JP3847372B2 - Data distribution system and broadcast receiving apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a data distribution system using multiplexed broadcasting technology and a broadcast receiving apparatus used therefor.
[0002]
[Prior art]
In recent years, so-called character multiplex broadcasting, in which a character broadcast channel is set separately from the original audio broadcast channel and character broadcast is performed in synchronization with the audio broadcast, such as FM multiplex broadcast, has been performed. When receiving such multiplex broadcasts, a display device for text broadcasting is provided on the receiver side such as a radio. For example, in addition to displaying news and traffic information in text, music programs, etc. In this case, a wide range of services are provided, such as providing character information related to a program such as the title of a song to be broadcast and the name of a singer.
[0003]
[Problems to be solved by the invention]
However, in the conventional FM multiplex broadcasting, etc., the use of text information has been stopped, and it has not been able to meet a wider range of needs (that is, image information, audio information, etc. are not provided). ) In addition, there is no support for charging for the provided information (text information in the conventional multiplex broadcasting).
[0004]
The present invention has been made to solve the above-described problems, and provides a data distribution system and a broadcast receiving apparatus capable of providing a wide range of information and charging for the provided information. The purpose is to do.
[0005]
[Means for Solving the Problems]
For this reason, the data distribution system according to claim 1 is: Includes ID data Transmission means that scrambles distribution data and multiplexes and transmits the broadcast data, and key data for releasing the scramble applied to the distribution data And distribution data in response to retransmission requests from broadcast receivers The first communication means capable of transmitting the message and the distribution data ID data for identifying Can be bidirectionally communicated with the broadcasting device having the first storage means for storing the data, the receiving means for receiving the distribution data transmitted by the transmitting means, and the key data can be received. A second communication means, a release means for releasing the scrambled distribution data using the received key data, a second storage means for storing the distribution data after the release, and a first storage by the bidirectional communication. Memorized in the means ID data Is acquired by distribution information acquisition means for periodically acquiring and distribution information acquisition means ID data And delivery data stored in the second storage means ID data included in And receiving incomplete detection means for detecting incomplete received distribution data, and when incomplete received distribution data is detected, Second communication means Thus, the broadcast receiving apparatus includes a retransmission requesting unit that requests the broadcast apparatus to retransmit the distribution data.
[0006]
Here, the second communication means may be configured to acquire key data via a billing communication network. In this case, it is preferable to use a billing communication network in which a billing amount can be set for each key data.
[0007]
Further, the distribution data is, for example, music data, and the broadcast receiving apparatus may further include a performance execution means for executing a music performance based on the distribution data after cancellation.
[0008]
Further, the distribution data includes entity data that has been scrambled and is executed by the performance execution means, and ID data that is not scrambled and that identifies the entity data. It may be a thing.
[0009]
Further, the broadcast receiving apparatus further includes a reading unit that reads ID data from the received distribution data, and the read ID data can be transmitted to the broadcasting apparatus by the second communication unit. The broadcasting device can transmit the key data corresponding to the received ID data by the first communication means in response to the received ID data. The broadcast receiving device Sent by sending means Delivery data By receiving means It may further include reception setting means for setting whether or not to receive.
[0010]
Moreover, according to the broadcast receiver of claim 7, The distribution data includes ID data for identifying the distribution data, Receiving means for receiving a multiplexed broadcast that is broadcast from an external device and includes scrambled distribution data, and for canceling the scramble applied to the distribution data by bidirectional communication with the external device Key data and distribution data ID data for identifying Communication means capable of receiving the data, cancellation means for releasing the scramble of the distribution data received by the reception means using the key data received by the communication means, storage means for storing the distribution data after the release, and communication means Received regularly ID data And distribution data stored in the storage means ID data included in And receiving incomplete detection means for detecting incomplete received distribution data, and when incomplete received distribution data is detected, Communication means And a retransmission request means for requesting the broadcast apparatus to retransmit the distribution data.
[0011]
DETAILED DESCRIPTION OF THE INVENTION
A communication karaoke system will be described with reference to the drawings as an embodiment of an information distribution system of the present invention.
[0012]
FIG. 1 is a block diagram showing a schematic configuration of the communication karaoke system of the present embodiment. The communication karaoke system shown in FIG. 1 is a minimum configuration example, and includes one host device 11 and one karaoke terminal 1 as an “information providing device”. Actually, there may be a plurality of each of the devices 1 and 11, and a plurality of karaoke terminals 1 generally exist for one host device 11.
[0013]
In this system, song data as “distributed data” is distributed from the host device 11 to each karaoke terminal 1 at any time using FM multiplex broadcasting, and stored and stored in the karaoke terminal 1 to newly register song data. At the same time, the karaoke terminal 1 reads the corresponding song data and plays the song when requested by the user. The distribution of new song data from the host device 11 to the karaoke terminal 1 is executed every 2-3 days, for example.
[0014]
First, the karaoke terminal 1 will be described. As shown in FIG. 1, the karaoke terminal 1 receives a receiving device 8 for receiving FM broadcast waves in which distribution data broadcast from the host device 11 is multiplexed, and distribution data multiplexed from the received broadcast waves. A demodulator 6 that separates and demodulates, a memory 5 that temporarily stores demodulated distribution data, a storage device 7 that stores and stores distribution data, and a host device 11 that perform data communication The remote control light receiving unit 9 for receiving a request from the communication device 2, a remote controller (hereinafter abbreviated as “remote control”) 21 from the user, and the distribution data (music data) stored in the storage device 7 are converted into audio signals. And the reproduction device 3 to be output and the control for saving the distribution data from the memory 5 to the storage device 7 or the user's request from the remote control light receiving unit 9 and the corresponding song data. Central control as a control means for reading data from the storage device 7 and driving the playback device 3 to perform karaoke performance, or driving the communication device 2 to control data communication with the host device 11 And a control device 4. Furthermore, a display device 10 is also connected to the central control device 4. The display device 10 is a device for displaying a request song number input by the remote controller 21 and displaying a data ID described later.
[0015]
As will be described in detail later, in the karaoke system of the present embodiment, the distribution data broadcast from the host device 11 is scrambled (encrypted), and the distribution data is dealt with to release the scramble. Key data is required. The key data is downloaded from the host device 11 by the communication device 2 described above.
[0016]
The receiving device 8 and the demodulator 6 correspond to “receiving means”, the communication device 2 corresponds to “communication means”, and the central control device 4 corresponds to “release means” and “communication control means”. . The karaoke terminal 1 corresponds to “broadcast receiving means”, and the playback device 3 corresponds to “execution means”.
[0017]
Next, the host device 11 will be described. The host device 11 has a storage device 14 that stores music data, a modulation function that modulates music data to be distributed and multiplexes it into FM broadcast waves, and a broadcast function that broadcasts the multiplexed broadcast waves. A broadcasting device 15 as a “broadcasting means”, a communication device 12 for transmitting the key data using a communication line capable of bidirectional data transmission with the karaoke terminal 1, and the above-mentioned distribution A central control unit 13 as control means for performing various controls such as transmission control of power data and transmission / reception control of data with the karaoke terminal 1 by communication line connection. The distribution data is read from the storage device 14 and then scrambled before being modulated and multiplexed into an FM broadcast wave (details will be described later). The key data for releasing the scramble is transmitted from the communication device 12 to the karaoke terminal 1 through the communication line as described above. Here, the communication line is a line that can charge the caller.
[0018]
The communication line that charges the caller includes a communication network (for example, dial queue two) that employs a so-called metered charge system that charges according to the usage time of the line, There is a communication network (for example, videotex) that employs a system that charges an amount determined for each transmitted data regardless of the usage time. In this embodiment, since key data is set for each piece of music data distributed from the host device 11, the latter communication network that can determine the amount of money for each key data is provided. We are using.
[0019]
Next, the operation | movement which concerns on the data delivery of the host apparatus 11 in the communication karaoke system of this Embodiment is demonstrated with reference to FIG. These operations are processed by the central controller 13.
[0020]
First, in the first step S10, based on a predetermined music data distribution plan, pre-registered music data for distribution is read from the storage device 14. The song data for one song is composed of song number information (data ID) and entity information (actual data) which are identification information for identifying songs. The entity information (actual data) includes MIDI (Musical Instrument Digital Interface) performance information, which is information on accompaniment music, lyric information, timing information for specifying timings for switching lyrics and changing colors, and the like.
[0021]
Next, in S20, the following processing is performed on the read distribution data. First, the entity information (actual data) included in the song data read from the storage device 14 is scrambled to generate scrambled data. Scramble is performed using unique key data for each piece of music data. Note that the data ID for specifying the music data is not scrambled. As shown in FIG. 2, the head identifier 201 and the unscrambled data ID 202 are placed before the scrambled real data 203, and the end identifier 204 is placed after the scrambled real data 203. And check code 205 are added as attached data.
[0022]
The head identifier 201 and the end identifier 204 are fixed one-byte characters so that the karaoke terminal 1 can recognize the head and end of the data when receiving the distribution data. The data ID 202 is distribution data identification information for recognizing what data (song number, etc.) the karaoke terminal 1 has received. On the other hand, the check code 205 is a checksum of data from the head identifier 201 to the end identifier 204 (including the scrambled actual data). When the karaoke terminal 1 receives the distribution data, the karaoke terminal 1 receives the checksum. By calculating and comparing the calculated checksum with the check code 205 in the data, a defect in received data due to garbled data during communication is detected.
[0023]
Returning to FIG. 4, the distribution data including the scrambled entity data newly generated in this way is superimposed on the FM broadcast wave in S30 (multiplexing process) and broadcast by the broadcasting device 15. . In subsequent S40, the data ID of the distribution data (data broadcast by the broadcasting device 15) and the key data corresponding to the data ID are registered in the distribution information list in the format shown in FIG. 3 and updated and registered. The distribution information list is stored in the storage device 14. In this distribution information list, a data ID and key data are additionally registered every time distribution is performed thereafter.
[0024]
As described above, the FM broadcast wave in which the distribution data is multiplexed is broadcast from the host device 11, and this FM broadcast wave is received by the receiving device 8 of each karaoke terminal 1. Then, only the distribution data is demodulated / separated by the demodulator 6 and sequentially stored in the memory 5. In the following description, data demodulated and stored in the memory 5 as storage means is referred to as reception data.
[0025]
Next, processing performed by the central control device 4 on the data received by the karaoke device 1 and stored in the memory 5 will be described with reference to FIGS. 5 and 6.
[0026]
First, the reception data registration process shown in FIG. 5 executed by the central controller 4 will be described. This process is executed once a day according to a predetermined schedule, for example.
[0027]
In the first step S110, 1 byte is read from the received data stored in the memory 5. In next step S120, it is checked whether or not the read data is the head identifier 201 (see FIG. 2). If the 1 byte read in S110 is not the head identifier 201 (NO: S120), the process proceeds to S230. In S230, it is determined whether or not the processing of the data in the memory 5 has been completed (that is, whether or not there is still received data in the memory). If there is (NO: S230), the next received data in S110. Read 1 byte. In this way, the head of the distribution data is searched while repeating the processing of S110, S120, and S230. If the received data does not exist in S230, it is determined that the received data is finished (YES: S230), and this process is finished.
[0028]
On the other hand, if the determination in S120 is affirmative, that is, if the read data is the head identifier 201, the data is read one byte at a time until the end identifier 204 appears and the checksum integration is performed in S130 to S150. To do. If the end identifier 204 is reached (YES: S140), the process proceeds to S160, the check code 205 is read, and in S170, it is determined whether or not the received distribution data is appropriate. This determination is made by comparing the check code 205 stored after the end identifier 204 with the checksum calculated in S130.
[0029]
In S170, if both (check code 205 and checksum) are equal, it is determined that the reception has been completed normally and the received data is appropriate (YES: S170), and the process of the central controller 4 proceeds to S180. Transition. In S180, it is determined whether or not the data that is currently read is registered, that is, whether or not the data is descrambled and stored in the storage device 7. Here, whether to register data is displayed on the display device of the karaoke terminal 1 and the data ID is displayed, and whether to register by operating the operation buttons of the remote controller is input.
[0030]
If the data is not registered (NO: S180), the process proceeds to S230. When registering data, in S190, the data ID 202 is additionally registered in the received data ID list stored in the storage device 7. Subsequently, the central control device 4 is connected to the communication device 12 of the host device 11 via the communication line by the communication device 2, and acquires key data corresponding to the data ID 202 (see FIG. 2) in the distribution data. The key data acquisition process is executed (S200). The key data acquisition process will be described in detail later.
[0031]
When the key data is acquired by the key data acquisition process of S200, the scramble applied to the actual data 203 (see FIG. 2) in the distribution data is canceled using the acquired key data in S210. Then, after the descrambled data is stored in the storage device 7 in S220, the process proceeds to S230. The process of S230 is as described above and will not be repeated here.
[0032]
When the check code and the checksum are not equal, that is, when reception is not completed normally and it is determined that the received data is inappropriate (NO: S170), it is determined that the received distribution data is invalid. Thus, the process proceeds from S170 to S230 without performing registration, key data acquisition, descrambling of the actual data, and storing the release data in the storage device 7 (S180 to S210).
[0033]
In this way, the distribution data sent from the host device 11 is registered in the karaoke terminal 1 and is stored in the storage device 7 after being scrambled by the key data. Therefore, when there is a request from the user, the song data is read again from the storage device 7 and the playback device starts karaoke performance. Detailed processing of the karaoke performance is not the main point in the present invention, so the description is omitted here.
[0034]
Next, the key data acquisition process will be described with reference to FIG. The key data acquisition process is a process for receiving key data corresponding to the data ID 202 in the received data from the host device 11.
[0035]
First, in S310, the central control device 4 is connected to the communication device 12 of the host device 11 by the communication device 2 via a communication line. Next, the data ID of the received data is transmitted to the host device 11 (S320). When the host device 11 receives the data ID from the karaoke terminal 1, the host device 11 refers to the distribution information list (FIG. 3) stored in the storage device 14 and transmits key data corresponding to the data ID to the karaoke terminal 1. The karaoke terminal 1 receives the key data (S330), disconnects the line (S340), and ends the key data acquisition process.
[0036]
Here, the line used when the karaoke terminal 1 makes a call to the host apparatus 11 is a line that can be charged to the calling side in accordance with data sent from the host apparatus 11. . That is, the billing amount set corresponding to the data ID transmitted from the karaoke terminal 1 to the host device 11 in S340 is added to the telephone line usage fee of the user of the karaoke terminal 1. .
[0037]
On the other hand, when uploading predetermined data such as terminal operation information from the karaoke terminal 1 to the host device 11, on the other hand, when necessary as usual, the host device uses a communication line different from the above-mentioned billing communication line. 11 and upload.
[0038]
Now, in downloading music data using the FM broadcast wave described above, the host device 11 and the karaoke terminal 1 are unilaterally sent from the host device 11 without confirming the connection. When 1 is not activated or the reception state of the broadcast wave at the karaoke terminal 1 is bad, it is highly conceivable that downloading of necessary data fails. In addition, it cannot be determined which karaoke terminal 1 has generated them. Furthermore, even when the line for downloading the key data cannot be used for some reason, the data cannot be downloaded. Therefore, in the system according to the present embodiment, in such a case, in order to recover by connecting to the host apparatus 11 using the communication line and downloading the insufficient distribution data, the reception confirmation process described below is performed. Execute.
[0039]
FIG. 7 is a flowchart showing the reception confirmation process. First, in the first step S410, the central control device 4 of the karaoke terminal 1 controls the communication device 2 to connect to the host device 11 via a communication line. In subsequent S420, the host device 11 described above requests and downloads the distribution information list stored in the storage device 14.
[0040]
Then, in the subsequent processing after S430, the received information list held by the karaoke terminal 1 is collated, and download processing for distribution data that has not been received is performed. More specifically, first, one distribution data ID is extracted from the distribution information list in S430, and in subsequent S440, it is checked whether or not the data ID is registered in the reception information list. In S450, it is determined whether or not registration has been completed.
[0041]
At this time, if the data ID is not registered (NO: S450), it is determined that reception has failed and the process proceeds to S460. In S460, the host apparatus 11 is requested to distribute again the distribution data corresponding to the data ID that failed to be received, and the distributed data is downloaded in response to the request. Thereafter, the process proceeds to S470.
[0042]
On the other hand, if the distribution data ID extracted from the distribution information list in S430 is registered in the reception information list (YES: S450), the process proceeds to S470 without downloading because it is normally received. In S470, it is determined whether or not the end of the distribution information list has been reached. If it is not at the end (NO: S470), the process returns to S430, the next data is extracted, and the above processing is repeated. When the last data ID is reached (YES: S470), the process proceeds to S480, the connection with the host device 11 is disconnected, and the series of processing ends.
[0043]
This reception confirmation process is performed periodically by the central control device 4 at a predetermined cycle such as once a day or once a week, thereby eliminating individual differences in reception status at each karaoke terminal 1 in the system. To work. In this way, in the communication karaoke system according to the present embodiment, the song data to be distributed from the host device 11 is multiplexed and broadcast on the FM broadcast wave, so that the data can be distributed to many karaoke terminals 1 at the same time. In addition, since the distribution data is scrambled, the distribution data cannot be used unless key data is acquired. Therefore, an extremely efficient data distribution system can be configured.
[0044]
When the karaoke terminal 1 is not activated when broadcast from the host device 11 or the reception state of the broadcast wave by the receiving device 8 of the karaoke terminal 1 is bad, there may be a case where necessary music data cannot be received. However, in such a case, the distribution information list stored in the host device 11 and the received information list stored on the karaoke terminal 1 side are collated. Music data that has not been received from the terminal 1 side is now distributed again via a communication line capable of bidirectional data transmission. In this case, since the music data is received only at the karaoke terminal 1 connected by the communication line, the music data is transmitted without being scrambled.
[0045]
The present invention is not limited only to the embodiment described above, and can be modified and implemented in various modes without departing from the gist of the present invention. For example, in the above embodiment, every time each received data is read, the user inputs whether or not to store the data in the storage device 7. It may be configured to set the right or wrong of.
[0046]
In the above-described embodiment, the storage device 7 of the karaoke terminal is configured to store the scrambled entity data, but in order to release the scrambled data and the scramble. It is also possible to store the key data together in the storage device 7 and release the scramble during performance. Furthermore, if the data is compressed and an algorithm that requires the key data when decompressing the compressed data (that is, returning to the original data) is adopted, the compression of the data is directly scrambled. If the data is stored in the storage device 7 in a compressed state, the capacity of the storage device 7 can be used effectively.
[0047]
In the embodiment, an example is shown in which different key data is set for each received data. However, the same key data is used for a plurality of song data, for example, song data transmitted in one data distribution. The karaoke terminal side may receive the key data only once so that the scramble of all the data in the memory 5 can be released.
[0048]
Alternatively, the music data may be divided into groups so that the music data belonging to the same group can be scrambled with the same key data. As a grouping standard, for example, grouping by genre of music or singer can be performed. Further, when the same key data is used for the same group in this way, the karaoke terminal side stores the key data received once in the storage device, and stores it when the scramble is released. The configuration is such that the scramble is released with reference to the key data stored in the apparatus.
[0049]
In the above embodiment, the data distribution system of the present invention is described as an example of a communication karaoke system. However, the scope of the present invention is not limited to a karaoke system. The present invention can also be applied to a data distribution network.
[0050]
【The invention's effect】
According to the data distribution system of the first aspect, it is necessary to separately acquire key data for releasing the scramble because the distribution data is distributed by broadcasting in a state where the distribution data is scrambled. In spite of being able to do so, there is no fear that the distribution data is illegally used, so that an efficient data distribution system can be configured.
[0051]
According to the second aspect of the present invention, the key data can be charged, and the system can be easily obtained for the user.
[0052]
According to the third aspect, the data distribution system of the present invention can be applied to the karaoke system.
[0053]
According to the third aspect of the present invention, music data that should be avoided from being used illegally can be distributed by broadcasting.
[0054]
According to the fourth aspect, it is possible to determine whether or not to scramble the data based on the identification information included in the distributed data.
[0055]
According to the fourth aspect of the present invention, since only the entity data is scrambled, the identification information of the distributed data can be acquired without performing a special data operation.
[0056]
According to the fifth aspect of the present invention, it is possible to easily obtain key data for descrambling each piece of data even if scrambling that requires different key data for each piece of distribution data is performed.
[0057]
According to the broadcast receiving device of the seventh aspect, it is possible to receive the data distributed by the broadcast in a scrambled state and to obtain the key data for releasing the scramble. The scramble can be released well.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a schematic configuration of a communication karaoke system according to an embodiment.
FIG. 2 is a diagram illustrating a configuration of scramble data.
FIG. 3 is a diagram showing a configuration of a distribution information list.
FIG. 4 is a flowchart showing a data distribution operation of the host device in the communication karaoke system.
FIG. 5 is a flowchart showing received data registration processing.
FIG. 6 is a flowchart showing key data acquisition processing.
FIG. 7 is a flowchart showing reception confirmation processing;
[Explanation of symbols]
11 Host device
1 Karaoke terminal
2 Communication device
3 Playback device
4 Central controller
5 memory
6 Demodulator
7 Storage device
8 Receiver
9 Remote control sensor
10 Display device
12 Communication device
13 Central controller
14 Storage device
15 Broadcasting equipment

Claims (7)

Transmission means for scrambled distribution data including ID data and multiplexed with broadcast data for transmission;
First communication means capable of transmitting key data for releasing scramble applied to the distribution data and distribution data corresponding to a retransmission request from a broadcast receiving device ;
First storage means for storing ID data for identifying the distribution data;
A broadcasting device having
Receiving means for receiving distribution data transmitted by the transmitting means;
A second communication means capable of bidirectional communication with the first communication means and capable of receiving the key data;
A release means for releasing the scramble of the delivery data using the received key data;
Second storage means for storing the distribution data after release;
Distribution information acquisition means for periodically acquiring ID data stored in the first storage means by the bidirectional communication;
A reception incomplete detection means for comparing the ID data acquired by the distribution information acquisition means and the ID data included in the distribution data stored in the second storage means to detect incomplete reception data;
A retransmission requesting unit for requesting the broadcast device to retransmit the distribution data by the second communication unit when the incomplete reception data is detected by the reception incomplete detection unit;
A data receiving system comprising: a broadcast receiving device having   The data distribution system according to claim 1, wherein the second communication unit acquires key data via a charging communication network. The distribution data is music data,
The data distribution system according to claim 1, wherein the broadcast receiving apparatus further includes performance execution means for performing a musical performance based on the distribution data after cancellation. Data distribution system according to claim 3 in the ID data included in the distribution data to be transmitted, said scrambling be not facilities, characterized by the transmission means. The broadcast receiving device further includes a reading unit that reads the ID data from the received distribution data, and transmits the read ID data to the broadcasting device by the second communication unit,
5. The data distribution system according to claim 4, wherein the broadcasting device transmits key data corresponding to the received ID data by the first communication unit in response to the received ID data. 6. The broadcast receiving apparatus according to claim 1, further comprising reception setting means for setting whether or not the distribution data transmitted by the transmitting means is received by the receiving means. The data distribution system described. The distribution data includes ID data for identifying the distribution data,
A broadcast from the external device, receiving means for receiving the multiplexed broadcasting including the distribution data scrambled,
Communication means capable of receiving key data for releasing the scramble applied to the distribution data and ID data for identifying the distribution data by bidirectional communication with the external device;
A release means for releasing the scramble of the distribution data using the key data received by the communication means;
Storage means for storing distribution data after cancellation;
A reception incomplete detection means for comparing the ID data periodically received by the communication means and the ID data included in the distribution data stored in the storage means to detect incomplete reception data;
A broadcast receiving apparatus, comprising: a retransmission request unit that requests the broadcast apparatus to retransmit the distribution data by the communication unit when unreceived distribution data is detected.

Images