JP4270730B2 - Data terminal equipment - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data terminal device which starts reproduction from content data received last when content data is received from an external device.
[0002]
[Prior art]
In recent years, with the progress of information communication networks such as the Internet, it has become possible for each user to easily access network information using a personal terminal using a mobile phone or the like.
[0003]
Then, the user downloads various content data via a network using a mobile phone or the like.
[0004]
When downloading content data, the mobile phone or the like accesses a server holding the content data, and transmits information specifying the content data desired to be downloaded to the server.
[0005]
Then, the server specifies the content data based on the information specifying the content data, and transmits the content data to a mobile phone or the like.
[0006]
Then, the cellular phone or the like records the received content data on a recording medium. Also, when reproducing content data from a recording medium, a mobile phone or the like reproduces the content data in the order in which the content data is downloaded.
[0007]
[Problems to be solved by the invention]
However, the user normally wants to immediately reproduce the received content data and confirm whether the received content data is the expected content data. However, since the conventional content reproduction apparatus reproduces the content data in the order in which it was recorded, it cannot be reproduced without user operation. When the received content data is to be reproduced immediately, it is necessary to search the content data, which is troublesome.
[0008]
Therefore, the present invention has been made to solve such a problem, and an object of the present invention is to provide a data terminal device capable of reproducing from newly received content data when the content data is received. is there.
[0009]
[Means for Solving the Problems and Effects of the Invention]
A data terminal device according to the present invention relates to a recording unit for recording content data received from an external device, and a reproduction order of the content data Playback number And an information holding unit for holding the reproduction order Playback number A reproducing unit for reproducing the recorded content data, and the received content data Playback number And held in the information holding unit Corresponds to the playback number A control unit that controls the playback unit so that the content data is played back next, and the control unit plays back the recorded content data in order from the last recorded content data. Held in the information holding unit Playback number The In the playback number of the last recorded content data Update memorize.
[0010]
In the data terminal device according to the present invention, when the content data is received, the reproduction number indicating the reproduction order of the content data received from the external device is updated and recorded in the information holding unit. When the content data is reproduced, the reproduction number stored in the information holding unit is read, and the reproduction is performed from the content data corresponding to the reproduction number. Note that update storage means that when a reproduction number is already stored, the stored reproduction number is erased and the reproduction number of the newly received content data is stored. The same applies to the following.
[0011]
Therefore, according to the present invention, when the user wants to reproduce from the received content data, the user can reproduce from the received content data without taking the trouble of searching for the content data.
[0012]
Preferably, at the time of receiving the content data, the control unit assigns and records a reproduction number to each of the received plurality of content data, and based on the assigned reproduction number, Playback number Is the most small The content data is stored in the information storage unit so that it can be played back next time. Playback number related to the playback order of content data The , To the smallest playback number Update memorize.
[0013]
When a plurality of pieces of content data are received from the external device, the control unit, among the received pieces of content data, Playback number Is the most small Playback starts from content data The smallest The reproduction number is updated and stored in the information holding unit. At the time of reproduction, reproduction is started from the content data corresponding to the reproduction number updated and stored in the information holding unit.
[0014]
Therefore, according to the present invention, when a plurality of pieces of content data are newly received, the newly received pieces of content data can be played back in ascending order of playback numbers.
[0015]
Preferably, the recording unit includes a reproduction list for associating the content data with the reproduction number, and the control unit of the data terminal device reads out the reproduction number included in the reproduction list. , Information holding part Regarding the playback order of content data Play number To the read playback number Update memorize.
[0016]
Control unit records Part The reproduction number included in the reproduction list is read out, and the read reproduction number is updated and stored in the information holding unit. When reproducing the content data, the reproduction number stored in the information holding unit is read and the reproduction number is recorded. Part Send to and record Part Transmits content data corresponding to the received reproduction number to the data terminal device based on the reproduction list. The control unit of the data terminal device gives the received content data to the reproduction unit.
[0017]
Therefore, according to the present invention, the reproduction number and the content data can be associated with each other by the reproduction list. In other words, if the playback number is specified, the position of the content data corresponding to the specified playback number can be specified, and the corresponding content data is recorded. Part Can be read from.
[0018]
Preferably, the external device is another data terminal device.
Another data terminal device receives the content data. Then, the data terminal device accesses another data terminal device and receives desired content data from the other data terminal device. Then, the control unit of the data terminal apparatus that has received the content data updates and stores the reproduction number of the received content data in the memory.
[0019]
Therefore, according to the present invention, even when content data is received from another data terminal device that has received the content data, it can be reproduced from the received content data.
[0020]
Preferably, the external device is a distribution server that holds content data.
The data terminal device accesses the distribution server and receives the desired content data. Then, the control unit updates and stores the reproduction number of the received content data in the information holding unit.
[0021]
Therefore, according to the present invention, it is possible to access the distribution server by the data terminal device, receive the desired content data from the distribution server, and reproduce from the received content data.
[0022]
Preferably, the information holding unit records Part It is provided inside.
The information holding unit records Part And the control unit of the data terminal device records the content data during playback. Part The information holding unit is accessed, and the reproduction number to be reproduced next is acquired, and then reproduction is started from the content data corresponding to the reproduction number.
[0023]
Therefore, according to the present invention, the content data and the reproduction number of the content data to be reproduced next can be stored integrally. As a result, reproduction from newly received content data can be reliably started.
[0027]
DETAILED DESCRIPTION OF THE INVENTION
Embodiments of the present invention will be described in detail with reference to the drawings. In the drawings, the same or corresponding parts are denoted by the same reference numerals and description thereof will not be repeated.
[0028]
In the present invention, the content data to be distributed is not limited to music data, and may be any data such as image data (including both still images and moving images), text data, and the like. Further, the content data may be distributed in plain text or may be distributed after being encrypted by a predetermined encryption method.
[0029]
As described above, in the present invention, various types of content data are targeted. In the following, music data will be described as an example in order to simplify the description.
[0030]
A content data distribution system to be reproduced by a data terminal device according to the present invention will be described.
[0031]
[Embodiment 1]
FIG. 1 shows a content data distribution system using a mobile phone network according to the first embodiment. The distribution server 10 holds a plurality of music data as content data. A user of the mobile phone 30 makes a call to the distribution server 10 via the mobile phone network 20 and designates a song name of music data desired to be received.
[0032]
Then, the distribution server 10 checks whether or not the music data of the designated song name is held. The distribution server 10 transmits the designated music data to the mobile phone 30 via the mobile phone network 20 when holding the music data of the designated song name.
[0033]
The mobile phone 30 records the received music data on the memory card 40 attached. Then, the user of the mobile phone 30 starts reproduction from the music data distributed last to the memory card 40, not according to the order in which the music data is distributed to the memory card 40, by a method described later. Then, the user listens to the music reproduced through the headphones 50 connected to the mobile phone 30.
[0034]
In addition to the music data (or encrypted music data and content key), the distribution server 10 may hold a charging database and charge each time the music data is distributed to the mobile phone 30. In this case, the charge may be determined based on the number of music data requested for distribution or the distribution time.
[0035]
Referring to FIG. 2, the mobile phone 30 shown in FIG. 1 includes a communication unit 301, a key operation unit 302, a controller 303, a display 304, a memory card interface 305, a playback unit 306, a memory 307, A speaker 308 and a terminal 309 are provided.
[0036]
The communication unit 301 includes an antenna, and exchanges data with the distribution server 10 in the distribution system described above. The key operation unit 302 is used by the user of the mobile phone 30 to input various information.
[0037]
The controller 303 controls the communication unit 301 via the bus BS <b> 2 to transmit a music data distribution request to the distribution server 10 in response to a music data distribution request from the user input via the key operation unit 302. To do. The controller 303 records the music data received by the communication unit 301 from the distribution server 10 on the memory card 40 via the bus BS1 and the memory card interface 305, and stores the reproduction number of the received music data in the memory 307. Update memorize. Furthermore, when playing back music data from the memory card 40, the controller 303 reads out music data corresponding to the playback number updated and stored in the memory 307 from the memory card 40 via the memory card interface 305, as will be described later. The read music data is given to the playback unit 306.
[0038]
The memory card interface 305 exchanges data between the bus BS1 and the memory card 40. The reproduction unit 306 reproduces the music data input from the bus BS1 and outputs a reproduction signal to the speaker 308 and the terminal 309.
[0039]
The memory 307 temporarily stores a reproduction number and the like via the bus BS1. The reproduction number stored in the memory 307 is updated and stored in the reproduction number of the music to be reproduced next every time one music is reproduced. Note that “update storage” means that the reproduction number already stored in the memory 307 is deleted and the reproduction number of the newly received music data is stored.
[0040]
The speaker 308 outputs a reproduction signal obtained by reproducing the music data from the reproduction unit 306 to the outside. The terminal 309 is connected to the headphone 50 and outputs a reproduction signal from the reproduction unit 306 to the headphone 50.
[0041]
The data structure of the memory card 40 will be described with reference to FIG. The memory card 40 holds a reproduction list 61 indicating the reproduction order of music data recorded on the memory card 40. In the case shown in FIG. 3, since music data of four songs is recorded on the memory card 40, the reproduction list 61 is in a state where numbers (No.) = 1 to 4 are jammed. The reproduction list number (No.) indicates the reproduction number of the music data. The reproduction list 61 is configured by extracting titles, artist names, and reproduction times, which are main relevant information, from metadata related to music data. The metadata is composed of related information such as the title, artist name, playback time, songwriter, and composer of the music data. When the music data is distributed from the distribution server 10 to the mobile phone 30, the metadata is included. Distributed to the mobile phone 30. The music data and the metadata are recorded on the memory card 40 as one file. That is, each of the contents 1 to 4 shown in FIG. 4 includes music data and metadata.
[0042]
The memory card 40 has a data structure in which, when a reproduction number (No.) of the reproduction list 61 is designated from the controller 303 of the mobile phone 30, content (music data) corresponding to the number can be read. . That is, the memory card 40 records content (music data) in association with the number of the play list 61 and the content (music data).
[0043]
Referring to FIG. 4, with the music data for four songs recorded as shown in FIG. 3, the user of mobile phone 30 wishes to distribute music data for one song, and the communication unit of mobile phone 30 When 301 receives music data for one song from the distribution server 10, the controller 303 records the received music data on the memory card 40 via the bus BS 1 and the memory card interface 305. Then, the memory card 40 adds the music data newly received by the mobile phone 30 to the column of the reproduction number (No.) 5 of the reproduction list 61, and associates the reproduction number 5 with the newly received music data. Record. At the same time, the controller 303 updates and stores the reproduction number 5 of the newly received music data in the memory 307. In this case, since the reproduction number of the music data reproduced immediately before is stored in the memory 307, the memory 307 erases the already stored reproduction number and newly stores the reproduction number 5.
[0044]
Referring to FIG. 5, with the music data for five songs recorded on memory card 40 as shown in FIG. 4, the user of mobile phone 30 wishes to distribute music data for three songs, and the mobile phone When the 30 communication units 301 receive music data for three songs from the distribution server 10, the controller 303 records the received music data on the memory card 40 via the bus BS 1 and the memory card interface 305. Then, the memory card 40 adds the music data for the three songs newly received by the mobile phone 30 to the column 62 of the reproduction numbers 6 to 8 of the reproduction list 61, and each of the reproduction numbers 6 to 8 is stored in the contents. (Music data) Recorded in association with 6-8. Then, the controller 303 updates and stores in memory 307 the reproduction number 6 of the music data recorded most recently in the reproduction list among the reproduction numbers 6 to 8 of the music data for the three newly received songs. In this case, the memory 307 deletes the reproduction number already recorded and newly stores the reproduction number 6.
[0045]
As described above, when the mobile phone 30 receives a plurality of music data, the controller 303 stores, in the memory 307, the playback number added to the playback list 61 for the earliest playback among the newly received music data. Update and store. As a result, the user of the mobile phone 30 can reproduce the newly received music data in preference to the already recorded music data.
[0046]
With reference to FIG. 6, a flowchart will be described in which the mobile phone 30 newly receives music data and sets the received music data to be reproduced first. When a new music data distribution request is input via the key operation unit 302, the controller 303 controls the communication unit 301 to call the distribution server 10 and connect to the distribution server 10 (step S1). Then, the distribution server 10 transmits a music data menu to the mobile phone 30. Then, the controller 303 displays a menu of music data received by the communication unit 301 on the display 304.
[0047]
The user of the mobile phone 30 selects music data to be distributed from the music data menu displayed on the display 304. The controller 303 transmits the music data number selected by the user via the communication unit 301 to the distribution server 10 and selects the acquired content (music data) (step S2).
[0048]
Then, the distribution server 10 transmits the selected music data to the mobile phone 30, and the mobile phone 30 receives the music data. The controller 303 records the received music data on the memory card 40 via the memory card interface 305. Then, the memory card 40 adds the newly received music data to the reproduction list 61, and records the reproduction number of the newly received music data and the music data in association with each other (step S3).
[0049]
Then, the controller 303 determines whether or not the music data recorded on the memory card 40 is the music data received first (step S4). If it is not the first received music data, the process proceeds to step S6. When the music data is received first, the controller 303 updates and stores the reproduction number of the music data in the memory 307 (step S5).
[0050]
Then, the controller 303 determines whether or not to acquire other music data (step S6), and repeats the operations of steps S2 to S6 when acquiring other music data. When no other music data is acquired, the controller 303 controls the communication unit 301 to disconnect the connection with the distribution server 10 and the connection with the distribution server 10 is disconnected.
[0051]
As a result, a series of operations is completed.
When the user of the mobile phone 30 reproduces the music data recorded on the memory card 40, the user inputs a reproduction request via the key operation unit 302. Then, the controller 303 reads the reproduction number stored in the memory 307 in response to the reproduction request input from the key operation unit 302, and stores the music data corresponding to the read reproduction number via the memory card interface 305. Read from card 40.
[0052]
The controller 303 gives the read music data to the playback unit 306. The reproduction unit 306 reproduces the input music data and outputs it to the headphones 50 via the speaker 308 or the terminal 309.
[0053]
Thereby, reproduction can be started from the music data received by the mobile phone 30.
[0054]
According to Embodiment 1 of the present invention, the mobile phone stores the reproduction number of the music data newly received from the distribution server. When a reproduction request is input, the music corresponding to the stored reproduction number is stored. Since the reproduction is started from the data, the user of the mobile phone can listen to the newly received music data immediately without the trouble of searching for the newly received music data.
[0055]
[Embodiment 2]
The second embodiment will be described with reference to FIG. The mobile phone 30 may receive music data from the distribution server 10, access the mobile phone 31 in which the received music data is recorded on the recording medium 41, and receive desired music data from the mobile phone 31. In other words, the user of the mobile phone 30 exchanges music data with the user of the mobile phone 31 and starts playback from the received music data even when the desired music data is received from the other party. Is possible. In FIG. 2, the user of the mobile phone 31 can also play music data from the recording medium 41 by the mobile phone 31 and listen to music through the headphones 51.
[0056]
The mobile phone 30 receives new music data from the mobile phone 31 according to the flowchart shown in FIG. 6, and the controller 303 updates and stores the playback number of the received music data in the memory 307.
[0057]
When the mobile phone 30 receives music data from the mobile phone 31 and the user of the mobile phone 30 calls the mobile phone 31 and requests transmission of music data, the mobile phone 31 displays the playlist shown in FIG. A menu of music data having the same configuration as 61 is transmitted to the mobile phone 30. Then, the controller 303 of the mobile phone 30 displays the received music data menu on the display 304, and the user of the mobile phone 30 selects the music data desired to be received from the menu displayed on the display 304. Other operations are the same as those described in the first embodiment.
[0058]
According to the second embodiment of the present invention, even when music data is newly received from another mobile phone user, it is possible to listen to the newly received music data immediately without searching for the received music data. Can do.
[0059]
[Embodiment 3]
A third embodiment will be described with reference to FIG. The mobile phone 30 may newly receive music data distributed to the computer 140. A memory card 40 is detachable from the mobile phone 30 and is connected to a headphone 50 for playing music. The mobile phone 30 is connected to the computer 140 via the communication cable 145.
[0060]
The computer 140 includes a hard disk 141, a controller 142, and an external interface 143. The hard disk 141 is connected to the controller 142 via the bus BS2.
[0061]
The hard disk 141 stores music data distributed to the computer 140 by Internet distribution via the bus BS2. When there is a music data transmission request from the user of the mobile phone 30 via the communication cable 145 and the external interface 143, the controller 142 reads the music data from the hard disk 141 and outputs it to the outside via the external interface 143.
[0062]
The external interface 143 inputs a signal input from the mobile phone 30 to the computer 140 via the communication cable 145 to the controller 142 and outputs a signal from the controller 142 to the outside.
[0063]
Music data is distributed from the distribution server to the computer 140 by Internet distribution, and the music data is stored in the hard disk 141 of the computer 140 via the bus BS2.
[0064]
When the user operates the computer 140 to instruct to transmit music data, the controller 142 reads the instructed music data from the hard disk 141 via the bus BS2 and transmits it to the mobile phone 30 via the external interface 143.
[0065]
After the transmission, as described above, the user of the mobile phone 30 starts reproduction from the music data received last, not the order in which the music data was received. Then, the user listens to the music reproduced through the headphones 50 connected to the mobile phone 30.
[0066]
Further, the computer 140 does not have to receive music data and metadata of the music data by Internet distribution, and a CD-ROM drive (see FIG. The music data may be read from the CD-ROM and transmitted to the mobile phone 30. The music data recorded on the CD-ROM may be temporarily stored in the hard disk 141.
[0067]
Further, the computer 140 may generate music data by CD ripping. Ripping refers to converting music data acquired from a music CD so that it can be played back by a music playback module. First, a license is generated for the acquired music data. Next, the acquired music data is converted into content data that can be played back by the music playback unit, and then converted into a format that can be decrypted by the content key included in the generated license. Are managed so that they cannot be replicated. Therefore, CD ripping, which is a primary copy from a music CD, is a legal act that protects copyright by adopting a configuration in which a license cannot be copied.
[0068]
When a CD is used, the music data and license acquired from the music CD may be temporarily recorded on the hard disk 141 and then transmitted to the mobile phone 30.
[0069]
In the case of CD ripping, the computer 140 transmits only music data acquired from the music CD to the mobile phone 30. Therefore, the music data metadata is input by a person who performs ripping from a keyboard (not shown) of the computer 140. Then, the computer 140 transmits the input metadata to the memory card 40 via the external interface 143 and the communication cable 145.
[0070]
Thus, even when music data is received by CD ripping, the play list 61 can be created based on the metadata of the music data.
[0071]
Others are the same as those in the first embodiment.
[Embodiment 4]
The fourth embodiment will be described with reference to FIG. FIG. 9 shows a music data distribution system using a connection-type communication method.
[0072]
The distribution server 10 holds the music data, and transmits the music data to the terminal device 32 via the modem 11, the public line network 21, and the modem 33 in response to the distribution request of the music data from the terminal device 32.
[0073]
The modem 11 is disposed between the distribution server 10 and the public network 21. The modem 11 converts the music data output from the distribution server 10 into a signal format suitable for the public line network 21, and outputs the converted music data to the public line network 21. The modem 11 converts the signal received from the public line network 21 into a signal format suitable for the distribution server 10, and outputs the converted signal to the distribution server 10. For example, when the public line network 21 is a public telephone network, the modem 11 performs conversion from an analog signal to a digital signal or from a digital signal to an analog signal.
[0074]
The public line network 21 is a line network that performs connection-type communication, and transmits a signal from the modem 11 to the modem 33 and transmits a signal from the modem 33 to the modem 11. That is, the public line network 21 is a line network in which the modem 11 and the modem 33 are connected one-to-one and signals are exchanged between them. A specific example of such a public line network 21 is a public telephone network. In the present invention, “connection-type communication” refers to a method of performing communication by securing network resources necessary for communication in advance. That is, the communication is performed after securing the communication path in advance.
[0075]
Therefore, in FIG. 9, the public line network 21 secures a communication path for connecting the modem 11 and the modem 33 before performing communication between the distribution server 10 and the terminal device 32, and then transmits a signal between them. Exchange.
[0076]
The modem 33 is disposed between the public network 21 and the terminal device 32. The modem 33 converts the data output from the terminal device 32 into a signal format suitable for the public line network 21, and outputs the converted data to the public line network 21. The modem 33 converts the signal received from the public line network 21 into a signal format suitable for the terminal device 32, and outputs the converted signal to the terminal device 32.
[0077]
When the public line network 21 is a public telephone network, the modems 11 and 33 perform conversion from an analog signal to a digital signal, or conversion from a digital signal to an analog signal, respectively.
[0078]
The terminal device 32 records the music data received from the modem 33 on the memory card 40 attached in one file format.
[0079]
When the user of the terminal device 32 inputs a music data distribution request to the terminal device 32, the terminal device 32 outputs the input distribution request to the modem 33. The modem 33 converts the distribution request into a signal format suitable for the public line network 21 and outputs the distribution request to the public line network 21. Then, the public network 21 outputs the input distribution request to the modem 11, and the modem 11 converts the distribution request into a signal format suitable for the distribution server 10 and outputs it to the distribution server 10.
[0080]
When receiving the distribution request, the distribution server 10 determines whether to hold the requested music data. When the distribution server 10 does not hold the requested music data, the distribution server 10 transmits a message to that effect to the terminal device 32 via the modem 11, the public line network 21, and the modem 33, and rejects the distribution request. When the distribution server 21 holds the requested music data, the distribution server 21 transmits the music data to the terminal device 32 via the modem 11, the public line network 21, and the modem 33.
[0081]
The terminal device 32 has the same block diagram as the block diagram shown in FIG. When the terminal device 32 receives the music data, the controller 303 records the received music data on the memory card 40 via the memory card interface 305 and updates and stores the reproduction number of the music data in the memory 307.
[0082]
Then, as described above, the user of the terminal device 32 starts playback from the newly received music data. Then, the user listens to the music reproduced through the headphones 50 connected to the terminal device 32. Others are the same as in the first embodiment.
[0083]
The public line network may be a public digital line (ISDN).
[Embodiment 5]
A fifth embodiment will be described with reference to FIG. FIG. 10 shows a music data distribution system using a connectionless communication method.
[0084]
The distribution server 10 holds music data, and in response to a music data distribution request from the terminal device 32, the music data is transmitted to the terminal device via the cable modem 12, the cable television (CATV) network 22, and the cable modem 34. 32.
[0085]
The cable modem 12 is arranged between the distribution server 10 and the CATV network 22 and converts a signal on the CATV network 22 into a signal suitable for the distribution server 10 or adapts a signal from the distribution server 10 to the CATV network 22. Convert the signal to The cable modem 34 is disposed between the CATV network 22 and the terminal device 32, converts a signal on the CATV network 22 into a signal suitable for the terminal device 32, or adapts a signal from the terminal device 32 to the CATV network 22. Convert the signal to
[0086]
The CATV network 22 performs connectionless communication. The “connectionless type” is a method of performing communication without securing a communication path with a network prior to the start of communication. Therefore, when music data is transmitted from the distribution server 10 to the terminal device 32, the address of the terminal device 32 that is a communication partner is added to the head of the music data and transmitted to the CATV network 22. Then, the router in the CATV network 22 sends the data to the terminal device 32 which is the communication partner according to the address given to the head of the music data. The same applies when data is transmitted from the terminal device 32 to the distribution server 10.
[0087]
When the user designates a song number from a key operation unit (not shown) provided in the terminal device 32 and makes a distribution request, the terminal device 32 sends the song number to the CATV network 22 via the cable modem 34. . The distribution server 10 receives the song number from the terminal device 32 via the CATV network 22 and the cable modem 12. When receiving the song number, the distribution server 10 determines whether or not to hold the music data of the received song number, and when not holding the music data, the distribution server 10 notifies the cable modem 12, the CATV network 22, and the cable modem. 34 to the terminal device 32 to reject the distribution request.
[0088]
When the distribution server 10 holds the music data of the received song number, it transmits the music data to the terminal device 32 via the cable modem 12, the CATV network 22, and the cable modem 34.
[0089]
Then, the terminal device 32 records the received music data on the attached memory card 40.
[0090]
When requesting distribution of music data from the terminal device 32 to the distribution server 10, a plurality of terminal devices 32 and 32 can independently access the distribution server 10 via the CATV network 22 and the cable modem 12. That is, when data communication is performed between the distribution server 10 and the terminal device 32, the distribution server 10 or the terminal device 32 independently transmits data to the CATV network 22, and a router in the CATV network 22 performs communication. Send data to the other party. Therefore, in a distribution system using a connectionless communication method, data is transmitted and received without connecting a line between the distribution server 10 and the terminal device 32 as in a distribution system using a connection type communication method. Although it can be done, it is important that the data is not concentrated and the CATV network 22 is not congested.
[0091]
As a connectionless communication method, the Internet, LAN, wireless packet communication, etc. can be considered in addition to the CATV network 22. When these communication methods are used, data can be transmitted and received between the distribution server 10 and the terminal device 32 as in the case of using the CATV network 22.
[0092]
When wireless packet communication is used, music data for one song is not transmitted to the terminal device 32 at a time, but is divided into a plurality of packets and transmitted to the terminal device 32. In this case, a plurality of packets from the plurality of terminal devices 32 and 32 are transmitted as needed by a time division method or a frequency division method. Therefore, when music data for one song is transmitted from the distribution server 10 to the terminal device 32 by wireless packet communication, the terminal device 32 stores the music data for each predetermined unit transmitted in one packet.
[0093]
When the terminal device 32 receives the music data, the controller 303 records the received music data on the memory card 40 via the memory card interface 305 and updates and stores the reproduction number of the music data in the memory 307.
[0094]
Then, as described above, the user of the terminal device 32 starts playback from the newly received music data. Then, the user listens to the music reproduced through the headphones 50 connected to the terminal device 32. Others are the same as in the first embodiment.
[0095]
[Embodiment 6]
The encrypted music data may be distributed to the mobile phone 30 or the terminal device 32 using the distribution system shown in FIGS. In that case, the distribution server 10 holds the encrypted music data and a content key for decrypting the encrypted music data. The distribution server 10 distributes the encrypted music data and the content key to the mobile phone 30 or the terminal device 32 in response to a distribution request for the encrypted music data from the mobile phone 30 or the terminal device 32. When distributing encrypted music data or the like, the content key is encrypted and distributed.
[0096]
When the content key is encrypted and distributed, various encryption methods such as a public key encryption method are used. In the public key cryptosystem, the distribution server 10 holds a secret decryption key, distributes the public encryption key paired with the secret decryption key to the memory card 40, encrypts it with the public encryption key, and distributes the distribution server. 10 and the memory card 40 exchange data and the like. In this case, the public encryption key and the secret decryption key are generated so that the encrypted data encrypted with the public encryption key can be decrypted with the secret decryption key.
[0097]
The encrypted music data and the encrypted content key are recorded in the memory card 40 via the mobile phone 30 or the terminal device 32. As described above, the user of the mobile phone 30 or the terminal device 32 starts reproduction from the newly distributed encrypted music data. Then, the user listens to the music reproduced through the headphones 50 connected to the mobile phone 30 or the terminal device 32.
[0098]
When the mobile phone 30 or the terminal device 32 receives the encrypted music data and the content key for decrypting the encrypted music data from the distribution server 10, the playback unit 306 of the mobile phone 30 or the terminal device 32 11 includes a decoding circuit 3061 and a reproduction circuit 3062. The decryption circuit 3061 decrypts the encrypted music data input from the bus BS1 with the content key. Also, the playback circuit 3062 plays back the plaintext music data decrypted by the decryption circuit 3061 and outputs it to the speaker 308 or the terminal 309.
[0099]
In this case, the distribution server 10 holds the encrypted music data and the content key, and carries the selected encrypted music data and the content key in response to a distribution request from the mobile phone 30 or the terminal device 32. It transmits to the telephone 30 or a terminal device.
[0100]
The mobile phone 30 or the terminal device 32 receives the encrypted music data and the content key, and the controller 303 records the encrypted music data and the content key on the memory card 40 via the memory card interface 305. To do.
[0101]
In the memory card 40, as shown in FIG. 12, a reproduction list 61 of the received encrypted music data is created, and the number of the reproduction list 61 and the content are stored in association with each other. In this case, each of the contents 1 to 4 is stored as one file in which the content keys 1 to 4 and the encrypted music data 1 to 4 are associated with each other. When the reproduction number (No.) of the reproduction list 61 is input from the controller 303 to the memory card 40, the encrypted music data corresponding to the reproduction number and the content key are bused via the memory card interface 305. Output to BS1.
[0102]
Others are the same as those in the first embodiment.
In the present invention, when new music data is recorded on the memory card 40 and then removed from the mobile phone 30 or the terminal device 32, the memory 307 erases the stored reproduction number. Therefore, even if the memory card 40 is removed and then attached again, the memory 307 does not store the playback number of the music data received last, so the user of the mobile phone 30 or the terminal device has newly received it. Playback cannot be started from music data. Even if the memory card 40 is once removed from the mobile phone 30 or the terminal device and attached again, there is a possibility that new music data is recorded in the memory card 40 during that time, and which music data is recorded last. In the present invention, it is not assumed that the memory card 40 has been removed.
[0103]
In addition, the playback number, which is information for starting playback from newly received music data, is not limited to being stored in the memory 307 but may be stored in the memory card 40. That is, the memory card 40 may hold a memory (not shown) that holds a reproduction number of content data to be reproduced next.
[0104]
According to the present invention, a terminal device such as a mobile phone stores a playback number of newly received music data. When a playback request is input, playback is started from the music data corresponding to the stored playback number. Since it starts, the user of the mobile phone can start playback from the newly received music data without the trouble of searching for the newly received music data.
[0105]
The embodiment disclosed this time should be considered as illustrative in all points and not restrictive. The scope of the present invention is shown not by the above description of the embodiment but by the scope of claims for patent, and is intended to include all modifications within the meaning and scope equivalent to the scope of claims for patent.
[Brief description of the drawings]
FIG. 1 is a schematic diagram conceptually illustrating a content data distribution system using a mobile phone network according to Embodiment 1. FIG.
FIG. 2 is a block diagram of the mobile phone shown in FIG.
FIG. 3 is a diagram showing a data format of content recorded in the memory card shown in FIG. 1;
FIG. 4 is a diagram showing a data format of content recorded on a memory card when new music data is received.
FIG. 5 is a diagram showing a data format of content recorded on a memory card when music data of a plurality of songs is newly received.
FIG. 6 is a flowchart for starting playback from newly received music data.
FIG. 7 is a schematic diagram conceptually illustrating a content data distribution system using a mobile phone network according to a second embodiment.
FIG. 8 is a schematic diagram conceptually illustrating a content data distribution system using a computer according to a third embodiment.
FIG. 9 is a schematic diagram conceptually illustrating a distribution system that distributes content data by a connection-type communication method in a fourth embodiment.
FIG. 10 is a schematic diagram conceptually illustrating a distribution system that distributes content data using a connectionless communication method according to a fifth embodiment.
FIG. 11 is a block diagram of the playback unit shown in FIG. 2 when playing back encrypted music data.
FIG. 12 is a diagram showing a data format of content recorded on a memory card when encrypted music data is received.
[Explanation of symbols]
10 distribution server, 11, 33 modem, 12, 34 cable modem, 20 mobile phone network, 30, 31 mobile phone, 32 terminal device, 40, 41 memory card, 50, 51 headset, 61 playlist, 62 column, 140 Computer, 141 hard disk, 142, 303 controller, 143 external interface, 145 communication cable, 301 communication unit, 302 key operation unit, 304 display, 305 memory card interface, 306 playback unit, 307 memory, 308 speaker, 309 terminal.

Claims (6)

A recording unit for recording content data received from an external device;
An information holding unit for holding a reproduction number related to the reproduction order of the content data;
A playback unit for playing back the recorded content data based on a playback number related to the playback order;
A control unit that assigns a reproduction number to the received content data and controls the reproduction unit so that the content data corresponding to the reproduction number held in the information holding unit is reproduced next. ,
The control unit updates the reproduction number held in the information holding unit to the reproduction number of the last recorded content data so that the recorded content data is reproduced in order from the last recorded content data. A data terminal device for storing. When receiving the content data,
The control unit assigns and records a reproduction number to each of the plurality of received content data, and based on the assigned reproduction number , the reproduction number is the smallest among the plurality of received content data The data terminal device according to claim 1 , wherein a reproduction number relating to a reproduction order of the content data held in the information holding unit is updated and stored in the smallest reproduction number so that the content data is reproduced next. The recording unit includes a play list that associates content data with a play number,
The said control part reads the reproduction | regeneration number contained in the said reproduction | regeneration list | wrist , updates and memorize | stores the reproduction | regeneration number regarding the reproduction | regeneration order of the content data of the said information holding | maintenance part to the read reproduction | regeneration number . Data terminal device.   The data terminal device according to any one of claims 1 to 3, wherein the external device is another data terminal device.   The data terminal device according to any one of claims 1 to 3, wherein the external device is a distribution server that holds content data.   The data terminal apparatus according to claim 1, wherein the information holding unit is provided in the recording unit.

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