KR102210437B1 - Method and appratus for controlling media contents delivery - Google Patents

Abstract

The present invention has been proposed to solve the traffic problem in a communication network due to an increase in media content demand. In particular, a media content transmission control method capable of adjusting a frame rate of media content transmitted from a media content providing server to a terminal on a communication network, It is intended to provide an apparatus and system for this purpose. By transmitting media content according to the MMT standard, configuring an MFU for each frame, and inserting frame compression type information into the header of the MFU (Media Fragment Unit), media on a communication network By parsing the MMT packet of the content and selecting and removing the frame-by-frame MFU with reference to frame compression type information, it is possible to control traffic in the communication network.

Description

Media content transmission control method, apparatus for same {METHOD AND APPRATUS FOR CONTROLLING MEDIA CONTENTS DELIVERY}

The present invention relates to media content transmission, and more particularly, to a media content transmission control method capable of adjusting a frame rate of media content transmitted from a media content providing server to a terminal through a communication network, and an apparatus therefor.

The content described in this section merely provides background information on the present embodiment and does not constitute the prior art.

MPEG (Moving Picture Experts Group)-2 TS (Transport stream) is a communication protocol for transmitting multimedia-related data including audio, video, and data through a network. Terrestrial/satellite digital broadcasting, DMB (Digital Multimedia Broadcasting) , IPTV (Internet Protocol TV), or the like, is used for media data transmission, or recently used for media storage in digital video cameras or Blu-ray equipment.

However, as broadcasting networks and communication networks are gradually converged and advanced, and next-generation contents such as UHD (Ultra High Definition) video contents or 3D video contents emerge, new services such as N-screen service emerge, new and diverse requirements. This is happening.

Accordingly, as the first part of the MPEG-H (High Efficiency Coding and Media Delivery in Heterogeneous Environments) standard to provide various services such as digital broadcasting in various types of broadband communication networks, MPEG Media Transport (MMT: MEPG Media Transport) technology was developed. Has become.

The MMT technology aims to provide efficient multimedia data transmission and various methods of reproduction functions in various network environments that are being advanced, and largely, a media processing unit (MPU) function area, a signaling function area, a delivery function area, and It can be divided into an expression information area.

Meanwhile, as demand for various media services has recently occurred, there is a problem of traffic overload due to an increase in high-definition media content services and a rapid increase in demand when an event such as a sports event occurs.To solve this traffic overload problem, Depending on the situation, the amount of data transmission of media content must be properly controlled.

However, the current media content delivery technology allows the server to hold content with various image quality and transmit content data of appropriate image quality according to the content situation, with the aim of seamless content delivery. It is being considered, and there is no way for a third party, for example, a communication network operator, to control the transmission amount of media content according to traffic conditions on the communication network.

In particular, the MMT technology aims to provide efficient multimedia data transmission and playback functions of various methods, but a technology for controlling the transmission amount of media content according to traffic conditions from the standpoint of a communication network operator has not yet been proposed.

Korean Patent Publication No. 2014-0125274, published on October 28, 2014 (Name: Dynamic queue management method and apparatus in broadcasting system)

The present invention has been proposed to solve a traffic problem in a communication network due to an increase in media content demand. In particular, a media content transmission control method capable of adjusting a frame rate of media content transmitted from a media content providing server to a terminal on a communication network, and , To provide a device for this.

In particular, the present invention transmits media content according to the MMT standard, but constructs an MFU for each frame, and parses the MMT packet of the media content on a communication network communication network by inserting frame compression type information into the header of the MFU (Media Fragment Unit). Accordingly, an object of the present invention is to provide a media content transmission control method and apparatus for controlling traffic in a communication network by selectively removing the frame-by-frame MFU with reference to frame compression type information.

As a means of solving the above-described problems, the present invention includes the steps of: receiving, by a media content processing apparatus, an MMT packet transmitted from a media content providing server to a terminal through a communication network; Analyzing the MMT packet to extract an MFU; Extracting frame compression type information of the MFU from the header of the MFU; Selecting a data unit of specific frame compression type information among the MFUs included in the MMT packet at a ratio according to a preset frame rate; And removing the selected MFU and transmitting the MMT packet including the unselected MFU to the terminal.

Media content transmission control method according to an embodiment of the present invention, prior to the step of extracting the MFU, further comprising the step of analyzing the header of the MMT packet to determine whether the MMT packet is a frame rate adjustment target,

The step of extracting the MFU may be performed with respect to the MMT packet identified as a frame rate adjustment target.

In addition, the method for controlling media content transmission according to an embodiment of the present invention may further include transmitting an MMT packet that is not subject to frame rate adjustment as it is to the terminal as a result of the confirmation.

In addition, in the method for controlling transmission of media content according to an embodiment of the present invention, the determining whether the frame rate is to be adjusted may include: analyzing an MMT header of the MMT packet and checking a priority according to a packet type; And determining whether a frame rate is to be adjusted according to the priority; including or by analyzing an MMT payload header of the MMT packet, and determining whether the data type carried in the payload of the MMT packet is an MPU. ; If the data type is MPU, it may include determining that the frame rate is to be adjusted.

In addition, in the media content transmission control method according to an embodiment of the present invention, the receiving of the MMT packet includes, through a switching device connected between a specific base station and a core network, an MMT packet among packets transmitted to the base station. Redirecting to the content processing device may be included.

In addition, the method for controlling media content transmission according to an embodiment of the present invention may further include setting the frame rate according to the amount of traffic transmitted through a specific base station.

In the above-described process, the MFU included in the MMT packet is configured in units of frames, and the specific frame compression type information may be one of a P type and a B type type defined in the MPEG standard.

The media content transmission control method of the present invention described above may be executed through a processor after the program is implemented and recorded in a computer-readable recording medium.

In addition, the present invention provides a means for solving the above-described problem, comprising: an input/output interface module for receiving an MMT packet transmitted from a media content providing server to a terminal from a communication network and outputting the MMT packet to the communication network; An analysis module for analyzing the MMT packet to extract a Media Fragment Unit (MFU), and extracting frame compression type information of the MFU from the header of the MFU; And selecting a data unit of specific frame compression type information among the MFUs included in the MMT packet at a ratio according to a preset frame rate, removing the selected MFU, and MMT packet including the unselected MFU, the input/output interface module It provides a media content processing device including a control module for outputting through the communication network.

In the media content processing apparatus according to an embodiment of the present invention, the analysis module analyzes a header of an MMT packet and extracts priority information according to a packet type of the MMT packet, or an MMT payload header of the MMT packet By analyzing the MMT packet to further check the type of data carried in the payload of the MMT packet, and the control module determines whether the MMT packet is a frame rate adjustment target based on one or more of the priority and the data type, If the rate is not subject to adjustment, the MMT packet may be output to the communication network through the input/output interface module as it is.

In addition, in the media content processing apparatus according to an embodiment of the present invention, the control module may set the frame rate according to the amount of traffic of the communication network.

In addition, the present invention is a means of solving the above-described problem, by analyzing the MMT packet transmitted from the media content providing server to the terminal through the communication network to extract the MFU, and by checking the frame compression type information of the MFU from the header of the MFU And a media content processing device for selecting and removing an MFU of specific frame compression type information among MFUs included in the MMT packet at a ratio according to a preset frame rate; And a switching device connected between a specific base station and a core network and redirecting the MMT packet among packets transmitted through the base station to the media content processing device.

The media content transmission control system according to the present invention further includes a monitoring device for monitoring the amount of traffic transmitted through the base station, and the media content processing device may set the frame rate according to the amount of traffic.

The present invention is for adjusting a frame rate of media content transmitted through a communication network on the communication network, and transmitting the media content according to the MMT standard, but configuring a Media Fragment Unit (MFU) of an MMT packet for each frame, and the MFU By inserting the frame compression type information in the header of the communication network, the MMT packet of the media content is parsed on the communication network, and the MFU of each frame is selectively removed by referring to the frame compression type information, thereby enabling traffic control on the communication network. have.

In addition, according to the present invention, it is possible to adjust the frame rate of the media content through the analysis of the MMT packet on the communication network, thereby solving the traffic overload problem by adjusting the frame rate of the media content according to the traffic amount of the communication network.

1 is a block diagram schematically showing the configuration of a media content transmission control system according to an embodiment of the present invention.
2 is a diagram illustrating a media content transmission control process in a media content transmission control system according to an embodiment of the present invention.
3 is a block diagram showing a main configuration of a media content processing apparatus according to an embodiment of the present invention.
4 is a flowchart illustrating a method of controlling transmission of media content by a media content processing device according to an embodiment of the present invention.
5 is a diagram showing the structure of an MMT packet.
6 is a diagram showing a detailed structure of an MMT payload header of an MMT packet.
7 is a diagram schematically illustrating a frame rate adjustment process in a media content transmission control system according to an embodiment of the present invention.
8 is a diagram schematically illustrating media content whose frame rate is adjusted according to an embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, in the following description and the accompanying drawings, detailed descriptions of known functions or configurations that may obscure the subject matter of the present invention will be omitted. In addition, it should be noted that the same components are indicated by the same reference numerals as possible throughout the drawings.

The terms or words used in the present specification and claims described below should not be construed as being limited to a conventional or dictionary meaning, and the inventor is appropriate as a concept of terms for describing his own invention in the best way. It should be interpreted as a meaning and concept consistent with the technical idea of the present invention on the basis of the principle that it can be defined. Therefore, the embodiments described in the present specification and the configurations shown in the drawings are only the most preferred embodiments of the present invention, and do not represent all the technical ideas of the present invention, and thus various alternatives that can be substituted for them at the time of application It should be understood that there may be equivalents and variations.

In addition, terms including ordinal numbers such as first and second are used to describe various elements, and are only used for the purpose of distinguishing one element from other elements, and to limit the elements. Not used. For example, without departing from the scope of the present invention, a second component may be referred to as a first component, and similarly, a first component may be referred to as a second component.

In addition, when a component is referred to as being "connected" or "connected" to another component, it means that it is logically or physically connected or can be connected. In other words, it should be understood that a component may be directly connected or connected to another component, but another component may exist in the middle, or may be indirectly connected or connected.

In addition, terms used in the present specification are only used to describe specific embodiments, and are not intended to limit the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In addition, terms such as "comprises" or "have" described herein are intended to designate the presence of features, numbers, steps, actions, components, parts, or a combination thereof described in the specification. It is to be understood that the above other features, or the possibility of the presence or addition of numbers, steps, actions, components, parts, or combinations thereof, are not preliminarily excluded.

In addition, embodiments within the scope of the present invention include computer-readable media having or transferring computer-executable instructions or data structures stored in the computer-readable media. Such computer-readable media may be any available media accessible by a general purpose or special purpose computer system. By way of example, such computer readable media may be in the form of RAM, ROM, EPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, or computer executable instructions, computer readable instructions, or data structures. It may include, but is not limited to, physical storage media such as any other media that may be used to store or deliver certain program code means, and may be accessed by a general purpose or special purpose computer system. .

In addition, in the present invention, the media content is defined as a set of content components, and may be, for example, a movie or a song. The content component (or media component) is defined as a media of a single type or a subset of the media of a single type, for example For example, it may be a video track, movie subtitles, or an enhancement layer of video.

In the present invention, such media content may be configured and transmitted according to the MPEG Media Transport (MMT) standard. For reference, the MMT protocol (MMT Protocol: MMTP) defines an application layer protocol for delivering a delivery frame composed of an MMT payload format (PF) through an IP network. The MMT payload is designed to be efficiently delivered by being configured in an MMT payload format. In order to efficiently deliver MPEG media data through heterogeneous IP networks, MMT defines Encapsulation Formats, Delivery Protocols, and signaling message formats.

1 is a block diagram schematically showing the configuration of a media content transmission control system according to an embodiment of the present invention.

Referring to FIG. 1, a media content transmission control system 100 according to an embodiment of the present invention is provided on a communication network to which a plurality of terminals 10 and a media content providing server 50 are connected, and the It is implemented to adjust the frame rate of the media content by analyzing the data packet of the media content, in particular, the MMT packet transmitted from the media content providing server 50 to the terminal 10.

In the present invention, the communication network is defined as one or more data links that enable electronic data to be transmitted between computer systems and/or modules, and may be formed of a combination of one or more different communication networks, for example, 3G mobile communication network, 4G mobile communication network, WLAN (Wireless LAN), Wi-Fi, Wibro, Wimax, High Speed Downlink Packet Access (HSDPA), Ethernet, xDSL (ADSL, VDSL) ), HFC (Hybrid Fiber Coaxial Cable), FTTC (Fiber to The Curb), FTTH (Fiber To The Home), etc. may include wired/wireless communication networks.

In addition, the communication network, in the case of a mobile communication network, is a connection between the access network 20 to which a plurality of terminals 10 are connected, and between the plurality of access networks 20 and an external network (for example, between the Internet network 40). It may be made by including a core network 30 for.

At this time, the access network 20 is a network for performing wireless communication with the terminal 10, for example, a plurality of base stations 21 such as a base station (BS), a base transceiver station (BTS), NodeB, eNodeB, etc. ), and other than that, although not shown, a base station controller such as a base station controller (BSC) and a radio network controller (RNC) may be further included. At this time, the plurality of base stations 21 divide the digital signal processing unit and the wireless signal processing unit of each base station into a digital unit (hereinafter referred to as DU and a radio unit (hereinafter referred to as RU)). A plurality of RUs may be installed in each area, and a plurality of RUs may be configured by connecting them with a centralized DU.

The core network 30 serves to connect an access network and an external network, for example, an Internet network, and performs circuit switching or packet switching, and performs packet flow in the mobile network. Manage and control. In addition, the core network (not shown) manages the mobility between frequencies, and plays a role for interworking with traffic in the access network (not shown) and the core network (not shown) and other networks, such as the Internet network (not shown). May be. These core networks (not shown) further include Serving GateWay (SGW), PDN GateWay (PGW), Mobile Switching Center (MSC), Home Location Register (HLR), Mobile Mobility Entity (MME) and Home Subscriber Server (HSS). It may be configured to include.

The media transmission control system 100 according to the present invention, in particular, is provided between the access network 20, in particular the base station 21 and the core network 30, from the media content providing server 50 to the terminal ( 10) By analyzing the MMT packet of the media content transmitted to the media content, and selecting a frame of a specific frame compression type from the media content at a rate according to a preset frame rate, the frame rate of the media content is adjusted, through which the amount of traffic As configured to control, it may include a switching device 110, a monitoring device 120, and a media content processing device 130. Here, the monitoring device 120 does not necessarily need to be included, and may be replaced by receiving the monitored traffic amount from an external device.

At this time, the terminal 10 is a user's device capable of transmitting and receiving information to and from the live streaming providing server 70 through a communication network, that is, the access network 20, the core network 50, and the Internet network 60 according to the user's manipulation. Means. The terminal 10 may perform voice or data communication through the access network 20, the core network 50, and the Internet network 60. For this, the terminal 10 of the present invention may include a browser for transmitting and receiving information, a memory storing programs and protocols, and a microprocessor for calculating and controlling by executing various programs. In particular, the terminal 10 according to an embodiment of the present invention means a terminal 10 capable of receiving and processing an MMT packet transmitted from the media content providing server 50.

The terminal 10 according to an embodiment of the present invention may be implemented in various forms. For example, the terminal 10 described in this specification is a mobile terminal such as a smart phone, a tablet PC, a personal digital assistant (PDA), a portable multimedia player (PMP), an MP3 player, etc. , A fixed terminal such as a smart TV or a desktop computer may be used.

In addition, the media content providing server 50 may store media content, configure and transmit the media content in the form of an MMT packet according to the request of the terminal 10. In particular, in the present invention, the media content providing server 50 configures an MFU in units of frames in configuring an MMT packet, and can record and transmit frame compression type information of frame data recorded in each MFU in the MFU header. have.

For reference, briefly describing the structure of the MMT packet, consisting of a header of the MMT packet and an MMT payload, wherein the MMT payload includes at least one Media Fragment Unit (MFU) and at least one Media Processing Unit (MPU). ), it may be configured to include at least one of at least one asset and an MMT package. For example, in the case of streaming transmission, the data unit of the MMT payload may be an MFU or MPU, and in the case of file delivery, the data unit may be an MMT asset and an MMT package. In the present invention, media content may be transmitted in a streaming method. Accordingly, the MMT payload of the MMT packet of the media content may consist of at least one MPU or at least one MFU.

Here, the MFU is a container format including media data that is independent of any specific media codec and is coded to be independently processed by a media decoder, and the MFU is a part of fragmented data of the MPU, and the smallest unit that can be independently decoded is do. In the present invention, the MFU consists of one video frame.

The MPU is a container format including one or more MFUs and additional delivery and processing related information, and may include various numbers of MFUs generated from a plurality of different access units. MPU refers to an encoded media data unit that can be completely and independently processed by an MMT compliant entity, and a specific size according to the application environment (for example, in the case of video, 1 GOP (Grou of Picture).

An MMT asset is a data entity composed of one or more MPUs and is the largest data unit to which the same composition information and transport characteristics are applied. MMT assets contain only one type of packaged or multiplexed data (such as audio or video).

The MMT package is defined as a collection of encoded video data and related information processed by the MMT implementation entity. That is, one media content may be configured as one MMT package.

In the media content delivery control system 100 according to the present invention, the switching device 100 is configured as described above, and the media content transmitted from the media content providing server 50 with the terminal 10 as a destination The MMT packet is redirected to the media content processing device 130. In this case, the switching device 100 performs the redirection based on address information (source address, destination address, etc.) recorded in the IP header of the MMT packet, or packet type information or port information included in the IP header. The redirect may be performed. In particular, the switching device 100 is provided between the specific access network 20 (or base station 21) and the core network 30, among the packets transmitted to the specific access network 20 (or base station 21). The MMT packet may be redirected to the media content processing device 130.

In addition, the switching device 100 may mirror the packet transmitted to the specific access network 20 (or the base station 21) and transmit it to the monitoring device 200, and the monitoring device 200 refers to the mirrored packet. Thus, the traffic volume of the specific access network 20 (or base station 21) is monitored. The monitoring device 200 provides the monitored traffic amount to the media content processing device 130 in real time.

The media content processing device 130 is a device for adjusting a frame rate of media content according to the present invention, receiving the MMT packet redirected by the switching device 110, analyzing the header of the MMT packet, It is determined whether the MMT packet is a frame rate adjustment target, and if it is a frame rate adjustment target, the frame compression type information of each MFU included in the MMT packet is checked, and the MFU of the specific frame compression type information is selected and removed at a certain rate, The MMT packet including the MFU that has not been removed is output back to the communication network through the switching device 110. Accordingly, the MMT packet is transmitted to the original destination terminal 10 through the access network 20.

Hereinafter, a process of controlling media content transmission by the media content transmission control system configured as described above will be described with reference to FIG. 2.

2 is a diagram illustrating a media content transmission control process in a media content transmission control system according to an embodiment of the present invention.

In FIG. 2, the media content processing apparatus 130 sets the frame rate of the media content according to the traffic volume of the specific base station 21 (S105). In this case, the traffic volume of the specific base station 21 may be received from the monitoring device 120.

In the above state, the arbitrary terminal 10 may request streaming of a specific media content to the media content providing server 50 (S110). At this time, the request for streaming of the specific media content is sent to the media content providing server 50 through the base station 21, the core network 30, and the Internet network 40 of the access network 20 to which the terminal 10 is connected. Is transmitted.

Accordingly, the media content providing server 50 constructs an MMT packet for streaming transmission of the requested media content (S115) and transmits it to the communication network (S120).

At this time, the destination of the MMT packet is the terminal 10 requesting the media content, and the MMT packet is transmitted to the terminal 10 through the internet network 40, the core network 30, and the access network 20, the The switching device 110 connected between the base station 21 and the core network 30 redirects the MMT packet to the media content processing device 130 that is not the original destination (S125).

Accordingly, on the communication network, the media content processing device 130, which has received the MMT packet transmitted from the media content providing server 50 to the terminal 10, analyzes the header of the received MMT packet, The frame compression type information of one or more MFUs carried in the payload is checked (S130), and MFU of a specific frame compression type is selected at a ratio according to the preset frame rate (S135). Remove the selected MFU (S140). Then, the MMT packet including the MFU that has not been removed is transmitted to the original destination terminal 10 through the switching device 110 (S145).

By the above-described operation, the frame rate of the media content streamed from the media content providing server 50 is adjusted, whereby the traffic overload can be solved by adjusting the traffic amount of the communication network, in particular, a specific base station 21. do.

In the above-described process, the configuration and operation of the media content processing apparatus 130 will be described in more detail.

3 is a block diagram showing a main configuration of a media content processing apparatus according to an embodiment of the present invention.

Referring to FIG. 3, the media content processing apparatus 130 according to the present invention may include an input/output interface module 131, an analysis module 132, and a control module 133.

The input/output interface module 131 is configured to receive an MMT packet transmitted from the media content providing server 50 to the terminal 10 from a communication network and output the MMT packet back to the communication network. The input/output interface module 131 receives the MMT packet redirected by the switching device 110 connected between the base station 21 and the core network 30, and outputs the MMT packet to the switching device 110 again. Thus, it is transmitted to the original destination terminal 10 through the switching device 110.

The analysis module 132 is a component for analyzing a header of an MMT packet input through the input/output interface module 131. Here, the header of the MMT packet may include one or more of an MMT header, an MMT payload header, and an MFU header, and the analysis module 132 analyzes each header to determine a frame rate adjustment target or a removal target (MFU ) To extract information for selection. Specifically, the analysis module 132 extracts one or more of a packet priority, a data type carried in a packet, and frame compression type information.

The control module 133 determines a frame rate adjustment target and a removal target MFU for frame rate adjustment based on the information extracted from the analysis module 132, and determines the MFU of the MMT packet according to the frame rate. It is selectively removed at a rate, and the MMT packet including the unremoved MFU is transmitted to the communication network again through the input/output interface module 131. At this time, the control module 133 may receive the measured traffic amount of the base station 21 from the monitoring device 120 and set the frame rate according to the traffic amount. Specifically, the frame rate is set to be in inverse proportion to the amount of traffic.

The operation of the media content processing apparatus 130 configured as described above will be described with reference to the flowchart of FIG. 4.

4, the media content processing apparatus 130 according to the present invention includes a specific base station 21, more specifically, of the base station 21 to which the switching device 110 interworking with the media content processing apparatus 130 is connected. The traffic volume is checked, and the frame rate of the media content is set in inverse proportion to the traffic volume (S205). In this case, the frame rate may be set as information and number of frame compression types to be removed per 1 GOP.

Thereafter, the media content processing device 130 receives an MMT packet with the media content providing server 50 redirected through the switching device 110 as a starting point and the terminal 10 as a destination (S210). The MMT packet is composed of an MMT packet header and an MMT payload, and the MMT payload is again composed of an MMT payload header and payload data, and the payload data includes one or more MFUs. And, each of the one or more MFU includes an MFU header.

Accordingly, the media content processing apparatus 130 analyzes the MMT packet having this structure, determines whether the MMT packet is a frame rate adjustment target, and, if the frame rate adjustment target, selects an MFU to be removed.

To this end, the media content processing apparatus 130 may analyze an MMT header to determine whether the MMT packet is a frame rate adjustment target.

The MMT header is a header assigned to an MMT packet, and as shown in FIG. 5, a packet ID for identifying a packet (packet_id), a packet sequence number (packet_sequence_number), a timestamp, and a type of packet (TP) , May include various information such as a flow label (Flow_label). Here, TP is information for defining a packet type, and in the present invention, priority information set in a packet is recorded in the TP. The priority can be arbitrarily set for each type of media content, and a high priority is given to media content whose image quality is important, and a lower priority is given to media content that is not significantly affected by the image quality, or media content with a lot of movement. A high priority can be given to a low priority for media content with little movement.

Accordingly, the media content processing apparatus 130 analyzes the MMT header and extracts the priority of the MMT packet from the TP information (S215), and compares the extracted priority with a threshold A for determining a frame rate adjustment target. It is checked whether the frame rate is to be adjusted (S220). Here, the threshold value A may be set to any of the priorities recorded in the TP. For example, when priorities from 0 to 7 are defined in the TP, the threshold A is set to 5, and if the priority is greater than the threshold value 5, it is determined that the frame rate is not subject to adjustment, and the priority is critical. If the value is less than 5, it can be determined as a frame rate adjustment target.

In addition, the media content processing apparatus 130 may determine whether the MMT packet is a frame rate adjustment target by analyzing the MMT payload header. For reference, the MMT payload header is header information recorded in the payload field of the MMT packet, and the MMT payload is the length of the payload data and the payload as shown in FIG. Information related to the type of recorded data, fragmentation, and aggregation can be provided. Here, the data type may include an MPU and a signaling message. Here, as described above, the MPU refers to media data consisting of one or more MFUs, and when the data type is MPU, the frame rate is to be adjusted, but the signaling message is not the frame rate is to be adjusted.

Accordingly, the media content processing apparatus 130 according to the present invention analyzes the MMT payload header, extracts data type information of the payload data (S225), and determines whether the corresponding MMT packet is a frame rate adjustment target according to the data type. It is determined (S230). For reference, when the data type of the payload data is an MPU, the MMT packet is determined as a frame rate adjustment target, and when the data type is a signaling message, it is determined that the frame rate adjustment target is not.

As a result of the above-described determination, when it is determined that the MMT packet is a frame rate adjustment target, the media content processing apparatus 130 analyzes the header of each MFU included in the payload of the MMT packet, and extracts frame compression type information ( S235).

Then, the MFU to be removed is selected at a predetermined ratio according to a preset frame rate (S240). For reference, the media content according to the present invention constitutes an MFU in units of frames. In the media content, each frame is compressed into one of an I type, a B type, and a P type. For reference, an I-type frame is an intraframe, and can be compressed or reconstructed irrespective of other frames, and has the lowest compression rate among I, P, and B. The P-type frame refers to a predicted frame, and is a frame in which only the difference value is encoded by calculating only a part with a difference compared to the previous frame. The B-type frame is a bi-directional frame and can be compressed by referring to the next frame as well as calculated from the previous frame. For example, the B type frame has a difference value between the previous I or P type frame and the I or P frame after the B frame. For reference, a set of consecutive pictures starting with an I frame is referred to as a group of picture (GOP).

In the present invention, the media content processing apparatus 130 arbitrarily selects and removes B-type and P-type frames, excluding I-type frames, which are absolutely necessary during encoding, to adjust the frame rate without significant deterioration in image quality.

Accordingly, in step S240, the media content processing apparatus 130 may select an MFU to be removed from among B-type and P-type MFUs at a predetermined ratio according to a frame rate.

Then, the media content processing device 130 removes the selected MFU (S245), and transmits the MMT packet including the unremoved MFU back to the communication network through the switching device 110, so that the original destination terminal 10 ) To be transmitted (S250).

7 is a diagram schematically illustrating a process of adjusting a frame rate of media content by a media content transmission control system according to an embodiment of the present invention. For reference, in the example of FIG. 7, it is assumed that the MPU recorded in the payload data of the MMT packet is composed of media data in units of 1 GOP and composed of a plurality of MFUs constituting 1 GOP. In addition, it is assumed that 1GOP has an MPEG-2 sequence of I-P-B-P.

Referring to FIG. 7, the streaming providing server 50 packetizes the requested media content into MMT packets (P1, P2, P3, P4, ...) in units of 1 GOP and sequentially transmits them. At this time, each MMT packet (P1, P2, P3, P4, ...) includes four MFUs each consisting of I-P-B-P type frame data.

The frame rate of the MMT packet transmitted as described above is adjusted by the media content processing device 130 according to the traffic volume of the base station 21. When the traffic volume of the base station 21 is less than the threshold value, the media content processing device ( 130) transmits the corresponding MMT packet to the base station 21 as it is, and the base station 21 transmits the frame rate transmitted from the media content providing server 50 to the terminal 10 as it is.

On the other hand, when the amount of traffic of the base station 21 is less than the threshold value, the media content processing apparatus 130 may selectively remove one of the P-type MFUs from the MFUs of the MMT packet.

In this case, the MMT packet transmitted to the terminal 10 through the base station 21 includes three MFUs of three frame compression types I-B-P. Accordingly, the frame rate of the MMT packet transmitted to the terminal 10 is reduced, and accordingly, the amount of traffic to be transmitted by the base station 21 can be reduced.

8 is a graph showing a frame rate adjustment state of media content according to embodiments of the present invention on a time axis.

In FIG. 8, (a) is an MPEG-2 sequence of media content transmitted from the media content providing server 50, and (b) and (c) are based on a frame rate determined by the media content processing device 130 according to the amount of traffic. Therefore, it represents an MPEG-2 sequence of media content from which frames are selectively removed based on frame compression type.

In the above state, when the traffic amount of the base station 21 is less than the traffic amount set as the congested state, the media content processing apparatus 130 may transmit the received MMT packet to the terminal 10 as it is without adjusting the frame rate. In this case, the frame sequence of the MMT packet transmitted to the terminal 10 is the same as that of FIG. 8A.

On the other hand, when the traffic volume of the base station 21 is greater than the first threshold value, the media content processing apparatus 130 may selectively remove the B frame from the received MMT packets. Accordingly, the frame sequence of the MMT packet transmitted to the terminal 10 through the base station 21 includes a 1-BP frame, as shown in (b) of FIG. 8, and the media content providing server 50 The frame rate is reduced compared to the transmission in In addition, since the amount of data transmission is proportional to the frame rate, the amount of traffic of the base station 21 may be reduced according to a decrease in the frame rate.

In addition, when the traffic volume of the base station 21 is greater than the second threshold (greater than the first threshold), the media content processing apparatus 130 may further remove one P frame along with the B frame among the MMT packets. . Accordingly, the MMT packet transmitted to the terminal 10 through the base station 21 is made of an IP frame, as shown in (c) of FIG. 8, and the frame rate is further reduced than the example of (b) of FIG. 8 And, the amount of traffic of the base station 21 may be further reduced.

The media content transmission control method of the present invention as described above may be provided in the form of a computer-readable medium suitable for storing computer program commands and data. At this time, the program recorded on the recording medium can be read, installed, and executed by a computer to execute the above-described functions.

Here, in order for the computer to read the program recorded on the recording medium and execute the functions implemented as the program, the above-described program is C, C++, which can be read by the computer's processor (CPU) through the computer's device interface. It may include code coded in a computer language such as JAVA and machine language.

This code may include a functional code related to a function defining the above-described functions, and may include a control code related to an execution procedure necessary for the processor of the computer to execute the above-described functions according to a predetermined procedure. In addition, these codes may further include additional information necessary for the processor of the computer to execute the above-described functions, or code related to a memory reference to which location (address address) of the internal or external memory of the computer should be referenced. . In addition, when the computer's processor needs to communicate with any other computer or server in a remote in order to execute the above-described functions, the code is used by the computer's processor using the computer's communication module. It may further include a communication-related code for how to communicate with other computers or servers, and what information or media should be transmitted and received during communication.

Such computer-readable media suitable for storing computer program commands and data include, for example, magnetic media such as hard disks, floppy disks, and magnetic tapes, and compact disk read only memory (CD-ROM). , Optical Media such as DVD (Digital Video Disk), Magneto-Optical Media such as Floptical Disk, and ROM (Read Only Memory), RAM (RAM) , Random Access Memory), flash memory, EPROM (Erasable Programmable ROM), and EEPROM (Electrically Erasable Programmable ROM). The processor and memory can be supplemented by special purpose logic circuits or incorporated into it.

In addition, the computer-readable recording medium is distributed over a computer system connected through a network, so that computer-readable codes can be stored and executed in a distributed manner. In addition, a functional program for implementing the present invention, and related codes and code segments, etc., are programmers in the technical field to which the present invention pertains in consideration of the system environment of a computer that reads the recording medium and executes the program. May be easily inferred or modified by

While this specification includes details of a number of specific implementations, these should not be construed as limiting to the scope of any invention or claim, but rather as a description of features that may be peculiar to a particular embodiment of a particular invention. It must be understood. Certain features described herein in the context of separate embodiments may be implemented in combination in a single embodiment. Conversely, various features described in the context of a single embodiment can also be implemented in multiple embodiments individually or in any suitable sub-combination. Furthermore, although features operate in a particular combination and may be initially described as so claimed, one or more features from a claimed combination may in some cases be excluded from the combination, and the claimed combination may be a subcombination. Or sub-combination variations.

Likewise, although operations are depicted in the drawings in a specific order, it should not be understood that such operations must be performed in that particular order or sequential order shown, or that all illustrated operations must be performed in order to obtain a desired result. In certain cases, multitasking and parallel processing can be advantageous. In addition, separation of the various system components of the above-described embodiments should not be understood as requiring such separation in all embodiments, and the program components and systems described are generally integrated together into a single software product or packaged in multiple software products. You should understand that you can.

The present invention is for adjusting a frame rate of media content transmitted through a communication network on the communication network, and transmitting the media content according to the MMT standard, but configuring a Media Fragment Unit (MFU) of an MMT packet for each frame, and the MFU By inserting the frame compression type information in the header of the communication network, the MMT packet of the media content is parsed on the communication network, and the MFU of each frame is selectively removed by referring to the frame compression type information, thereby enabling traffic control on the communication network. have.

In addition, according to the present invention, it is possible to adjust the frame rate of the media content through the analysis of the MMT packet on the communication network, thereby solving the traffic overload problem by adjusting the frame rate of the media content according to the traffic amount of the communication network.

10: terminal 20: access network
21: base station 30: core network
40: Internet network 50: Media content providing server
100: media content delivery control system
110: switching device 120: monitoring device
130: media content processing device

Claims (14)

Receiving an MPEG Media Transport (MMT) packet transmitted from a media content providing server to a terminal through a communication network;
Analyzing the MMT packet to extract a Media Fragment Unit (MFU);
Extracting frame compression type information of the MFU from the header of the MFU;
Selecting a data unit of specific frame compression type information among MFUs included in the MMT packet at a rate according to a preset frame rate according to the amount of traffic transmitted through a specific base station for traffic control; And
Removing the selected MFU, and transmitting the MMT packet containing the unselected MFU to the terminal media content transmission control method by a media content processing device. The method of claim 1, prior to the step of extracting the MFU,
Analyzing the header of the MMT packet, determining whether the MMT packet is a frame rate adjustment target; further comprising,
The extracting of the MFU is performed on an MMT packet identified as a frame rate adjustment target. The method of claim 2,
And transmitting an MMT packet that is not subject to frame rate adjustment to the terminal as it is. The method of claim 2, wherein determining whether the frame rate is to be adjusted
Analyzing the MMT header of the MMT packet to check the priority according to the packet type; And
And determining whether or not the frame rate is to be adjusted according to the priority. 2. A method of controlling media content transmission by a media content processing apparatus comprising: The method of claim 2, wherein determining whether the frame rate is to be adjusted
Analyzing an MMT payload header of the MMT packet to determine whether the data type carried in the payload of the MMT packet is an MPU;
And determining a frame rate adjustment target when the data type is MPU. The method of claim 1, wherein receiving the MPEG Media Transport (MMT) packet
And redirecting an MMT packet among packets transmitted to the base station to the media content processing device through a switching device connected between a specific base station and a core network. delete The method of claim 1,
The MFU is a media content transmission control method by a media content processing device, characterized in that configured in a frame unit. The method of claim 1,
The specific frame compression type information is one of a P type and a B type type defined in the MPEG standard. A computer-readable recording medium in which a program for executing the media content transmission control method according to any one of claims 1 to 6, 8 and 9 is recorded. Any one of claims 1 to 6, claim 8 and claim 9 is implemented to execute a media content transmission control method as described in any one of items computer program recorded in a computer-readable recording medium. An input/output interface module for receiving an MMT packet transmitted from a media content providing server to a terminal from a communication network and outputting the MMT packet to the communication network;
An analysis module for analyzing the MMT packet to extract a Media Fragment Unit (MFU), and extracting frame compression type information of the MFU from the header of the MFU; And
Among the MFU included in the MMT packet, a data unit of specific frame compression type information is selected at a rate according to a preset frame rate according to the amount of traffic transmitted through a specific base station for traffic control, and the selected MFU is removed and not selected. Media content processing apparatus comprising a control module for outputting the MMT packet including the MFU to the communication network through the input/output interface module. The method of claim 12,
The analysis module analyzes the header of the MMT packet to extract priority information according to the packet type of the MMT packet, or analyzes the MMT payload header of the MMT packet to determine the type of data carried in the payload of the MMT packet. Check more,
The control module determines whether the MMT packet is a frame rate adjustment target based on one or more of the priority and the data type, and if it is not a frame rate adjustment target, the MMT packet is passed through the input/output interface module as it is. Media content processing device, characterized in that output to the communication network. delete

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