KR100359890B1 - Multimedia data transmission method and system with the feature of stable bandwidth based on method of separating, accommodating protocols - Google Patents

Abstract

The present invention relates to a method and system for transmitting multimedia data with stable bandwidth by a separate accommodation method. The method determines whether or not the multimedia stream is determined by determining whether data input from the outside of the network is an external request. And transmits the data to different signal processing apparatuses, and after the data is processed in each apparatus, is provided to a system bus so that the data can be displayed through a user's main memory, thereby enabling multimedia data processing hardware and a network. Redundant bus usage problems are improved when the device is integrated with I / O expansion hardware, improving system performance, thereby optimizing the use of the system bus between the two systems.

Description

Multimedia data transmission method and system with stable bandwidth by separating accommodation method {Multimedia data transmission method and system with the feature of stable bandwidth based on method of separating, accommodating protocols}

The present invention relates to a method and system for transmitting multimedia data with stable bandwidth by a separate accommodating method, and more particularly, by separating and accommodating multiple protocols residing in a server into a plurality of network interface cards. A stable bandwidth multimedia data transmission method using a separation receiving method for implementing a multimedia data transmission system having a stable bandwidth to a user and a multimedia stream separation receiving system for separating and accommodating multiple protocols into a plurality of network interface cards. It's about that system.

In the existing Unix server or Windows NT server, different protocol services coexisted, which resulted in unstable frame and transmission bandwidth data when requesting transmission of high bandwidth data such as video file and audio file of client. This phenomenon is caused by a network configuration method in which ordinary servers reside various protocols such as HTTPD, TCP / IP, NETBEUI, and IPX / SPX, and provide transmission bandwidth to a client's service request.

For the separation and acceptance of the conventional multimedia, the characteristics of the multimedia data stream and the configuration of related hardware and devices for controlling the same are understood through the multimedia data stream playback system.

According to FIG. 1, data input through an AV input device such as a camera or a microphone is compressed through each codec 1, and the processor 2 is compressed through a multimedia playback system 3 After processing the multimedia data such as synchronization or mixing, it is stored in the storage device 2 such as a hard disk for use in other applications or when playing on the output device of a monitor or speaker, or the network device 4 May be transmitted to other multimedia playback systems.

From the receiver's point of view, the multimedia data stream received through the network is stored in a storage medium or restored in real time to be played on an output device. The main CPU handles all processes of performing data transmission / reception with other systems through the network device 4 and controlling the flow of applications, business processes and multimedia data streams related to network protocols, and synchronization processing of video, sound, and images. In the computer system, all data including multimedia data is transferred to the main memory through the network, and the relevant instructions and data are processed in the main CPU.

In view of such a process, there is a drawback in that the multimedia processing system requires a relatively large amount of processor power to process a multimedia data stream. In other words, when the multimedia system attempts to exchange data between input and output devices, the multimedia data, like general data, must pass through the CPU, so additional bus cycles occur, which causes an additional load on the internal bus.

Such a flow for the network can be identified through FIG. 2, wherein the inbound flow of the multimedia data stream sent from the external communication network to the corresponding multimedia processor is transmitted from the outside to the network device 5, the system bus 6, the main memory device ( The flow is provided to output devices such as the CPU 7, the system bus 6, the multimedia playback system 8, the auxiliary storage device 9, and the monitor 10. In contrast, the multimedia stream (Outbound) sent to the outside from the multimedia processor is made in the reverse order of the above path, the flow is shown in FIG.

2 and 3 show that the CPU 7 finally processes the multimedia data stream. In both types, the use of two redundant system buses 6 has been carried out for the transmission of the multimedia data stream.

The load on the bus is increased by the number of times the system bus is used, and the processing speed of the related service such as the CPU and the requested service is slowed down due to operations related to service requests, device selection, and data input / output in order to use the bus. Becomes

Whenever multimedia data processing-related work is performed as described above, there is a reduction in work efficiency due to processing routines and waste of system resources, which causes the overall performance of the system to decrease.

Summary of the Invention An object of the present invention to solve the above-mentioned problems is to improve the performance of the system by improving the performance of the system by improving the redundant bus usage problem generated when the multimedia data processing hardware and the network device are integrated with the I / O expansion hardware The present invention provides a method and system for controlling multimedia data transmission with stable bandwidth by using a separate accommodation method for implementing a separate accommodation system for optimizing the use of a bus.

1 is a block diagram illustrating a playback system of a conventional multimedia data stream.

2 is a diagram illustrating a multimedia stream process when there is an external request.

3 is a diagram illustrating a multimedia stream process when there is an internal request.

4 and 5 are diagrams illustrating a detachable controller system of an embodiment according to the present invention.

6 is a functional block diagram of a controller for multimedia data separation according to the present invention.

7 is a view showing the actual setting value of the device assignment number in the server O / S after mounting a plurality of network boards to implement the separable acceptance controller of the present invention.

8A and 8B are result screens showing a result of performing a ping command on TCP / IP experimented with a network device according to an embodiment of the present invention and the present invention.

9A and 9B are diagrams illustrating an RTSP multimedia stream performing process according to the present invention and the embodiment of the present invention.

10 is a diagram illustrating an example of a multimedia data processing system composed of a plurality of multimedia processors and network devices.

※ Explanation of code about main part of drawing ※

1: Codec 2: Processor / Storage Device

3, 8, 26: Multimedia playback system

4, 5, 22, 24, 54, 56: network device

6, 30, 46: system bus 7, 32, 60: main memory

9: auxiliary storage device 10, 34: monitor

20: separate accommodation controller 28: main operation device

36: sequence controller 38: media discriminator

40: Hold status register 42: Bus controller

44: buffer memory 48, 50, 52: multimedia processor

58: Owner Handler

In accordance with an aspect of the present invention, there is provided a method for controlling transmission of multimedia data in a stable bandwidth according to the present invention, comprising: determining whether data input from the outside of a network is an multimedia stream by an external request; Transmitting the data to different signal processing apparatuses according to whether the multimedia stream is present; Providing data to the system bus after the data has been processed by each device after transmission; And displaying the data through the main memory of the user.

In this case, when the data is the multimedia stream, the stream may be transmitted to a multimedia playback system through a network device. When the data is not the multimedia stream, the stream may be transmitted to a main computing device.

In accordance with an aspect of the present invention, there is provided a method for controlling multimedia data transmission with a stable bandwidth, by providing a system signal through a main memory to a system bus through a main memory; Selectively supplying the data according to the type of the requested data; And supplying the separated data through different network devices.

The stable bandwidth multimedia data transmission control system according to the present invention for achieving the above object, by determining whether the data input from the outside of the network by the external request to the multimedia stream to provide to different network devices Separation controller; A multimedia playback system that receives the data from the separate accommodation controller and supplies the data to a system bus when the data is a multimedia stream; A main computing device which receives the data from the separate accommodation controller and supplies the data to a system bus when the data is not a multimedia stream; And a main memory device for storing the data supplied through the system bus.

The separation receiving controller may include a media discriminator for determining an attribute of data such as whether multimedia data is present; A hold status register indicating whether the data determined by the media discriminator is stored in a valid state; A bus controller for copying or exporting data on a system bus and providing the bus data driving means to the bus data driving means; A buffer memory for temporarily storing the data for copying or transmission preparation; And a sequence controller configured to control transitions and operations of the states of the bus controller, the media discriminator, and the hold status register according to operation cycles of the peripheral devices and the system bus.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIG. 4, when there is an external request (Inbound) of an internal user of a user, the separated accommodation control system according to the present invention first reads whether or not the requested data is a multimedia stream through the separation accommodation controller 20. FIG.

After reading, if it was a request for a multimedia stream via the dedicated network devices 22 and 24, respectively, the receiving controller transmits the stream to the multimedia playback system 26. If not, the main computing device (CPU, 28) to transmit data. After the transfer, the data processed in each device is sent on the system bus 30 and is serviced to the screen 34 through the user's main memory 32.

On the other hand, as shown in Figure 5, when the internal request of the external user (Outbound) sends a signal according to the request through the main memory device 32 through the system bus 30 to the separate accommodation controller 20, the multimedia stream of the request If there is a stream request, data is transmitted from the multimedia playback system 26 to the network device 22. In this case, the network device 22 reads the data in the same manner as the main computing device 28, and If the data is valid, the data is transmitted to the network device 22, otherwise the network device 24 is transmitted. Accordingly, data transmission between the multimedia playback system 26, the main computing device 28, and the network devices 22 and 24 is carried out through the system bus 30 without installing a separate data bus. 24) to be delivered directly.

In order to design and implement a separate accommodation controller, a resource design that reads whether the content requested by the user is a multimedia stream or not is required. An example thereof is illustrated in FIG. In order to support this function, the multimedia data stream includes a sequence controller 36, a media discriminator 38, a hold condition register 40, a bus controller 42, a buffer memory 44, and the like. Multimedia data separation hardware support block and control software for media and data status determination.

The bus controller 42 determines whether to copy or export data on the system bus 46 and transfers the data to the bus data driver, and the media discriminator 38 determines whether the media data of the processor is handled. The hold status register 40 indicates whether or not the data determined as the related media is kept in a valid state, and the buffer memory 44 is a temporary waiting place for providing data ready to be copied or transferred.

In addition, the sequence controller 36 transmits the state transitions and operations of the bus controller 42, the media discriminator 38, and the hold status register 40 to the operating cycles of the peripheral function blocks and the system bus 46. Control according to the standard.

For the functional block allocation and operation of the separate acceptance controller, the separated network device and value should be designated by adjusting the assigned number that separates and controls the protocol on the real server. The values and processes are as follows. .

In the embodiment of the present invention, two RTL8189 PCI Fast Ethernet Adapters of Realtec are used as the network device used to implement the detachable controller, and are operated at 100 Mbps of full duplex. .

When the network device is mounted, a network adapter is added to the device manager of the server O / S, and the existing network device and the added network adapter are set to separate protocols. That is, the existing network device accepts the internal protocol and the O / S-only protocol, and the added network adapter is configured with only TCP / IP, which is a multimedia protocol related to streaming multimedia data.

Figure 7 shows the actual setting value of the device allocation number in the server O / S after mounting a plurality of network boards to implement the separable acceptance controller of the present invention, and '2, 2' of the lined portion (A) Is the gateway protocol in block 2 of network device 2, and '2,8' in the part (B) shows the screen in which UDP (User Datagram Protocol) is allocated to block 8 of network device 2. . Since the real-time streaming signal is transmitted by using UDP, it is possible to improve service bottleneck and quality degradation due to unnecessary protocol traffic by assigning exclusively to network device 2.

Then, look at the result of performing the ping (Ping) command on the TCP / IP experiment with the network device of the embodiment of the present invention described above.

Figure 8a is a case of the case where the separation receiving system according to the present invention is not applied, it was found that the final reaction speed is 14 kW. By the way, it can be seen that the final reaction rate of 4 kPa was obtained in the experimental example to which the separation accommodation system of the present invention according to FIG. 8B was applied.

In addition, Fig. 9A is a measurement result showing the RTSP (Real-Time Streaming Protocol) multimedia stream performance processing obtained before the conventional separation accommodation system was installed, and the average transmission speed over 10 hours was 30.9 kbps. The measurement tool used was a statistical program built into RealPlayer 7.0+ from Real Network, which converged the RTSP protocol as a standard. On the contrary, as a result of the separation accommodation system according to the embodiment of the present invention, as shown in FIG. 9B, a transmission rate of 114.2 Kbps was obtained.

For this experiment, 10 clients of the same specification requested the same multimedia data in the media server. The internal network 100 Mbps and the external Internet dedicated line T3 (45 Mbps) were used, and the maximum bandwidth of the multimedia data was encoded at 150 Kbps. As a result, the media server adopting the separate acceptance method could cope with the client's request bandwidth. In addition, the performance improved as a proxy server or name server function based on TCP / IP services. Showed.

In addition, it will be demonstrated through FIG. 10 that the logical data processing speed by the network device of the present invention is improved. FIG. 10 illustrates an example of a multimedia data processing system including a plurality of multimedia processors and network devices including elements of a separate accommodation support function.

For example, a computer system capable of simultaneously processing a plurality of media including three multimedia processors 48, 50, 52, two network devices 54, 56, and a host processor 58 and a main memory 60 is an example. Holding To examine the effects of reducing the burden on the bus, the block diagram shows the differences in three aspects: reducing bus latency, halving bus usage, and gaining time by not using main memory.

Multimedia data of one times the number of system bus data bits is transferred from the network device 54 to the multimedia processor 48, from the network device 56 to the multimedia processor 50, and from the main memory 60 to the multimedia processor 52. In case of transmission, the conventional method and the method of the present invention are compared.

First, in the general processing method, the network devices 54 and 56 access the main memory 60 using the system bus 46 once each, and the main memory 60 uses the system bus 46 three times. Send data to the multimedia processor 48, 50, 52. In order to store data from the system bus 46 to the main memory 60, the internal operation period takes at least 2 bus cycles or more, so the time required for the completion of the total work takes 9 bus cycles.

In contrast, in the exemplary embodiment of the present invention, the network devices 54 and 56 each use the system bus 46 once, and the main memory 60 uses the system bus 46 once, so that a total of three bus cycles are required. The bus is used five to three times. However, as the total work completion time is 9 to 3, it can be seen that not only the bus burden is reduced but also the total processing time is reduced.

As described above, the multimedia data server having a stable bandwidth according to the segregation method implemented in the embodiment of the present invention has a low cost and high efficiency at a huge cost required when introducing or upgrading the server due to an increase in client usage in existing industries or institutions. It can be configured as a system, and it is advantageous to make the most of the expensive server by separating the network device equipment and the protocol setup in the server.

Therefore, according to the present invention, the redundant bus usage problem generated when the multimedia data processing hardware and the network device are integrated with the I / O expansion hardware is improved, thereby improving system performance, thereby optimizing the use of the system bus between the two systems. have.

In addition, it is possible to configure the enormous cost of introducing or upgrading the server into a low-cost, high-efficiency system, and to make the most of the expensive server by separating network device setup from adding network device equipment. It works.

Although the present invention has been described in detail only with respect to the described embodiments, it will be apparent to those skilled in the art that various modifications and variations are possible within the technical scope of the present invention, and such modifications and modifications are within the scope of the appended claims.

Claims (6)

Determining whether data input from the outside of the network by an external request is a multimedia stream; Transmitting the data to different signal processing apparatuses according to whether the multimedia stream is present; Providing data to the system bus after the data has been processed by each device after transmission; And Displaying the data through a main memory of a user; Stable bandwidth multimedia data transmission control method according to the separate receiving method characterized in that it comprises a. The method of claim 1, And if the data is the multimedia stream, transmitting the stream to a multimedia playback system through a network device. The method of claim 1, If the data is not the multimedia stream, the data is transmitted to the main computing device, characterized in that the stable bandwidth multimedia data transmission control method according to the receiving method. Providing a data signal by an internal request to a system bus through a main memory; Selectively supplying the data according to the type of the requested data; And Supplying the separated data through different network devices; Stable bandwidth multimedia data transmission control method according to the separate receiving method characterized in that it comprises a. A separate accommodating controller for determining whether data input from the outside of the network is a multimedia stream by an external request and providing the same to different network devices; A multimedia playback system that receives the data from the separate accommodation controller and supplies the data to a system bus when the data is a multimedia stream; A main computing device which receives the data from the separate accommodation controller and supplies the data to a system bus when the data is not a multimedia stream; And A main memory for storing the data supplied through the system bus; Stable bandwidth multimedia data transmission control system by a separate receiving method characterized in that it comprises a. The method of claim 5, The separation controller is, A media discriminator for determining attributes of data such as whether multimedia stream data is present; A hold status register indicating whether the data determined by the media discriminator is stored in a valid state; A bus controller for copying or exporting data on a system bus and providing the bus data driving means to the bus data driving means; A buffer memory for temporarily storing the data for copying or transmission preparation; And A sequence controller for controlling transitions and operations of states of the bus controller, media discriminator, and hold status registers according to operation cycles of peripheral devices and a system bus; Stable bandwidth multimedia data transmission control system according to the separation receiving method characterized in that it comprises a.