KR20090039583A - Internet network system and method for transferring data using the same - Google Patents

Abstract

An internet network apparatus and a data communications method using a transmission quantity determining unit for especially measuring data capacity transmitted by a client are provided to transmit data between a server and a client by controlling input data capacity. An encoder(110) codes original data. The encoder produces communications unit input data. A communication unit(120) transmits an application layer(121), a transport layer(122), an IP(Internet Protocol) layer(123) and a connecting network layer(124) to the client. A transmission quantity determining unit compares the communications unit input data and communication unit output data outputted from the communications unit transmitted through the transport layer. According to the determination of the transmission quantity determining unit, a transmission quantity controller controls encoder.

Description

Internet network system and method for transferring data using the same}

The present invention relates to an internet network device capable of transmitting data to a client, in particular a plurality of clients, via a network, and a data transmission method using the same.

In an Internet network device consisting of a server having various program files and data on a network and a client connected to the network, data transmission between the server and the client must be made accurately and quickly.

As described above, in order to normally transmit data between a server and a client, it is important to understand the capacity of the data delivered in real time. Especially, when one data is transmitted to a plurality of clients, the amount of data transmitted to each client depends on network conditions. It may vary, so it is necessary to measure the amount of data sent per client for maximum normal data transfer to all clients.

An object of the present invention is to provide an internet network device capable of smoothly transmitting data by accurately determining an amount of data transmission to a client through a network and a data transmission method using the same.

In addition, the present invention, even when transmitting a single data to a plurality of clients, the Internet network device capable of accurately determining the amount of data transmitted to each client to transmit the optimal normal data to the client and a data transmission method using the same To provide.

The present invention provides an encoder for generating communication unit input data by coding raw data, a communication unit for sequentially transmitting the communication unit input data to the client through an application layer, a transport layer, an IP layer, and a network connection layer, and the communication unit input. A transmission amount determination unit for comparing and comparing data with at least one communication unit output data output from the communication unit transmitted through the transport layer or client input data transmitted to at least one client, and the encoder according to the determination of the transmission amount determination unit. Provided is an internet network device comprising a transmission amount control unit for controlling.

In the Internet network device of the present invention, the transmission amount determining unit comprises a first measuring unit measuring the communication unit input data, a second measuring unit measuring the communication unit output data or the client input data, and the first measuring unit And a determination unit comparing and determining data measured by the second measurement unit. In the Internet network device, the raw data may be image data. In the Internet network apparatus, the transmission control unit may control the encoder to adjust any one selected from the group consisting of frame rate, bit rate, and resolution of the image data according to the transmission amount determining unit. In the Internet network apparatus, when the transmission determination unit determines that the second data measured by the second measurement unit is smaller than the first data measured by the first measurement unit, the transmission control unit reduces the frame rate. The bit rate may be reduced or the resolution of the image data may be reduced.

In the Internet network device of the present invention, the transmission amount determining unit is a first measuring unit for measuring the input data of the communication unit, a second measuring unit for measuring the input data of at least one client, and the average of the input data of the client The calculator may include a calculation unit configured to calculate and a determination unit configured to compare and determine input data provided from the first measurement unit and an average provided from the calculation unit. The data may be image data. In the Internet network device, the calculator may add a correction value to the average to generate an average approximation value, and the determination unit may compare the input data with the average approximation value. In the Internet network apparatus, the transmission control unit may control the encoder to adjust any one selected from the group consisting of frame rate, bit rate, and resolution of the image data according to the transmission amount determining unit. If the transmission rate determination unit determines that the second data provided from the calculation unit is smaller than the first data measured by the first measurement unit, the transmission control unit reduces the frame rate, reduces the bit rate, or The resolution of the image data can be reduced.

In the Internet network device of the present invention, the communication unit includes a ring buffer for temporarily storing the communication unit input data in an application layer, an input control unit for controlling the data storage, and an output control unit for controlling the output of the stored data. can do.

In the Internet network device of the present invention, the input control unit may control storing data in the ring buffer according to an input pointer, a ring buffer capacity, and a previously stored data capacity.

In the Internet network device of the present invention, the output control unit may control reading data from the ring buffer according to an output pointer, frame order information of the last image, and the order determination.

In the Internet network device of the present invention, the client may have a unique output pointer Pout. Therefore, when a plurality of clients are connected to the Internet network device, each client may receive communication unit input data output from the ring buffer separately. Since the input pointer and the output pointer which designate a position to copy the communication unit input data to the ring buffer are controlled separately, the ring buffer can be operated as one input and multiple outputs.

Also, the present invention inputs raw data, encodes the raw data, inputs encoded data to a communication unit, and sequentially transfers the data through an application layer, a transport layer, an IP layer, and a network connection layer of the communication unit. A data transmission method of an internet network device for transmitting to at least one client, the method comprising: measuring capacity of communication unit input data input to the communication unit; and communication unit output data output from the communication unit, transmitted through at least the transport layer Or measuring the capacity of client input data transmitted to the client, comparing and comparing the measured capacity of the communication unit input data with the communication unit output data or the client input data, and performing the encoding according to the determination result. Control Provides a method of transmitting data on the Internet network, the device comprising. The data may be image data. In the data transmission method, when the communication unit output data or the client input data is larger than the communication unit input data, the raw data may be encoded to reduce the frame rate, reduce the bit rate, or reduce the resolution. Can be.

The data transmission method of the present invention may further include calculating an average of input data of a plurality of clients, and comparing and determining the average of the communication unit input data and the client input data. The data may be image data, wherein when the average of the client input data is larger than the communication unit input data, the raw data may be encoded to reduce the frame rate, reduce the bit rate, or reduce the resolution. Can be.

The data transmission method of the present invention may further include calculating an average approximation value by adding a correction value to the average, and comparing and determining an average approximation value of the communication unit input data and the client input data. The data may be image data, and when the average approximation of the client input data is larger than the communication unit input data, the raw data may be encoded to reduce the frame rate, reduce the bit rate, or reduce the resolution. Can be.

The data transmission method of the present invention comprises storing the plurality of encoded communication unit input data in a ring buffer according to an input pointer, a ring buffer capacity and already stored data capacity, an output pointer, frame order information of the last image, and the sequence. The method may include reading data stored in the ring buffer according to the determination.

As described above, the present invention can accurately determine the data transmission amount between the server and the client by determining the data capacity transmitted through at least the transport layer of the communication unit. Specifically, by comparing and determining the measured communication unit input data and output data (communication unit output data or client input data), the input data capacity is adjusted to be equal to the output data capacity when the data capacity input to the client is small, that is, when the overload is applied. This allows for the smooth transfer of desired data between the server and the client.

In addition, the present invention provides a single input multi output (SIMO) ring buffer in the application layer of the communication unit that allows the clients to receive data separately from each other by using a unique output pointer of each client, so that a single data can be In the transmission to the clients, the amount of data transmission to each of the clients can be determined separately, and the optimal normal data can be transmitted to all the clients by controlling the encoding based on this.

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

1 is a diagram schematically showing an internet network device according to the present invention. In this embodiment, the image data generated by the server is transmitted to a plurality of clients through many-to-one heterogeneous communication through a network. The Internet network device according to the present invention corresponds to a server in FIG. However, the present invention is not limited thereto, and when a digital video record (DVR) or an IP (Internet protocol) camera can directly communicate with the Internet, a digital image processing device such as a DVR or an IP camera may also be an Internet network device claimed in the present invention. .

Specifically, FIG. 1 stores image data input from the DVR 10 or the digital camera 11 in the server 100, and stores the image data stored in the server 100 in a plurality of clients 200, 210, An internet network device provided at 220 and 230 is shown.

In the present embodiment, the transmission of image data is illustrated, but the present invention is not limited thereto, and transmission of text data, audio data, and the like may also be included in the present invention.

The server 100 measures the capacity of the encoded data. Measure the data volume output from the communication unit or data input to the client together and compare them. The encoding of the data is controlled according to the determination result so that the data transmission can be performed more smoothly.

In addition, in the present invention, when a plurality of clients 200, 210, 220, and 230 are connected to the server 100, a unique data output pointer Pout included in each of the clients 200, 210, 220, and 230. Since the data is taken for each of the clients 200, 210, 220, and 230, the amount of data transmitted for each client may be measured, and the method of encoding the input data may be controlled based on the data.

Hereinafter, the server 100, which is an embodiment of the Internet network device of the present invention, will be described in detail with reference to FIG. 2.

When the raw data is input to the server 100, the encoder 110 of the server 100 encodes the raw data. The encoded data is transmitted to the communication unit 120. The encoded data is called communication unit input data. If the data is video data, specifically, video data, the MPEG-4 encoding method may be used.

Encoded data exchanges data according to hierarchical communication protocol between server and client. Accordingly, the communication unit 120 exchanges data with the clients 200 and 210 according to a communication protocol divided into the application layer 121, the transport layer 122, the IP layer 123, and the network connection layer 124. .

In detail, each of the layers exchanges information with corresponding layers of the clients 200 and 210, respectively. The application layer 121 exchanges information with the application layers 201 and 211 of each of the clients 200 and 210. The application layer 121 is a layer for transmitting data according to a user application.

The transport layer 122 maintains a reliable transmission state for data transmitted from the application layer 121. In the transport layer 122, a message to be transmitted is converted into a segment. In addition, the transport layer 122 corrects the error and indicates that information is transmitted.

The IP layer 123 exchanges packets over a network between communication dedicated processors. That is, the server 100 establishes and maintains the connection between the clients 200 and 210 and selects and manages all addressing, routing, and network functions. Therefore, if the connection between nodes is broken or repaired, it is also performed.

The network connection layer 124 transmits control signals for synchronizing transmissions, control signals for connection, communication and disconnection, signals for reconciling data with a communication medium, and the like.

In the present invention, the communication unit output data or the client input data means at least data through the transport layer 122. Accordingly, the present invention measures the data capacity packed with control data, such as a TCP header, at least through the transport layer 122 of the server 100.

In detail, the transmission amount determining unit 130 not only measures the capacity (communication unit input data) of the data input to the communication unit 120, but also communicates the data of the data transmitted through the transport layer 122. Dose is also measured. That is, the capacity of the communication unit output data or client input data is measured. In the conventional transport data capacity, the data capacity transmitted from the application layer to the transport layer is determined, that is, the data capacity transmitted from the application layer is determined, and the input data capacity is controlled based on this. The measured data capacity may be different from the data capacity actually input to the client, thus making it difficult to accurately determine the amount of transmission. However, in the present invention, the data transmission amount can be measured more accurately by measuring at least the capacity of the data transmitted through the transport layer and judging it based on this. The transport layer 122 detects data loss and performs correction and sequential recombination. The control layer 122, which is packed in the transport layer 122, that is output from the communication unit or the client by using a TCP header It is possible to accurately determine the input data transmission amount.

Accordingly, the transmission amount determining unit 130 monitors the control data TCP header packed through at least the transport layer 122 of the server 100 and outputs the data capacity or the clients 200 and 210 from the communication unit 120. Measure the amount of data entered into each. The capacity of the first client input data input to the first client 200 and / or the capacity of the second client input data input to the second client 210 may be measured, respectively.

More specifically, the transmission amount can be accurately determined using the Syn / Ack structure. Since the communication unit 120 synchronizes the synchronization with the size of the currently transmitted data (Syn) and the size of the transmitted data (Ack), the communication unit 120 may monitor the two transmission / reception values to determine the transmission amount. In this case, when a plurality of clients are connected, the Ack values received for each client may be summed, then averaged by the number of connected clients, and then the transmission amount may be calculated. In addition, a correction value may be added to the average to obtain a client input data capacity.

The transmission amount determining unit 130 compares the capacities of the communication unit input data and the communication unit output data with each other. Or compares the communication unit input data with the capacity of the client input data or an average of input data of a plurality of clients.

By transmitting the control signal according to the result of the comparison determination of the transmission amount determination unit 130 to the transmission control unit 140, the transmission control unit 14 controls the encoder 110 to change the encoding method or setting conditions of the raw data, etc. do. Therefore, the data transfer amount is controlled.

If the transmission capacity determination unit 130 determines that the capacity of the communication unit output data or the client input data is smaller than that of the communication unit input data, it is determined that the data transmission is overloaded, so that the control unit reduces the capacity of the input data. can do. For example, in the case of video data, the resolution, frame rate, bit rate, etc. may be adjusted and controlled.

3 is a block diagram illustrating an example embodiment of a transmission amount determining unit of a server of the Internet network apparatus illustrated in FIG. 2.

The transmission amount determining unit 130a according to the present embodiment includes a first measuring unit 131 measuring the communication unit input data, a second measuring unit 132a measuring the communication unit output data or the client input data, and the first measuring unit. And a determination unit 135a for comparing and determining the data measured by the second measurement unit 132a with each other.

The first measurement unit 131 may periodically calculate the packet size of the communication unit input data input for each channel from the encoder (110 of FIG. 2) and calculate statistics.

The second measurement unit 132a monitors a TCP header of a client input data packet on a network transmission line connected to the client, and identifies a source address, a destination address, and a program for performing a communication operation from the TCP header. A port number to be transmitted, a sequence number to indicate how many bytes of data to be transmitted at the head of the packet to transmit, and an ACK to indicate to which byte the data has been received. By analyzing the Acknowledgment numbers and calculating them, we can measure the throughput periodically.

Alternatively, the second measurement unit 132a may measure the packet size of the communication unit output data of the communication unit (120 of FIG. 1) using at least the control data packed through the transport layer (122 of FIG. 2).

Data values measured by the first measurement unit 131 and the second measurement unit 132a are transmitted to the determination unit 133, and the determination unit 135a compares the data values.

Specifically, when the communication unit output data or the client input data is different from the communication unit input data, the determination unit 135a generates a control signal corresponding thereto, and transmits the control signal to the transmission amount control unit (140 in FIG. 2). To transmit. The transmission control unit 140 controls the encoder (110 of FIG. 2) to generate the communication unit input data having the same capacity as the communication unit output data or the client input data capacity.

As another embodiment of the transmission amount determination unit 130b, it will be described with reference to FIG. 4. In the present embodiment, a transmission amount determination unit 130b that determines a transmission amount when a plurality of clients are connected is illustrated. Since the same reference numerals as those of FIG. 3 are the same components, the description of FIG. 4 will be mainly focused on differences from FIG. 3.

The transmission determining unit 130b according to the present embodiment includes a first measuring unit 131 measuring communication unit input data, a second measuring unit 132b measuring each input data of a plurality of clients, and the second measurement. The calculator 133 may calculate an average or an approximation of average values of the input data of the clients provided from the unit 132b, and a determination unit 135b for comparing and determining the data.

When a plurality of clients are connected, the second measurement unit 132b may measure each client input data.

The calculator 133 calculates an average by adding the client input data provided from the second measurement unit 132b. For example, if 100 bytes are produced per second, 80 bytes are transmitted to the first client, and 40 bytes are transferred to the second client, the average transfer amount will be 60 bytes. Although the transmission amount can be determined and controlled using the average calculated as described above, the transmission amount determination and control can be executed using an average approximation value that substantially adds a predetermined correction value to the average.

For example, if an average of 60 bytes of data is sent to the client, the transfer rate is 60%. The predetermined approximation value 6 is added to calculate an average approximation 66%. The reason why the correction value is further included is that if the communication unit directly adjusts the capacity of the input data to 60% according to the successful transmission amount of 60 bytes, the correction value is used because it is too sensitive to network changes.

More specifically, the reason for selecting the correction value of 6 is that it is difficult to adjust the amount of transmission in units of 100 on the code actually written, and then divides it into units of 10 again. Therefore, the initial calculated correction value is divided by 10. If the correction value is 57%, the final correction value is 57/10 = 5, and since the actual 57% is closer to 60%, (57 + 6) / 10 6 was chosen to round up by making = 6.

The determination unit 135b determines the average or average approximation provided from the calculator 133 and the size of the communication unit input data provided from the first measurement unit 131. If the average and the size of the communication unit input data are different, or if the average approximation value and the size of the communication unit input data are different, the control signal corresponding thereto is transmitted to the transmission controller (140 in FIG. 2).

Such a transmission control unit (140 of FIG. 2) will be described in more detail with reference to FIG. In the present embodiment, in the case of image data, the transmission amount control unit 140 controlling the capacity of the image data is illustrated.

The transmission control unit 140 may include at least one of the resolution control unit 141, the frame rate control unit 142, and the bit rate control unit 143.

Since the capacity of the image data varies depending on the resolution, it may include a resolution control unit 141 for adjusting the resolution by a method of changing the capacity. Therefore, when the communication unit input data and the communication unit output data or the client input data are different in the determination unit (135a of FIG. 3 or 135b of FIG. 4), the resolution may be adjusted to be the same. When a plurality of clients are connected, the average of the input data of the clients and an average approximation obtained by adding the correction value may be compared with the size of the communication unit input data. For example, if the communication unit output data or the client input data has a smaller capacity than the communication unit input data, the data communication is overloaded, so the capacity should be reduced. Alternatively, when the plurality of clients are connected, the capacity of the communication unit input data may be reduced when the average or average approximation value is smaller than the communication unit input data. That is, the encoder should be adjusted to generate communication unit output data, client input data, and communication unit input data having a capacity equal to the average or the average approximation. Therefore, in encoding the raw data, the encoder (110 of FIG. 2) is controlled to have a resolution lower than the current resolution.

The frame rate control unit 142 may adjust the capacity of the moving picture data by adjusting the frame rate corresponding to the number of frames transmitted per second in the moving picture data consisting of a plurality of frames. If capacity is to be reduced, frame rate will be reduced. If capacity is to be increased, frame rate should be increased.

The bit rate control unit 143 may also control the data capacity. For example, the bit rate may be reduced when the data capacity is to be reduced, and the capacity may be changed by increasing the bit rate when the capacity is to be increased. This is a general method, and bit bit control will be described later in more detail with reference to FIG. 10.

When one data is transmitted to the plurality of clients 200 and 210, the clients 200 and 210 may be separately transmitted by the ring buffer described later in FIG. 6. Therefore, the data capacity transmitted to each of the clients 200 and 210 may be measured, and the data transmission amount may be controlled by comparing and determining the data capacity input thereto.

In this case, the data capacity transmitted to each of the clients 200 and 210, that is, an average of client input data capacities are calculated, and when the average is different from the communication unit input data capacity, the communication unit input is equal to the communication unit input data capacity. Data capacity can be controlled. That is, the encoding method may be controlled to be equal to the average or smallest client input data capacity.

Alternatively, when encoding raw data separately to each client or performing the same encoding for each client grouped in a predetermined group, the average of the data capacities input to the clients or the group capacities. The communication unit may control the input data capacity to be equal to. That is, the encoding method of the raw data can be controlled for each client.

FIG. 6 is a block diagram illustrating a process of temporarily storing and transmitting data to a ring buffer having one input and a plurality of outputs in relation to data transmission in the Internet network device shown in FIG. 2.

Referring to FIG. 6, the application layer 121 of the communication unit 120 includes an input controller 121a, a ring buffer 121b, and a plurality of output controllers 121c and 121d.

Data input for each channel through the input control unit 121a is input to the ring buffer 121b, and the client reads data recorded in the ring buffer 121b through the output control units 121c and 121d. The data is data provided from the encoder.

The ring buffer 121b operates one for each channel, and has a client-specific output pointer (Pout) connected thereto, thereby applying and operating an automatic traffic control (ATC) algorithm for each client. That is, the ring buffer 121b operates asynchronously in outputting input data, and may process an image in real time because the input speed and the output speed are not affected by each other. In addition, penalizing clients with too slow transmission speeds prevents them from taking images that do not affect other video input and output operations.

The input controller 121a temporarily stores data in the ring buffer 121b in a clockwise direction. At this time, if the ring buffer 121b is turned around and there is no more area to store the data, the old data is deleted and the current data is stored. Therefore, there is always data to be transmitted in the ring buffer 121b as a whole. If stored in the clockwise direction, the data can be output at any time.

The input control unit 121a will be described in more detail with reference to FIG. 7.

The input control unit 121a is a ring buffer based on a current input pointer Pin which is information on a location where data can be stored, a maximum capacity of data that can be stored in the ring buffer 121b, and a variable of capacity of data that is already stored. It is possible to control that data is stored in 121b.

Specifically, in the ring buffer 121b illustrated in FIG. 6, the data is stored in the clockwise direction in advance in the input pointer of X1, so that the input pointer capable of storing the current data is X2, and the data may be stored in the ring buffer 121b. The capacity has a input pointer as Y and the data capacity already stored as Z. Therefore, the current data can store Y-Z capacity data in the clockwise direction from the X2 input pointer.

The operation of outputting data from the ring buffer 121b will be described below. When initially connected to the ring buffer 121b, the data is taken with the first data as a pointer. The first client takes the data clockwise from the output pointer of X1 through the first output control unit 121c. At this time, it is determined whether the order of the currently output data is the order after the last transmitted data according to the order information of the data previously transmitted. If the following order is correct, data may be transmitted to the first client. The second client may read data through the second read control unit 121d.

Such an output operation may be performed by the output controllers 121c and 121d. In order to conceptually show that the output operation is individually performed to the clients, the two output controllers 121c and 121d are divided to correspond to each client. However, since the output operation of the output control units 121c and 121d is performed by the same principle, only the first output control unit 121c is specifically illustrated in FIG. 8. Accordingly, the second output controller 121d also has the same structure as the first output controller 121c shown in FIG. 8.

Referring to FIG. 8, the first output controller 121c may store an output pointer and an order of the last transmitted data. The order determining unit may determine whether the order of data to be transmitted is next to the data transmitted last.

When the data is image data, the output control unit 121c stores the frame order of the image data that was last transmitted, and may determine whether the frame order of the image data to be transmitted currently is the previous or next order. The reason for confirming the order in this way is that the ring buffer 121b is given priority to the input. Because the old data can be erased and changed to the latest data, you need to make sure that the data pointed to by the output pointer is in line with the data you are currently transferring. For example, a client with a slow frequency bandwidth may be caught by an input pointer and thus may not be able to transmit data in order. Therefore, it is necessary to remember the order of the last transmitted frame.

Since the output pointer may be provided for each client, the output pointers may not affect the output operation of each other.

Accordingly, as illustrated in FIG. 6, each output control unit may be conceptually provided for each client. For example, the first client may have a first output controller 121c and the second client may have a second output controller 121d.

As discussed above, the ring buffer according to the present embodiment is a useful buffering technique when transmitting one data to multiple clients. In particular, in measuring the client input data in the transmission determination unit (130 of FIG. 2), since data is transmitted from the ring buffer based on output pointer information unique to each client, data input to each client is measured separately. can do. In addition, by measuring the amount of data transmission for each client and comparing their average or average approximation value with the communication unit input data capacity, encoding may be controlled according to the average or average approximation value if different. Alternatively, the encoding can be controlled for the smallest client input data capacity.

9 is a flowchart illustrating a data transmission method using an internet network device according to the present invention. This embodiment illustrates a data transmission method when a plurality of clients are connected.

Referring to FIG. 9, first, raw data is input (S100), and the raw data is encoded (S200).

The encoded data is input to the communication unit of the server (S300), and the data is temporarily stored in a ring buffer of the communication unit (S400).

Output the data from the communication unit (S500), and transmits the data to each of the clients (S600).

In this case, the capacity of the communication unit input data input to the communication unit in step S300 is measured separately from the data transmission step (S310).

In step S500, the capacity of the communication unit output data output from the communication unit is measured (S510). Or in step S600 measures the capacity of the client input data transmitted to each of the client (S610). The mean or average approximation of the plurality of client input data is calculated. Here, the average approximation value is obtained by adding a predetermined correction value to the average. In addition, the capacity of the communication unit output data or the client input data is at least a data capacity transmitted through the transport layer of the communication unit. Accordingly, the capacity of the communication unit output data or the client input data is measured using a TCP header which is control data packed in a transport layer.

The measured data as described above are compared to each other. In more detail, it is determined whether the communication unit input data capacity and the communication unit output data capacity or the communication unit input data capacity and the client input data capacity (when the client is a single number), or the communication unit input data capacity and the profit average or the average approximation are the same (S620). .

As a result of the determination, if the data capacities to be compared are different from each other, the encoding is controlled to be equal to the input data capacity of the communication unit (S630). For example, when the raw data is image data, if the communication unit output data and the client input data capacity are smaller than the communication unit input data, the average or average approximate capacity, the resolution of the communication unit input data may be reduced or the frame rate may be reduced. Encoding may be controlled in a direction of reducing bit or bit rate to have the same capacity as the communication unit output data or client input data.

If the capacities are the same, the current encoding state may be maintained (S640).

Referring to FIG. 10, a method of controlling encoding by adjusting bit rate will be described in detail when the communication unit output data, the client input data capacity, and the average or average approximation value are different from the communication unit input data capacity.

The lower the frame rate is, the larger the bit rate is. Therefore, the relationship between the bit rate and the frame rate is shown in a plurality of graphs in FIG. 7 by using various samples. Each of the graphs shows the relationship between bitrate adjustments according to transfer rates.

For bit rate adjustment, first, a graph corresponding to the frame rate may be selected, and a bit rate adjustment value corresponding to a transmission rate reduction amount may be obtained from the selected graph. In FIG. 7, the graph a is 30-20 in the frame rate, the graph b is 19-10, the graph c is 9-5, and the graph d is 4-1.

For example, if the frame rate is 25, a graph is selected, and if the transmission rate is reduced from 4.5 to 3.5, it may be determined that the bit rate is reduced by about 10%. The transmission rate may be expressed as a data transmission capacity against time.

Although the present invention has been described with reference to the embodiments shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent other embodiments are possible. Therefore, the true technical protection scope of the present invention will be defined by the technical spirit of the appended claims.

1 is a diagram schematically showing an internet network device according to the present invention.

2 is a block diagram illustrating an internet network device according to the present invention.

FIG. 3 is a block diagram illustrating an embodiment of a transmission amount determining unit of the Internet network device shown in FIG. 2.

FIG. 4 is a block diagram for explaining another embodiment of the transmission amount determining unit of the Internet network device shown in FIG. 2.

FIG. 5 is a block diagram illustrating a transmission amount control unit of a server of the Internet network device shown in FIG. 2.

FIG. 6 is a block diagram illustrating a process of temporarily storing and transmitting data to a ring buffer having one input and a plurality of outputs in relation to data transmission in the Internet network device shown in FIG. 2.

FIG. 7 is a block diagram illustrating the input control unit shown in FIG. 6.

FIG. 8 is a block diagram illustrating the output control unit shown in FIG. 6.

9 is a flowchart illustrating a data transmission method using an internet network device according to the present invention.

FIG. 10 is a graph illustrating a method of controlling encoding by adjusting a bit rate as an embodiment of step S630 in the flowchart of FIG. 9.

Claims (24)

An encoder for coding raw data to generate communication unit input data, A communication unit for transmitting the communication unit input data to the client sequentially through an application layer, a transport layer, an IP layer, and a network connection layer; A transmission amount determining unit comparing and comparing the communication unit input data with the communication unit output data output from the communication unit transmitted through at least the transport layer or the client input data transmitted to at least one client; And a transmission controller controlling the encoder according to the determination of the transmission determination unit. The apparatus of claim 1, wherein the transmission rate determining unit comprises: a first measuring unit measuring the communication unit input data; A second measurement unit measuring the communication unit output data or the client input data, and And a determination unit for comparing and determining data measured by the first measurement unit and the second measurement unit. The Internet network device according to claim 2, wherein the raw data is image data. The Internet of claim 3, wherein the transmission controller controls the encoder to adjust any one selected from the group consisting of frame rate, bit rate, and resolution of the image data according to the transmission rate determination unit. Network devices. The method of claim 4, wherein when the transmission amount determining unit determines that the second data measured by the second measuring unit is smaller than the first data measured by the first measuring unit, And the transmission control unit reduces the frame rate, reduces the bit rate, or reduces the resolution of the image data. The apparatus of claim 1, wherein the transmission rate determining unit comprises: a first measuring unit measuring the communication unit input data; A second measuring unit measuring input data of at least one client, A calculator for calculating an average of the input data of the client, and And a determination unit for comparing and determining the input data provided from the first measurement unit and the average provided from the calculation unit. The method of claim 6, wherein the calculator adds a correction value to the average to generate an average approximation value, And the determining unit compares the input data with the average approximation value. 7. The internet network device according to claim 6, wherein the raw data is image data. The Internet of claim 8, wherein the transmission control unit controls the encoder to adjust any one selected from the group consisting of frame rate, bit rate, and resolution of the image data according to the transmission rate determining unit. Network devices. The method of claim 9, wherein when the transmission amount determining unit determines that the second data provided from the calculating unit is smaller than the first data measured by the first measuring unit, And the transmission control unit reduces the frame rate, reduces the bit rate, or reduces the resolution of the image data. The apparatus of claim 10, wherein the communication unit temporarily stores the communication unit input data; An input controller for controlling the data storage, and And an output control unit for controlling the output of the stored data. 12. The Internet network device of claim 11, wherein the input control unit controls to store data in the ring buffer according to an input pointer, a ring buffer capacity, and a previously stored data capacity. The Internet network device according to claim 11, wherein the output control unit controls to read data from the ring buffer according to an output pointer, frame order information of a last image, and the order determination. 14. An internet network device according to claim 13, wherein the client has a unique output pointer (Pout). Input the raw data, encode the raw data, input the encoded data to the communication unit, and sequentially transmit the data to at least one client through an application layer, a transport layer, an IP layer, and a network connection layer of the communication unit. In the data transmission method of the Internet network device to transmit, Measuring a capacity of communication unit input data inputted to the communication unit, Measuring a capacity of the communication unit output data output from the communication unit or the client input data transmitted to the client at least through the transport layer; Comparing and determining the measured capacity of the communication unit input data and the communication unit output data or the client input data; And controlling the encoding according to the determination result. 16. The method of claim 15, wherein the data is video data. The method of claim 16, wherein the communication unit output data or the client input data is larger than the communication unit input data. And encoding the raw data to reduce the frame rate, reduce the bit rate, or reduce the resolution. 16. The method of claim 15, further comprising calculating an average of input data of the plurality of clients, And comparing and determining an average of the communication unit input data and the client input data. 19. The method of claim 18, wherein the data is image data. The method of claim 19, wherein when the average of the client input data is greater than the communication unit input data, And encoding the raw data to reduce the frame rate, reduce the bit rate, or reduce the resolution. 19. The method of claim 18, further comprising calculating a mean approximation by adding a correction to the mean, And comparing and determining an average approximation value of the communication unit input data and the client input data. 22. The method of claim 21, wherein the data is video data. 20. The method of claim 19, wherein the average approximation of the client input data is greater than the communication input data. And encoding the raw data to reduce the frame rate, reduce the bit rate, or reduce the resolution. 20. The method of claim 19, further comprising: storing a plurality of encoded communication unit input data in a ring buffer according to an input pointer, a ring buffer capacity, and an already stored data capacity; And reading data stored in the ring buffer according to an output pointer, frame order information of a last image, and determining the order.

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