JP2000059399A - Device and method for transmitting, receiving and transmitting and receiving information and recording medium - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent information from being omitted in the middle of communication and to communicate the information at high speed while effectively utilizing ATM techniques. SOLUTION: A CPU 41 of a home router 4-4 executes a program stored in a memory 50 and controls the entire home router 4-1. An IEEE1394 interface 42 is connected to a DVCR 7-1 and DV camera 8-1. A video interface 43 receives an NTSC signal from the DVCR 7-1, synthesizes a GUI generated by the CPU 41 and outputs the result to the DVCR 7-1. An ATM interface 45 reserves a band to a first network or communicates IP data without reserving any band.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information transmitting apparatus and method, an information receiving apparatus and method, an information transmitting and receiving apparatus and method, and a recording medium. The present invention relates to an information transmitting apparatus and method for communicating information, an information receiving apparatus and method, an information transmitting and receiving apparatus and method, and a recording medium with reference to the mapping table.

[0002]

2. Description of the Related Art Recently, in the Internet, not only character information but also high-definition still images, moving images, and voices having a large amount of information have been transmitted. For example, voices and images are communicated in real time. Internet videophones have been realized.

[0003]

As described above, in addition to the increase in the amount of information transmitted on the Internet, the number of Internet users has increased rapidly. As a result, a communication line (Internet) Are crowded, the time required to access the server increases, or some information is lost during communication.

[0004] Since the Internet was devised about 20 years ago, the ATM (Asynch ATM) is a high-speed data communication system developed by recent technological evolution.
(ronous Transfer Mode) There was a problem that the technology could not be used effectively.

The present invention has been made in view of such a situation, and it is intended to prevent information from being lost during communication and to enable high-speed information communication utilizing ATM technology.

[0006]

An information transmitting apparatus according to claim 1, wherein a band reserving means for reserving a band of the second network, a generating means for generating a mapping table indicating an address of the information receiving apparatus, Transmitting means for transmitting information with reference to the mapping table generated by the generating means.

According to a fifth aspect of the present invention, there is provided the information transmitting method, wherein a bandwidth reservation step of reserving a bandwidth of the second network, a generating step of generating a mapping table indicating an address of the information receiving apparatus, and a mapping generated in the generating step. Transmitting the information with reference to the table.

According to a sixth aspect of the present invention, a program for a recording medium is generated by a bandwidth reservation step of reserving a bandwidth of the second network, a generation step of generating a mapping table indicating an address of the information receiving apparatus, and a generation step. Transmitting the information with reference to the mapping table.

An information receiving apparatus according to a seventh aspect of the present invention includes: a generating unit that generates a mapping table indicating an address of the information transmitting apparatus; and a transfer unit that transfers information by referring to the mapping table generated by the generating unit. It is characterized by the following.

[0010] The information receiving method according to claim 11 includes a generating step of generating a mapping table indicating an address of the information transmitting apparatus, and a transferring step of transferring information with reference to the mapping table generated in the generating step. It is characterized by the following.

According to a twelfth aspect of the present invention, a program for a recording medium includes: a generating step of generating a mapping table indicating an address of an information transmitting device; and a transfer step of transferring information with reference to the mapping table generated in the generating step. It is characterized by including.

According to a thirteenth aspect of the present invention, there is provided an information transmitting / receiving apparatus, comprising: a reservation step of reserving a band of a network; generating means for generating a mapping table indicating a communication destination address; and referring to the mapping table generated by the generating means. It is characterized by comprising communication means for communicating information, receiving means for receiving input of image information, and GUI generating means for generating a GUI, combining with the image information received by the receiving means, and outputting.

According to a fourteenth aspect of the present invention, in the information transmitting / receiving method, a reservation step of reserving a band of a network, a generation step of generating a mapping table indicating an address of a communication destination, and referring to the mapping table generated in the generation step. A communication step of communicating information, a receiving step of receiving input of image information, and a GUI for generating a GUI and combining with the image information received in the receiving step for output
And a generating step.

According to another aspect of the present invention, a program for a recording medium refers to a reservation step of reserving a band of a network, a generation step of generating a mapping table indicating a communication destination address, and refers to the mapping table generated in the generation step. A communication step of communicating information by inputting the image information, a receiving step of receiving input of image information, and a GUI generating step of generating a GUI, synthesizing the image with the image information received in the receiving step, and outputting the synthesized GUI.

[0015] The information receiving apparatus according to the sixteenth aspect is characterized in that:
Receiving a packet transmitted from an information transmitting device belonging to a first network operating based on the clock of
In an information receiving apparatus belonging to a second network that operates based on a second clock that is asynchronous with the first clock, a receiving unit that receives a transmitted packet; and a receiving unit that receives a packet received by the receiving unit. Detecting means for detecting a difference between the first clock in the first network and the second clock in the second network; and changing the time information included in the packet in accordance with the difference detected by the detecting means. It is characterized by comprising a changing means, and an output means for outputting a packet received by the receiving means in accordance with the time information changed by the changing means.

The information receiving method according to the twentieth aspect is characterized in that:
Receiving a packet transmitted from an information transmitting device belonging to a first network operating based on the clock of
In an information receiving method of an information receiving device belonging to a second network operating based on a second clock that is asynchronous with the first clock, a receiving step of receiving the transmitted packet and a receiving step of receiving the packet are performed. The first packet in the first network based on the
Detecting a difference between the clock of the second network and the second clock in the second network; changing the time information included in the packet in response to the difference detected by the processing of the detecting step; Outputting the packet received by the receiving step in response to the time information changed by the processing of the step.

According to a twenty-first aspect of the present invention, there is provided a program for recording on a recording medium which receives a packet transmitted from an information transmitting device belonging to a first network operating based on a first clock, the packet being asynchronous with the first clock. A program that executes processing of a second network that operates based on the clock of the second step, the method comprising: a receiving step of receiving a transmitted packet; and a first step of receiving a packet based on the packet received by the processing of the receiving step. The first in the network
Detecting a difference between the clock of the second network and the second clock in the second network; changing the time information included in the packet in response to the difference detected by the processing of the detecting step; Outputting the packet received by the receiving step in response to the time information changed by the processing of the step.

[0018] An information transmitting apparatus according to claim 1,
In the information transmission method described in the above, and the recording medium described in the claim 6, the bandwidth of the second network is reserved,
A mapping table indicating the address of the information receiving device is generated, and information is transmitted with reference to the generated mapping table.

An information receiving apparatus according to claim 7, wherein
In the information receiving method according to the first aspect and the recording medium according to the twelfth aspect, a mapping table indicating an address of the information transmitting apparatus is generated, and information is transferred with reference to the generated mapping table.

In the information transmitting / receiving apparatus according to the thirteenth aspect, the information transmitting / receiving method according to the fourteenth aspect, and the recording medium according to the fifteenth aspect, a mapping table which reserves a network band and indicates a communication destination address. Is generated, and information is communicated with reference to the generated mapping table. Also, input of image information is accepted,
A GUI is generated, combined with the received image information, and output.

[0021] In the information receiving apparatus according to the present invention, the information receiving method according to the twentieth aspect, and the recording medium according to the twenty-first aspect, a first clock in a first network is obtained from a received packet. A second clock shift in the second network is detected, and the time information included in the packet is changed in accordance with the detected shift. Then, the received packet is output according to the changed time information.

[0022]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a network system (hereinafter, referred to as a first network) having an upward compatibility with the conventional Internet proposed by the present applicant, for example, as Japanese Patent Application No. 9-279826. ) Will be described. This first network is a next-generation network architecture that solves the problems of the existing network architecture. Features of the first network include a high-speed resource reservation protocol technology and an application-compatible transfer protocol technology (rate control technology).

The high-speed resource reservation protocol technology is a technology that allows data to be transferred without interference by other communications by reserving a line band (communication resource) at a high speed before transferring the data. This technology makes effective use of the connection-based quality assurance network technology, which is a feature of Asynchronous Transfer Mode (ATM), and determines the route to the data transfer destination before sending the data. To the transfer destination. In the high-speed resource reservation protocol technology, a bandwidth is reserved for a necessary time, and when the data transfer is completed, the reservation is canceled.

The application-compatible transfer protocol technology (rate control technology) is a technology for effectively using the bandwidth secured by the high-speed resource reservation protocol technology without waste, so that data can reach the transfer destination smoothly. This is a technique in which a transfer rate (rate) is calculated in advance from the reserved (reserved) bandwidth before transmitting data, and the data is transmitted at a calculated constant rate.

The configuration of the first network will be described with reference to FIG. The edge routers 2-1 and 2-2 of the first network 1 concentrate the lines from the home router 4 of the terminal user (network of home, business, etc.),
Connect to backbone routers 3-1 to 3-3. Each of the backbone routers 3-1 to 3-3 is connected by an optical fiber, and transfers data using the high-speed resource reservation protocol technology and the application-compatible transfer protocol technology described above.

The home router 4 is connected to the first network 1
And an IEEE 1394 bus 5 (other end network composed of Ethernet). This network includes a DVCR (Digital Video Cassette Recorder) 7 equipped with an IEEE1394 interface, and a digital video recorder that converts video and audio information into DV data.
(DV) The camera 8 and the monitor 6 are connected.

FIG. 2 shows a configuration example when the videophone system to which the present invention is applied is realized by the system shown in FIG. In this specification, the term “system” refers to an entire device including a plurality of devices and units.

As the translator 10-1 constituting the home router 4-1 together with the controller 11-1, a general-purpose personal computer can be used. As shown in FIG. 3, the translator 10-1 is connected to an ether card 23.
The 10baseT cable 16-1 connects the controller 11-
1, and transmits and receives data to and from the first network via an optical fiber cable 15-1 connected to the ATM card 22 in response to a command from the controller 11-1. Translator 10-
1 is IP data from the first network (Internet Pr.
otocol) is converted to DV data, and is output to the DV terminal 25 of the DVCR 7-1 via a predetermined channel of the IEEE1394 bus 5-1-1 connected to the IEEE1394 card 21. Further, the translator 10-1 transmits the IEEE1394 data from the DV camera 8-1.
The DV data (image data and audio data) input via a predetermined channel of the IEEE1394 bus 5-1-2 connected to the card 21 is converted into IP data and transmitted to the first network. Further, the translator 10
-1 via the IEEE1394 bus 5-1-1, 5-1-2
The operation of the DVCR 7-1 and the DV camera 8-1 is controlled.

As the controller 11-1, a general-purpose personal computer can be used. As shown in FIG. 4, the controller 11-1 is provided with a monitor 6-1.
Generates a GUI (Graphical User Interface) to be displayed on the video card 33 as an NTSC signal.
The video signal is supplied to the input terminal A of the DVCR 7-1 via the video cable 17-1. Further, the controller 11-1 takes in the video data supplied from the output terminal B of the DVCR 7-1 into the GUI via the S video cable 18-1 connected to the capture card 32, and the S video cable 17-1. 1 through the input terminal A of the DVCR 7-1.
Is supplied as an NTSC signal.

Further, the controller 11-1 connects the DVCR 7- to the remote controller 12-1 connected to the serial port 31 via the dedicated serial cable 19-1.
Image data (DV data supplied from the translator 10-1 is output from the output terminal C of the
Data converted to NTSC signal or controller 11-
A command specifying the NTSC signal data supplied from 1) is transmitted by infrared rays.

When a command based on an infrared signal output from the remote controller 12-1 is received by the light receiving section 24 (FIG. 3) of the DVCR 7-1, the designated image data is transmitted together with the corresponding audio data to the DVCR 7-. 1 to the monitor 6-1 via the S video cable 20-1 or the stereo audio cable 21-1. Monitor 6
1 displays the input image data and reproduces the image data from a speaker (not shown) containing audio data.

The DVCR 7-1 can be controlled by transmitting a control command via the IEEE1394 bus 5 without using the remote controller 12-1. Further, the remote controller 12-1 may be integrated with the controller 11-1.

The home router 4-2 to the remote controller 12-2 shown on the right side of the first network in FIG.
Are the same systems as those of the home router 4-1 to the remote controller 12-1 shown on the left side of FIG. 2 described above, and the description thereof is omitted. I do.

The translator 10-1 and the controller 11-1 are connected to each other via an Ethernet (10 baseT cable 16).
Although the connection is made according to -1), the connection may be made using an optical fiber capable of IP connection or an IEEE1394 bus. The translator 10-1 and the controller 11
-1 corresponds to the home router 4 in FIG.
The translator 10-1 and the controller 11-1 may be realized using one computer.

FIG. 5 shows a home router 4-1 when the translator 10-1 and the controller 11-1 are integrated.
Is shown. The CPU 41 reads out a program stored in the memory 50 via the bus 51, and controls the entire home router 4-1 based on the program. The IEEE1394 interface 42 corresponds to the IEEE1394 card 21 in FIG.
DVCR 7-1 via EE1394 bus 5-1-1, 5-1-2
And the DV camera 8-1 are connected.

The video interface 43 corresponds to the video card 33 shown in FIG.
-1 is connected to the DVCR 7-1. The DVCR control interface 44 corresponds to the serial port 31 in FIG. 4, and is connected to the remote controller 12-1 via the dedicated serial cable 19-1. The ATM interface 45 corresponds to the ATM card 22 in FIG. 3 and communicates IP (Internet Protocol) data with or without reserving a band to the first network.
The user input interface 46 is connected with a mouse 47 and a keyboard (not shown). The pointing device connected to the user input interface 46 may be a mouse, a touch panel, a trackball, or a voice recognition device.

The hard disk interface 48 is connected to a hard disk 49 in which programs, program settings, and past input information are stored.

Next, the data communication processing of the home router 4-1 will be described with reference to FIG. DV camera 8-1
Are converted into DV data (DV packet), and the channel n (n is 0 representing a channel number) designated by the IEEE1394 interface 42 via the IEEE1394 bus 5-1-2. To 63
Number). The IEEE1394 interface 42
The DV packet of channel n is transferred to IEEE1394 isochronous
(isochronous) Received at input queue 68-n. IEEE139
4 The DV packet supplied to the isochronous input queue 68-n is transmitted via the bus 51 under the control of the CPU 41.
The data is transferred to the buffer 61 of the memory 50 and stored.

The DV packets (A in FIG. 7) stored in the buffer 61 are grouped by one or more predetermined numbers under the control of the CPU 41, as shown in FIG. A sequential number is added. Further, the packet to which the sequential number is assigned includes C in FIG.
As shown in (1), based on the transmission mapping table 62 stored in the memory 50, an IP header indicating the address of the connection destination (the other party) is added and converted into an IP packet.

As shown in FIG. 7D, the transmission mapping table 62 stored in the memory 50 stores the IEEE1394 bus 5 to which the DV data output from the DV camera 8-1 is transmitted. -1-2 (IEEE1394 bus 5-1
-2 is the same bus as the channel number (0
Home router 4 to be connected to)
-2 IP address (address0 to address63), connection destination D
IEEE1394 bus 5-2-1 (IEEE1) to which VCR 7-2 is connected
394 Bus number same as bus 5-2-2) (port number of home router 4-2) (port0 to p
ort63) is recorded.

IP packet in buffer 61 (FIG. 7c)
Are transferred to the network output queue 63 of the ATM interface 45 under the control of the CPU 41. The IP data transferred to the network output queue 63 is output using the bandwidth of the first network reserved by the ATM interface 45.

On the other hand, the IP packet transmitted from the called party via the first network is transmitted to the ATM interface 45.
Is stored in the network input queue 64. The IP packet stored in the network input queue 64 is
The data is transferred to the buffer 61 under the control of 1.

The IP packet (A in FIG. 8) transferred to the buffer 61 is checked by the CPU 41 for the presence or absence of a missing packet by referring to the sequential number. At this time, if there is any loss in the packet, the IP packet
Generated by the CPU 41.

Further, the CPU 41 reads the IP header of the packet transferred to the buffer 61 and, based on the IP header or the receiving mapping table 62 (D in FIG. 8) stored in the memory 50, reads the IP header. The channel number (port number of the home router 4-1) m of the IEEE1394 bus 5-1-1 to which the packet is output is determined (m is a channel number or a number from 0 to 63 representing a port number).

Further, the CPU 41 removes the IP header and the sequential number from the IP packet as shown in FIG. 8B, and divides the IP packet into DV packets as shown in FIG. 8C.

The divided DV packet is supplied to the IEEE1394 isochronous output queue 66-m of the IEEE1394 interface 42 (the DV terminal 25 of the DVCR 7-1) under the control of the CPU 41.
(Corresponding to the channel of the IEEE1394 bus 5-1-1) connected to the If the divided DV packet contains timing information, the timing information is supplied to the IEEE 1394 output timing control unit 65.

IEEE 1394 isochronous output queue 66-
Under the control of the CPU 41, the m DV packets are output to the channel m of the IEEE1394 bus 5-1-1 in synchronization with the timing transmitted by the IEEE1394 output timing control unit 65.

Next, from the home router 4-1, the IEEE1394
DVCR 7-1 or DV camera 8- via bus 5-1
The communication of the AV control command output to No. 1 will be described. For example, an AV that causes the DV camera 8-1 to output DV data
The control command is transmitted to the buffer 61 under the control of the CPU 41.
Is generated in The AV control command of the buffer 61 is
Asynchronous (asynchr) of the IEEE1394 interface 42
onous) It is transferred to the output queue 67. The AV control command of the asynchronous output queue 67 is output to the IEEE1394 bus 5-1 under the control of the CPU 41.

On the other hand, for example, in response to an AV control command,
The response output from the DV camera 7-1 is received by the IEEE1394 interface 42 and stored in the IEEE1394 asynchronous input queue 69. The response stored in the IEEE1394 asynchronous input queue 69 is transferred to the buffer 61 and then read out by the CPU 41 under the control of the CPU 41.

As described above, a control signal can be sent to the DVCR 7-1 via the IEEE1394 bus 5-1-1. However, the control signal is transmitted from the remote controller 12-1 by infrared rays. You can also send it.

FIG. 9 shows a GU generated by the CPU 41 executing the videophone application program stored in the hard disk 49 and displayed on the monitor 6-1.
An example of I is shown. As described above, this GUI includes the DV camera 8-2 by the controller 11-1 (CPU 41).
The video of the other party is captured by the video interface 43, is input from the video interface 43 to the DVCR 7-1 via the S video cable 17-1, and is further output from the output terminal C of the DVCR 7-1 to the monitor 6. -1.

The display section 71 displays an image of the other party taken by the DV camera 8-2. The display unit 72 displays, for example, a call time (Connected Time) and
ing for Connection).

A plurality of buttons located on the right side of the display sections 71 and 72 are operated by the mouse 47. When the operation is input to the CPU 41 via the user input interface 46, the CPU 41 executes a process corresponding to the button. For example, the call (CALL) button 73 is operated when a connection request is transmitted to a predetermined party who wants to talk. At this time, as shown in FIG.
In 4, the light emitting unit moves from the left side to the right side and is displayed.

When there is a call from the other party, the light-emitting section moves from the right side to the left side and is displayed on the incoming call waiting indicator 76 indicating the reception of the connection request, as shown in FIG. 10B. .

In order to respond to the light emission display (calling) of the incoming call waiting indicator 76, a response (catch) button 75
Is operated.

The call end (Hang up) button 77 is operated when disconnecting the connection. Display (Monitor on) button 78
Turns on the video display of the call partner on the display 71 (FIG. 11).
(B)) is operated when switching from off (FIG. 11A) or from off to on.

The display switching (Full Screen) button 79 is used to display the image of the other party displayed on the display unit 71 as shown in FIG. 12A, as shown in FIG.
This operation is performed when the entire screen is enlarged and displayed.
That is, when the user input interface 46 detects that the display switching button 79 has been operated, the CPU 41
Remote controller 1 from VCR control interface 44 via dedicated serial cable 19-1
2-1 and outputs the output of DVCR 7-1 to the controller 1
From the NTSC signal data (GUI) supplied from 1-1,
A command to switch to the DV data supplied from the translator 10-1 is transmitted. When the mouse 47 is clicked in the state shown in FIG.
The display on the monitor 6-1 returns to the GUI shown in FIG. That is, the operation of the mouse 47 is detected, and a command for switching the output of the DVCR 7-1 is transmitted from the remote controller 12-1.

The CPU 41 superimposes and displays a setting input window as shown in FIG. 13 on the monitor 6-1 in response to the operation of the setting (Option) button 80. In the transfer address input section 91 of the setting input window, the address of the home router 4-2 to be connected is set using an IP address, for example, “192.168.1.1”.
In the home router address input unit 92, the address of the Ethernet card 23 connecting the translator 10-1 and the controller 11-1 is set using an IP address, for example, “192.168.1.2”. In the AMInet address, the address (address of the first network) of the ATM card 22 (or the ATM interface 45) of the translator 10-1 is set using an IP address, for example, “192.168.2.1”. You.

The size of the packet to be transmitted is set in the packet size input section 94. In the reception delay input unit 95, the size of the buffer of the reception data is set using the number of frames. If this setting is increased, the display screen will not be interrupted in the middle, but the delay time after receiving the data until the data is displayed will increase, and if the setting is reduced, the delay time will decrease, but the display time will be reduced. Images may be interrupted.

When the check box 96 is checked, transmission of video information and audio information is set, and when unchecked, transmission of only audio information is set. When the check box 97 is checked, reception of video information and audio information is set, and when unchecked, reception of only audio information is set. Normally, the check boxes 96 and 97 are set (checked) to transmit and receive video information and audio information.

The initialization of the remote controller 12-1 is set according to the operation of the remote controller initialization button 98. In the check box 99, whether or not the remote controller 12-1 is used is set.

When the OK button 100 is operated,
The past settings are updated using the parameters input to the setting input window, and the setting input window is closed. On the other hand, when the cancel button 101 is operated, the parameters input in the setting input window are invalidated, the past settings are not updated, and the setting input window is closed.

Returning to the description of FIG. The reset (Reset) button 81 is operated when the image of the other party displayed on the display unit 71 is disturbed. In response to the operation of the reset button 81, the reception during the processing is stopped, and the reception processing of the video information is performed again. The end (End) button 82 is operated when ending the videophone application.

The GUI processing of the videophone application will be described with reference to the flowcharts of FIGS. In step S1, the CPU 41 determines whether or not the call button 73 has been pressed by the mouse 47. When determining that the call button 73 has been pressed, the CPU 41 proceeds to step S2 (FIG. 15). Step S
In 2, the CPU 41 outputs a connection request to the first network via the ATM interface 45 based on the information preset in the setting input window.

In step S3, the CPU 41 sends a response to the connection request from the connection destination (the other party who wants to talk).
It is determined whether or not the ATM interface 45 has received the data via the first network. In step S3, the CP
If the U41 determines that the ATM interface 45 has not received a response to the connection request, the process proceeds to step S4.
In step S4, the CPU 41 determines whether a predetermined time has elapsed since the transmission of the connection request. CPU4
If it is determined that the predetermined time has not elapsed, the process returns to step S3 and waits for a response to the connection request. In step S4, if the CPU 41 determines that the predetermined time has elapsed, the process returns to step S1.

If the CPU 41 determines in step 3 that a response has been received, the process proceeds to step S5. In step S5, the CPU 41 causes the memory 50 to store the AMInet IP address and port number of the connection destination included in the received response. In step S6, the CPU 41 causes the ATM interface 45 to reserve the band of the first network. In step S7, the CPU 41 determines whether or not the bandwidth reservation of the first network is successful, and proceeds to step S8 when it determines that the bandwidth reservation is successful.

In step S8, the CPU 41 sets the past transmission setting with the connection destination (mapping table 62 (FIG. 7).
(D)) exists in the memory 50. CPU
If it is determined that the past transmission setting with the connection destination does not exist in the memory 50, the process proceeds to step S9. In step S9, the CPU 41 determines whether the I-
A mapping table 62 (D in FIG. 7) is created by associating the channel number of EEE1394, the AMInet IP address of the connection destination, and the port number, and stored in the memory 50. In step S8, when it is determined that there is a past transmission setting with the connection destination, the processing of step S9 is skipped because the transmission setting is used.

In step S10, the CPU 41
An AV control command for instructing the DV camera 8-1 to capture an image is transmitted via the E1394 interface 42, and the designated IEEE
DV data (image data and audio data) is output to the 1394 channel. The DV data is converted into IP data by the ATM interface 45 and output to the first network.

In step S11, the CPU 41 determines whether or not the past reception setting (mapping table 62 (D in FIG. 8)) with the connection destination exists in the memory 50.
If it is determined that there is no previous reception setting with the connection destination, the process proceeds to step S12. In step S12,
The CPU 41 connects the IP address of the home router 4-2 of the connection destination and the IEEE1394 bus 5 to which the own DVCR 7-1 is connected.
A reception mapping table 62 (D in FIG. 8) is created in association with one channel and stored in the memory 50. If it is determined in step S11 that there is a previous reception setting with the connection destination, the reception setting is used, and the processing in step S12 is skipped.

In step S13, the CPU 41 starts a receiving process. Details of the receiving process will be described with reference to the flowchart in FIG. In step S51, the ATM interface 45 receives an IP packet from the first network under the control of the CPU 41, records the IP packet in the network input queue 64, and then transfers the packet to the buffer 61. The CPU 41 reads the reception setting (mapping table 62 (D in FIG. 8)) stored in the memory 50 and determines the output channel m of the IP packet.

In step S52, the CPU 41 separates the IP packet in the buffer 61 into a DV packet, and
The data is transferred to the IEEE1394 isochronous output queue 66-m of the 1394 interface 42.

In step S53, the CPU 41 determines whether the DV packet separated in step S52 contains timing information. When it is determined that the timing information is not included, the process returns to step S52 to continue the separation and transfer of the DV data. When it is determined that the timing information is included, the timing information is transmitted to the isochronous output timing control unit 65. Supply.

In step S54, the IEEE1394 interface 42 waits until the isochronous output timing control unit 65 instructs the start of output, and when the start of output is instructed, the process proceeds to step S55.

In step S 55, the IEEE1394 interface 42 synchronizes the DV data in the IEEE1394 isochronous output queue 66 with the timing specified by the isochronous output timing control unit 65 and transmits the DV data to the IEEE1394 bus 5.
Output to 1.

The DV data (image data and audio data) is input to the DVCR 7-1 via the IEEE1394 bus 5-1. The audio data is supplied to the monitor 6-1 as it is and reproduced, and the image data is reproduced. As shown in FIG. 11 (B), the DVCR 7-1 is incorporated in the GUI, supplied to the monitor 6-1 and displayed.

In step S14 (FIG. 16), the CPU
41 determines whether or not the call end button 77 has been pressed. If it is determined that the call end button 77 has not been pressed, the process proceeds to step S15. In step S15, the CPU 41 determines whether or not the ATM interface 45 has received a call termination notification from the other party. If it is determined that the notification of the call end is not received, step S
Proceed to 16.

In step S16, the CPU 41 determines whether the display button 78 has been pressed. If it is determined that the display button 78 has been pressed, step S17
Proceed to. In step S17, the CPU 41 causes the display unit 71 to delete the video of the other party if it is displayed, and displays the video of the other party if it is not displayed. Thereafter, the process returns to step S14.

In step S16, the display button 78
If it is determined that is not pressed, step S18
Proceed to. In step S18, the CPU 41 determines whether the display switching button 79 has been pressed. If it is determined that the display switching button 79 has been pressed, the process proceeds to step S
At 19, the CPU 41 sends the command to the remote controller 12-1 via the DVCR control interface 44.
Then, a command to switch the output of the DVCR 7-1 to the DV data supplied from the translator 10-1 is transmitted. Therefore, the DV data is displayed on the monitor 6-1 in full screen as shown in FIG.

In step S20, the CPU 41 waits for processing until the mouse 47 is clicked, and when it is determined that the mouse 47 has been clicked, the CPU 41 transmits the remote controller 12 via the DVCR control interface 44 in step S21. -1 to DV
A command to switch the output of the CR 7-1 to the GUI supplied from the controller 10-1 is transmitted. Therefore, as shown in FIG.
Is displayed. Thereafter, the process returns to step S14.

If it is determined in step S18 that the display switching button 79 has not been pressed, the process proceeds to step S18.
Proceed to 22. In step S22, the CPU 41 determines whether the reset button 81 has been pressed. If it is determined that the reset button 81 has been pressed, the process proceeds to step S23. In step S23, the CPU 41
Controls the ATM interface 45 to stop reception from the first network, and re-executes the above-described reception processing (the same reception processing as in step S13) in step S24.

If it is determined in step S22 that the reset button 81 has not been pressed, the process proceeds to step S22.
Return to 14.

In step S14, when it is determined that the call end button 77 has been pressed, in step S15, it is determined that an end notification has been transmitted from the other party, and in step S7, the first network If it is determined that the band reservation has not been successful, the process proceeds to step S25. In step S25,
The CPU 41 notifies the connection destination of the connection end. Step S
At 26, the CPU 41 controls the ATM interface 45 to stop transmitting IP packets to the first network, and transmits an AV control command to the DV camera 8-1 via the IEEE1394 interface 42, Stop output of DV data.

In step S27, the CPU 41 determines whether the DV
The record of the transmission mapping table 62 (D in FIG. 7) that associates the IEEE 1394 channel number, the AMInet IP address of the connection destination, and the port number used by the camera 8-1 is deleted from the memory 50.

In step S28, the CPU 41 sets the ATM
It controls the interface 45 to cancel the bandwidth reservation of the first network.

At the step S29, the CPU 41 sets the ATM
The interface 45 is controlled to stop reception from the first network.

In step S30, the CPU 41 determines the IP address of the home router 4-2 to which the
The record of the receiving mapping table 62 (D in FIG. 8) that associates the channel m of the IEEE1394 bus to which 7-1 is connected is deleted from the memory 50. Thereafter, the process returns to step S1.

The description returns to FIG. If it is determined in step S1 that the call button 73 has not been pressed, the process proceeds to step S31. In step S31,
The CPU 41 determines whether the setting button 80 has been pressed. If it is determined that the setting button 80 has been pressed,
Proceed to step S32. In step S32, the CPU
Reference numeral 41 denotes a setting input window shown in FIG.
-1 is displayed. Here, the user inputs various settings. Then, the process returns to step S1.

At step S31, the setting button 80
If it is determined that is not pressed, step S33
Proceed to. In step S33, the CPU 41 determines whether there is an incoming call from another user (ATM interface 4).
5 has received the connection request). If it is determined that there is no incoming call, the process proceeds to step S34. In step S34, the CPU 41 determines whether the end button 82 has been pressed. If it is determined that the end button 82 has not been pressed, the process returns to step S1. If it is determined that the end button 82 has been pressed, the CPU 41
Ends the GUI processing (videophone application).

If it is determined in step S33 that there is an incoming call, the process proceeds to step S35. Step S35
In, the CPU 41 determines whether or not the response button 75 has been pressed. If it is determined that the response button 75 has not been pressed, the process proceeds to step S36. In step S36, the CPU 41 determines whether or not a predetermined time has started from the start of the incoming call, and if the predetermined time has not elapsed,
The process returns to step S35 and waits until the response button 75 is pressed. If it is determined in step S36 that the predetermined time has elapsed, the process returns to step S1.

In step S35, the response button 75
If it is determined that has been pressed, the process proceeds to step S37. In step S37, the CPU 41 stores the IP address of the connection destination included in the incoming call (connection request) in the memory 50. Further, the CPU 41 uses the channel number n of the IEEE1394 bus 5-1 to which the DV camera 8-1 is connected and the address of the home router 4-1 as a response to the incoming call,
Output via ATM interface 45. Thereafter, the process proceeds to step S6, and the subsequent processes are executed.

As described above, according to the present embodiment, a so-called videophone can be realized by communicating the DV data (video and audio) captured by the DV camera 8 in real time. Further, according to the present embodiment, the DVCR 7 can communicate the DV data reproduced from the magnetic tape.

In the data transfer in the isochronous mode defined by the IEEE1394 bus 5, the transmission timing of each data packet is allowed to have an error of only about several hundred microseconds. This is a severe condition for software running on the non-real-time OS of the CPU 41.

Further, image data captured by the DV camera 8-1 operating on the IEEE1394 bus 5-1-2 is transferred via the first network 1 to the DVCR 7-2 operating on the IEEE1394 bus 5-2-1. (IEEE1394 bus 5-2-2)
The same applies to the case where an image captured by the DV camera 8-2 operating on the above is transferred to the DVCR 7-1 operating on the IEEE1394 bus 5-1-1 via the first network 1), and the IEEE1394 bus 5-1. 2 and the IEEE 1394 bus 5-2-1 have different clocks (or the EEE 1394 bus 5-2-2 and the IEEE 1394 bus 5-1).
A clock shift of −1 is accumulated, and the buffer 61 may overflow or underflow. Therefore, a method for preventing such overflow or underflow will be described below.

First, the principle will be described. Now, for example, the image captured by the DV camera 8-2 is converted to a DVCR7.
-1. The application that controls the transfer on the OS of the CPU 41 outputs an isochronous packet written to the buffer 61 from the network input queue 64 by outputting a system call of the function write () to the device driver of the isochronous output queue 66. The process of writing the data of the DV camera 8-2 including the header into the isochronous output queue 66 is executed. After several hundred packets of data have been written to the isochronous output queue 66, the application explicitly instructs the device driver of the isochronous output queue 66 to start sending packets. When instructing the start of transmission, it is possible to specify a bus cycle to be started. When the transmission from the isochronous output queue 66 is started, the data is continuously transmitted, so that the application needs to continuously execute the writing.

In order to reduce the load on the CPU 41, the device driver stores several hundreds or thousands of packets of data in the buffer 61, chains the DMA, and generates several hundreds of packets by one interrupt. Transmission of data for a packet is performed. For this reason, even an OS without real-time capability can transmit packets every 8,000 isochronous cycles per second (125 microsecond cycle).

Data is sent out onto the IEEE1394 bus 5-1-1 one packet at a time for each isochronous cycle. If a packet is not transmitted due to a DMA transfer failure or other causes, the device driver discards the data in the buffer 61 to make the number of cycles correspond to the number of transmitted packets. This processing is performed by an interrupt after the completion of the DMA transfer, so that the correspondence between the cycle and the packet temporarily shifts. However, since the data is discarded from the buffer 61, after a predetermined time (two times from the DMA) After the interruption of the degree), the deviation is eliminated. The time until the deviation is eliminated is determined by the number of delays of the DMA regardless of the buffer size of the device driver, and thus can be set to a relatively short time.

As described above, by designating the transmission start bus cycle and guaranteeing the correspondence between the cycle and the data, the application can actually write the data to be written in the IEEE.
It is possible to accurately know the timing of transmission to the 1394 bus 5-1-1. This makes it possible to control the timing of the isochronous packet from an application process with low real-time property, in combination with the fact that the ice synchronous output queue 66 as a memory for transferring the ice synchronous packet is configured as a FIFO.

Next, referring to the flowchart of FIG.
The details of the isochronous packet transfer process performed by the application running on the CPU 41 will be described.
In step S71, the CPU 41 (application) extracts a packet from the network input queue 64. In step S72, the CPU 41 determines whether or not the packet extracted in step S71 includes a time stamp. The packet having the time stamp is configured as shown in FIG. FIG.
Represents a time stamp. A packet having no time stamp is configured as shown in FIG. 20, and the values of the time stamp field (SYT field) are all “1”. & In the packet structure of FIGS. 19 and 20, Data length represents the length of the packet, and Tag represents a label related to the format of the isochronous packet. channel
Is the channel number (0 to 6) on the IEEE1394 bus 5.
3). Tcode indicates the type of packet and the type of transaction. In the case of isochronous data, Tcode is set to a value of “10”.

Sy is a synchronization code (Synchronization Code) for application-specific control.
e). Header CRC (Cyclic Redundancy Che
ck) represents a header error detection code. That is, CRC of Data length, Tag, Channel, Tcode, Sy is described here. The SID indicates a source node ID, that is, a node number of a packet transfer source. DBS stands for Data block si
Represents ze (data block size).

FN indicates a function number. QPC (Quadlet paddingcount) represents the number of padding. SPH (source packet header) indicates whether or not the data includes a source packet header. DBC (Data block count) represents a sequential number of a data block. FMT indicates a format number, and is set to “0” in the case of digital video. FDF (for
mat dependent data) indicates information specific to the format.

According to IEC61883-1, the time stamp of the CIP header and the bus cycle need to correspond,
The deviation is allowed only for a few cycles (empirically, only 0 to 1 cycle is allowed). In the following, the value of the time stamp of the CIP header is also referred to as the timing of the packet as necessary. In DVC, some packets do not have a time stamp in the CIP header, but the timing of these packets is
It is determined by simple linear interpolation from the timing of the packet having the time stamp.

If it is determined in step S72 that the time stamp is included in the packet, the process proceeds to step S73, and the value of the variable n representing the number of packets is incremented by one. This variable n is reset to “0” at the timing when the data rate is reviewed in step S80 described later.

Next, in step S74, the CPU 41 adds the data amount in the isochronous output queue 66 to the variable S representing the accumulated value of the data amount held in the isochronous output queue 66. In step S75, the CPU
41 corrects the time stamp by multiplying the time stamp of the packet by the rate R.

If it is determined in step S72 that the time stamp is not included in the packet, the processing in steps S73 to S75 is skipped, and the processing proceeds to step S76.

In step S76, the CPU 41 places the packet in the output queue 66, and adds the data amount to a variable N representing the accumulated value of the transmission data amount. Step S
In 77, the CPU 41 determines whether or not the value of the variable n incremented in step S73 has reached a predetermined value (for example, 100). That is,
It is determined whether it is time to review the rate R. If the value of n has not reached 100, the process returns to step S71, and the subsequent processing is repeatedly executed.

In step S77, the value of n is 100
When it is determined that the time has reached (when it is determined that it is time to review the rate R), the process proceeds to step S78, where the CPU 41 transmits the average value A (= S / n) of the data amount of the isochronous output queue 66, and transmits A new rate R is calculated from the accumulated value N of the data amount and the current rate R. Further, in step S79, the CPU 41 stores the average value A for the next calculation, and clears the value S representing the data amount of the isochronous output queue 66 and the accumulated value N of the transmission data amount. That is, the value of S and the value of N are set to “0”. Then, in step S80,
The CPU 41 resets the value of the variable n to “0”, and thereafter,
The process returns to step S71, and the subsequent processes are repeatedly executed.

The processing of putting the packet in step S76 into the isochronous output queue 66 and adding the data amount to the transmission data amount will be further described with reference to the flowchart in FIG. In step S91, the CPU 41 determines whether or not the packet includes a time stamp. If not, the CPU 41 calculates a time stamp (timing) by linear interpolation in step S92. If it is determined in step S91 that the packet includes a time stamp (timing), and if the time stamp (timing) is calculated by linear interpolation in step S92, the CPU 41 determines in step S93 that the time stamp (timing) is It is determined whether or not (timing) is greater than the sum (VCt + D) of the value VCt of the cycle counter representing the bus cycle and a predetermined constant D determined from the delay due to transfer or the like.

That is, it is determined here whether or not it is time to output the packet currently targeted. If the time stamp (timing) of the packet is equal to or smaller than the sum of the counter value VCt and the constant D, it is not the timing to output the packet, so the process proceeds to step S94, and the CPU 41 determines An empty packet is put in the output queue 66, and the value of the counter is
A value C representing the length of one cycle is added to VCt. Thereafter, the process returns to step S93, and the value of the time stamp and the magnitude of the added value of the counter value VCt and the constant D are compared again.

FIG. 22 shows the format of an empty packet inserted into the isochronous output queue 66 in step S94. As shown in the figure, in this case, the data are all set to 1.

As described above, since the correspondence between the number of times of writing and the bus cycle for outputting data is guaranteed, the CPU 41 increases the value of the counter value VCt every time the function write () is executed. Then, the cycle in which the data to be written by the next execution of the function write () is actually output to the bus can be easily known. The transmission timing is determined by comparing the timing of each packet with the virtual cycle.

In an actual program, in order to determine the timing of each packet by linear interpolation, a packet without a time stamp is buffered without executing the function write (), and the packet with the time stamp is read. Then, the function write () can be executed after the timing of the buffered packet is obtained. The time stamp of the CIP header is 1 / (12 ×
256) Since the cycle is the minimum unit, the value VCt of the counter and the value of the length C of one cycle are also calculated using this as a unit.

If it is determined in step S93 that the value of the time stamp (timing) has become larger than the value obtained by adding the constant D to the value VCt of the counter, the process proceeds to step S95, and the CPU 41 places the packet in the isochronous output queue 66. Then, the value C representing the length of one cycle is added to the value VCt of the counter, and the transmission data amount at that time is added to the accumulated value N of the transmission data amount. Next, proceeding to step S96, the CPU 41 determines whether or not transmission has been started. If not, the process proceeds to step S97, where it is determined whether or not sufficient packets are held in the isochronous output queue 66. judge. If enough packets have already been held in the isochronous output queue 66, the CPU 41 determines in step S98.
Starts transmission. Isochronous output queue 6
6 still does not hold enough packets,
The transmission start process in step S98 is skipped.

As described above, the CPU 41 indirectly determines the difference between the clock of the IEEE1394 bus 5-2-2 and the clock of the IEEE1394 bus 5-1-1 from the amount of data held in the isochronous output queue 66. presume. The device driver has a function ioctl () that returns the amount of data in the driver in byte units. This function ioctl () can obtain an accurate value in consideration of the amount of data in the software buffer and the state of DMA execution from the state of the DMA register.

The application repeatedly checks the data amount a plurality of times at appropriate intervals and averages the results. By comparing the average value with the previous value and examining the increase / decrease, it is possible to know the difference between the clocks of the source bus and the destination bus. If you increase the number of samplings to some extent,
Good results can be obtained even if the sampling intervals vary. Theoretically, the sampling interval may be random.

If the amount of data written by the system call of the function write () is stored, a clock shift can be calculated. For example, in the case where the previous average value is 500 KB and the current average value is 501 KB, if the data written during that time is 1000 MB, the clock shift is calculated as follows.

(501KB-500KB) / 1000MB =
0.000001 That is, in this case, the transmission source IEEE 1394 bus 5
-2-2 clock is 1ppm (parts per million)
To the extent, the interval is short.

In order to prevent the data amount of the isochronous output queue 66 from increasing or decreasing due to such a shift of the bus clock, a rate R is defined. The value of this rate R is
For example, it is a value close to almost 1, such as 1.00001.

The captured packet P (i) (i = 0, 1,
The timing Pt (i) of (2,... N) is modified by the rate R as shown by the following equation, and is set to Pt ′ (i).

Pt ′ (i) = Ct0 + (Pt (i) −Ct0) × R = Ct0 + (Pt (i) −Ct0) × Rc / Rm = Pt ′ (i−1) + (Pt (i) −Pt (i-1)) × Rc / Rm In the above equation, R = Rc / Rm, R is represented by two integers Rc and Rm, and Rm is fixed at 1,000,000, and the value of Rc is changed. The rate R is specified. Also, if the transmission is continued for a long time, the value of Pt (i) −Ct0 becomes very large, so in the above equation, Pt ′ (i−1) is used instead of Ct (0). I have.

The data in the isochronous output queue 66 is transmitted faster when the value of R is reduced, and is transmitted later when the value of R is increased. By selecting an appropriate value for the rate R, a clock deviation between buses can be absorbed, and the amount of data in the buffer can be kept constant.

In order to further reduce the error, the remainder Rest (i) at the time of integer division can be stored and used for the next calculation. In this case, the timing Pt '(i) corrected by the rate R is expressed by an equation.

Pt ′ (i) = Pt ′ (i−1) + ((Pt (i) −Pt (i−1)) × Rc
+ Rest (i-1)) / Rm where Rest (i) is expressed by the following equation.

Rest (i) = ((Pt (i) -Pt (i-1)) × Rc + Res (i
-1))-((Pt (i) -Pt (i-1)) × Rc + Rest (i-1)) / Rm × Rm The above equation is ((Pt (i) -Pt (i-1)) ) × Rc + Rest (i−1)) = B, then Rest (i) = B− (B / Rm) × Rm. The value of (B / Rm) × Rm is B algebraically,
When an integer operation is performed, a value different from B is obtained due to a rounding error in division. This is Rest (i).

After calculating the average value A of the data amount in the ice-chronous output queue 66, outputting the data for a predetermined period, and calculating the average value A 'of the data amount in the ice-chronous output queue 66 again, Meanwhile the function write ()
Assuming that the total of the data processed in step (1) is N and the transmission rate is R, the rate R ′ for eliminating the clock deviation is obtained as follows.

R ′ = (N / (N + A′−A)) × R This equation is derived intuitively and is not proved, but it is empirically found to be sufficiently effective. It turns out that there is.

If the amount of data in the isochronous output queue 66 is to be kept at a predetermined value A0, a rate R "obtained by further modifying the rate R 'can be used as follows, where F is 1 /. 1000 to 1/1000
It is a constant of about 00.

R ″ = R ′ − (A′−A0) / A0 × F Normally, transmission of an isochronous packet is performed by a dedicated link chip, and the format itself is suitable for mounting on AV equipment or the like. However, if a control method like the present invention is used, the stream can be controlled by general-purpose hardware and an OS.

In the future, 1394 will be added to personal computers.
It is thought that a host adapter using a common standard IEEE1394 link chip called OHCI (1394 Open Host Controller Interface) will be installed as standard,
Since the OHCI specification is based on PELE, the control method as in the present invention is effective.

Although the DVC format has been mainly described above, the present invention can be applied to other formats since most parts do not depend on the format.

[0130]

As described above, according to the information transmitting apparatus according to the first aspect, the information transmitting method according to the fifth aspect, and the recording medium according to the sixth aspect, the reserved second network is provided. Since the information is transmitted by referring to the mapping table in the band, the information is prevented from being lost during transmission, and high-speed information transmission utilizing the ATM technology can be performed.

Further, according to the information receiving apparatus described in claim 7, the information receiving method described in claim 11, and the recording medium described in claim 12, the information is transferred with reference to the mapping table. Therefore, it is possible to prevent information from being lost during reception.

According to the information transmitting / receiving device of the thirteenth aspect, the information transmitting / receiving method of the fourteenth aspect, and the recording medium of the fifteenth aspect, the bandwidth of the reserved network is referred to by referring to the mapping table. Since the information is communicated, it is possible to prevent the information from being lost in the middle of the communication, and to perform high-speed information communication utilizing the ATM technology.

According to the information receiving apparatus described in claim 16, the information receiving method described in claim 20, and the recording medium described in claim 21, it is possible to cope with a deviation between the first clock and the second clock. Since the time information included in the packet is changed, data can be received in real time between different networks using asynchronous clocks.

[Brief description of the drawings]

FIG. 1 is a diagram showing a configuration of a first network.

FIG. 2 is a block diagram showing a configuration of a videophone system to which the present invention is applied.

FIG. 3 is a block diagram showing a connection between the translator 10-1 of FIG. 2 and another device.

FIG. 4 is a block diagram showing a connection between the controller 11-1 of FIG. 2 and another device.

FIG. 5 is a block diagram showing a configuration of a home router 4-1 in which the translator 10-1 and the controller 11-1 of FIG. 2 are integrated.

FIG. 6 is a diagram illustrating data communication of a home router 4-1 in FIG.

FIG. 7 is a diagram illustrating data communication of a home router 4-1 in FIG.

8 is a diagram illustrating data communication of home router 4-1 in FIG.

FIG. 9 is a diagram illustrating a GUI displayed on a monitor 6-1 in FIG.

FIG. 10 is a diagram illustrating a GUI displayed on a monitor 6-1 in FIG.

11 is a diagram illustrating a GUI displayed on a monitor 6-1 in FIG.

FIG. 12 is a diagram illustrating a GUI displayed on a monitor 6-1 in FIG.

FIG. 13 is a diagram showing a setting input window.

FIG. 14 is a flowchart illustrating GUI processing of the videophone system in FIG. 2;

FIG. 15 is a flowchart illustrating GUI processing of the videophone system in FIG. 2;

FIG. 16 is a flowchart illustrating GUI processing of the videophone system in FIG. 2;

FIG. 17 is a flowchart illustrating a reception process in step S13 of FIG.

FIG. 18 is a flowchart illustrating an operation of correcting a rate.

FIG. 19 is a diagram illustrating a format of a packet having a time stamp.

FIG. 20 is a diagram illustrating the format of a packet without a time stamp.

FIG. 21 is a flowchart illustrating a more detailed process of step S76 in FIG. 18;

FIG. 22 is a diagram illustrating a format of an empty packet.

[Description of Signs] 1 First network, 2 Edge router, 3
Backbone router, 4 home router, 5 IEEE13
94 buses, 6 monitors, 7 DVCR, 8 DV camera,
10 translator, 11 controller, 12
Remote controller, 41 CPU, 42 IEEE1
394 interface, 43 video interface,
44 DVCR controller interface, 45 AT
M interface, 46 user input interface, 47 mouse, 48 hard disk interface, 49 hard disk, 50 memory, 51
Bus, 61 buffer, 62 mapping table

Claims (21)

[Claims] 1. An information transmitting apparatus belonging to a first network and transmitting information to an information receiving apparatus belonging to a third network via a second network, wherein a bandwidth for reserving a bandwidth of the second network is provided. An information transmitting apparatus comprising: a reservation unit; a generating unit that generates a mapping table indicating an address of the information receiving device; and a transmitting unit that transmits information by referring to the mapping table generated by the generating unit. . 2. The method according to claim 1, wherein the generating unit generates a mapping table in which a channel number of the first network, an address of the second network, and a channel number of the third network are associated. The information transmitting device according to claim 1. 3. The method according to claim 1, wherein the first and third networks are IEEE
3. The information transmitting apparatus according to claim 2, wherein the information transmitting apparatus is a 1394 serial data bus network. 4. The apparatus according to claim 1, further comprising: a receiving unit that receives an input of image information; and a GUI generating unit that generates a GUI, and combines the image information with the image information received by the receiving unit and outputs the combined GUI. An information transmitting device according to claim 1. 5. An information transmission method of an information transmission device belonging to a first network and transmitting information to an information reception device belonging to a third network via the second network, wherein the bandwidth of the second network is A bandwidth reservation step of reserving the information, a generation step of generating a mapping table indicating the address of the information receiving apparatus, and a transmission step of transmitting information by referring to the mapping table generated in the generation step. How to send information. 6. A program for performing a process of transmitting information to an information receiving device belonging to a third network via a second network, the program belonging to a first network, wherein the bandwidth of the second network is A bandwidth reservation step of reserving; a generation step of generating a mapping table indicating an address of the information receiving apparatus; and a transmission step of transmitting information by referring to the mapping table generated in the generation step. A recording medium on which a computer-executable program is recorded. 7. An information receiving apparatus belonging to a first network and receiving information transmitted from an information transmitting apparatus belonging to a third network via a second network, the information receiving apparatus indicating an address of the information transmitting apparatus. An information receiving apparatus comprising: a generation unit that generates a mapping table; and a transfer unit that transfers information by referring to the mapping table generated by the generation unit. 8. The method according to claim 1, wherein the generating unit generates a mapping table corresponding to a channel number of the first network, an address of the second network, and a port number of the third network. The information receiving device according to claim 7. 9. The method according to claim 1, wherein the first and third networks are IEEE
9. The information receiving apparatus according to claim 8, wherein the information receiving apparatus is a 1394 serial data bus network. 10. The image processing apparatus according to claim 7, further comprising: a receiving unit that receives an input of image information; and a GUI generating unit that generates a GUI, and combines and outputs the GUI with the image information received by the receiving unit. An information receiving device according to claim 1. 11. An information receiving method for an information receiving apparatus belonging to a first network and receiving, via a second network, information transmitted from an information transmitting apparatus belonging to a third network, wherein the information transmitting apparatus An information receiving method, comprising: a generating step of generating a mapping table indicating the address of the information; and a transfer step of transferring information with reference to the mapping table generated in the generating step. 12. A program for performing a process of receiving information transmitted from an information transmitting device belonging to a third network via a second network, the program belonging to a first network, the program comprising: Recording a computer-executable program, comprising: a generation step of generating a mapping table indicating an address; and a transfer step of transferring information with reference to the mapping table generated in the generation step. Medium. 13. An information transmitting and receiving apparatus for transmitting or receiving information via a plurality of networks, wherein: a reservation unit for reserving a bandwidth of the network; a generating unit for generating a mapping table indicating an address of a communication destination; A communication unit that communicates information with reference to a mapping table generated by the generation unit; a reception unit that receives input of image information; a GUI that generates a GUI and combines and outputs the image information with the image information received by the reception unit An information transmitting and receiving apparatus comprising: a generating unit. 14. An information transmitting and receiving method for an information transmitting and receiving apparatus for transmitting or receiving information via a plurality of networks, comprising: a reservation step of reserving a bandwidth of the network; A communication step of communicating information with reference to the mapping table generated in the generation step; a reception step of receiving input of image information; and generating a GUI and synthesizing the GUI with the image information received in the reception step. Transmitting and receiving a GUI. 15. An information transmitting / receiving apparatus that transmits or receives information via a plurality of networks, a reservation step of reserving a band of the network, a generating step of generating a mapping table indicating a communication destination address, A communication step of communicating information with reference to the mapping table generated in the generation step; a reception step of receiving input of image information; a GUI for generating a GUI and combining and outputting the GUI with the image information received in the reception step A recording medium on which a computer-executable program is recorded. 16. A method for receiving a packet transmitted from an information transmitting apparatus belonging to a first network operating based on a first clock and operating based on a second clock asynchronous with the first clock. An information receiving apparatus belonging to a second network, a receiving unit for receiving the transmitted packet; a first clock in the first network based on the packet received by the receiving unit; Detecting means for detecting a second clock shift in the second network; changing means for changing time information included in the packet in response to the shift detected by the detecting means; Output means for outputting the packet received by the receiving means in response to the received time information. Information receiving apparatus according to claim. 17. A storage unit for storing the packet received by the reception unit, wherein the detection unit detects the first clock and the second clock based on an amount of the packet stored in the storage unit. 17. The information receiving apparatus according to claim 16, wherein a clock shift is detected. 18. The information receiving apparatus according to claim 17, wherein said storage means includes a FIFO. 19. According to the detection result of the detection means,
18. The information receiving apparatus according to claim 17, further comprising a storage control unit that stores an empty packet in the storage unit. 20. A method for receiving a packet transmitted from an information transmitting device belonging to a first network operating based on a first clock and operating based on a second clock that is asynchronous with the first clock. A receiving step of receiving the transmitted packet; and a first step in the first network based on the packet received by the processing of the receiving step. And a detecting step of detecting a difference between a clock and a second clock in the second network; and a changing step of changing time information included in the packet in accordance with the difference detected by the processing of the detecting step. And the receiving step corresponding to the time information changed by the processing of the changing step. Information reception method characterized by comprising an output step of outputting a more received the packets. 21. A method for receiving a packet transmitted from an information transmitting device belonging to a first network operating based on a first clock and operating based on a second clock that is asynchronous with the first clock. A program for executing the processing of the second network, the method comprising: a receiving step of receiving the transmitted packet; a first program in the first network based on the packet received by the processing of the receiving step. A detecting step of detecting a difference between a clock and a second clock in the second network; and a changing step of changing time information included in the packet in accordance with the difference detected by the processing of the detecting step. Receiving the information in the receiving step in accordance with the time information changed in the processing in the changing step; It has been recorded medium from which a computer-executable program is recorded, characterized in that it comprises an output step of outputting the packet.