for changing

the contents ofthe LD-name table and the user interface for changing a device name temporarily set into a different letter sequence as described above. These interfaces enable the user to easily and immediately set a desired device name in the connection manager 1.

As described above, the connection manager 1 enables the user to easily and quickly perform a desired connection setting or settings between a number of information processing apparatuses connected in a network, whereupon data may be transferred therebetween.

The remote controller 2 may be a mouse or a keyboard or any device which enables a signal formed from a user input to be supplied to the connection manager 1. Although the connection manager 1 has been described as being a separate device, the present invention is not so limited. Alternatively, the functions ofthe connection manager may be included within another device (such as VTR 5).

Although various information items have been described as being displayed on the monitor 3, the present invention is not so limited. Alternatively, such items may be

displayed on a front panel ofthe connection manager 1, a display panel ofthe remote controller

2, or the like.

The results of input/output connection setting performed by the connection manager 1 with respect to the nodes ofthe network may be displayed on an input/output connection designation graphic interface. The input/output connection designation graphic interface may be formed so that an output plug and an input plug may be repeatedly connected to the limit of LEEE 1394 channels and bands.

Additionally, the connection manager 1 may be adapted to store input/output connection conditions in a memory such as RAM 13 (Fig. 2) at predetermined time intervals or after the occurrence of a predetermined event or the like so as to enable such connection conditions to be restored after the occurrence of a bus reset which may be caused by the connection of an additional device to the bus or the like. That is, after the occurrence of a bus reset, the connection manager may automatically read the stored connection information and perform reconnection processing so as to re-establish the connection conditions which existed

before the bus reset. A computer program for performing the above-described processing may be provided in communication mediums such as those involving a network and a satellite as well in a recording medium such as a magnetic disk, a compact-disk read-only memory (CD-ROM) and a solid state memory. Therefore, the present invention enables an input/output setting or settings between a number of information processing apparatuses connected to a network to be

performed by use of one information processing apparatus. As a result, an input/output setting or settings of apparatuses connected to the network can be performed easily and efficiently. Further, the present invention conforms or operates in accordance with a number of predetermined standards, such as LEEE1394 and LEC61883.

Although preferred embodiments ofthe present invention and modifications thereof have been described in detail herein, it is to be understood that this invention is not limited to these embodiments and modifications, and that other modifications and variations may be effected by one skilled in the art without departing from the spirit and scope ofthe invention as defined by the appended claims.

TNDUSTRTAT, APPI JCABT ITY

As described above, an information processing apparatus and an information processing method according to this invention respectively are applied to preferably a home

network connecting Video Tape Recorder (VTR), an all-in one video system, Hard Disk Drive

(HDD) for recording video data and audio data etc. thereto.

Claims

CLAIMES

1 An information processing apparatus connected to a network together with a number of other information processing apparatuses, said information processing apparatus comprising unique information obtaining means for obtaining unique information ofthe information processing apparatuses on said network;

connection instruction inputting means for generating signals representative of a user interface for display on a display unit based upon said unique information and for inputting a connection instruction for at least one of said information processing apparatuses; and connection setting execution means for setting a connection from or to the at least one of said information processing apparatuses based on said connection instruction from said connection instruction inputting means

2 An information processing apparatus according to claim 1, wherein said network is a bus interface 3 An information processing apparatus according to claim 1, wherein said information apparatus is an audio/visual apparatus

4 An information processing apparatus according to claim 2, further comprising self identification (ID) inputting means for inputting self IDs outputted from each of said information processing apparatuses on said network when a bus reset of said network occurs,

and means for obtaining a number of said other apparatuses based upon said self IDs

5 An information processing apparatus according to claim 4, wherein each of said information processing apparatuses includes storing means for storing at least unique numbers designating a manufacturer ofthe respective information processing apparatus, and wherein said unique information obtaining means obtains said at least unique numbers as said unique information from said storing means.

6. An information processing apparatus according to claim 5, further comprising means for obtaining names corresponding to said information processing apparatuses from each of said unique numbers, and wherein said connection instruction inputting means includes means for generating signals representative of said names for display on said display unit.

7. An information processing apparatus according to claim 1, wherein said

connection instruction inputting means includes means for generating signals representative of a status ofthe connection set by said connection setting execution means for display on said

display unit.

8. An information processing apparatus according to claim 1, wherein said connection instruction inputting means includes means for generating signals representative of said information processing apparatuses on said network as icons for display on said display unit and means for associating a first one of said icons to a second one of said icons on said display unit in accordance with said connection instruction.

9. An information processing apparatus according to claim 1, further comprising apparatus name setting means for setting names to said information processing apparatuses connected to the network.

10. An information processing apparatus according to claim 1, further

comprising format checking means for checking a format of data which can be input or output by a first information processing apparatus or a second information processing apparatus on said network, and wherein said connection setting execution means sets a connection between said first information processing apparatus and said second information processing apparatus if the format of data which can be output from said first information processing apparatus and the format of data which can be input to said second information processing apparatus are similar.

11. An information processing apparatus according to claim 1, further comprising function checking means for checking whether a respective one or ones of said information processing apparatuses on said network has a predetermined data transmission

function.

12. An information processing apparatus according to claim 11, wherein the information processing apparatuses with said predetermined data transmission function have predetermined data stored in storing means, and wherein said function checking means checks whether the respective one or ones of said information processing apparatuses have said

predetermined data.

13. An information processing apparatus according to claim 1, further comprising connection status storing means for storing connection status of said network before a bus reset on the network, and wherein said connection setting executing means sets a connection based upon said connection status in said connection status storing means after said

bus reset.

14. An information processing apparatus according to claim 1, wherein said connection setting execution means sets at least two connections between a first information processing apparatus and a second information processing apparatus in accordance with a respective connection instruction from said connection instruction inputting means corresponding to a connection arrangement between said first information processing apparatus and said second information processing apparatus.

15. A connection establishing method for an information processing apparatus connected to a network together with a number of other information processing apparatuses, said method comprising the steps of: obtaining unique information ofthe information processing apparatuses on said network; displaying a user interface based upon said unique information; inputting a connection instruction for at least one of said information processing

apparatuses; and setting a connection from or to the at least one of said information processing apparatuses based on said connection instruction.

16. A connection establishing method according to claim 15, wherein said network is a bus interface.

17. An connection establishing method according to claim 15, wherein said information apparatus is an audio/visual apparatus.

18. A connection establishing method according to claim 15, further comprising the steps of inputting self identifications (LDs) outputted from each of said information

processing apparatuses when a bus reset of said network occurs, and obtaining a number of said information processing apparatuses based upon said self LDs.

19. A connection establishing method according to claim 18, wherein each of said information processing apparatuses includes storing means for storing at least unique

numbers designating a manufacturer ofthe respective information processing apparatuses, and wherein said step of obtaining unique information obtains said at least unique numbers as said unique information from said storing means.

20. A connection establishing method according to claim 19, further comprising the step of obtaining names corresponding to said information processing apparatuses from each of said unique numbers, and wherein said step of displaying a user interface includes displaying said names.

21. A connection establishing method according to claim 15, further comprising the step of displaying connecting status of said network.

22. A connection establishing method according to claim 15, wherein said step of displaying a user interface includes displaying each of said information processing apparatuses on said network as an icon, and wherein the step of inputting a connection instruction includes associating a first one of said icons to a second one of said icons.

23. A connection establishing method according to claim 15, further comprising

the step of setting names to said information processing apparatuses on the network.

24. A connection establishing method according to claim 15, further comprising the step of checking a format of data which can be input or output by a first information processing apparatus or a second information processing apparatus on said network, and wherein the setting step sets a connection between said first information processing apparatus and said second information processing apparatus if the format of data which can be output from said first information processing apparatus and the format of data which can be input to said second information processing apparatus are similar.

25. A connection establishing method according to claim 15, f rther comprising

the step of checking whether a respective one or ones of said information processing apparatuses on said network has a predetermined data transmission function.

26. A connection establishing according to claim 25, wherein the information processing apparatuses with said predetermined data transmission function have predetermined data stored in storing means, and wherein the checking step checks whether the respective one or ones of said information processing apparatus have said predetermined data.

27. A connection establishing method according to claim 15, further comprising the step of storing connection status of said network before a bus reset on said network, and wherein the setting step sets a connection based upon the stored connection status after said bus reset.

28. A connection establishing method according to claim 15, wherein the setting step sets at least two connections between a first information processing apparatus and a second information processing apparatus on said network in accordance with a respective connection instruction for a connection between said first information processing apparatus and said second information processing apparatus.

29. An information processing apparatus adapted to be connected to a digital bus to which first and second information processing apparatuses are connected, in which a connection has not been established between the first information processing apparatus and the second information processing apparatus, said apparatus comprising: connection instruction inputting means for inputting a connection instruction

representative of a connection between the first information processing apparatus and the second information processing apparatus on said bus; and connection setting means for outputting a control signal of said connection instruction to said first information processing apparatus and said second information processing apparatus and for establishing a connection between said first information processing apparatus and said second information processing apparatus.

30. An information processing apparatus according to claim 29, further

comprising format checking means for checking a format of data which can be input or output by said first information processing apparatus or said second information processing apparatus, and wherein said connection setting means sets said connection between said first information processing apparatus and said second information processing apparatus if the format of data which can be output from said first information processing apparatus and the format of data which can be input to said second information processing apparatus are similar.

31. An information processing apparatus according to claim 29, further comprising function checking means for checking whether a respective one or ones ofthe

information processing apparatuses on said bus has a predetermined data transmission function.

32. An information processing apparatus according to claim 31, wherein the information processing apparatuses on said bus with said predetermined data transmission function have predetermined data stored in storing means, and wherein said function checking means checks whether the respective one or ones ofthe information processing apparatuses have said predetermined data.

33. An information processing apparatus according to claim 29, further comprising connection status storing means for storing a status of said connection between said first information processing apparatus and said second information processing apparatus before a bus reset on said bus, and wherein said connection setting means sets a connection based upon said status in said connection status storing means after said bus reset.

34. An information processing apparatus according to claim 29, wherein said connection setting means establishes at least two connections between said first information

processing apparatus and said second information processing apparatus.

35. A connection establishing method for an information processing apparatus adapted to be connected to a digital bus to which first and second information processing apparatuses are connected, in which a connection has not been established between the first information processing apparatus and the second information processing apparatus, said method comprising the step of: inputting a connection instruction representative of a connection between the first information processing apparatus and the second information apparatus information processing apparatus on said bus; and establishing said connection by outputting a control signal of said connection instruction to said first information processing apparatus and said second information processing apparatus.

36. A connection establishing method according to claim 35, further comprising the step of checking a format of data which can be input or output by said first information processing apparatus or said second information processing apparatus, and wherein the setting step sets said connection if the format of data which can be output from said first information processing apparatus and the format of data which can be input to said second information processing apparatus are similar.

37. A connection establishing method according to claim 35, further comprising the step of checking weather a respective one or ones ofthe information processing apparatuses on said bus has a predetermined data transmission function.

38. A connection establishing method according to claim 37, wherein the information processing apparatuses on said bus with said predetermined data transmission function have predetermined data stored in storing means, and wherein the checking step checks whether the respective one or ones ofthe information processing apparatus have said predetermined data.

39. A connection establishing method according to claim 35, further comprising the step of storing a status of said connection between said first information apparatus and said second information apparatus before a bus reset on said bus, and wherein the setting step sets a connection based upon said status after said bus reset.

40. A connection establishing method according to claim 35, wherein the setting step sets at least two connections between said first information processing apparatus and said second information processing apparatus.

41. An information processing apparatus according to claim 1, wherein said bus interface is an LEEE 1394 bus interface.

42. A connection establishing method according to claim 16, wherein said bus interface is an LEEE 1394 bus interface.

43. An apparatus for connecting a number of information processing apparatuses together in a desired manner in which each information processing apparatus is connected to a digital bus, said apparatus comprising: means for generating a signal representative of a graphical interface for display on a display unit which indicates any available connections between the information processing apparatuses connected to said digital bus; means for receiving signals from a user indicative of a desired connection selected from among the available connections indicated on said graphical interface and for forming a control signal therefrom; and means for generating a signal for causing the desired connection between the corresponding information processing apparatuses to be established in accordance with said

control signal.

44. An apparatus according to claim 43, wherein said digital bus is an LEEE 1394

bus.

45. An apparatus according to claim 43, wherein the graphical interface further indicates a non-available connection or connections between the information processing apparatuses connected to said digital bus.

46. An apparatus according to claim 43, wherein the graphical interface has a matrix-like arrangement of rows and columns so as to form a plurality of cells in which the information processing apparatuses connected to said digital bus are identified in a row and a column and in which the available connections are identifiable from the cell or cells corresponding thereto.

47. A method for connecting a number of information processing apparatuses together in a desired manner in which each information processing apparatus is connected to a digital bus, said method comprising the steps of:

generating a signal representative of a graphical interface for display on a display unit which indicates any available connections between the information processing apparatuses connected to said digital bus; receiving signals from a user indicative of a desired connection selected from among the available connections indicated on said graphical interface and forming a control signal therefrom; and generating a signal for causing the desired connection between the corresponding information processing apparatuses to be established in accordance with said

control signal.

48. A method according to claim 47, wherein said digital bus is an IEEE 1394 bus.

49. A method according to claim 47, wherein the graphical interface further indicates a non-available connection or connections between the information processing apparatuses connected to said digital bus.

50. A method according to claim 47, wherein the graphical interface has a matrix-like arrangement of rows and columns so as to form a plurality of cells in which the information processing apparatuses connected to said digital bus are identified in a row and a column and in which the available connections are identifiable from the cell or cells corresponding thereto.

51. An apparatus for connecting a number of information processing apparatuses together in a desired manner in which each information processing apparatus is connected to a digital bus, said apparatus comprising: means for generating a signal representative of a graphical interface for display on a display unit which indicates the information processing apparatuses connected to said digital bus; means for receiving a desired connection signal indicative of a desired connection between corresponding information processing apparatuses and for forming a control signal therefrom, in which the desired connection signal is obtained from an input provided by a user with the use of said graphical interface; and means for generating a signal for causing the desired connection between the corresponding information processing apparatuses to be established in accordance with said control signal.

52. An apparatus according to claim 51, wherein said digital bus is an LEEE 1394

bus.

53. A method for connecting a number of information processing apparatuses together in a desired manner in which each information processing apparatus is connected to a digital bus, said method comprising the steps of: generating a signal representative of a graphical interface for display on a display unit which indicates the information processing apparatuses connected to said digital bus; receiving a desired connection signal indicative of a desired connection between corresponding information processing apparatuses and forming a control signal therefrom, in which the desired connection signal is obtained from an input provided by a user with the use of said graphical interface; and generating a signal for causing the desired connection between the corresponding information processing apparatuses to be established in accordance with said control signal.

54. A method according to claim 53, wherein said digital bus is an LEEE 1394

bus.