KR20130060976A - Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding - Google Patents

Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding Download PDF

Info

Publication number
KR20130060976A
KR20130060976A KR1020110127316A KR20110127316A KR20130060976A KR 20130060976 A KR20130060976 A KR 20130060976A KR 1020110127316 A KR1020110127316 A KR 1020110127316A KR 20110127316 A KR20110127316 A KR 20110127316A KR 20130060976 A KR20130060976 A KR 20130060976A
Authority
KR
South Korea
Prior art keywords
video data
layered video
data
svc
importance
Prior art date
Application number
KR1020110127316A
Other languages
Korean (ko)
Inventor
윤지선
신지태
김요한
조태민
Original Assignee
성균관대학교산학협력단
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 성균관대학교산학협력단 filed Critical 성균관대학교산학협력단
Priority to KR1020110127316A priority Critical patent/KR20130060976A/en
Publication of KR20130060976A publication Critical patent/KR20130060976A/en

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/30—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using hierarchical techniques, e.g. scalability
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N19/00—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals
    • H04N19/65—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience
    • H04N19/67—Methods or arrangements for coding, decoding, compressing or decompressing digital video signals using error resilience involving unequal error protection [UEP], i.e. providing protection according to the importance of the data

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Multimedia (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Compression Or Coding Systems Of Tv Signals (AREA)

Abstract

The present invention discloses a method and apparatus for transmitting SVC layered video data through network coding, and a receiving method and apparatus capable of performing network coding at a relay node to provide UEP (Unequal Error Protection) to improve video quality. have. In the data transmission method, the relay node transmits scalable video coding (SVC) layered video data in a wireless network in which a source node, a relay node and a destination node exist, and receives SVC layered video data from the source node. A receiving step; A network coding step of decoding the received SVC layered video data and network coding the data inclusion frequency according to importance; And transmitting the network coded data to the destination node. Therefore, it is possible to improve the decoding success rate of the base layer data having the highest importance in transmitting the SVC layered video data.

Description

Method and apparatus for transmitting SVC layered video data through network coding, and method and apparatus for receiving therein {SCALABLE VIDEO CODING LAYERED VIDEO DATA

The present invention relates to a data transmission method and apparatus, and a receiving method and apparatus, and more particularly, to a method and apparatus for transmitting video data using network coding in a wireless network in which a source node, a relay node, and a destination node exist. And a receiving method and apparatus.

Network coding may be performed by a relay node on a wireless network where a source node, a relay node and a destination node exist. The relay node does not store and forward data received from the source node, but decodes the received data, re-manufactures it, and transmits it to the destination node. This coding on the network is called network coding.

Conventional techniques related to such network coding exist for describing a transmission process in a relay network using network coding and MIMO. However, it only considers transmission technology, and only records the process of using logical exclusive sum (XOR) with regard to logical exclusive sum (XOR) in network coding. Therefore, since there is no data processing according to the importance, there is a problem that the destination node cannot fully process the decoding despite receiving other data.

Other prior arts also present the entire process of transmitting, receiving and decoding base layer data and enhancement layer data using network coding in consideration of video data. However, this also does not protect the base layer data, which is important data. Therefore, there is a problem in that all transmission data cannot be decoded when the base layer, which is important data here, is not received.

Republic of Korea Open Patent KR 10-2010-0071626 ("Transmission and reception of signals in a wireless communication system having a relay node", Korea Electronics and Telecommunications Research Institute, 2010.06.29 published)

SUMMARY OF THE INVENTION An object of the present invention for solving the above problems is to provide unequal error protection (UEP) by performing network coding at a relay node for scalable video coding (SVC) layered video data having different importance for each data. The present invention provides a method and apparatus for transmitting SVC layered video data through network coding and a receiving method and apparatus capable of improving quality.

In order to achieve the above object, the method of transmitting SVC layered video data through network coding according to the present invention provides a SVC (Scalable Video Coding) layered video data in a wireless network in which a source node, a relay node, and a destination node exist. A method of transmitting a data, the method comprising: receiving SVC layered video data from the source node; A network coding step of decoding the received SVC layered video data and network coding the data inclusion frequency according to importance; And a transmitting step of transmitting the network coded data to the destination node.

The network coding step may include network coding such that the SVC layered video data of high importance is included in network coded data of the layered video data of low importance.

The network coding may include network coding the SVC layered video data having a high priority based on the importance with a high priority.

The network coding step includes: decoding the SVC layered video data; Sorting the decoded SVC layered video data based on the importance; And a coding step of network coding by increasing transmission frequency by including more SVC layered video data having higher importance.

The alignment may include dividing the received SVC layered video data into a base layer and an enhancement layer according to importance.

The network coding step may include network coding the received SVC layered video data using an exclusive OR.

In the data transmission method, the source node, the relay node, and the destination node may wirelessly communicate through at least one of a multiple input multiple output (MIMO) system and a single input single output (SISO) system.

An apparatus for transmitting SVC layered video data through network coding according to the present invention for achieving the above object is an apparatus for transmitting scalable video coding (SVC) layered video data in a wireless network in which a source node, a relay node, and a destination node exist. A reception unit comprising: a receiver configured to receive SVC layered video data from the source node; A network coding unit for decoding the received SVC layered video data and network coding the data inclusion frequency according to importance; And a transmitter for transmitting the network coded data to the destination node.

The network coding unit may perform network coding so that the SVC layered video data having high importance is included in all the network coded data of the layered video data having low importance.

The network coding unit may network-code the SVC layered video data having a high priority based on the importance.

The network coding unit includes a decoding unit for decoding the SVC layered video data; An alignment unit to align the decoded SVC layered video data based on the importance level; And a coding unit configured to network-encode the transmission frequency by increasing the transmission frequency of the SVC layered video data.

The alignment unit divides the received SVC layered video data into a base layer and an enhancement layer according to importance.

The network coding unit may network code the received SVC layered video data using an exclusive OR.

The data transmission device may wirelessly communicate with the source node, the relay node, and the destination node through at least one of a multiple input multiple output (MIMO) system and a single input single output (SISO) system.

In order to achieve the above object, SVC layered video data through a network coding method of the present invention is the SVC (Scalable Video Coding) layered video data in a wireless network where a source node, a relay node and a destination node exists A method for receiving a data, the method comprising: receiving, from the relay node, network coded SVC layered video data at different data inclusion frequencies according to importance; And decoding the received SVC layered video data in consideration of the inclusion frequency according to the importance.

The decoding step may include decoding only the remaining undecoded data except the already decoded data having a high inclusion frequency due to the high importance in the received SVC layered video data.

An apparatus for receiving SVC layered video data through network coding according to the present invention for achieving the above object includes scalable video coding (SVC) layered video data of a destination node in a wireless network in which a source node, a relay node, and a destination node exist. An apparatus for receiving an apparatus, the apparatus comprising: a receiver configured to receive, from the relay node, network coded SVC layered video data at different data inclusion frequencies according to importance; And a decoder which decodes the received SVC layered video data in consideration of the inclusion frequency according to the importance.

Since the decoder has a high importance in the received SVC layered video data, the decoder may decode only the remaining undecoded data except the already decoded data having a high inclusion frequency.

According to the present invention, there is provided a method and apparatus for transmitting SVC layered video data through network coding, and a method and apparatus for receiving SVC layered video data. There is.

In addition, according to the method and apparatus for transmitting SVC layered video data through network coding, and the receiving method and apparatus, UEP can be provided to SVC layered video data without providing additional resources through network coding scheme, thereby providing video quality. You can expect a visible improvement.

1 is a view for explaining a concept of a SVC layered video data transmission method through network coding according to an embodiment of the present invention;
2 is a diagram illustrating a half-duplex method of an SVC layered video data transmission method through network coding according to an embodiment of the present invention;
3 is a diagram illustrating a full-duplex method of a SVC layered video data transmission method through network coding according to another embodiment of the present invention;
4 is a diagram illustrating a method of transmitting data by varying the data inclusion frequency according to the importance of the SVC layered video data transmission method through network coding according to an embodiment of the present invention;
FIG. 5 is a diagram illustrating two data sets being transmitted in the data transmission of FIG. 4; FIG.
6 is a flowchart schematically illustrating a method of transmitting SVC layered video data through network coding according to an embodiment of the present invention;
7 is a detailed flowchart illustrating a network coding step of an SVC layered video data transmission method through network coding according to an embodiment of the present invention;
8 is a block diagram schematically illustrating an apparatus for transmitting SVC layered video data through network coding according to an embodiment of the present invention;
9 is a detailed block diagram illustrating in detail a network coding unit of an SVC layered video data transmission apparatus through network coding according to an embodiment of the present invention;
10 is a flowchart schematically illustrating a method of receiving SVC layered video data through network coding according to an embodiment of the present invention;
11 is a block diagram schematically illustrating an apparatus for receiving SVC layered video data through network coding according to an embodiment of the present invention;
12 and 13 are graphs for comparing the performance of the SVC layered video data transmission method through network coding according to an embodiment of the present invention.

While the invention is susceptible to various modifications and alternative forms, specific embodiments thereof are shown by way of example in the drawings and will herein be described in detail.

It should be understood, however, that the invention is not intended to be limited to the particular embodiments, but includes all modifications, equivalents, and alternatives falling within the spirit and scope of the invention.

Terms such as first and second may be used to describe various components, but the components should not be limited by the terms. The terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as the second component, and similarly, the second component may also be referred to as the first component. And / or < / RTI > includes any combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being "connected" or "connected" to another component, it may be directly connected to or connected to that other component, but it may be understood that other components may be present in between. Should be. On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between.

The terminology used herein is for the purpose of describing particular example embodiments only and is not intended to be limiting of the present invention. Singular expressions include plural expressions unless the context clearly indicates otherwise. In this application, the terms "comprise" or "have" are intended to indicate that there is a feature, number, step, operation, component, part, or combination thereof described in the specification, and one or more other features. It is to be understood that the present invention does not exclude the possibility of the presence or the addition of numbers, steps, operations, components, components, or a combination thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the relevant art and are to be interpreted in an ideal or overly formal sense unless explicitly defined in the present application Do not.

Hereinafter, with reference to the accompanying drawings, it will be described in detail a preferred embodiment of the present invention. In order to facilitate the understanding of the present invention, the same reference numerals are used for the same constituent elements in the drawings and redundant explanations for the same constituent elements are omitted.

1 is a diagram illustrating a concept of a SVC layered video data transmission method through network coding according to an embodiment of the present invention. As shown in FIG. 1, a wireless communication network according to an embodiment of the present invention includes a source node 110, a relay node 120, and a destination node 130. The source node 110 transmits the same data to the relay node 120 and the destination node 130. The source node 110 may transmit using at least one of a broadcasting method, a multicasting method, and a unicasting method.

Referring to FIG. 1, the source node 110 transmits an SVC layered video data set consisting of a base layer BL, an enhancement layer 1 EL 1, and an enhancement layer 2 EL 2 to the relay node 120 and a destination. Send to node 130. The SVC video data 112 transmitted from the source node 110 to the relay node 120 includes data including one base layer BL, one enhancement layer 1 EL 1, and one enhancement layer 2 EL 2. Set, which is the same as the SVC video data 114 that the source node 110 sends to the destination node 130. However, in this case, when the data of the base layer BL is not transmitted, even if the enhancement layer 1 EL 1 and the enhancement layer 2 EL 2 which are subsequently transmitted are normally transmitted, they cannot be decoded. Therefore, the decoding rate of the base layer may be important above all.

To this end, the data transmission method of the present invention uses a network coding technique. That is, the relay node 120 performs network coding to decode and recombine the data set 112 received from the source node 110 to perform coding to increase the transmission frequency for important data and to decode the important data. Increase the video quality. As shown in FIG. 1, the relay node 120 decodes the data set 112 received from the source node 110, and then classifies the priority according to importance, and thus has a base layer BL having the most important priority. ) Is sent first by itself, and then when the enhancement layer 1 (EL 1) is sent, the base layer BL is sent in duplicate, and when the enhancement layer 2 (EL 2) is sent, the enhancement layer 2 (EL) is sent. Including the base layer BL and the enhancement layer 1 EL 1 having higher importance than 2), the base layer BL is three times, and the enhancement layer 1 EL 1 is two times, and the enhancement layer 2 ( EL 2) performs network coding so that the total is one time. The network coded data set 116 is transmitted to the destination node 130 to increase the transmission efficiency. In the case of the embodiment of Figure 1 is classified into a base layer and an enhancement layer, the enhancement layer is classified using two enhancement layers, but the number of classification is not limited to two as in this embodiment, 2 It may be more or less. That is, classification of data according to importance may be variously performed according to the importance. Importantly, the base layer BL, which is the most important data among the data, is included in all network coded packets and is transmitted once alone. Enhancement layer 1 (EL 1) is included in all network coded data, but is not transmitted alone.

2 is a diagram illustrating a half-duplex method of an SVC layered video data transmission method through network coding according to an embodiment of the present invention. As shown in FIG. 2, the source node 110 may include a data set consisting of a base layer BL, an enhancement layer EL 1, and an enhancement layer 2 EL 2 of a multiple input multiple output (MIMO) system. It may transmit to the relay node 120 and the destination node 130 through the channel. In this case, the relay node 120 may also transmit the data set to the destination node 130 through a channel of the MIMO system. Although not shown in the figure, it may be possible to communicate using a system other than the MIMO system (eg, Single Input Single Output (SISO)).

Referring to FIG. 2, as described above, the data set from the relay node 120 to the destination node 130 includes a packet including only the base layer BL, the base layer BL, and the enhancement layer EL 1. The packet includes three packets including the included packet, the packet including the base layer BL, the enhancement layer EL 1, and the enhancement layer 2 EL 2. Referring to the table 200 below, packets 1, 2 and 3 are data packets transmitted from the source node 110 to the relay node 120 and the source node 110 to the destination node 130, respectively. ), The enhancement layer EL 1 and the enhancement layer 2 EL 2 are transmitted one by one. Packets 4, 5, and 6 are packets sent from the relay node 120 to the destination node 130 and include only the base layer BL, packets including the base layer BL and the enhancement layer EL 1, and A packet including the base layer BL, the enhancement layer EL 1, and the enhancement layer 2 EL 2 is transmitted. This embodiment shows wireless communication through a half-duplex scheme. The source node 110 does not transmit another packet while packets 4, 5, and 6 are transmitted. Therefore, the actual data is transmitted only BL, EL 1, EL 2, that is, three data while six packets are transmitted.

3 is a diagram illustrating a full-duplex method of an SVC layered video data transmission method through network coding according to another embodiment of the present invention. As illustrated in FIG. 3, the source node 110 may include a data set including a base layer BL, an enhancement layer EL 1, and an enhancement layer 2 EL 2 of a multiple input multiple output (MIMO) system. It may transmit to the relay node 120 and the destination node 130 through the channel. In this case, the relay node 120 may also transmit the data set to the destination node 130 through a channel of the MIMO system. In addition, while the relay node 120 transmits the received data to the destination node 130, the source node 110 does not rest and transfers the next data set BL ', EL 1', EL 2 'to the relay node 120. FIG. ) And the destination node 130. This is different from half-duplex.

Referring to FIG. 3, as described above, the data set from the relay node 120 to the destination node 130 is enhanced with the packet including only the base layer BL and the base layer BL as in the case of FIG. 2. Three packets are sent, such as a packet including the enhancement layer EL 1 and a packet including the base layer BL, the enhancement layer EL 1, and the enhancement layer 2 EL 2.

Referring to the table 300 below, packets 1, 2 and 3 are data packets transmitted from the source node 110 to the relay node 120 and the source node 110 to the destination node 130, respectively. ), The enhancement layer EL 1 and the enhancement layer 2 EL 2 are transmitted one by one. Packets 4, 5, and 6 are packets sent from the relay node 120 to the destination node 130 and include only the base layer BL, packets including the base layer BL and the enhancement layer EL 1, and A packet including the base layer BL, the enhancement layer EL 1, and the enhancement layer 2 EL 2 is transmitted. While the relay node 120 sends packets 4, 5, 6, the source node 110 operating in full duplex transmits the base layer BL 'of the next data in packet 4, and packet 5 The enhancement layer 1 (EL 1 ′) is transmitted, and the enhancement layer 2 (EL 2 ′) is transmitted to the relay node 120 and the destination node 130 in the sixth packet. Therefore, the destination node can receive six data of BL, EL 1, EL 2, BL ', EL 1', and EL 2 'substantially for 6 packets, which provides good transmission efficiency compared to half-duplex. Have

4 is a diagram illustrating a method of transmitting data by varying the frequency of data inclusion according to the importance of the SVC layered video data transmission method through network coding according to an embodiment of the present invention. 4 illustrates a case where only one data set is present.

Referring to FIG. 4, the data set has a plurality of layers according to the importance of base layer BL and enhancement layer 1 EL 1 to N N. In this case, the base layer BL is transmitted once alone, and is included in all network coded data packets until the enhancement layer N EL N is sent. In the case of enhancement layer 1 (EL 1), all network coded data packets are transmitted in addition to the base layer BL packet. As such, the frequency of inclusion of data varies according to importance. Enhancement layer N-1 (EL N-1) is included when the enhancement layer N-1 (EL N-1) and enhancement layer N (EL N) are transmitted and are transmitted twice. The management layer N (EL N) is transmitted only once when it is finally transmitted. In order to minimize loss due to transmission failure, the enhancement layer N (EL N) having the lowest importance according to the importance of data is transmitted only once.

FIG. 5 is a diagram illustrating two data sets being transmitted in the data transmission of FIG. 4. As shown in FIG. 5, the two data sets are divided into layers having three importance levels: a base layer BL, an enhancement layer 1 EL 1, and an enhancement layer 2 EL 2.

Referring to FIG. 5, since all of the base layers are included during the first data set, base layer BL is three times, enhancement layer 1 (EL 1) is twice, and enhancement layer 2 (EL 2). Is sent only once. In transmitting another data set, the base layer BL 'is also included in all three packets, and thus is transmitted three times. The enhancement layer 1 (EL 1') is included in two packets. Enhancement layer 2 (EL 2 ′) is transmitted only once. In other words, the hierarchies are divided according to importance for each data set, and the frequency of inclusion of data is calculated for each data set, and the transmission frequency is changed according to the importance.

6 is a flowchart schematically illustrating a method of transmitting SVC layered video data through network coding according to an embodiment of the present invention. As shown in FIG. 6, in the data transmission method according to an embodiment of the present invention, in step 610 of receiving layered video data from a source node, the frequency of data inclusion according to importance by decoding the received layered video data. Network coding may be performed differently, and transmitting network coded data to a destination node 630.

Referring to FIG. 6, in a data receiving step 610, a data transmission device (not shown) receives SVC layered video data from a source node. The data transmission apparatus of the present invention has two antennas for transmitting and receiving reception. Therefore, it is possible to receive data transmitted from the source node through the receiving antenna.

Next, in the network coding step 620, the data transmission apparatus decodes the SVC layered video data received in the reception step 610. The network coding is performed by varying the frequency of inclusion of the decoded data according to importance.

7 is a detailed flowchart illustrating the network coding step 620 of the SVC layered video data transmission method through network coding according to an embodiment of the present invention. As shown in FIG. 7, the network coding step 620 according to an embodiment of the present invention includes the steps of decoding the SVC layered video data 710, and sorting the decoded SVC layered video data based on importance. Step 720 and network coding 730 to increase the frequency of transmission by including more data of high importance may be included.

Referring to FIG. 7, first, in a decoding step 710, the data transmission apparatus decodes the SVC layered video data received through the receiving step 610. Since the data transmission apparatus of the present invention does not simply store and forward the received data, but decodes and recombines the network coding, the data transmission apparatus performs the process of decoding the received data in step 710. Decoding performs decoding based on the manner encoded at the source node.

Next, in the sorting step 720, the data transmission apparatus sorts the data decoded in the decoding step 710 in priority order according to the importance. The sorting sorts the higher priority according to the higher priority. As described above, the type of the layer at the time of alignment includes the base layer BL and the enhancement layer EL. That is, the base layer BL is the most important layer and may be included in a packet that is transmitted alone as one data packet and subsequently network coded. The enhancement layer EL may be divided into several layers in some cases. That is, it can be classified from enhancement layer 1 (EL 1) to enhancement layer N (EL N).

Next, in the coding step 730, the data transmission apparatus performs network coding based on the sorted priority in the alignment step 720. In this case, the data should be coded to increase the transmission frequency by including a lot of data of a layer having a high priority. Unequal Error Protection (UEP) can be provided by varying the frequency of data inclusion according to priority in network coding. Also, by coding the layer with the highest priority first, it can be transmitted first. Here, when generating a new signal through network coding, it may be desirable to perform network coding using an exclusive OR.

6, after performing the network coding step 620, the data transmission apparatus transmits the network coded data to the destination node in the transmission step 630. The data transmission device basically transmits using a spatial multiplexing technique. As described above, each node has two antennas for transmitting and receiving. Therefore, the data transmission apparatus transmits the network coded data to the destination node using the transmission antenna.

8 is a block diagram schematically illustrating an apparatus for transmitting SVC layered video data through network coding according to an embodiment of the present invention. As illustrated in FIG. 8, the data transmission apparatus 800 may include a receiver 810, a network coding unit 820, and a transmitter 830.

Referring to FIG. 8, the receiver 810 receives SVC layered video data from a source node. The receiver 810 may receive data transmitted from a source node through a reception antenna for data reception.

Next, the network coding unit 820 decodes the SVC layered video data received by the receiving unit 810. The network coding is performed by varying the frequency of inclusion of the decoded data according to importance.

9 is a detailed flowchart illustrating the network coding unit 820 of the SVC layered video data transmission apparatus 800 through network coding according to an embodiment of the present invention. As shown in FIG. 9, the network coding unit 820 according to an embodiment of the present invention may include a decoding unit 910, an alignment unit 920, and a coding unit 930.

Referring to FIG. 9, first, the decoder 910 decodes SVC layered video data received through the receiver 810. Since the decoder 910 does not simply store and forward the received data, but decodes and recombines the network coding, the decoder 910 decodes the received data. Decoding performs decoding based on the manner encoded at the source node.

Next, the alignment unit 920 arranges the data decoded by the decoder 910 in priority order according to the importance. The sorting sorts the higher priority according to the higher priority. As described above, the type of the layer at the time of alignment includes the base layer BL and the enhancement layer EL. That is, the base layer BL is the most important layer and may be included in a packet that is transmitted alone as one data packet and subsequently network coded. The enhancement layer EL may be divided into several layers in some cases. That is, it can be classified from enhancement layer 1 (EL 1) to enhancement layer N (EL N).

Next, the coding unit 930 performs network coding based on the priority ordered by the alignment unit 920. In this case, the data should be coded to increase the transmission frequency by including a lot of data of a layer having a high priority. Unequal Error Protection (UEP) can be provided by varying the frequency of data inclusion according to priority in network coding. Also, by coding the layer with the highest priority first, it can be transmitted first. Here, when generating a new signal through network coding, it may be desirable to perform network coding using an exclusive OR.

8, after the network coding is performed by the network coding unit 820, the transmitter 830 transmits the network coded data to the destination node. The transmitter 830 basically transmits using a spatial multiplexing technique. As described above, the transmitter 830 transmits network coded data to a destination node by using a transmission antenna.

10 is a flowchart schematically illustrating a method of receiving SVC layered video data through network coding according to an embodiment of the present invention. As shown in FIG. 10, the method of receiving data according to an embodiment of the present invention includes receiving (1010) and receiving network coded SVC layered video data by varying the frequency of data inclusion according to importance from a relay node. Decoding the SVC layered video data in consideration of the inclusion frequency according to importance 1010 may include.

First, in a receiving step 1010, the data receiving apparatus receives network coded SVC layered video data received from a relay node. As described above, the data receiving apparatus also has two antennas for transmitting and receiving, and receives data by using the receiving antenna in the receiving step 1010. Since the received data is network coded, the frequency of inclusion of the data varies according to importance.

Therefore, in the decoding step 1020, it is necessary to decode the data received in the receiving step 1010 in consideration of the inclusion frequency according to the importance. In particular, since the base layer is included in all the network coded data, if the base layer has already been decoded at the time of decoding, decoding of the remaining undecoded portions other than the base layer should be performed in other network coded data. Otherwise, the base layer must be continuously decoded and the already decoded data must be decoded several times, resulting in a large amount of computation and poor decoding efficiency. In addition, since network coding is performed through an exclusive logical OR (XOR) during decoding, decoding should be performed in consideration of this. That is, it may be desirable to detect the signal by inversely exclusive ORing the network coded signal.

11 is a block diagram schematically illustrating an apparatus 1100 for receiving SVC layered video data through network coding according to an embodiment of the present invention. As shown in FIG. 11, the receiving device 1100 according to an embodiment of the present invention may include a receiving unit 1110 and a decoding unit 1120.

First, the receiver 1110 receives network coded SVC layered video data received from a relay node. As described above, the data receiving apparatus also has two antennas for transmitting and receiving, and receives data using the receiving antenna.

The decoder 1120 decodes the data received by the receiver 1110 in consideration of the frequency of inclusion according to importance. In particular, since the base layer is included in all the network coded data, if the base layer has already been decoded at the time of decoding, decoding of the remaining undecoded portions other than the base layer should be performed in other network coded data. Otherwise, since the data already decoded must be decoded many times, the calculation amount increases, and the decoding efficiency is not good.

In decoding, network coding is performed through an exclusive OR (XOR), and thus decoding should be performed in consideration of this.

12 and 13 are graphs for comparing the performance of the SVC layered video data transmission method through network coding according to an embodiment of the present invention. 12 is a graph showing the BER performance compared to the average SNR, Figure 13 is a graph showing the average PSNR performance compared to the average SNR. 12 and 13, it can be seen that BER performance is improved for each layer. In particular, in the case of the base layer, it can be seen that a larger performance gain can be obtained. On average, the performance gain is about 1.5dB. In addition, in the case of PSNR, overall performance improvement can be confirmed. In particular, in the case of the SNR 7 ~ 11 section, the PSNR performance improvement can be confirmed through the data transmission method of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit or scope of the inventions as defined by the following claims It will be understood that various modifications and changes may be made thereto without departing from the spirit and scope of the invention.

Claims (18)

In the wireless network where a source node, a relay node and a destination node exists, the relay node transmits scalable video coding (SVC) layered video data,
A receiving step of receiving SVC layered video data from the source node;
A network coding step of decoding the received SVC layered video data and network coding the data inclusion frequency according to importance; And
And transmitting the network coded data to the destination node.
The method of claim 1, wherein the network coding step
And network coding the SVC layered video data of high importance to be included in network coded data of the layered video data of low importance.
The method of claim 1, wherein the network coding step
And network coding the SVC layered video data having a high priority based on the importance at a high priority.
The method of claim 1, wherein the network coding step
A decoding step of decoding the SVC layered video data;
Sorting the decoded SVC layered video data based on the importance; And
SVC layered video data transmission method using network coding, comprising the step of network coding by increasing the transmission frequency by including more SVC layered video data of higher importance.
The method of claim 4, wherein the alignment step
And dividing the received SVC layered video data into a base layer and an enhancement layer according to importance, and sorting the received SVC layered video data.
The method of claim 1, wherein the network coding step
And network coding the received SVC layered video data using an exclusive OR (XOR operation).
The method of claim 1,
The source node, the relay node, and the destination node are wirelessly communicated through at least one of a multiple input multiple output (MIMO) system and a single input single output (SISO) system. Data transfer method.
An apparatus for transmitting scalable video coding (SVC) layered video data in a wireless network in which a source node, a relay node, and a destination node exist.
A receiver configured to receive SVC layered video data from the source node;
A network coding unit for decoding the received SVC layered video data and network coding the data inclusion frequency according to importance; And
And a transmitter configured to transmit the network coded data to the destination node.
The method of claim 8, wherein the network coding unit
And network coding the SVC layered video data having high importance to be included in network coded data of the layered video data having low importance.
The method of claim 8, wherein the network coding unit
The SVC layered video data transmission apparatus using network coding, wherein the SVC layered video data having a high priority is network-coded based on the importance.
The method of claim 8, wherein the network coding unit
A decoder which decodes the SVC layered video data;
An alignment unit to align the decoded SVC layered video data based on the importance level; And
The SVC layered video data transmission apparatus using network coding, characterized in that the SVC layered video data having a higher degree of importance includes a coding unit to increase the frequency of transmission by including more.
The method of claim 11, wherein the alignment unit
And sorting the received SVC layered video data into a base layer and an enhancement layer according to importance.
The method of claim 8, wherein the network coding unit
And network coding the received SVC layered video data using an exclusive OR.
The method of claim 8,
The source node, the relay node, and the destination node are wirelessly communicated through at least one of a multiple input multiple output (MIMO) system and a single input single output (SISO) system. Data transmission device.
A method for receiving, by a destination node, scalable video coding (SVC) layered video data in a wireless network in which a source node, a relay node, and a destination node exist.
A receiving step of receiving, from the relay node, network coded SVC layered video data with different data inclusion frequencies according to importance; And
And decoding the received SVC layered video data in consideration of the inclusion frequency according to the importance level.
The method of claim 15, wherein the decoding step
And decoding only the remaining undecoded data except the already decoded data having a high inclusion frequency due to the high importance in the received SVC layered video data. How to receive video data.
An apparatus for receiving scalable video coding (SVC) layered video data of a destination node in a wireless network in which a source node, a relay node, and a destination node exist.
A receiving unit for receiving, from the relay node, network coded SVC layered video data at different data inclusion frequencies according to importance; And
And a decoder which decodes the received SVC layered video data in consideration of an inclusion frequency according to the importance.
18. The apparatus of claim 17, wherein the decoding unit
SVC layered video data receiving apparatus using network coding, which has only a high degree of importance in the received SVC layered video data and thus decodes only the remaining undecoded data except the decoded data having a high inclusion frequency. .
KR1020110127316A 2011-11-30 2011-11-30 Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding KR20130060976A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
KR1020110127316A KR20130060976A (en) 2011-11-30 2011-11-30 Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
KR1020110127316A KR20130060976A (en) 2011-11-30 2011-11-30 Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding

Publications (1)

Publication Number Publication Date
KR20130060976A true KR20130060976A (en) 2013-06-10

Family

ID=48859299

Family Applications (1)

Application Number Title Priority Date Filing Date
KR1020110127316A KR20130060976A (en) 2011-11-30 2011-11-30 Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding

Country Status (1)

Country Link
KR (1) KR20130060976A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101588549B1 (en) * 2015-01-09 2016-01-26 이화여자대학교 산학협력단 Tcp based network routers supporting network coding and tcp based data streaming system using network coding
WO2016144041A1 (en) * 2015-03-09 2016-09-15 한국항공우주연구원 Packet encoding device and method
US10122503B2 (en) 2015-03-09 2018-11-06 Korea Aerospace Research Institute Apparatus and method for coding packet
EP4199404A4 (en) * 2020-09-08 2023-10-25 Huawei Technologies Co., Ltd. Encoding method and apparatus

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101588549B1 (en) * 2015-01-09 2016-01-26 이화여자대학교 산학협력단 Tcp based network routers supporting network coding and tcp based data streaming system using network coding
WO2016144041A1 (en) * 2015-03-09 2016-09-15 한국항공우주연구원 Packet encoding device and method
US10122503B2 (en) 2015-03-09 2018-11-06 Korea Aerospace Research Institute Apparatus and method for coding packet
EP4199404A4 (en) * 2020-09-08 2023-10-25 Huawei Technologies Co., Ltd. Encoding method and apparatus

Similar Documents

Publication Publication Date Title
EP1402673B1 (en) Transmission method and apparatus in a radio communications network
US9130712B2 (en) Physical channel segmentation in wireless communication system
KR101096309B1 (en) Apparatus and method for rate matching to maintain code block resource element boundaries
US20080019308A1 (en) Reception of data with adaptive code rate over wireless network
CN107040334B (en) Method, apparatus, and computer-readable medium for device-assisted communication
WO2004030264A1 (en) Transmission system
CN113055285B (en) Self-adaptive data transmission method based on MPTCP and network coding
KR20130060976A (en) Scalable video coding layered video data transmission method and apparatus, and reception method and apparatus using network coding
KR101319878B1 (en) Method For Indicating The Combination Of Codeward And Stream In The MIMO Communication System
WO2007004285A1 (en) Wireless communication method, wireless transmitter and wireless receiver
CN103986932A (en) Message source channel combined encoding and decoding method for video data stream
El Gamal et al. An algebraic number theoretic framework for space-time coding
Colda et al. Content-based image unequal error protection strategies for an open loop MIMO system
Razzaq et al. Layered video transmission using wireless path diversity based on grey relational analysis
US20230030044A1 (en) Data processing method, apparatus, and device
EP1497944B1 (en) Diagonally layered multi-antenna transmission for frequency selective channels
US9154849B2 (en) Apparatus for providing multimedia services and method thereof
Dekorsy A cutoff rate based cross-layer metric for MIMO-HARQ transmission
CN101895478B (en) Quality of service (QoS)-based scheduling method for multi-user multiple input multiple output (MIMO) system
KR101265596B1 (en) Method and Apparatus For Transmitting ACK/NACK In Multiple Codeword Type MIMO Wireless Communication System
CN104394414B (en) Video transmission method for the space-time block code differential Chaos Shift Keying of scalable video coder
Lin et al. Joint source and space-time block coding for MIMO video communications
Tchamkerten et al. On the use of training sequences for channel estimation
KR101319876B1 (en) Method For Indicating The Combination Of Codeward And Stream In The MIMO Communication System
CN101176353B (en) Decoder architecture for optimized error management in streaming multimedia

Legal Events

Date Code Title Description
A201 Request for examination
E902 Notification of reason for refusal
E90F Notification of reason for final refusal
E601 Decision to refuse application