WO2007114297A1

WO2007114297A1 - Communication terminal apparatus, communication control apparatus, and telephone conversation recording/reproducing method

Info

Publication number: WO2007114297A1
Application number: PCT/JP2007/056963
Authority: WO
Inventors: Takashi Endoh
Original assignee: Kyocera Corporation
Priority date: 2006-03-30
Filing date: 2007-03-29
Publication date: 2007-10-11
Also published as: JP2007267337A

Abstract

There are included a receiving part that receives, from a communication terminal apparatus with which a telephone communication is to be established, information related to a permission of reproducing the contents of a telephone conversation as recorded; a recording part that records the contents of the telephone conversation in association with the information related to the permission of reproducing those telephone conversation contents; and a reproducing part that reproduces the contents of the telephone conversation recorded by the recording part, based on the information related to the permission of reproducing those telephone conversation contents and recorded in association with the telephone conversation contents. In a case where the information related to the reproduction permission includes information of requesting the foregoing communication terminal apparatus to confirm the reproduction, only if the foregoing communication terminal apparatus confirms and permits the reproduction, then the telephone conversation contents are reproduced.

Description

Specification

COMMUNICATION TERMINAL DEVICE, COMMUNICATION CONTROL DEVICE, AND CALL RECORDING / REPRODUCING METHOD

Technical field

TECHNICAL FIELD [0001] The present invention relates to a communication terminal device, a communication control device, and a call recording / reproducing method, and in particular, a communication terminal device and a communication control device having a recording / reproducing function for recording / reproducing a call content, and recorded call contents. The present invention relates to a call record reproduction method for reproduction.

Background art

Conventionally, videophones and videoconferencing have been performed using videophone devices and videoconferencing devices. At this time, participants' face images and audio are transmitted as digital data to the other party among the participants in the videophone and videoconference, so these data are used as communication information (call information) in the other party's terminal device. If recorded, the original videophone may be reused for purposes other than the purpose of communication in the video conference.

[0003] In order to prevent such unexpected reuse, these data (communication information) are created by the sender and therefore have a copyright. There was a desire for a device that could claim the existence of this and prohibit its reuse. Therefore, a “data communication device” (see Patent Document 1) is proposed, which is a communication device that communicates image data, audio data, etc., and that sends restriction information such as storage prohibition from the transmission side to the reception side. Has been. This “data communication device” notifies the usage authority at the start of data communication before sending or receiving the contents. Usage rights include, for example, storage prohibition, usage limit, modification prohibition, and transfer prohibition. The features of the “data communication device” will be described below.

FIG. 19 is a flowchart showing an operation procedure on the receiving side in the conventional data communication apparatus. As shown in FIG. 19, first, when receiving (step S11), it is determined whether or not the right to use is granted (step S12), and if granted (yes), the usage right interpretation program is displayed. Start up (step S13). If not granted (no), the process is terminated.

[0005] After the usage right interpretation program is started, usage rights are interpreted (step S14), and interpretation data is registered (step S15). After that, determine whether the force is prohibited to save (Step S16), if the result of the judgment is forbidden (yes), the data is displayed (Step S17), the process is terminated without being saved, and if not forbidden (no), the data Both saving and data display are executed (step S18), and the process ends.

FIG. 20 is a flowchart showing an operation procedure for limiting the number of uses in a conventional data communication apparatus. As shown in Figure 20, first, it is determined whether or not there is a limit on the number of uses (step S21). If the result of the determination is that there is a limit (yes), it is determined whether or not the current number of uses is within the limit. However (step S22), if there is no limit (no), read is permitted (step S23) and the process is terminated.

[0007] Next, if there is a limit, it is determined whether or not the current number of uses is within the limit (step S22). If it is within the limit (yes), reading is permitted (step S23) and the process is terminated. However, if it is not within the limits! No (no), reading is prohibited (step S24) and the process is terminated.

Patent Document 1: Japanese Patent Laid-Open No. 2002-57737

Disclosure of the invention

Problems to be solved by the invention

However, in the conventional “data communication device” (see Patent Document 1), since the use authority is notified and set at the start of communication, it is necessary to store during communication where storage is prohibited. In the event of a situation, the recipient was powerful enough to save. On the other hand, if a situation occurs that is difficult to see during a communication that allows storage, it is impossible for the sender to delete that part or the whole later.

[0009] In addition, it is possible that there is a change in intention that t allowed to save, but wanted to prohibit playback after the end of communication, or vice versa, but allowed to save if considered later However, he was unable to renew such usage rights.

An object of the present invention is to provide a communication terminal device, a communication control device, and a communication recording / reproducing method that can set or confirm permission or non-permission of reproduction of recorded communication information after each event. Is to provide.

Means for solving the problem

[0010] In order to achieve the above object, a communication terminal device according to the present invention receives, from a communication terminal device targeted for a call, information related to permission to reproduce the recorded call content after the call is recorded. Receiving means for recording, recording means for recording the call contents in association with information related to permission to reproduce the call contents, and reproducing the call contents recorded by the recording means And a reproducing means for reproducing the call contents based on the information relating to the reproduction permission of the call contents recorded in association with the reproduced call contents.

[0011] The communication control device according to the present invention includes: a receiving unit that receives information on permission to reproduce the recorded call content after recording the call from the communication terminal device during the call; and the communication during the call Terminal device power Recording that records the call content in association with information related to permission to reproduce the call content received by the receiving means from the communication terminal device during the call when receiving an instruction to record the call content And when the call content recorded by the recording means is played back, the call content is instructed to be played back based on the information regarding the permission to play back the call content recorded in association with the call content to be played back. Transmitting means for transmitting to the communication terminal device.

[0012] In the communication recording / reproducing method according to the present invention, a process of receiving information relating to reproduction permission of the recorded call content after recording the call from the communication terminal device to be called, and recording the call content The call content and the information related to the permission to reproduce the call content are recorded in association with each other, and when the recorded call content is reproduced, the call is recorded in association with the content of the call to be reproduced. And a process for playing back the content of the call based on information relating to permission to play back the content.

The invention's effect

[0013] According to the present invention, it becomes possible to set permission or non-permission of reproduction of recorded communication information after the fact or confirm each time reproduction is performed.

Brief Description of Drawings

FIG. 1 is a block diagram showing a configuration of a videophone device according to a first embodiment of the present invention.

FIG. 2 is a block diagram for explaining a communication environment when the videophone device of FIG. 1 performs videophone communication.

FIG. 3 shows an operation procedure for recording videophone communication in the videophone device of FIG. It is a flowchart.

FIG. 4 is a flowchart showing an operation procedure of a subroutine S105 in FIG.

[5] FIG. 5 is a flowchart showing the operation procedure in the second portable terminal device that has received the recording start notification transmitted in S111 of FIG.

[6] FIG. 6 is an explanatory diagram (part 1) of display contents on the display device of the second portable terminal device.

FIG. 7 is an explanatory diagram (part 2) of display contents on the display device of the second portable terminal device. [8] FIG. 8 is an explanatory diagram (part 3) of display contents on the display device of the second portable terminal device. [9] This is a flowchart showing the operation procedure of the first portable terminal device when the update information is received.

[10] This is a flowchart showing an operation procedure for reading and reproducing the communication information recorded by the first mobile terminal device.

FIG. 11 is a flowchart showing an operation procedure of subroutine S 142 of FIG.

[12] FIG. 12 is a block diagram showing a configuration of a videophone device according to a second embodiment of the present invention.

[13] FIG. 13 is a block diagram for explaining a communication environment when the videophone device of FIG. 12 performs videophone communication.

[14] FIG. 14 is a flowchart showing an operation procedure for recording videophone communication in the first portable terminal device of FIG.

FIG. 15 is a flowchart showing an operation procedure of subroutine S205 of FIG.

16) This is a flowchart showing the operation procedure when each videophone device receives a recording start notification.

[17] This is a flowchart showing an operation procedure for reading and reproducing the communication information recorded by the first portable terminal device.

FIG. 18 is a flowchart showing an operation procedure of subroutine S242 of FIG.

FIG. 19 is a flowchart showing an operation procedure on the receiving side in the conventional data communication apparatus.

[20] This is a flow chart showing the operation procedure for limiting the number of uses in a conventional data communication device. Explanation of symbols

10, 30 Videophone device 10a, 30a First mobile terminal device 10b, 30b Second mobile terminal device

11 AV input / output section

12 = 3—Deck 咅 15

13 Control unit

14, 35 Communications Department

15, 37 hard disk

16 Cryptographic part

17 Key recorder

18, 36 Signature Management Department

19 Net

20 Communication control server

31 Recording server

32 CPU

33 ROM

34 RAM

a Authorization information

b Encrypted communication information c Key

d Communication information

P1 video

P2 video

P3 to P5 Sub screen

P6 talk time

P7 message

P9 Choice P10 options

BEST MODE FOR CARRYING OUT THE INVENTION

Hereinafter, the best mode for carrying out the present invention will be described with reference to the drawings.

(First embodiment)

FIG. 1 is a block diagram showing the configuration of the videophone apparatus according to the first embodiment of the present invention. As shown in FIG. 1, a video telephone 10 includes an audio 'Video (AV) input / output unit 11, a codec unit (playback means) 12, a control unit 13, and a communication unit (reception unit). Means) 14, hard disk (recording means) 15, encryption unit 16, key recording unit 17, and signature management unit 18. In the present embodiment, the videophone device 10 is a mobile communication terminal device having a videophone function, and can record communication information on the hard disk 15. Note that the recording means includes not only a hard disk but also a recording by a semiconductor memory or the like.

[0017] The AV input / output unit 11 is an analog interface for connecting a camera, a display, a microphone, and a speaker of the videophone device 10, and includes analog signal amplification, A (Analog) ZD (Digital) conversion, DZA conversion, And a circuit for adjusting the signal. The camera, display, microphone, speaker, etc. may be built in the mobile communication terminal device.

The codec unit 12 has an encoder that compresses the AV signal digitized by the AV input / output unit 11 and a decoder function that decompresses the compressed code. A dedicated circuit and a DSP (Digital Signal Processor) And RAM (Random Access Memory) etc.

[0018] For video, well-known MPEG4 (Moving Pictures Experts Group 4), I TU-T H.263, and other codecs can be used, and for audio, the well-known AAC (Advanced Audio Coding) is used. , AMR (Adaptive Multi-Rate), and other codecs.

The control unit 13 controls each part of the videophone device 10 to realize various operations of the videophone device 10. This control unit 13 is an arithmetic processing unit normally used in computer equipment, and is a CPU (Central Processing Unit), RAM (Random Access memory), ROM (read only memory), hardware such as a bus, and software capabilities stored in the ROM are also configured.

[0020] The communication unit 14 uses data communication of a mobile phone network, and performs wireless communication with a data communication base station of the mobile phone device. That is, communication information (call information) is transmitted and received between the videophone device 10 and the videophone device 10 to be communicated. For data communication, the wireless layer protocol is executed with the base station. Furthermore, a protocol such as IP (Internet Protocol) or TCP (Transmission Control Protocol) is executed with the control unit 14 by software.

The hard disk 15 is a large-capacity general-purpose recording device, and records communication information (call information) such as images and sounds to be communicated. In this hard disk 15, a plurality (n) of permission information a and encrypted communication information b are recorded in association with each other for each transmitting-side videophone device 10. The permission information is information relating to permission to reproduce communication information (call information). The encryption unit 16 generates a key c stored in the key recording unit 17, and encrypts the communication information to be communicated using the key c. Deceiving or decoding in reverse. The cipher used here is a common key cipher, such as AES (Advanced Encryption Standard).

[0022] The key recording unit 17 is a storage device protected so that the key c is not read by an unauthorized program, and the signal line for reading the stored contents is not exposed like a bus, The communication signal line is exposed. The key c recorded in the key recording unit 17 can be extracted only when the authentication is successful through communication using a predetermined protocol.

[0023] The signature management unit 18 verifies the signature and sends it when a message (for example, permission information a or update information) sent from the other party's videophone device 10 has been digitally signed. It is determined that the person has not been tampered with. In order to execute this, the signature management unit 18 receives the public key transmitted from the other party's videophone device 10 and authenticates and stores that the public key is correct. In order to authenticate that the public key is correct, an electronic signature should be given in advance by a common certificate authority, and the signature should be verified with the public key of the certificate authority. FIG. 2 is a block diagram for explaining a communication environment when the videophone device of FIG. 1 performs videophone communication. As shown in FIG. 2, the first mobile terminal device 10a is connected to a network (communication network) 19 using IP (Internet Protocol) using data communication of a mobile phone. The IP network 19 can also be connected to the power Internet established by mobile phone companies. When the first mobile terminal device 10a starts videophone communication with the second mobile terminal device 10b, the communication control server 20 connected to the network 19 is used.

[0025] The communication control server 20 sends a short mail to the second portable terminal device 10b to notify that it is called. In response to this, the second portable terminal device 10b starts data communication, connects to the network 19, and responds to the communication control server 20. The communication control server 20, the first mobile terminal device 10a, and the second mobile terminal device 10b start videophone communication using SIP (Session Initiation Protocol).

FIG. 3 is a flowchart showing an operation procedure for recording videophone communication in the videophone device of FIG. As shown in FIG. 3, first, the first mobile terminal device 10a and the second mobile terminal device 10b start videophone communication via the communication control server 20 (step S101). After the start, the public key is transmitted to the other videophone device (step S102). The public key is digitally signed by a known certificate authority to eliminate impersonation.

[0027] Therefore, if the public key of the certificate authority is recorded in the signature management unit 18 in advance and the signature of the certificate authority is verified using this, the public key transmitted by the partner videophone device is surely compatible. You can know that it belongs to the hand. The public key that has received the other party's videophone capability is stored in the signature management unit 18 and used for verification of the electronic signature received thereafter.

An electronic signature is an attachment of data obtained by encrypting the hash data of a document to be transmitted with the sender's private key, and can be decrypted only with the sender's public key. If the received document power matches the created hash data, it can be confirmed that the falsification has been successful and that the owner of the private key corresponding to the public key has signed.

[0028] Next, permission information a that is preset / sent is transmitted to the other videophone device (step S103). This process is executed only once after the communication is started. Permission Information a is assumed to be set in advance by the owner of the videophone device The intention of the operator of the videophone device is still set! In this case, the factory permission information a is used. Is done.

[0029] The permission information a sets, for example, whether to permit recording, to disallow or to confirm the communication information d to be transmitted. In addition, certain parties are permitted as exceptions, confirmation is required for those registered in the phone book, and recording is not permitted for those who are not registered in the phone book. , Etc. can be set. The permission information a is digitally signed by the transmitting videophone device. After receiving permission information a from the other party's videophone device, verify the digital signature attached and verify that it has been tampered with.

Next, it is determined whether or not recording is started (step S 104). This is a process for determining whether or not a recording start event has occurred when an event occurs while waiting for an event. When the operator of the first mobile terminal device 10a instructs to start recording by operating a key, a recording start event occurs.

If the result of determination in step S104 is a recording start event (yes), whether or not the control unit 13 of the first mobile terminal device 10a executes recording (step S105) and then determines whether or not the videophone communication is terminated. If it is determined (step S106) and it is not a recording start event (no), it is subsequently determined whether or not it is the power to end the videophone communication (step S106).

[0031] As a result of the determination in step S106, if the event that has occurred is to notify the end of the videophone communication (yes), the process is terminated. On the other hand, if the end of the videophone communication is not notified (no), the process returns to step S104 and waits for the next event to occur.

FIG. 4 is a flowchart showing the operation procedure of subroutine S 105 of FIG. As shown in FIG. 4, when the control unit 13 of the first mobile terminal device 10a starts recording, the first mobile terminal device 10a notifies the second mobile terminal device 10b with which the communication partner is communicating (step). Sl ll). After the notification, the permission information a received at the start is recorded in the area of the second mobile terminal device 10b of the hard disk 15 in association with the encryption key communication information b to be recorded (step S112).

Next, the encryption unit 16 generates a key c (Step S 113). Key c generates AES cipher Is a 128-bit key. Although the encryption unit 16 is installed in the first mobile terminal device 10a, it plays the role of preventing the recorded encryption communication information b from being illegally used by the program power on the first mobile terminal device 10a. Each time, generate a key c using a random number

[0033] After generating the key c, the key c is recorded in the key recording unit 17 (step S114). As described above, the key recording unit 17 is a limited memory that cannot be directly accessed from the videophone device and can read a value according to a predetermined protocol. Since the encrypted communication information b is not illegally used from the first portable terminal device 10a, the key c necessary for decrypting the encryption is prevented from being read by an unauthorized program. In other words, in order to read out the key c from the key recording unit 17, the key recording unit 17 must authenticate the program ID (Identification) given in advance, and the altered program or registered in advance! The cunning ヽ program cannot get the key c.

Next, the encrypted communication information b is recorded on the node disk 15 while encrypting the communication information d received by the encryption unit 16 with the key c (step S 115). The encrypted communication information b is recorded in association with the permission information a in the area of the second mobile terminal device 10b.

Thereafter, it is determined whether or not the power to end the videophone communication is satisfied (step S116). As a result of the determination, if the videophone communication is terminated (yes), the process is terminated. If the videophone communication is not terminated! (No), the process returns to step S115.

FIG. 5 is a flowchart showing an operation procedure in the second portable terminal device that has received the recording start notification transmitted in S111 of FIG. As shown in FIG. 5, the second mobile terminal device 10b that has received the recording start notification first displays the start of recording and the current permission information a (step S121). That is, the recording is started by the first mobile terminal device 10a which is the communication partner, and the current permission information a is displayed.

Here, the display contents on the display device of the second portable terminal device 10b will be described.

FIG. 6 is an explanatory diagram (part 1) of the display contents on the display device of the second mobile terminal device, and FIG. 7 is an explanatory diagram (part 2) of the display content on the display device of the second mobile terminal device. The other party's video Pl, own video P2, sub-screens P3 to P5, and call duration P6 are displayed on the screen during videophone communication (see FIG. 6). The first mobile terminal device with which you are communicating When the recording start notification is received from the device 10a, the current permission setting screen is displayed (see Fig. 7). In this permission setting screen, according to the preset permission information a, “△△ started recording. Current permission setting Video: Not possible Audio: Permitted number: Unlimited Playback Check: Not required” Message P7 is displayed, which also includes writing skills.

[0037] Furthermore, on the permission setting screen, a message P8 consisting of the characters "Do you want to change the current setting?" Is displayed to prompt the operator to input, and "Yes" appears on the sub screen P4. “No” is displayed on P5.

Next, the second portable terminal device 10b displays the start of recording and the current permission information a (step S121), and then inputs change and approval by key operation by the operator (step S122). Here, if the operator presses the center key of the second mobile terminal device 10b and selects “Yes” on the sub-screen P4 (see FIG. 7), the setting change screen for the permission information a is displayed and the operation is performed. If the user presses the right soft menu key and selects “No” on the sub-screen P5 (see Fig. 7), it will be displayed and no change will be made assuming that the permission information a has been accepted.

FIG. 8 is an explanatory diagram (part 3) of the display contents on the display device of the second portable terminal device.

In the setting change screen for permission information a shown in Fig. 8, the options that can be changed are underlined, for example, option P9, move the option with the up and down keys, and select the option with the right key. Do. The options that can be changed at present are displayed as a box like option P10, with a triangle pointing to the right.

In other words, “Allow” and “Disable” can be selected as the video and audio options. When “Allow” is selected, “1 time”, “10 times”, and “Unlimited” are selected in the frequency options. Selectable. “Once” specifies that playback is allowed only once, and “10 times” specifies that playback is allowed 10 times and is not allowed thereafter. The confirmation option at the time of playback is to specify confirmation request information, and “every time”, “every 10 times”, “unnecessary”, and “every elapsed time” can be selected. “Every 10 times” specifies that confirmation is to be made when the number of playbacks is 10, 20, etc., and “Elapsed time” specifies that confirmation is performed at a predetermined time, for example, every month. To do.

In FIG. 8, “help” is displayed on the sub-screen P3, “Ok” is displayed on the sub-screen P4, and “Cancel” is displayed on the sub-screen P5. When the operator presses the center key and selects “Ok”, the current setting is accepted as accepted and the operator presses the right soft menu key. If the button is pressed and “Cancel” is selected on sub screen P5, the currently displayed content is discarded and the previous screen (see Figure 7) is restored.

[0041] If the operator's consent is obtained, it is determined whether or not there is a change (step S123, see Fig. 5). If the content approved by the operator has already changed to the content already notified to the first mobile terminal device 10a (yes), update information to be sent to the first mobile terminal device 10a that is the partner is created (step S). 124) If there is no change (no), the process is terminated. The update information reflects the contents approved by the operator, and data in a predetermined format is created.

[0042] After creating the update information, the signature management unit 18 adds an electronic signature to the update information (step S125). Since the updated information must be protected against falsification and impersonation, an electronic signature is added to ensure that the second portable terminal device 10b is surely required. The electronic signature is obtained from the update information data to be transmitted, and is obtained by encrypting it with the private key of the second portable terminal device 10b.

Next, the signed update information is transmitted to the recording means of the first mobile terminal device 10a (step S126). The recording means is composed of a control unit 13, a hard disk 15, an encryption unit 16, and a key recording unit 17 in the videophone apparatus in the present embodiment.

FIG. 9 is a flowchart showing the operation procedure of the first portable terminal device when the update information is received. This operation procedure is called in response to the occurrence of an event that the other party's videophone device update information has been received.

As shown in FIG. 9, first, the signature management unit 18 determines whether or not the electronic signature of the update information received is correct (step S 131). That is, the hash data of the received document is obtained, the electronic signature is compared with the one decrypted with the public key of the second portable terminal device 10b, and if it matches, the second portable terminal device is surely not falsified and surely It can be confirmed that it was created by 10b.

If the electronic signature is correct (yes) as a result of the determination, the first mobile terminal device 10a updates the permission information a according to the update information (step S132). . The updated permission information is recorded in association with the encrypted communication information b in the area of the second portable terminal device 10b of the hard disk 15. FIG. 10 is a flowchart showing an operation procedure for reading and reproducing the communication information recorded by the first mobile terminal device. As shown in FIG. 10, first, permission information a recorded in association with encrypted communication information b to be reproduced is read from the hard disk 15 (step S141).

After reading the permission information a, the confirmation request information is processed (step S 142). This is a process of the confirmation request information subroutine stored in the permission information a, and details will be described later.

Next, the permission information a is checked to determine whether or not the reproduction is permitted and whether or not the power is sufficient (step S143). As a result of the determination, if reproduction is permitted (yes), the key c corresponding to the encrypted communication information b to be reproduced is obtained from the key recording unit 17 (step S 144). At this time, the key recording unit 17 determines by authentication that the program that executes the reading is not illegal. If the program is registered in advance, the key c can be acquired. On the other hand, if playback is not permitted (no), the process ends.

[0047] After obtaining the key c from the key recording unit 17, the encrypted communication information b to be reproduced is read from the hard disk 15 (step S145), and based on the read encrypted communication information b. Then, the encryption unit 16 decrypts the encryption, extracts plaintext communication information d, and supplies it to the codec unit 12 (step S146). The cipher uses the corresponding key c.

Thereafter, the data included in the decoder communication information a of the codec unit 12 is decoded and supplied to the AV input / output unit 11 (step S147). The AV input / output unit 11 performs AZD conversion on the supplied digital data and supplies it to the playback device as an analog signal. The AV input / output unit 11 to which the decrypted data is supplied reproduces the screen and the sound wave by the playback device connected to the AV input / output unit 11, that is, the display and the speaker (step S148), and ends the process. .

FIG. 11 is a flowchart showing an operation procedure of subroutine S 142 in FIG. As shown in FIG. 11, first, it is determined whether or not the permission information a includes confirmation request information (step S151). Whether or not to include the confirmation request information is determined by the second portable terminal device 10b or the operator who was the other party. As a result of the determination, if there is confirmation request information (yes), it is determined whether or not the confirmation request condition is satisfied (step S152). If not (no), the process ends and returns.

As described above, for example, “every time”, “every 10 times”, “unnecessary”, “every elapsed time”, etc. can be specified as the confirmation request condition. If the requirement is satisfied and “unnecessary”, the confirmation requirement is not always satisfied.

If the confirmation request condition is satisfied (yes) as a result of determining whether or not the confirmation request condition is satisfied (step S152), the confirmation information to be transmitted to the second mobile terminal device 10b is created according to a predetermined format. (Step S153) If the confirmation requirement is not satisfied (no), the process is terminated and the process returns.

[0050] Next, the confirmation information created by the communication unit 14 is transmitted to the second mobile terminal device 10b (step S154), and update information from the second mobile terminal device 10b is awaited (step S155). When update information is received, an event is generated, which triggers execution of update processing of permission information a, which is the next subroutine. When the update information is received, the permission information a is updated according to the received update information (step S156). This process is performed in the same procedure as the operation procedure of the first mobile terminal device when the update information is received (see FIG. 9).

[0051] (Second embodiment)

FIG. 12 is a block diagram showing the configuration of the videophone apparatus according to the second embodiment of the present invention. As shown in FIG. 12, the videophone device 30 includes an AV input / output unit 11, a codec unit 12, a control unit 13, a communication unit 14, and a signature management unit 18. The signature management unit 18 stores a secret key and is in charge of processing for giving an electronic signature to transmission data. It also verifies the received electronic signature by storing the public key. The videophone device 30 of the present embodiment is a mobile terminal device having a television phone function.

That is, the videophone device 30 according to the second embodiment has a configuration in which the recording means is removed from the videophone device 10 according to the first embodiment (see FIG. 1). The recording server 31 is provided.

The recording server (communication control device) 31 includes a CPU 32, a ROM 33, a RAM 34, a communication unit (reception unit, transmission unit) 35, a signature management unit 36, and a node, which are included in an arithmetic processing unit such as a computer device that is normally used. A hard disk (recording means) 37 is provided. In the hard disk 37, permission information a and communication information d are recorded in association with each videophone device 30. It is recorded.

[0053] The signature management unit 36 of the recording server 31 stores the public key, verifies the public key or the electronic signature when it is received, and stores at least the public key of the common certificate authority. . This signature management unit 36 proves that it is the correct recording server, and stores its public key signed by the certificate authority for encrypted communication with each videophone device 30. The public key is transmitted to each videophone device 30. That is, since the recording server 31 is a separate device from any videophone device 30, the communication information d need not be encrypted and recorded.

In the videophone device 30 according to the second embodiment, the same components as those of the videophone device 10 according to the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The description of the same operation as that of the videophone device 10 according to is omitted.

FIG. 13 is a block diagram illustrating a communication environment when the videophone device of FIG. 12 performs videophone communication. As shown in FIG. 13, the communication environment in the second embodiment is substantially the same as the communication environment in the first embodiment, but the recording server 31 is connected to the network 19 and connected to each portable terminal device 30. The communication control server 20 is different in that the communication information is transmitted to the recording server 31. For this reason, unlike the communication environment in the first embodiment, the first mobile terminal device 30a and the second mobile terminal device 30b pass through the communication control server 20 which does not directly transmit / receive the communication information d. Then send 'receive.

[0055] Since all the communication information d passes through the communication control server 20, a videophone Z conference in which three or more videophone devices 30 participate can be realized. In this case, the communication control server 20 serves as an MCU (Multipoint Control Unit) or a reflector. FIG. 14 is a flowchart showing an operation procedure for recording videophone communication in the first videophone apparatus of FIG. As shown in FIG. 14, first, the first mobile terminal device 30a and the second mobile terminal device 30b start videophone communication via the communication control server 20 (step S201).

Next, the first mobile terminal device 30a and the second mobile terminal device 30b transmit the public key to the communication control server 20 (step S202). This is because the recording means is in the recording server 31 in the present embodiment, and the recording server 31 needs to verify the electronic signature. Since the IP address of the videophone device may change for each recording, each videophone device cannot assume the IP address of the recording server 31. Therefore, it is registered in the communication control server 20 and notified from the communication control server 20 to the recording server 31 at the start of recording.

[0057] After transmitting the public key, permission information a preset in each videophone device is transmitted to the communication control server 20 (step S203). This process is executed only once after communication is started. This permission information a should also be sent to the recording server 31, but is registered in the communication control server 20, and notified from the communication control server 20 to the recording server 31 at the start of recording.

Next, it is determined whether or not recording is started (step S204). This is a process for determining whether or not a recording start event has occurred when an event occurs while waiting for an event. When the operator of the first portable terminal device 30a instructs to start recording by operating a key, a recording start event occurs.

[0058] If the result of determination in step S204 is a recording start event (yes), videophone communication is terminated after the control unit 13 of the first mobile terminal device 30a executes recording (step S205). If it is not a recording start event (no), it is subsequently determined whether or not to terminate the videophone communication (step S206).

As a result of the determination in step S206, if the event that has occurred is a notification of the end of the videophone communication (yes), the process ends. On the other hand, if it is not a notification of the end of the videophone communication (no), the process returns to step S204 and waits for the next event to occur.

FIG. 15 is a flowchart showing an operation procedure of subroutine S205 of FIG. This subroutine S205 is a process executed by the control unit 13 of the first portable terminal device 30a, which is executed when a recording start event occurs.

As shown in FIG. 15, when the control unit 13 or the like of the first mobile terminal device 30a starts recording, the first mobile terminal device 30a notifies the communication control server 20 of the start of recording (step S211). After notifying the start of recording, the communication control server 20 notifies the recording server 31 of the start of recording. Further, permission information a preset for each videophone device notified by each videophone device is sent to the recording server 31. Send (step S212).

[0060] Next, the recording server 31 relates the received permission information a to the communication information d to be recorded. The data are linked and recorded in the area of each videophone device on the hard disk 37 (step S213). Thereafter, the communication control server 20 notifies each videophone device of the start of recording (step S214). This notification includes the IP address of the recording server 31, which allows each videophone device to communicate with the recording server 31.

[0061] After notifying each videophone device of the start of recording, the communication control server 20 transmits the communication information d to the recording server 31 (step S215), and the recording server 31 receiving the communication information d receives the received communication information. d is recorded in the area of each videophone device on the hard disk 37 (step S216). The recorded communication information d is associated with permission information a notified by each videophone device.

Next, it is determined whether or not the power to end the videophone communication is determined (step S217). As a result of the determination, if the videophone communication is terminated (yes), the process is terminated. If the videophone communication is not terminated (no), the process returns to step S215.

FIG. 16 is a flowchart showing an operation procedure when the second mobile terminal device 30b receives a recording start notification. The operation procedure here corresponds to the operation procedure (see FIG. 5) in the second mobile terminal device 30b that has been notified of the recording start shown in the first embodiment, and the processing content is step S226. Only the difference.

Each videophone device is notified of the start of recording (see step S214 in FIG. 15), and the second mobile terminal device 30b that has received the notification of recording start, as shown in FIG. The permission information a is displayed (step S221).

[0063] Next, the second portable terminal device 30b inputs a change and consent by a key operation by the operator (step S222), and when the operator's consent is obtained, determines whether or not there is a change. (Step S223). The content accepted by the operator has changed from the content already notified (yes

), Update information to be sent to the recording server 31 is created (step S224). If there is no change (no), the process is terminated.

[0064] After creating the update information, the signature management unit 18 adds an electronic signature to the update information (step

S225), the signed update information is transmitted to the recording server 31 (step S226).

When the recording server 31 receives this update information, the recording server 31 operates in the first portable terminal device 10a when receiving the update information shown in the first embodiment (see FIG. 9). The signed update information is recorded in the recording server 31 by performing the same procedure as in FIG. That is, in the videophone communication system according to the second embodiment, the signed update information is recorded by the recording server 31 (see FIGS. 12 and 13) provided separately from each videophone device. Done. It is possible to make a videophone call between three or more videophone devices 30. In this case, there may be a plurality of second mobile terminal devices 30b.

FIG. 17 is a flowchart showing an operation procedure for reading and reproducing the communication information recorded by the first mobile terminal device 30a. The operation procedure here corresponds to the operation procedure (see FIG. 10) for reading and reproducing the communication information recorded by the first mobile terminal device 30a shown in the first embodiment. However, in the first embodiment, the recording means is provided in the recording server 31 in the second embodiment in the force provided in the first portable terminal device 10a. For this reason, some processes are executed by the recording server 31.

[0066] As shown in FIG. 17, first, the permission information a recorded in association with the encrypted communication information b to be reproduced by the recording server 31 is read from the hard disk 37 (step S241). . After reading the permission information a, the confirmation request information is processed (step S242). This is a process of the confirmation request information subroutine stored in the permission information a.

Next, the permission information a is checked to determine whether or not the power is permitted for reproduction (step S243). As a result of the determination, if playback is permitted (yes), the recording server 31 reads out the communication information d (step S244). This communication information d is recorded on the hard disk 37 of the recording server 31 without being encrypted. On the other hand, if reproduction is not permitted (no), the process is terminated.

[0067] After reading the communication information d, the communication information d is transmitted from the recording server 31 to the first mobile terminal device 3 Oa (step S245). In the first mobile terminal device 30a that has received the communication information d, the codec unit 12 decodes the data included in the communication information a and supplies it to the AV input / output unit 11 (step S246).

Thereafter, the AV input / output unit 11 performs AZD conversion on the supplied digital data, and supplies it to the playback device as an analog signal. The AV input / output unit 11 to which the decrypted data is supplied is a playback device connected to the AV input / output unit 11, that is, a screen and a speaker. Then, the sound wave is reproduced (step S247), and the process is terminated.

FIG. 18 is a flowchart showing an operation procedure of subroutine S242 of FIG. As shown in FIG. 18, the recording server 31 first determines whether or not the permission information a includes confirmation request information (step S251). As a result of the determination, if there is confirmation request information (yes), it is determined whether or not the confirmation request condition is satisfied and the power is sufficient (step S252). Return.

If the confirmation request condition is satisfied (yes) as a result of the determination as to whether or not the confirmation request condition is satisfied (step S252), confirmation information to be transmitted to the second mobile terminal device 30b is created according to a predetermined format. (Step S253), if the confirmation requirement is satisfied! / ヽ (no), the process is terminated and the process returns.

[0069] Next, the recording server 31 transmits the confirmation information created by the communication unit 14 to the second mobile terminal device 30b (step S254), and waits for update information from the second mobile terminal device 30b (step S255). ). When update information is received, an event is generated, and this triggers the execution of the update processing of permission information a, which is the next subroutine. When the update information is received, the permission information a is updated according to the received update information (step S256). This process is performed in the same procedure as the operation procedure of the first portable terminal device when the update information is received (see FIG. 9).

[0070] As described above, the communication terminal device according to the present invention comprises: a receiving means for receiving information on permission to reproduce the recorded call content after recording the call; When recording contents, the recording means for recording the call contents in association with the information regarding the permission to reproduce the call contents, and when reproducing the call contents recorded by the recording means, Replaying means for replaying the content of the call based on information relating to replay permission of the call content recorded in association with each other.

[0071] In addition, when the information regarding the permission to reproduce the call content includes information requesting the communication terminal device that is the call target to confirm the reproduction, the reproduction unit is configured to reproduce the call content. The communication content of the call is reproduced only when the communication terminal device that is the call target confirms whether the reproduction is possible and the reproduction permission is obtained from the communication terminal device that is the call target. The

In addition, the videophone device includes a videophone communication function, and performs videophone communication with the communication terminal device that is the call target having the videophone communication function.

[0072] The communication control device according to the present invention includes: a receiving unit that receives information on permission to reproduce the recorded call content after recording the call from the communication terminal device during the call; and the communication during the call Terminal device power Recording that records the call content in association with information related to permission to reproduce the call content received by the receiving means from the communication terminal device during the call when receiving an instruction to record the call content And when the call content recorded by the recording means is played back, the call content is instructed to be played back based on the information regarding the permission to play back the call content recorded in association with the call content to be played back. Transmitting means for transmitting to the communication terminal device.

[0073] If the information regarding the permission to reproduce the call content includes information indicating that the communication terminal device that transmitted the information is requested to confirm the reproduction, the transmission means When reproducing, the communication terminal device that has transmitted the information confirms whether or not reproduction is possible, and transmits the contents of the call only when the communication terminal device obtains permission for reproduction.

Further, the recording server is connected to a communication network together with the plurality of communication terminal devices, communicates with each of the communication terminal devices, and records call information.

Further, the communication terminal device is a videophone device having a videophone communication function and performing videophone communication between the communication terminal devices.

[0074] In the communication recording / reproducing method according to the present invention, a process of receiving information related to permission to reproduce the recorded call content after recording the call from the communication terminal device to be called, and recording the call content The call content and the information related to the permission to reproduce the call content are recorded in association with each other, and when the recorded call content is reproduced, the call is recorded in association with the content of the call to be reproduced. And processing for reproducing the content of the call based on information relating to permission to reproduce the content.

[0075] Further, a process of receiving information related to permission to reproduce the recorded call content after recording the call from the communication terminal apparatus during the call, and the communication terminal apparatus power during the call A process of recording the call content in association with information related to permission to reproduce the call content received by the receiving unit from the communication terminal device during the call when receiving an instruction to record the call content; Processing to transmit the call content to the communication terminal device instructed to reproduce based on the information regarding the permission to reproduce the call content recorded in association with the call content to be reproduced. Have.

[0076] In addition, when the information regarding the permission to reproduce the call content includes information requesting the communication terminal device to confirm the reproduction, the communication terminal device may be requested to reproduce the call content. The content of the call is reproduced only when reproduction permission is confirmed and permission for reproduction is obtained from the communication terminal device.

Thus, according to the present invention, in the communication terminal device, the receiving means receives and records information related to the reproduction permission of the recorded call content after recording the communication terminal device power call to be called. When the means records the call contents, the call contents are recorded in association with the information regarding the permission to reproduce the call contents, and when the reproduction means reproduces the call contents recorded by the recording means, Based on information related to permission to play back the call contents recorded in association with the contents !, the call contents are played back.

[0078] Further, in the communication control device, the receiving unit receives information related to permission to reproduce the recorded communication content after recording the call from the communication terminal device in communication, and the recording unit receives the communication terminal in communication Device power When receiving an instruction to record the call content, the call content and the communication terminal device power during the call are recorded in association with information related to permission to reproduce the call content received by the receiving means. When the call content recorded by the above is reproduced, the call content is transmitted to the communication terminal device that has instructed the reproduction based on the information regarding the permission to reproduce the call content recorded in association with the call content to be reproduced.

[0079] Further, in the communication recording / playback method, when receiving information from the communication target communication terminal device regarding permission to play back the recorded call content after recording the call and recording the call content, Is recorded in association with the call content playback permission information, and when the recorded call content is played back, the call content is recorded based on the information related to the call content playback permission. Play.

As a result, permission or disapproval of playback of recorded communication information can be set after the fact. You can check each time you play.

[0080] In other words, it is possible to prevent the copyright and portrait right of recorded communication information from being used without permission in a videophone device in which a plurality of terminals participate! When recording, the data is encrypted and recorded, and the encryption key is recorded in a dedicated protected recording unit, thereby reducing the possibility of the encryption being broken by an unauthorized program. . Also, when recording on a recording server provided independently of the videophone device, encryption is not required. For this reason, unexpected unauthorized use of face images and voices can be prevented, and the user can make videophone calls and videophone conferences with peace of mind.

Although the present invention has been described with reference to the above-described embodiment, the present invention is not limited to this embodiment. Accordingly, the present invention can be implemented as a modified form without departing from the spirit of the present invention.

[0081] This application claims the benefit of priority of Japanese Patent Application No. 2006-093316 (filed on Mar. 30, 2006), the entire contents of which are incorporated herein by reference.

Claims

The scope of the claims

[1] receiving means for receiving information on permission to reproduce the recorded call content after recording the call from a communication terminal device to be called;

A recording means for recording the call content in association with information related to permission to reproduce the call content;

Replaying means for replaying the call content based on information relating to permission to replay the call content recorded in association with the replayed call content when replaying the call content recorded by the recording means;

A communication terminal device.

[2] When the information regarding permission to reproduce the call content includes information indicating that the communication terminal device to be called is requested to confirm reproduction, the reproduction unit reproduces the call content when the call content is reproduced. The communication terminal apparatus according to claim 1, wherein the communication terminal apparatus reproduces the contents of the call only when the communication terminal apparatus to be called confirms whether or not reproduction is possible and obtains permission for reproduction from the communication terminal apparatus to be called.

3. The communication terminal device according to claim 1, wherein the communication terminal device is a video phone device that has a video phone communication function and performs video phone communication with the communication terminal device that is the call target having the video phone communication function.

[4] Receiving means for receiving, from a communication terminal device during a call, information related to permission to reproduce the recorded call contents after recording the call;

The communication terminal device power during the call When an instruction to record the call content is received, the call content is associated with the information regarding the permission to reproduce the call content received by the receiving unit from the communication terminal device during the call. Recording means for recording,

A communication terminal that, when playing back the content of a call recorded by the recording means, instructed to play back the content of the call based on information relating to the permission to play back the content of the call recorded in association with the content of the call to be played Transmitting means for transmitting to the device;

A communication control device.

[5] When the information regarding the permission to reproduce the call content includes information requesting the communication terminal apparatus that transmitted the information to confirm the reproduction, the transmission means includes the call 5. The content of a call is transmitted only when the communication terminal device that has transmitted the information confirms whether or not the content can be played back and the permission of playback is obtained from the communication terminal device. Communication control device.

6. The communication control device according to claim 4, wherein the communication control device is a recording server that is connected to a communication network together with the plurality of communication terminal devices, communicates with each of the communication terminal devices, and records call information.

7. The communication control device according to claim 4, wherein the communication terminal device is a videophone device having a videophone communication function and performing videophone communication between the communication terminal devices.

[8] A process of receiving information related to permission to reproduce the recorded call contents after recording the call from the communication terminal device to be called;

A process of recording the call content in association with information related to permission to reproduce the call content when recording the call content;

A process of playing back the call content based on information related to permission to play the call content recorded in association with the call content to be played back when the recorded call content is played back.

A call recording / reproducing method comprising:

[9] A process of receiving from the communication terminal device during a call information related to permission to reproduce the recorded call content after recording the call;

The communication terminal device power during the call When an instruction to record the call content is received, the call content is associated with the information regarding the permission to reproduce the call content received by the receiving unit from the communication terminal device during the call. Recording process,

A process of transmitting the call content to the communication terminal device that has instructed playback based on information related to permission to play back the call content recorded in association with the call content to be played when playing the recorded call content When

A call recording / reproducing method comprising:

[10] When the information on permission to reproduce the call content includes information indicating that the communication terminal device requires confirmation of reproduction, the information is reproduced on the communication terminal device when the call content is reproduced. Only if the permission of playback is obtained from the communication terminal device. The call recording / reproducing method according to claim 8, wherein the call contents are reproduced.