WO2015084000A1 - Appareil et procédé de transmission et de réception d'un contenu - Google Patents

Appareil et procédé de transmission et de réception d'un contenu Download PDF

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Publication number
WO2015084000A1
WO2015084000A1 PCT/KR2014/011628 KR2014011628W WO2015084000A1 WO 2015084000 A1 WO2015084000 A1 WO 2015084000A1 KR 2014011628 W KR2014011628 W KR 2014011628W WO 2015084000 A1 WO2015084000 A1 WO 2015084000A1
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WIPO (PCT)
Prior art keywords
content
transmission rate
target
bandwidth
packet loss
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Application number
PCT/KR2014/011628
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English (en)
Korean (ko)
Inventor
요시모토모리오
Original Assignee
삼성전자 주식회사
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Priority claimed from JP2013249025A external-priority patent/JP6294062B2/ja
Application filed by 삼성전자 주식회사 filed Critical 삼성전자 주식회사
Publication of WO2015084000A1 publication Critical patent/WO2015084000A1/fr
Priority to US15/171,649 priority Critical patent/US10187671B2/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/262—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists
    • H04N21/26208—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints
    • H04N21/26216—Content or additional data distribution scheduling, e.g. sending additional data at off-peak times, updating software modules, calculating the carousel transmission frequency, delaying a video stream transmission, generating play-lists the scheduling operation being performed under constraints involving the channel capacity, e.g. network bandwidth
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2381—Adapting the multiplex stream to a specific network, e.g. an Internet Protocol [IP] network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/238—Interfacing the downstream path of the transmission network, e.g. adapting the transmission rate of a video stream to network bandwidth; Processing of multiplex streams
    • H04N21/2385—Channel allocation; Bandwidth allocation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available

Definitions

  • the present invention relates to a content transmitter for distributing content in real time to an IP network and a content receiver for receiving content distributed in real time. More particularly, the present invention relates to quality of service (QoS) control of a session for transmitting real time content. .
  • QoS quality of service
  • a home network incorporating various transmission paths such as wired LAN, wireless LAN, WiFi (registered trademark), and WiFi Direct is to be built in a home.
  • the DLNA Digital Living Network Alliance
  • various AV devices such as television receivers and home servers can be connected to the home network to transmit and receive contents such as video and audio.
  • the content stored in the home server can be viewed on a television set installed in another room or on a tablet terminal which is moved to any place in the home.
  • the home network may be further connected to a wide area network such as the Internet.
  • a television receiver connected to a home network through such an expanded IP network can simultaneously receive a plurality of contents (data streams) distributed in real time from various content providers or the like (see Patent Document 1, for example).
  • Patent Document 1 Japanese Patent Application Laid-Open No. 2011-155406
  • Standard protocol standards for real-time distribution of content in IP networks include Real-time Transport Protocol (RTP) / RTP Control Protocol (RTP) or Real Time Streaming Protocol (RTSP).
  • RTP Real-time Transport Protocol
  • RTP RTP Control Protocol
  • RTSP Real Time Streaming Protocol
  • the receiving device notifies the transmitting device of the reception report periodically, and the transmitting device can change the transmission rate in accordance with the receiving report notified from the receiving device.
  • the transmission rate is optimized according to the network environment at that time, so that the reception apparatus can always receive the content in the best state.
  • bandwidth is occupied in a specific session when content is distributed independently in a plurality of sessions.
  • the bandwidth is 20 Mbps
  • the bandwidth allocable to the other transmitting device B is only 1 Mbps, so that sufficient quality is obtained from the transmitting device B.
  • content distribution will not be possible.
  • the transmission rate of the transmission device B changes, packet loss is caused to the streaming data of the transmission device A, and as a result, the transmission device A and B cannot both transmit content having sufficient quality. There is concern.
  • the bandwidth allocable to the transmitting device B increases, so that the transmitting device B can distribute content of sufficient quality, but receives the content from the transmitting device A again. In order to do so, it is necessary to re-establish a session with the transmitting apparatus A, buffer the data, and the like, so that it takes a long time to receive the content again.
  • an object of the present invention is to enable QoS control of a session by a content receiving apparatus at the time of distributing real-time content according to standard standards such as RTP / RTCP and RTSP.
  • the QoS of a session can be controlled by the content receiving apparatus at the time of distributing real-time content by standard standards, such as RTP / RTCP and RTSP.
  • standard standards such as RTP / RTCP and RTSP.
  • FIG. 1 is a schematic diagram of a content distribution system according to an embodiment of the present invention.
  • FIG. 2 is a block diagram showing the configuration of a content transmitting apparatus according to an embodiment of the present invention.
  • FIG. 3 is a block diagram showing the configuration of a content receiving apparatus according to an embodiment of the present invention.
  • FIG. 4 is a block diagram illustrating a communication control unit of a content receiving device according to one embodiment of the present invention.
  • FIG. 5 is a flowchart of a content receiving method according to an embodiment of the present invention.
  • FIG. 6 is a detailed flowchart of QoS control by a content receiving device according to an embodiment of the present invention.
  • FIG. 7 is a flowchart illustrating a reception state measurement by a content receiving device according to an embodiment of the present invention.
  • FIG. 8 is a graph showing a change in bandwidth of two sessions due to QoS control according to an example.
  • 9 is a graph illustrating a change in bandwidth of two sessions due to QoS control according to another example.
  • a content receiving device of one embodiment of the present invention includes a network interface for receiving first content from a first transmitting device and receiving second content from a second transmitting device; and a user among the first content and the second content. And a controller for selecting the first content based on an input, wherein the controller is configured to increase a first bandwidth allocated to the first transmitting device among the bandwidths of the network interface and based on the increased first bandwidth. The second bandwidth allocated to the second transmitting device among the bandwidths of the network interface is reduced.
  • the reception quality of the content having a different value from the actual is notified to the content transmission device, and the content transmission device changes the transmission rate according to the reception quality of the content having a different value from the notified actual. Therefore, the QoS of the session can be substantially controlled by the content transmission device.
  • the controller determines a first target transmission rate corresponding to the increased first bandwidth, measures a first transmission rate at which the first content is received, and the measured first transmission rate is the first target transmission. If lower than the rate, the network interface may be controlled to transmit information related to the first target transmission rate to the first transmission device.
  • the information related to the first target transmission rate may include a request message for requesting the first transmission device to transmit the first content according to the first target transmission rate.
  • the controller determines a second target transmission rate corresponding to the reduced second bandwidth, measures a second transmission rate at which the second content is received, and the measured second transmission rate is the second target transmission. If the rate is higher than the rate, the network interface may be controlled to transmit information related to the second target transmission rate to the second transmission device.
  • the control unit measures a first packet loss rate associated with the first transmission device, determines a first target packet loss rate based on the increased first bandwidth, and determines the first target packet loss rate determined by the first transmission device.
  • the network interface may be controlled to transmit information related to the.
  • the information related to the first target packet loss rate may include a request message for requesting the first transmission device to transmit the first content according to the first target packet loss rate.
  • the control unit measures a second packet loss rate related to the second transmission device, determines a second target packet loss rate based on the reduced second bandwidth, and determines the second target packet loss rate determined by the second transmission device.
  • the network interface may be controlled to transmit information related to the.
  • the content reception method includes the steps of: receiving first content from a first transmission device and receiving second content from a second transmission device via a network interface; and the first content and the second content. Selecting the first content among content based on a user input; Increase a first bandwidth allocated to the first transmitting device among the bandwidths of the network interface, and reduce a second bandwidth allocated to the second transmitting device among the bandwidths of the network interface based on the increased first bandwidth; Controlling to
  • a session quality having a different value from the actual is notified to the content transmitting apparatus so that the content transmitting apparatus changes the transmission rate according to the session quality having a different value from the notified actual. Therefore, the QoS of the session can be substantially controlled by the content transmission device.
  • a content transmission device includes an encoder unit for encoding content into a predetermined format; A packetizer for dividing and encoding the content encoded from the encoder into at least one payload data; A communication control unit for connecting to a network to establish a session with a content receiving device and transmitting the packetized content according to a predetermined transmission rate through each session, wherein the communication control unit includes a target transmission rate received from the content receiving device. The transmission rate is changed according to the related information or the reception state information of the session.
  • the IP network 101 is a comprehensive network including a home LAN and the like connected to the Internet through the Internet and a router not shown. Each device connected to the IP network 101 is assigned an IP address, and each device can identify and communicate with the IP address.
  • the content transmission device 10 is, for example, a server device arranged in a content provider or the like.
  • the content transmission device 10 accumulates various types of content such as video content and audio content, and distributes the content to unicast or multicast to one or a plurality of client devices in the IP network 101.
  • Content is distributed in real time according to transport protocol specifications such as RTP / RTCP and RTSP.
  • the content receiving device 20 corresponds to a client device that receives the content distributed by the content transmitting device 10 in real time, and can be realized by, for example, a television receiver, a tablet terminal, a PC, or the like.
  • FIG. 2 is a block diagram showing the configuration of a content transmitting apparatus according to an embodiment of the present invention.
  • the apparatus for transmitting content of FIG. 2 includes a communication controller 110, an encoder 120, a packetizer 130, and a storage 140.
  • the communication controller 110 connects to the IP network 101, establishes a session with the content receiving apparatus 20, and controls encoding and packetization processing of the encoder 120 and the packetizer 130. In addition, the communication control unit 110 changes the transmission rate according to the reception state of the session received from the content receiving device 20.
  • the encoder unit 120 encodes the content in a predetermined format according to the control signal of the communication control unit 110.
  • the packetizer 130 divides the content encoded by the encoder unit 120 into payload data according to a control signal of the communication controller 110 to form IP packets, and transmits packet data according to a predetermined transmission rate through each session. do.
  • the storage 140 stores the content to be transmitted to the content receiving device 20.
  • FIG. 3 is a block diagram showing the configuration of a content receiving apparatus according to an embodiment of the present invention.
  • the content receiving device 20 of FIG. 3 includes a communication control unit 201, a decoder unit 202, a display unit 203, an input unit 204, and a storage unit 205.
  • the communication control unit 201 establishes a session with at least one content transmission device 10 connected to the IP network 101, and transmits packet data of content distributed in real time from the at least one content transmission device through the session.
  • a reception state such as a packet loss rate at the time of receiving packet data of the content is measured, and the at least one content transmission device 10 is notified of the reception state based on the measurement result of the reception state.
  • the decoder unit 202 decodes and reproduces the packet data received through the communication control unit 201.
  • the display unit 203 displays information on a series of operation states and operation results that occur while the communication control unit 201 performs a communication function, and also displays content decoded by the decoder unit 202.
  • the display unit 203 includes a liquid crystal display (LCD), a thin film transistor LCD (TFT-LCD), organic light emitting diodes (OLED), a light emitting diode (LED), an active matrix organic LED (AMOLED), a flexible display (flexible display). ) And a three-dimensional display (3 Dimesion), but is not limited thereto.
  • the input unit 204 receives various information such as numeric and character information, and transmits a signal input in connection with various function control to the communication control unit 201.
  • the input unit 204 is a key input means such as a keyboard or a keypad. It may include one or more of a touch input means such as a touch sensor or a touch pad, a gyro sensor, a geomagnetic sensor, an acceleration sensor and a proximity sensor, and a gesture input means or voice input means including at least one of a camera, It is not limited to this.
  • the storage unit 205 stores various data generated during execution of the application program, including an application program required for operating a function according to an embodiment of the present invention.
  • the storage unit 205 may include a flash memory, a hard disk, a multimedia card type memory, a RAM, and a storage medium of a ROM, but is not limited thereto.
  • FIG. 4 is a block diagram of a communication control unit 201 of a content receiving device according to an embodiment of the present invention.
  • the communication control unit 201 has a network interface (NIC) 21 and a control unit 2, and the control unit 2 receives the session managing unit 22, the data receiving unit 23, and the reception state measuring unit 24.
  • the state notification part 25 is provided.
  • the NIC 21 is a wireless LAN, WiFi (registered trademark), WiFi Direct, wired LAN, PLC (for example, 2.4 GHz band or 5.2 GHz band defined by a transmission standard IEEE802.11b / 11a / 11g / 11n / 11ac, for example). It is one of various network interfaces such as Power Line Communications.
  • the NIC 21 is given an IP address.
  • the content receiving device 20 is identified as a unicast destination or a multicast destination of real-time content by an IP address assigned to the NIC 21.
  • the NIC 21 receives content from a plurality of transmitters. For example, the NIC 21 receives the first content from the first transmitting device and receives the second content from the second transmitting device.
  • the controller 2 selects the first content based on a user input among the first content and the second content received from the NIC 210.
  • the controller may increase the first bandwidth allocated to the first transmitting device among the bandwidths of the NIC 210, and the second bandwidth allocated to the second transmitting device among the bandwidths of the NIC 210 based on the increased first bandwidth. Reduce the first bandwidth allocated to the first transmitting device among the bandwidths of the NIC 210.
  • control unit 2 Referring to the control unit 2 in more detail,
  • the session management unit 22 establishes a communication session with the content transmission device 10 using the IP address assigned to the NIC 21.
  • a session means an active connection between the content transmitting device 10 and the content receiving device 20.
  • the session managing unit 22 separately from each of the content transmitting apparatuses 10.
  • Establish a communication session when there are a plurality of content transmitting apparatuses 10 and receives real-time content from each of the content transmitting apparatuses 10, the session managing unit 22 separately from each of the content transmitting apparatuses 10.
  • the content receiving device 20 may also perform TCP communication through the NIC 21 with other server devices not shown. In that case, the session manager 22 establishes another session with the server device. In this way, a plurality of sessions are established by the session manager 22 so that the bandwidth of the NIC 21 is divided by these sessions.
  • Each content transmitting device 10 encodes the content into a predetermined format, divides the encoded content into payload data, IP packetizes the packet data (streaming data) through each session established by the session management unit 22, and the like. Send.
  • the data receiving unit 23 receives the packet data through a session established with each content receiving apparatus 10, extracts payload data in the packet data, and reconstructs the encoded content. Each reconstructed content is decoded and reproduced by a decoder not shown in the content receiving device 20.
  • the reception state measurement unit 24 measures each reception state when the data reception unit 23 receives the packet data of the content from each content transmission device 10.
  • the reception state and the available bandwidth are correlated. For example, if sufficient bandwidth is not allocated to a session, its reception becomes worse, and the packet loss rate or delay variation increases when data is transmitted at a high transmission rate. On the contrary, if sufficient bandwidth is allocated to a session, the session quality is improved, so that data can be received at a packet loss rate and a small delay variation even when data is transmitted at a high transmission rate. Thus, each reception state can be measured by the packet loss rate in the session.
  • the reception state measurement unit 24 calculates the packet loss rate and the like for each session when the data reception unit 23 receives the packet data of each content, and measures the reception state in the magnitude of the packet loss rate and the like.
  • the reception state measurement unit 24 can estimate the transmission rate of each content transmission device 10 based on the detected reception state.
  • the transmission rate can be calculated from, for example, the resolution, display color and frame rate of the content distributed over the session.
  • the estimated transmission rate is referred to when QoS control of the session with the content transmission apparatus 10 which should lower the transmission rate. QoS control of the session will be described later.
  • the reception status is notified to each content transmission device 10 based on the measurement result of the reception status measurement unit 24.
  • the reception status of the RTP data is transmitted to the transmitting apparatus, or information of the transmitting apparatus or session information of the receiving apparatus comes and goes.
  • one of the reports notified from the receiving apparatus to the transmitting apparatus is a RR (Receiver Report), and the receiving apparatus can notify the transmitting apparatus of the receiving state, that is, the receiving state by the RR.
  • the reception status notification unit 25 can set the value to the parameter Fraction Lost or cumulative number of packets lost in the RR to notify each content transmission device 10 of the reception status.
  • each content transmission device 10 When each content transmission device 10 receives the notification of the reception state from the content reception device 20, it can change the transmission rate in accordance with the notified reception state. For example, when the value of fraction loss or cumulative number of packets lost is large, the content transmission device 10 lowers the transmission rate in order to prevent packet loss. On the contrary, if the value of fraction loss or cumulative number of packets lost is small, the content transmission device 10 determines that sufficient bandwidth is secured and increases the transmission rate.
  • the transmitting apparatus changes the transmission rate in accordance with the reception state notified from the receiving apparatus, and there is no means for controlling or requesting the changing of the transmission rate from the receiving apparatus to the transmitting apparatus. not.
  • the reception state notification unit 25 notifies the arbitrary content transmission device 10 of the reception state having a value different from that of the measurement result of the reception state measurement unit 24.
  • the content transmission device 10 is notified from the content reception device 20 of a reception state having a value different from the actual value, the content transmission device 10 changes the transmission rate according to the notification reception state. This allows the content receiving device 20 to control the transmission rate of any content transmitting device 10 substantially.
  • FIG. 5 is a flowchart illustrating a content receiving method according to an embodiment of the present invention.
  • the content receiving apparatus 20 has a network interface connected to the IP network to establish a session with at least one content transmitting apparatus 10 connected to the IP network.
  • the content receiving device 20 receives real-time content distributed from each content transmitting device 10 through each set session.
  • the content receiving device 20 receives the first content and the second content from the first content transmitting device and the second content transmitting device via the NIC 21, respectively.
  • the content receiving device 20 selects the first content based on a user input among the first content and the second content distributed from each content transmitting device 10.
  • the content receiving device 20 increases the first bandwidth allocated to the first transmitting device among the bandwidths of the network interface, and allocates the content to the second transmitting device among the bandwidths of the network interface based on the increased first bandwidth. Control to reduce the second bandwidth to be.
  • the content receiving device 20 determines a first target transmission rate corresponding to the increased first bandwidth, measures a first transmission rate at which the first content is received, and measures the measured first transmission rate. If lower than the first target transmission rate, the network interface is controlled to transmit information related to the first target transmission rate to a first transmission device.
  • the information related to the first target transmission rate may include a request message for requesting the first transmission device to transmit the first content according to the first target transmission rate.
  • the content receiving apparatus 20 determines a second target transmission rate corresponding to the reduced second bandwidth, measures a second transmission rate at which second content is received, and the measured second transmission rate is the second target transmission. If it is higher than the rate, the network interface is controlled to transmit information related to the second target transmission rate to a second transmission device.
  • the content receiving apparatus 20 measures a first packet loss rate associated with the first transmitting device and determines a first target packet loss rate based on the increased first bandwidth and the measured first packet loss rate.
  • the network interface is controlled to transmit information related to the determined first target packet loss rate to the first transmission device.
  • the information related to the first target packet loss rate may include a request message for requesting the first transmission device to transmit the first content according to the first target packet loss rate.
  • the content receiving device 20 measures a second packet loss rate associated with the second transmitting device, determines a second target packet loss rate based on the reduced second bandwidth and the measured second packet loss rate, and transmits the second packet loss rate to the second transmitting device.
  • the network interface is controlled to transmit information related to the determined second target packet loss rate.
  • the content transmission device 10 changes the transmission rate according to the information related to the transmission rate received from the content receiving device 20 and the reception state information.
  • FIG. 6 is a detailed flowchart of QoS control by a content receiving device according to an embodiment of the present invention.
  • the content receiving device 20 establishes a session with each content transmitting device 10, and receives real-time content distributed from each content transmitting device 10 through each session in which the data receiving unit 23 is established. (Step 610).
  • the content receiving device 20 measures a transmission rate based on the measured reception state in each session (step 620).
  • the reception state measurement can be performed by calculating the packet loss rate in the session as described above.
  • the user may appropriately select the content to be viewed on the content receiving device 20.
  • the content receiving device 20 selects the first content based on a user input among the first content of the first transmitting device and the second content of the second transmitting device.
  • the user can display the content to be viewed on the screen and minimize the screen of the content not to be viewed.
  • the content receiving device 20 continues to receive content that the user does not watch in the background, but the content does not need to be displayed on the screen.
  • the content transmission device 10 may distribute the content that the user does not watch at the minimum transmission rate that can distribute the content. This frees up bandwidth and allows you to allocate more bandwidth to other sessions. That is, the content receiving device 20 increases the first bandwidth allocated to the first transmitting device among the bandwidths of the network interface, and based on the increased first bandwidth, the content receiving device 20 is assigned to the second transmitting device among the bandwidths of the network interface. Reduce bandwidth
  • the content transmitting device 10 (the target content sending device 10 of the target) that the content receiving device 20 should lower the transmission rate can distribute the content to.
  • the lowest transmission rate is calculated and the lowest transmission rate is set as a target value (step 630).
  • the content receiving device 20 notifies the target content transmission device 10 of the target transmission rate related message to transmit the content according to the target transmission rate (step 640).
  • the content receiving device 20 determines a first target transmission rate corresponding to the increased first bandwidth, measures a first transmission rate at which the first content is received, and measures the measured first transmission rate. When lower than the first target transmission rate, information related to the first target transmission rate is transmitted to the first transmission device.
  • the content receiving apparatus 20 determines a second target transmission rate corresponding to the reduced second bandwidth, measures a second transmission rate at which the second content is received, and the measured second transmission rate is determined by the second transmission rate. If the target transmission rate is higher than the target transmission rate, the second transmission device transmits information related to the second target transmission rate.
  • the content receiving device 20 measures a first packet loss rate associated with the first transmitting device, determines a first target packet loss rate based on the increased first bandwidth and the measured first packet loss rate, The information related to the determined first target packet loss rate is transmitted to the first transmitting device.
  • the content receiving device 20 measures a second packet loss rate associated with the second transmitting device, determines a second target packet loss rate based on the reduced second bandwidth and the measured second packet loss rate, and the second transmitting device. Transmits the information related to the determined second target packet loss rate.
  • the content receiving device 20 may intentionally set a value that is worse (lower) than a measured actual reception state, for example, a Fraction Lost or cumulative number of packets lost, to the target content transmitting device 10.
  • the reception status is notified.
  • the target content transmission device 10 starts to lower the transmission rate by being notified of the target transmission rate related message.
  • the content receiving apparatus 20 supplies the target transmission rate to the target content transmitting apparatus 10 until the transmission rate of the target content transmitting apparatus 10 is lowered to a target value, that is, the minimum transmission rate (NO in step 650).
  • the related message is continuously notified.
  • the content receiving device 20 continues to notify the target content transmitting device 10 of a reception state of a value which is worse than the actual value. If the transmission rate of the target content transmitter 10 is lowered to the target value (YES in step 650), QoS control of the session by the content receiver 20 is terminated.
  • FIG. 7 is a flowchart illustrating a reception state measurement of the content receiving device 20 according to an embodiment of the present invention.
  • the content receiving device 20 receives packet data of real-time first content and second content distributed from the first content sending device and the second content sending device.
  • the content receiving apparatus 20 calculates a packet loss rate and the like for each session when receiving packet data of each content.
  • the content receiving apparatus 20 measures a reception state based on a packet loss rate or the like.
  • FIG 8 is a graph showing a change in bandwidth of two sessions by QoS control according to an example. If session A and session B divide the bandwidth of NIC 21 and the content transmitted through session A is not viewed, the bandwidth of session A is reduced by the QoS control by content receiving apparatus 20. Can be. This frees up the bandwidth of the NIC 21 and allocates it to Session B so that the bandwidth of Session B is increased.
  • the content reception device 20 may improve the quality of the improved value for the content transmission device 10 of the target. (Content reception status) may be notified.
  • the transmission rate of the target content transmission device 10 can be slightly increased from the minimum transmission rate, so that the screen can be quickly displayed when the content distributed from the target content transmission device 10 by the user is selected again. .
  • the content receiving device 20 may intentionally set a better (higher) value, e.g. Fraction Lost or cumulative number of packets lost, than the actual quality (received) measured.
  • the content (receiving state) may be notified to the content transmission device 10 that is determined to raise the transmission rate. By doing in this way, the transmission rate of the content transmission apparatus 10 which should raise a transmission rate can be raised rapidly, and the bandwidth of session B can be rapidly increased.
  • the transmission rate of the target content transmission device 10 may be lowered so that the bandwidths of session A and session B become the same without making the transmission rate of the target content transmission device 10 the minimum transmission rate.
  • the content receiving apparatus 20 estimates the transmission rates of the two content transmission apparatuses 10, and the target content transmission apparatus 10 (the target content transmission apparatus until the transmission rates of the two content transmission apparatuses 10 are the same).
  • session A the quality (receive status) of a value that is worse than the actual value is continuously reported.
  • the bandwidth of session A is reduced, thereby freeing up bandwidth of NIC 21, which is allocated to session B, and the bandwidth of session B is increased, so that the bandwidths of sessions A and B can be made almost equal.
  • the target bandwidths of the sessions A and B may be set according to the type of content transmitted in each session without making the bandwidths of the sessions A and B the same. For example, if 1920 ⁇ 1080p video content is transmitted in session A and 1280 ⁇ 720p video content is transmitted in session B, 2/3 of the full bandwidth is used for session A, and 1/3 of the full bandwidth is used for session B.
  • bandwidth may be proportionally distributed according to the amount of information in each session. The bandwidth of each session can be made closer to the target value by notifying each content transmitting apparatus 10 of a quality (receive state) different from the actual value so that the bandwidth is proportionally allocated.
  • the content transmission device 10 is notified of the quality (receive state) of a different value than the actual value determined by the content transmission device 10, so that the transmission rate of the content transmission device 10 is lowered and the IP
  • the bandwidth of the network 101 is afforded. This allows you to allocate free bandwidth to other communications.
  • One or more programs including instructions for performing a computer-implemented method of executing an information processing method according to embodiments of the present invention may be recorded as computer readable codes on a computer readable recording medium.
  • Computer-readable recording media include all kinds of storage devices that store data that can be read by a computer system. Examples of computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage device, and the like.
  • the computer readable recording medium can also be distributed over network coupled computer systems so that the computer readable code is stored and executed in a distributed fashion.
  • the present invention relates to a content transmitting and receiving device and method, and is generally applicable to a computer, a television, a mobile terminal, an AV device, and the like.

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  • Engineering & Computer Science (AREA)
  • Multimedia (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Databases & Information Systems (AREA)
  • Two-Way Televisions, Distribution Of Moving Picture Or The Like (AREA)
  • Data Exchanges In Wide-Area Networks (AREA)

Abstract

La présente invention concerne un appareil et un procédé de transmission et de réception d'un contenu, l'appareil comprenant : une interface réseau destinée à recevoir un premier contenu d'une première unité de transmission et à recevoir un second contenu d'une seconde unité de transmission ; et une unité de commande destinée à sélectionner le premier contenu sur la base d'une entrée d'utilisateur du premier contenu et du second contenu, l'unité de commande augmentant une première largeur de bande attribuée à la première unité de transmission parmi des largeurs de bande de l'interface réseau et diminuant une seconde largeur de bande attribuée à la seconde unité de transmission parmi les largeurs de bande de l'interface réseau sur la base de la première largeur de bande augmentée.
PCT/KR2014/011628 2013-12-02 2014-12-01 Appareil et procédé de transmission et de réception d'un contenu WO2015084000A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
US15/171,649 US10187671B2 (en) 2013-12-02 2016-06-02 Apparatus and method for transmitting and receiving content

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
JP2013249025A JP6294062B2 (ja) 2013-12-02 2013-12-02 コンテンツ受信装置およびコンテンツ配信システム
JP2013-249025 2013-12-02
KR10-2014-0169177 2014-11-28
KR1020140169177A KR102280168B1 (ko) 2013-12-02 2014-11-28 콘텐츠 송수신 장치 및 방법

Related Child Applications (1)

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US15/171,649 Continuation US10187671B2 (en) 2013-12-02 2016-06-02 Apparatus and method for transmitting and receiving content

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WO2015084000A1 true WO2015084000A1 (fr) 2015-06-11

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PCT/KR2014/011628 WO2015084000A1 (fr) 2013-12-02 2014-12-01 Appareil et procédé de transmission et de réception d'un contenu

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WO (1) WO2015084000A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900007037A1 (it) * 2019-05-20 2020-11-20 Sky Italia S R L Dispositivo, metodo e programma per elaboratore e sistema per distribuire contenuti sulla base della qualità di esperienza.

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KR20080030678A (ko) * 2005-08-09 2008-04-04 샤프 가부시키가이샤 데이터 기록 장치, 데이터 재생 장치, 및 컴퓨터 판독 가능한 기록 매체
KR20110029920A (ko) * 2009-09-16 2011-03-23 (주)넷비젼텔레콤 이종 링크 상에서의 패킷 전송 방법 및 그 시스템
KR20120023878A (ko) * 2010-09-02 2012-03-14 주식회사 케이티 복수의 멀티캐스트 그룹을 구비하는 멀티캐스트 환경에서 통신단말로 컨텐츠를 제공하는 방법과 그 방법을 위한 스트리밍 장치 및 통신단말
KR20130008522A (ko) * 2010-02-12 2013-01-22 톰슨 라이센싱 동기화된 컨텐츠 재생 방법
KR20130129972A (ko) * 2010-12-17 2013-11-29 파나소닉 주식회사 데이터 전송 장치 및 데이터 전송 제어 장치

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR20080030678A (ko) * 2005-08-09 2008-04-04 샤프 가부시키가이샤 데이터 기록 장치, 데이터 재생 장치, 및 컴퓨터 판독 가능한 기록 매체
KR20110029920A (ko) * 2009-09-16 2011-03-23 (주)넷비젼텔레콤 이종 링크 상에서의 패킷 전송 방법 및 그 시스템
KR20130008522A (ko) * 2010-02-12 2013-01-22 톰슨 라이센싱 동기화된 컨텐츠 재생 방법
KR20120023878A (ko) * 2010-09-02 2012-03-14 주식회사 케이티 복수의 멀티캐스트 그룹을 구비하는 멀티캐스트 환경에서 통신단말로 컨텐츠를 제공하는 방법과 그 방법을 위한 스트리밍 장치 및 통신단말
KR20130129972A (ko) * 2010-12-17 2013-11-29 파나소닉 주식회사 데이터 전송 장치 및 데이터 전송 제어 장치

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT201900007037A1 (it) * 2019-05-20 2020-11-20 Sky Italia S R L Dispositivo, metodo e programma per elaboratore e sistema per distribuire contenuti sulla base della qualità di esperienza.
WO2020234788A1 (fr) * 2019-05-20 2020-11-26 Sky Italia S.R.L. Dispositif, procédé et programme pour ordinateur et système de distribution de contenu sur la base de la qualité d'expérience

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