KR20030080350A - A system for verifying authorial products for data broadcast - Google Patents

Abstract

PURPOSE: A verifying system for contents for data broadcasting is provided to transmit a plurality of channels and data broadcasting contents via a single system, thereby establishing a single system without using expensive ASI type interface for verifying the broadcasting contents. CONSTITUTION: A verifying system for contents for data broadcasting includes a user interface processor(11), a channel manager producing/controlling unit(12), at least one or more channel managers(13,14), a null packet producer(15), a data buffer(16), a demultiplexer(17), and an ASI controller(18). The user interface processor receives commands on the transmission request of a user and transmits predetermined commands to variable component modules for carrying out the received commands. The channel manager producing/controlling unit produces or deletes channel managers according to adding or deleting commands from the user interface processor. The channel managers transmits data composing a channel respectively by a predetermined speed. The null packet producer generates null packets for complementing speed when the total output speed of the channel managers lacks. The demultiplexer reads TS packets from the data buffer, which stores the TS packets from the channel managers, and transmits the read TS packets to the ASI controller. The ASI controller transmits the system output to the outside via an ASI interface.

Description

Verification system for copyrighted data broadcasting {A SYSTEM FOR VERIFYING AUTHORIAL PRODUCTS FOR DATA BROADCAST}

The present invention relates to a verification system for data broadcasting works, and more particularly, to a system for pre-verification of data broadcasting works, which is one of additional services of digital broadcasting.

Digital broadcasting is a method in which a transmitting side compresses and multiplexes video information to MPEG2, and receives the received information to a set top box having an MPEG2 decoder. At this time, an appropriate modulation scheme such as quadrature phase shift keying (QPSK), quadrature amplitude modulation (QAM), orthogonal frequency division multiplexing (OFDM), and vestigial side band (VSB) is adopted according to the environment of the transmission path. These digital broadcasts have recently been in the spotlight because they can secure much more channels than conventional analog broadcasts, enable high quality and high quality broadcasts, and implement additional services such as home shopping, home banking, games, and data broadcasting.

Among them, data broadcasting refers to broadcasting that transmits information in the form of code or data, not voice and video broadcasting. Data broadcasting is a new media that has a characteristic of receiving digital signals on broadcast radio waves and transmitting them to automatically decode and process codes or data, and receive the results directly from the receiver or control other mechanical devices based on the information. It's a new field of broadcasting.

In such digital broadcasting, data is transmitted at a higher transmission rate than analog broadcasting, and a work for data broadcasting that provides a program-related or independent service to other areas except audio and video can be transmitted. This data broadcasting work is usually created by a data broadcasting authoring tool or directly by a programmer, and a verification step is performed to determine whether the correct work has been produced by checking the contents before sending it to each subscriber in actual broadcasting station. need.

Many kinds of expensive digital broadcasting equipments are required for the verification phase of data broadcasting works, and the verification work is performed through a complicated process by a digital broadcasting equipment expert who can operate these equipments.

That is, in the past, the data broadcasting verification system is composed of several systems, and the lower system constituting the entire system is an expensive asynchronous serial interface (ASI), which is a communication method for digital broadcast data transmission. The components are connected. In addition, in order to process a user's data broadcast transmission request operation, complicated operation control for several systems must be performed.

In order to improve this point, the present invention proposes a verification system for data broadcasting works composed of one system and a control method thereof, and in order to enable this, each component in implementing the verification system for data broadcasting in one system is provided. Inexpensive and efficient data transfer between them. This not only enables the data transfer function but also a method of delivering data while complying with the data rate of each channel essential for digital broadcasting. In addition, in order to easily process a user's data broadcast request, a method for implementing the user request in addition to the centralized user request is proposed.

The present invention has been made under the technical background as described above, and it is possible to simultaneously transmit a plurality of digital channels in one system, and to transmit data broadcasting contents associated with the channel when each channel is transmitted. In a broadcast system, multiple systems for verifying data broadcast works can be implemented in a single system without using expensive ASI interface, meet the data rate standards required for data broadcasting, and use a central user request processing method. The purpose is to provide a verification system for data broadcasting works.

1 is a diagram showing the overall configuration of a verification system for data broadcasting works according to the present invention.

FIG. 2 illustrates the channel manager of FIG. 1 in more detail. FIG.

3 is a diagram illustrating a processing flow in the channel manager of FIG.

4 is a view showing in more detail the remultiplexer of FIG.

FIG. 5 illustrates a process flow in the remultiplexer of FIG. 4. FIG.

FIG. 6 illustrates a processing flow in the user interface processor of FIG. 1. FIG.

(Explanation of symbols for the main parts of the drawing)

11: user interface handler 12: channel manager creation / controller

13, 14: channel manager 15: null packet generator

16: data buffer 17: remultiplexer

18: ASI controller

The verification system for data broadcasting works of the present invention for achieving the above object,

A user interface processor which receives a request for adding a channel, a request for deleting a channel, a request for starting transmission of a channel, or a request for stopping transmission of a channel, and transmits a predetermined command to a corresponding module;

A channel manager generator / controller that receives a request for adding a channel or a request for deleting a channel from the user interface processor to generate or delete a channel manager;

At least one channel manager for transmitting data forming a corresponding channel in the form of a transport stream (TS) packet, and controlling a transmission speed of a channel in charge;

A data buffer for storing TS packets transmitted from each channel manager;

A null packet generator for generating a null packet for compensating for a shortage when the transmission speed of each channel manager is smaller than a target transmission speed and outputting the null packet to the data buffer;

A multiplexer for mixing and outputting TS packets of each channel stored in the data buffer when a TS packet is sent; And

And transmitting an TS packet transmission request to the remultiplexer, and outputting a TS packet output from the remultiplexer to the outside of the system (ASI) controller. It is done.

The objects, technical configurations, and effects thereof of the present invention described above will become more apparent from the following description of the embodiments.

Hereinafter, with reference to the accompanying drawings will be described in detail a preferred embodiment of the present invention.

First, a verification system for a data broadcasting work according to an embodiment of the present invention will be described with reference to FIG. 1.

Figure 1 shows the overall configuration of a system for verifying the copyrighted work for data broadcasting according to the present invention.

As shown in FIG. 1, the system according to the present invention includes a user interface processor 11, a channel manager generator / controller 12, at least one channel manager 13 and 14, a null packet generator 15, and a data buffer. (16), a remultiplexer (17) and an ASI controller (18).

As shown, the system according to the present invention has a structure in which several configuration modules for verifying a work for data broadcasting are integrated in one system, and each configuration module performs its own unique role.

The user interface processor 11 receives a command related to a user's request for transmission and transmits a predetermined command to various configuration modules to execute the command. For example, a request for adding a new channel, requesting for deletion of a channel, requesting to start sending a channel, requesting to stop sending a channel, and the like correspond to this. Through the user interface processor 11, the centralized user transmission request command may be implemented. Existing systems could not have this structure because they consist of several separate modules.

The channel manager generation / controller 12 is responsible for creation and destruction of the channel manager according to a request for adding or deleting a channel from the user interface processor 11.

Each of the at least one channel manager 13 and 14 is responsible for transmitting data constituting one channel at a constant speed. The channel managers 13 and 14 do not use an ASI interface device, which is a conventional method, to transmit data at a constant rate, and use a software transmission rate control scheme to transmit a transport stream (TS). ')) To store the packet in the data buffer 16. Here, the TS means continuous data constituting audio / video and data contents of each channel in digital broadcasting.

The null packet generator 15 is a module for generating a null packet to compensate for the insufficient speed portion when the total output speed of the channel managers 13 and 14 currently being transmitted is smaller than the total output speed. to be. The TS packet output from the null packet generator 15 is transmitted to the data buffer 16 at a constant rate. Therefore, the data buffer 16 stores TS packets transmitted from at least one or more channel managers 13 and 14 and the null packet generator 15.

The remultiplexer 17 reads TS packets from the data buffer 16, which stores TS packets from several channel managers 13 and 14, in response to a send command from the ASI controller 18. It transmits the TS packet to the ASI controller 18 by sending it to the ASI controller 18.

The ASI controller 18 is responsible for delivering the result output of the system to the outside of the system through an ASI interface (not shown). The ASI controller 18 receives the output request from the ASI interface and delivers it to the remultiplexer 17 so that data can be delivered. The ASI controller 18 receives the TS packet actually sent from the remultiplexer 17 and receives the ASI. By sending to the interface, it performs the function of sending.

Next, the main components of the system according to the present invention will be described in more detail with reference to FIGS.

FIG. 2 shows the channel managers 13 and 14 shown in FIG. 1 in more detail, and FIG. 3 shows the processing flow in the channel managers 13 and 14.

The channel managers 13 and 14 transmit the data forming one channel to the data buffer 16 at a constant rate, thereby enabling transmission from the remultiplexer 17.

Existing systems use ASI card, which is hardware equipment, to deliver data forming channel to remultiplexer, and constant speed transmission function is also performed using ASI card. In the present invention, a channel manager is introduced to replace the channel manager, and the same function can be performed without using an expensive ASI card.

As shown in FIG. 2, the channel manager 13 includes a TS packet generator 131, a TS packet receiver 132, a TS packet sender 133, a transmission speed meter 134, and a transmission speed controller 135. do.

The TS packet generator 131 converts data forming a channel into a TS packet and transmits the data according to a request command of the TS packet receiver 132. The data forming the channel may be various kinds of data, and generally, a TS file storing digital broadcasting contents, encoding contents of a data broadcasting program to be verified in a set-top box, and program characteristics for transmitting broadcasting information. Information (PSI: program specific information, hereinafter referred to as 'PSI'), and an external ASI interface for receiving external ASI data. There is a module in the channel manager 13 that accepts this data, which is referred to as TS packet receiver 132.

The TS packet receiver 132 has a TS packet buffer (not shown) for storing TS packets received therein. The TS packet receiver 132 transmits a TS packet transmission command to the TS packet generator 131, stores the TS packet received from the TS packet generator 131 in a TS packet buffer, and transmits the TS packet. In this case, the TS packet is transmitted to the TS packet sender 133 so that the TS packet is transmitted from the channel manager 13 to the remultiplexer 17 via the data buffer 16.

The TS packet sender 133 transmits the TS packet stored in the TS packet buffer inside the TS packet receiver 132 to the data buffer 16 according to the control command of the transmission rate controller 135. To the remultiplexer 17.

The transmission speed controller 135 provides control information to a TS packet sender, and plays a role of notifying when the TS packet sender 133 transmits a TS packet through the control information. The dispensing speed controller 135 determines the dispensing timing by using the dispensing speed measuring instrument 134. The transmission rate measuring unit 134 calculates the elapsed time and the transmission amount each time the TS packet sender 133 transmits the TS packet, and calculates the transmission rate at what speed. The transmission speed controller 135 compares the transmission speed measured by the transmission speed measuring instrument 134 with a target transmission speed that the channel manager should transmit, and when the transmission speed is smaller than the target speed, the TS packet sender 133 Issues a control command to send the TS packet to the data buffer 16. If the calculated delivery speed is greater than the target delivery speed, a control command is sent to wait for a predetermined time. By controlling in this manner, the channel manager 13 sends TS packets to the data buffer 16 at a constant rate, and as a result, can pass data forming channels to the remultiplexer 17.

In addition, in the present invention, in order to transmit several channels at the same time, at least one or more channel managers are shown, in which case several channel managers transmit data at their own constant speed, so in the remultiplexer You can get input from multiple channels at a constant rate and mix the data from those channels.

The flowchart of FIG. 3 is for explaining the operation processed in any one of the channel managers 13.14.

When the operation is started (S31), the TS packet receiver 132 transmits a request for sending a TS packet to the TS packet generator 131 (S32). According to the TS packet transmission request command, the TS packet generator 131 transmits data forming a channel to the TS packet receiver 132 in the form of TS packets. It is determined whether there is a received TS packet by examining the TS packet buffer inside the TS packet receiver 132 (S33), and if there is no received TS packet, the TS packet generator 131 receives a TS packet ( S34). Next, the delivery speed controller 135 compares the current delivery speed and the target delivery speed, and determines whether the current delivery speed is greater than the target delivery speed (S35). If the current sending rate is smaller than the target sending rate in step S35, TS packets are sent from the TS packet sender 133 to the data buffer 16 (S36), and then the sending rate measuring instrument 134 The delivery speed up to now is measured by (S37). If the current sending speed is larger than the target sending speed in step S35, after waiting for a predetermined time (S38), it is determined whether the TS packet buffer inside the TS packet receiver 132 is in a full state ( S39). If the TS packet buffer is in the full state in step S39, the TS packet buffer is continuously waited for a predetermined time. Otherwise, the process jumps to step S32 to repeat the transmission process of the TS packet described above.

Next, the configuration and operation of the remultiplexer illustrated in FIG. 1 will be described with reference to FIGS. 4 and 5.

As described above, the remultiplexer 17 serves as a relay between the multiple channel managers 13 and 14 and the ASI controller 18 in the overall system configuration.

That is, the remultiplexer 17 performs a function of reading data from the data buffer 16 in which several channel managers 13 and 14 store data, and transmitting the data to the ASI controller 18 so that the data is actually transmitted. do.

As shown in FIG. 4, the remultiplexer 17 is composed of a TS packet reader 171, a TS packet writer 172, and an ASI output request processor 174. The TS packet reader 171 and the TS packet writer 172 are configured to receive a control command from the ASI output request processor 174.

The ASI output request processor 174 detects an output request signal from the ASI controller 18, and converts the signal into a control command for controlling each module of the TS packet reader 171 and the TS packet writer 172. In charge of delivering

When the ASI output request processor 174 receives the output request signal from the ASI controller 18, the TS packet reader 171 reads a command for reading TS packets stored by each channel manager from the data buffer 16. The TS packet writer 172 transmits a write command for transmitting the TS packet read by the TS packet reader 171 to the ASI controller 18.

In the present invention, the TS packet reader and TS packet writer are implemented using memory control on a general computer.

In this manner, the remultiplexer 17 performs a function of delivering the TS packets stored by the channel managers 13 and 14 to the ASI controller 18 to be actually output. This method is designed to be transmitted using a conventional computer memory in one system, whereas in the existing systems, a plurality of channel data was transferred to the remultiplexer through the ASI card. Also, by using this method, if there is data to be actually output in a very simple manner, the data constituting each channel can be mixed out at a suitable speed ratio. This method is made possible by using the channel managers 13 and 14 and the remultiplexer 17 to generate data for several channels and to bundle and process the data.

The operation of the remultiplexer 17 will be described in more detail using the flowchart shown in FIG. 5.

When the operation is started (S51), the ASI output request processor 174 determines whether there is an output request from the ASI controller 18 (S52). If there is no output request in step S52, the process jumps to step S52, and if there is an output request, it is determined whether there is a TS packet received in the TS packet reader 171 (S53). If there is a TS packet received in the step S53, a TS packet is read from the data buffer 16 to the TS packet reader 171 (S54), and the read TS packet is read through the write command. The TS packet is transferred from the TS packet writer to the ASI controller 18 (S55). Next, the ASI controller 18 outputs the transmitted TS packet to an external system through the ASI interface (S56). If there is no TS packet received in the TS packet reader 171 in step S53, a TS packet read command is transmitted to the TS packet reader 171 (S57). Next, control jumps to before step S53, and the operation described above is repeated.

Next, the operation of the user interface processor 11 illustrated in FIG. 1 will be described in more detail with reference to FIG. 6.

The user interface processor 11 receives a user's control command and transfers it to a command for controlling various modules constituting the system, thereby fulfilling a user's requirement. By providing the user interface processor 11 in this manner and centralizing all the control commands of the user in one place, it is easy to use the whole system, and the implementation of each module constituting the system is also easy. That is, a module which centrally processes a user's control command, in other words, has a user interface processor 11 of the present invention, and uses the same to simultaneously control a plurality of modules necessary for executing a user's control command. By using it, it is possible to develop a system having a user control method which is much more convenient than the existing system. In addition, each module may be implemented in a structure in which only the unique functions that each module has to be controlled without having various kinds of user control commands in mind.

As shown in FIG. 6, the user's control command is largely divided into a channel addition request (S610), a channel deletion request (S620), a channel transmission start request (S630), and a channel transmission stop request 640. do.

When a request for adding a channel (S610) is input through the user interface processor 11, a new channel manager generation request is transmitted to the channel manager generation / controller 12 (S611), and the generated channel managers 13 and 14 are connected to the channel manager generation / controller 12. The data buffers 16 are connected to each other (S612), and a transmission rate request is transmitted to the null packet generator 15 (S613). That is, when the request for the addition of the channel is requested, the newly created channel manager is connected to the data buffer to store the TS packet, thereby preparing to send a new channel.

When the deletion request of the channel (S620) is input through the user interface processor 11, the deletion request of the corresponding channel manager is transmitted to the channel manager generation / controller 12 (S621), and the null packet generator 15 is provided. A transmission speed adjustment request for changing the transmission speed of the null packet is transmitted (S622).

When the channel start transmission request (S630) is input through the user interface processor 11, a control command for instructing transmission start is transmitted to the corresponding channel managers 13 and 14 (S631). Then, the operation command request is transmitted when the operation of the re-multiplexer 17 is not performed (S632). Similarly, when the ASI controller 18 is not operated, the operation command request is transmitted (S633). When the null packet generator 15 is inoperative, an operation command request is transmitted (S634).

The channel transmission stop request S640 performs an operation opposite to that of the channel transmission start request S630. When a request for stopping channel transmission is input from the user interface processor 11, first, a transmission stop command is transmitted to the corresponding channel managers 13 and 14 (S641). If all channel managers are stopped and no further system output is required, an operation stop request is transmitted to the remultiplexer 17 (S642). In addition, when an operation stop is requested to the remultiplexer 17, an operation stop request is transmitted to the ASI controller 18 (S643). Similarly, when an operation stop is requested to the ASI controller 18. In operation S644, the operation stop request is also transmitted to the null packet generator 15. By doing this, the system no longer generates output.

As described above, in the verification system for data broadcasting works according to the present invention, a plurality of channels and data broadcasting contents can be transmitted through a single system, whereby a matching test and demonstration of data broadcasting contents using a single system can be performed. Can be used for In addition, it is possible to obtain a high advantage in terms of cost and convenience compared to using a conventional system. In addition, the conventional method required an operator with expertise in the field of digital broadcasting, but when using a single system, the necessity of such an expert is also eliminated.

Claims (6)

A user interface processor which receives a request for adding a channel, a request for deleting a channel, a request for starting transmission of a channel, or a request for stopping transmission of a channel, and transmits a predetermined command to a corresponding module; A channel manager generator / controller that receives a request for adding a channel or a request for deleting a channel from the user interface processor to generate or delete a channel manager; At least one channel manager for transmitting data forming a corresponding channel in the form of a transport stream (TS) packet, and controlling a transmission speed of a channel in charge; A data buffer for storing TS packets transmitted from each channel manager; A null packet generator for generating a null packet for compensating for a shortage when the transmission speed of each channel manager is smaller than a target transmission speed and outputting the null packet to the data buffer; A multiplexer for mixing and outputting TS packets of each channel stored in the data buffer when a TS packet is sent; And Data transmission for transmitting a TS packet transmission request to the remultiplexer, including an asynchronous serial interface (ASI) controller for outputting the TS packet output from the remultiplexer to the outside of the system Verification system for copyrighted works. The method of claim 1, The data forming the channel includes a TS file storing the contents of the digital broadcast, encoding contents of the data broadcast program to be verified in the set-top box, program characteristic information for transmitting broadcast information, and external ASI for receiving external ASI data. Validation system for a data broadcasting work, characterized in that it comprises an interface. The method of claim 1, Each of the at least one channel manager, A TS packet generator for converting data forming a corresponding channel into a TS packet and transmitting the TS packet according to a TS packet transmission request command; A TS packet receiver having a TS packet buffer therein, transmitting a TS packet send request command to the TS packet generator, and storing the TS packet transmitted from the TS packet generator in the TS packet buffer; A TS packet sender for transmitting a TS packet stored in a TS packet buffer inside the TS packet receiver to the data buffer according to transmission rate control information; A transmission speed measuring device for calculating an elapsed time and an amount of transmission each time the TS packet sender sends a TS packet; And, A transmission speed controller which transmits a control command to the TS packet sender by comparing the transmission speed of the TS packet calculated by the transmission speed measurer with a target transmission speed, and generates a control command for determining a transmission time of the TS packet sender; Validation system for a data broadcasting work comprising a. The method of claim 3, The delivery speed controller If the calculated sending rate is larger than the target sending rate, a control command for waiting the TS packet sender for a predetermined time is transmitted. If the calculated sending rate is lower than the target sending rate, the TS packet sender sends the data buffer. And a control command for transmitting a TS packet to the system. The method according to claim 1 or 3, The remultiplexer is An ASI output request processor for detecting an output request signal from the ASI controller and generating a read and write command of a TS packet from the signal; A TS packet reader for reading TS packets of each channel stored in the data buffer according to a read command of the ASI output request processor; And, And a TS packet writer for transmitting the TS packet read from the TS packet reader to the ASI controller according to a write command of the ASI output request processor. The method of claim 5, And the TS packet reader and TS packet writer are implemented using memory control on a general computer.