JP6254500B2 - Content distribution system, content distribution method, and content distribution program - Google Patents

Description

  The present invention relates to a content distribution system, a content distribution method, and a content distribution program for distributing content, and more particularly to a technique for replacing specific content such as an advertisement included in the distributed content.

  In general, a service that simultaneously distributes radio broadcasts using radio waves in the same time zone via an IP network such as the Internet is called IP simulcast radio. In IP simulcast radio, there is a need for a service that replaces and distributes specific content such as advertisements in a distribution center that relays and distributes a radio stream transferred from a broadcasting station. For example, when distributing to a region different from the region where the broadcasting station exists, the advertisement created initially cannot be distributed in the region of the distribution destination and needs to be replaced.

  When such content replacement is necessary, each content broadcast station (transmission facility) replaces the content in advance and forwards it to the distribution center. The distribution center relays and distributes the distribution content received from the broadcast station. It was common. For example, Patent Document 1 discloses a method for replacing a radio program in an automatic program control device in a broadcasting station.

Japanese Patent Laid-Open No. 06-112912

  Conventionally, for a radio stream transferred from a broadcasting station, advertisements or the like cannot be replaced in real time at a distribution center. Therefore, it is necessary to simultaneously transfer to the distribution center a stream that does not replace advertisements at each original broadcasting station and a stream that has been replaced with advertisements in advance. Operation costs such as the addition of broadcasting station equipment and the addition of transmission lines There was a problem that became larger.

  In view of the conventional technology described above, an object of the present invention is to provide a content distribution system, a content distribution method, and a content distribution program that can replace specific contents such as advertisements in a distribution center in real time.

In order to achieve the above object, the invention according to the first aspect is a content distribution system comprising: a receiving unit that receives distribution content; an information list storage unit that stores an information list of specific content; and the receiving unit. The received distribution content is monitored, the determination code of the distribution content being monitored is calculated, and the determination code of the distribution content being monitored is compared with the determination code in the information list to detect the specific content Alternatively, if the determination code of the distribution content being monitored corresponds to the determination code in the information list, the determination unit that detects the specific content and the distribution content received by the reception unit are determined. a buffer for temporarily storing, if the particular content by the determination unit is detected, replacement target And replacing an instruction unit for instructing the content replacement put in the designation information replacement instruction specifying the content, the replacement content storage section for storing the content for replacement, based on the designation information attached to replacement instruction by the replacement instruction section And a replacement unit that replaces the replacement target content in the buffer with the replacement content.
The invention according to the second aspect is the invention according to the first aspect, wherein the determination unit calculates a determination code of the distribution content being monitored by using the Fingerprint technology for the audio content included in the distribution content. The gist is to do.
The invention according to a third aspect is the invention according to the first or second aspect, wherein the receiving unit transfers the received distribution content to the buffer, and the received distribution content is synchronized with the determination unit. The gist is to forward the information.

The invention according to a fourth aspect is the invention according to any one of the first to third aspects, wherein the replacement instructing unit specifies a leading RTP packet constituting the replacement target content as the specification information. The gist is to use information that specifies information to be replaced and content replacement range.

The invention according to the fifth aspect is a content distribution method, wherein a reception step of receiving distribution content, an information list storage step of storing an information list of specific content, and monitoring of the distribution content received in the reception step And calculating the determination code of the distribution content being monitored, comparing the determination code of the distribution content being monitored and the determination code in the information list, and determining whether the specific content is detected or not detected, When the determination code of the distribution content being monitored corresponds to the determination code in the information list, a determination step of detecting the specific content, and a temporary storage for temporarily storing the distribution content received in the reception step in a buffer steps and, place to the specific content in the determining step has been detected , A replacement instruction step for instructing the content replacement put the instructions replacement designation information designating a replacement target content and replacement content storage step of storing the content for replacement, designated attached to replacement instructed by the replacement instruction step And a replacement step of replacing the replacement target content in the buffer with the replacement content based on the information.

The invention according to the sixth aspect is a content distribution program, characterized by causing a computer to function as the content distribution system according to any one of the first to fourth aspects .

  According to the present invention, it is possible to provide a content distribution system, a content distribution method, and a content distribution program that can replace specific contents such as advertisements in a distribution center in real time.

It is a system configuration figure of a contents distribution system in an embodiment of the invention. It is a functional block diagram of a distribution center in an embodiment of the present invention. It is a flowchart which shows operation | movement of the content delivery system in embodiment of this invention. It is a block diagram of the database in embodiment of this invention, (a) Information list DB, (b) Replacement content DB.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following embodiments exemplify a content distribution system for embodying the technical idea of the present invention, and the system configuration, data configuration, and the like are not limited to the following embodiments. .
(System configuration)
FIG. 1 is a system configuration diagram of a content distribution system in an embodiment of the present invention. This content distribution system is a system that realizes the distribution of IP simulcast radio that aggregates radio broadcast content from broadcast stations and distributes it to users via a distribution center.

  Specifically, as shown in FIG. 1, each broadcasting station 11, 12, 13,... (Hereinafter collectively referred to as “broadcasting station 10”) is connected to the distribution center 20 via a network 41, and The distribution center 20 is connected to the user's receiving terminal 30 via the network 42. The broadcast station 10 is an IP radio broadcaster. The distribution center 20 is an IP radio distribution company. The user receiving terminal 30 is a communication terminal such as a tablet 31, a smartphone 32, or a PC 33 in which an IP radio receiving application is installed.

  The distribution content includes specific content such as advertisements as well as broadcast content such as programs. When distributing to an area different from the area where the broadcast station 10 is present, there is a high need for replacing the initially created advertisement with an advertisement suitable for the distribution destination area. Therefore, the distribution center 20 buffers the distribution content and monitors the content of the distribution content. Thereby, when specific contents such as advertisements are detected, the contents in the buffer are replaced with designated contents.

  FIG. 2 is a functional block diagram of the distribution center 20 in the embodiment of the present invention. As shown in this figure, the distribution center 20 includes a broadcast data reception unit 21, an encoder 22, a distribution server 23, a detection unit 24, a replacement unit 25, a buffer B, an information list DB 24C, and replacement content. DB25C. The detection unit 24 includes a determination unit 24A and a replacement instruction unit 24B. The replacement unit 25 includes an instruction execution unit 25A and an instruction reception unit 25B. Here, attention is paid to a function group for detecting and replacing content, but it is needless to say that other function groups may be provided.

  The broadcast data receiving unit 21 receives distribution content from the broadcast station 10. Here, since IP radio distribution is assumed, the distribution content is digital audio broadcast data.

  The information list DB 24C is a database that stores an information list of specific contents. The specific content is content that needs to be replaced and delivered, such as an advertisement.

  The determination unit 24 </ b> A is a processing unit that constitutes the detection unit 24. The determination unit 24A determines whether or not the specific content is included in the distribution content received by the broadcast data reception unit 21, based on the information list stored in the information list DB 24C.

  The buffer B of the encoder 22 temporarily stores the distribution content received by the broadcast data receiving unit 21. This buffer B is also used for content replacement.

  The encoder 22 encodes broadcast data for IP radio distribution in the buffer B, and sends the encoded IP radio data to the distribution server 23.

  The distribution server 23 temporarily stores the IP radio data from the broadcast station 10 and distributes the IP radio data to the receiving terminal 30 of the user who has the request. Here, a configuration in which the distribution server 23 is accommodated in the distribution center 20 is illustrated, but a distributed configuration in which the distribution server 23 is accommodated in another data center may be adopted.

  The replacement instruction unit 24 </ b> B is a processing unit that constitutes the detection unit 24. When the determination unit 24A determines (detects) that the specific content is included, the replacement instruction unit 24B instructs the content replacement with designation information that specifies the detected replacement target content. As this designation information, information (time stamp, sequence number, and ssrc) that designates the first RTP (Real-time Transport Protocol) packet that constitutes the content to be replaced, and information (period) that designates the content replacement range Can be used. The time stamp, sequence number, and ssrc are information included in the RTP packet, and are defined in RFC 3550 issued by IETF (Internet Engineering Task Force). ssrc is used as an identifier indicating the identity of a series of sequence numbers.

  Although it has been shown that the information specifying the RTP packet at the beginning of the content and the information (period) specifying the replacement range are used as the specification information, for example, the information specifying the RTP packet at the beginning of the content and the end You may mount using the information which designates a tail RTP packet. It is desirable to use a time stamp, a sequence number, and ssrc as information specifying the last RTP packet.

  The replacement content DB 25C is a database that stores replacement content. The replacement content is various contents prepared in advance such as BGM.

  The instruction receiving unit 25 </ b> B is a processing unit that constitutes the replacement unit 25. When receiving the replacement instruction from the replacement instruction unit 24B, the instruction receiving unit 25B sends the replacement instruction to the instruction execution unit 25A.

The instruction execution unit 25 </ b> A is a processing unit that constitutes the replacement unit 25. The instruction execution unit 25A replaces the replacement target content in the buffer B with the replacement content based on the replacement instruction from the instruction receiving unit 25B. Since the replacement instruction includes designation information, it is possible to specify the replacement target content from the contents in the buffer B based on the designation information.
(Operation)
FIG. 3 is a flowchart showing the operation of the content distribution system in the embodiment of the present invention. Here, the operation when the distribution content arrives at the distribution center 20 from the broadcasting station 10 and the replacement process is performed in the distribution center 20 will be described.

  First, when receiving broadcast data from the broadcast station 10, the broadcast data receiving unit 21 transfers the received broadcast data to the buffer B of the encoder 22. At the same time, the received broadcast data is broadcasted to the detection unit 24 for monitoring (S1). Such broadcast transfer is performed by, for example, IP multicast.

  Next, the detection unit 24 determines whether the specific content is detected / not detected in the broadcast data from the broadcast data receiving unit 21 (S2). Specifically, the determination unit 24A in the detection unit 24 calculates the determination code of the distribution content being monitored and compares it with the determination code of the information list stored in the information list DB 24C to detect / not detect the specific content. Determine detection. For this determination, for example, the Fingerprint technology that is detected by a speech waveform or the like can be used.

  As a result, when the specific content is not detected (NO in S2), the content in the buffer B is distributed to the receiving terminal 30 of the user via the distribution server 23.

  On the other hand, when the specific content is detected (YES in S2), the detection unit 24 instructs the replacement unit 25 to replace the content (S3). Specifically, the replacement instruction unit 24B in the detection unit 24 includes information (time stamp, sequence number, ssrc) and content included in the RTP packet at the head of the sound that constitutes the replacement target content detected by the determination unit 24A. The information (period) for specifying the replacement range is acquired and used as the specification information, and the replacement instruction is sent to the replacement unit 25 with this specification information.

  Thus, when the instruction receiving unit 25B in the replacement unit 25 receives the replacement instruction from the replacement instruction unit 24B, the instruction receiving unit 25B sends the replacement instruction to the instruction execution unit 25A (S4). The instruction execution unit 25A replaces the replacement target content in the buffer B with the replacement content in the replacement content DB 25C based on the replacement instruction from the instruction receiving unit 25B (S5).

  The replacement instruction includes information (time stamp, sequence number, ssrc) specifying the leading RTP packet and information (period) specifying the content replacement range. ssrc is used as an identifier indicating the identity of a series of sequence numbers. According to such designation information, it is possible to accurately identify the replacement target content from the content in the buffer B.

When the content in the buffer B is replaced in this way, the content in the buffer B is distributed to the user receiving terminal 30 via the distribution server 23. As a result, when the distribution content is reproduced on the user's receiving terminal 30, the BGM is viewed instead of the advertisement.
(Data structure)
FIG. 4 is a configuration diagram of a database according to the embodiment of the present invention. Specifically, (a) shows the information list DB 24C, and (b) shows the replacement content DB 25C.

  As shown in FIG. 4A, the information list DB 24C is an information list for detecting specific content, and manages “content name”, “determination code”, and “other: additional information” in association with each other. ing. “Content name” is the name of the specific content. The “determination code” is a code that can be distinguished from specific content by calculation or the like, and specifically, is a determination code used in Fingerprint. As a determination code used in Fingerprint, a set of numerical values such as a time series and a vector value is used. In “others: additional information”, various additional information such as the ID of the replacement content can be described. According to such replacement content DB 25C, for example, when it is detected that the determination code of the content being monitored corresponds to the code C, the content C can be detected as the specific content.

  As shown in FIG. 4B, the replacement content DB 25C is a database for storing replacement content, and manages “content ID” and “content data” in association with each other. “Content ID” is the ID of the replacement content. “Content data” is replacement content data. According to such a replacement content DB 25C, it is possible to select a replacement content by specifying a content ID.

  As described above, the ID of the replacement content may be described in the “other: additional information” column of the information list DB 24C. In this case, it is also possible to refer to the replacement content DB 25C based on the content ID described in the column of “others: additional information” and select different replacement content for each replacement target content.

  As described above, according to the embodiment of the present invention, it is possible to replace specific contents such as advertisements in the distribution center 20 in real time.

  That is, the content distribution system according to the embodiment of the present invention is based on the broadcast data receiving unit 21 that receives distribution content, the information list DB 24C that stores an information list of specific content, and the information list that is stored in the information list DB 24C. A determination unit 24A for determining whether or not the distribution content received by the broadcast data receiving unit 21 includes a specific content; a buffer B for temporarily storing the distribution content received by the broadcast data receiving unit 21; When it is determined that the specific content is included by the unit 24A, a replacement instruction unit 24B for instructing content replacement with designation information specifying the replacement target content, a replacement content DB 25C for storing replacement content, and a replacement instruction Specified information instructed by the unit 24B Based on, and a replacing unit 25 for replacing the content for replacement of the replacement target content in the buffer B. As a result, an efficient service can be realized in which the distribution center 20 automatically replaces and distributes specific content such as advertisements. For broadcasters, there is no need to individually replace specific contents such as advertisements at the broadcast station 10, and there is an effect that operational operations are made more efficient.

  Further, the replacement instruction unit 24B uses information (time stamp, sequence number, and ssrc) that specifies the first RTP packet that constitutes the content to be replaced and information (period) that specifies the replacement range of the content as the specification information. May be. According to such designation information, it is possible to accurately identify the replacement target content from the content in the buffer B.

  Here, IP radio distribution is illustrated, but the content to be distributed is not limited to audio content, and video content including audio content can also be targeted. That is, even when video content is distributed, the detection unit 24 can determine whether the content is specific content based on audio content included in the video content.

  In addition, the present invention can be realized not only as a content distribution system but also as a content distribution method using characteristic processing units included in the content distribution system as steps, or by causing a computer to execute these steps. It can also be realized as a distribution program. It goes without saying that such a program can be distributed via a recording medium such as a CD-ROM or a transmission medium such as the Internet.

10 ... Broadcasting station 21 ... Broadcast data receiver (receiver)
DESCRIPTION OF SYMBOLS 22 ... Encoder 23 ... Distribution server 24A ... Determination part 24B ... Replacement instruction | indication part 24C ... Information list DB (information list storage part)
25 ... Replacement unit 25A ... Instruction execution unit 25B ... Instruction reception unit 25C ... Replacement content DB (replacement content storage unit)
30 ... User's receiving terminal B ... Buffer

Claims (6)

A receiving unit for receiving the distribution content;
An information list storage unit for storing an information list of specific content;
Monitoring the distribution content received by the receiving unit, calculating a determination code of the distribution content being monitored, comparing the determination code of the distribution content being monitored and the determination code in the information list, A determination unit for detecting whether or not the specific content is detected, and when the determination code of the distribution content being monitored corresponds to the determination code in the information list ;
A buffer for temporarily storing distribution content received by the receiving unit;
When the specific content is detected by the determination unit, a replacement instruction unit for instructing content replacement by adding designation information specifying the replacement target content to the replacement instruction;
A replacement content storage unit for storing replacement content;
A content distribution system comprising: a replacement unit configured to replace the replacement target content in the buffer with the replacement content based on designation information attached to the replacement instruction by the replacement instruction unit.   The content distribution system according to claim 1, wherein the determination unit calculates a determination code of the distribution content being monitored by using a Fingerprint technology for the audio content included in the distribution content.   3. The content distribution system according to claim 1, wherein the receiving unit transfers the received distribution content to the buffer and broadcast-transfers the received distribution content to the determination unit. The replacement instruction unit uses, as the specification information, information specifying a leading RTP packet that constitutes the replacement target content and information specifying a content replacement range . The content distribution system according to item 1 . A receiving step for receiving the distribution content;
An information list accumulation step for accumulating an information list of specific content;
The distribution content received in the receiving step is monitored, the determination code of the distribution content being monitored is calculated, the determination code of the distribution content being monitored is compared with the determination code in the information list, Determining whether to detect or not detecting the specific content, and when the determination code of the distribution content being monitored corresponds to the determination code in the information list ;
A temporary accumulation step of temporarily accumulating the distribution content received in the reception step in a buffer;
When the specific content is detected in the determination step, a replacement instruction step of instructing content replacement by adding designation information specifying the replacement target content to the replacement instruction;
Replacement content storage step for storing replacement content;
A content distribution method comprising: a replacement step of replacing the replacement target content in the buffer with the replacement content based on the designation information attached to the replacement instruction in the replacement instruction step. A content distribution program for causing a computer to function as the content distribution system according to claim 1 .

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