JP2007235798A - Power line communication apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a power line communication apparatus with which normal power line communication can be performed by ensuring data transmission reliability, even if the transmission line status of an AC power line to be used for power line communication is defective. <P>SOLUTION: If much noise is generated on a commercial AC power line and a transmission line status is defective, with data transmission reliability ensured, a video signal is then received via a first AC/signal superimposing/separating section 2 and a power line communication processing section 5; processings required for power line communication are temporarily canceled; the video signal is then accumulated in a storage section 6; processing required for power line communication is applied again via the power line communication processing section 5 and a second AC/signal superimposing/separating section 3; and the video signal is transmitted to power line communication enabled equipment connected to an AC power supply terminal section 8, while being superimposed on second AC power from which noise is eliminated. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a power line communication apparatus that transmits video signals, audio signals, control signals, and the like using power line communication.

  2. Description of the Related Art In recent years, attention has been focused on power line communication technology that uses an existing commercial AC power line for supplying AC power to home appliances and the like and superimposes various information such as video signals, audio signals, and control signals on AC power. ing. By introducing this power line communication technology to AV equipment, etc., only the power cable is connected to a power outlet in order to transmit video signals, audio signals, etc. between equipment, and there is no need to wire a new cable. User convenience can be improved.

  Usually, a power line communication apparatus such as an AV device using the power line communication technology is used by connecting to a commercial AC power line in a home or the like. In addition to the power line communication device, an environment where various home appliances and the like are connected to the commercial AC power line is assumed. Among such household electrical appliances, high-frequency noise that is a frequency corresponding to the frequency band used for communication by the power line communication device is generated, or the impedance of the commercial AC power line is fluctuated simply by connection. Equipment also exists. Household appliances connected to commercial AC power lines in each home are different, and different devices are connected depending on the time zone even in the same home. In other words, since the transmission line state when the commercial AC power line is regarded as a transmission line for power line communication is changing every moment, the best performance when performing power line communication using such an AC power line, that is, In order to realize error-free communication at the maximum data transmission rate, it is necessary to change the transmission method of the power line communication device according to the state of the transmission line at that time.

  In order to solve this problem, the conventional power line communication device has high noise resistance even if the transmission speed is sacrificed when the AC power line used has a lot of noise, that is, when the transmission line state is poor. If the AC power line is relatively low in noise, that is, if the transmission line condition is good, the transmission method is changed to a transmission method suitable for high-speed transmission, and the transmission line condition is adjusted. Those that realize power line communication have been proposed.

  A conventional power line communication apparatus will be described below.

  Conventionally, for example, a power line communication device described in Patent Document 1 is known. FIG. 4 is a diagram for explaining the configuration of a conventional power line communication apparatus, which has the same configuration on both the transmission side and the reception side. In FIG. 4, 41 is an AC power input terminal unit for connecting to a commercial AC power line, and 42 is a transmission side that generates a power line communication signal in which a power line communication information signal is superimposed on AC power, and an AC power input terminal unit. 41 and AC / signal superposition for separating and outputting the AC power and the power line communication information signal from the power line communication signal received via the commercial AC power line and the AC power input terminal 41 on the receiving side. The separation unit 43 performs processing necessary for power line communication on the information signal such as the video signal, the audio signal, and the control signal on the transmission side to generate a power line communication information signal, and outputs it to the AC / signal superposition separation unit 42 On the receiving side, a power line communication process for acquiring information signals such as video signals, audio signals, and control signals from the power line communication information signals separated by the AC / signal superimposing separation unit 2. Parts, 44, the transmission side stores the information signals output from the power line communication unit 43, the receiving side is a storage unit that reads and outputs the information signals stored in the power line communication processing unit 43.

  FIG. 5 is a diagram illustrating a state in which a power line communication information signal is superimposed on AC power in power line communication. In FIG. 5, the upper left figure shows AC power of 100 V at a frequency of 50 Hz or 60 Hz supplied to the commercial power line, and the lower left figure is generated from a video signal, an audio signal, a control signal, etc. that are desired to be transmitted through the AC power line. It is a power line communication information signal. Normally, in power line communication, this power line communication information signal is superimposed on AC power to generate a power line communication signal as shown in the right figure, whereby the information signal is transmitted via the AC power line.

  Here, the processing necessary for power line communication performed in the power line communication processing unit 43 includes protocol processing and power line communication protocol processing in each layer defined by an OSI (Open Systems Interconnection) reference model for information signals. Thus, a power line communication information signal as shown in the lower left diagram of FIG. 5 is generated.

  With the configuration as described above, in the conventional power line communication device, the transmission side and the reception side determine the transmission method and perform transmission while exchanging information with each other. At that time, the transmission line state detection unit (not shown) included in the power line communication processing unit 43 detects the noise state of the AC power line used as the transmission line, and the power line communication processing unit 43 also detects the noise state based on the detection result. An included transmission method change unit (not shown) selects the optimum transmission method for the transmission path and performs transmission. Here, as a method of detecting a transmission path state, a method of measuring an S / N ratio for each carrier to which data to be transmitted is allocated, an error rate of received data, and data that could not be received are retransmitted. A method of estimating from the ratio, that is, the retransmission rate can be considered.

  In power line communication, a method is adopted in which a plurality of carriers (for example, 100) are set in a frequency band to be used, and a plurality of bits (for example, a maximum of 4 bits) of data to be transmitted are allocated to each carrier and transmitted. There is something. In such a case, if a maximum of 4 bits can be allocated and transmitted to all 100 carriers, a total of 400 bits of information can be transmitted. However, in order to allocate and transmit 4 bits of information to one carrier, a margin for noise is required, and in order to transmit data without error when there is a lot of noise occurring in the transmission path. There are also carriers that cannot allocate 4-bit information and can allocate only a small number of bits such as 3, 2, 1, 0 bits. This means that the transmission speed is lowered, the S / N ratio of each carrier is measured by the transmission path state detection unit, and the number of bits allocated to the noisy carrier by the transmission method change unit based on the measurement result The reliability of data transmission is ensured by reducing the transmission.

  In some cases, an error correction code is added and transmitted so that a transmission error occurring during communication can be detected and corrected. In this case, since the number of bits in which errors have occurred in the received data can be detected on the receiving side, it is possible to grasp the transmission path state to some extent. When the transmission path condition deteriorates, the error rate increases. When the transmission path condition further deteriorates, the transmission path condition detection unit detects that the error correction code cannot be corrected. In order to prevent this from happening, the transmission method changing unit further increases the redundancy, that is, increases the ratio of error correction code bits, thereby ensuring the reliability of data transmission.

  Furthermore, if the receiving side cannot receive the data normally, it requests the transmitting side to retransmit the data. In other words, the transmission path state detection unit can detect that the transmission path state has deteriorated when the retransmission rate increases by detecting this retransmission rate, and transmit the data that could not be received by the transmission system change unit until it can be received normally. Continue to request retransmission on the side. That is, the reliability of data transmission is ensured by transmitting the same data many times.

In any of the above-described changes in the transmission method, data to be originally transmitted is transmitted with a low transmission throughput in order to ensure the reliability of data transmission.
JP 2001-237904 A

  However, in the above-described conventional power line communication apparatus, the original transmission throughput of data obtained when the transmission path state is bad, such as a lot of noise occurring on the AC power line, can be kept low. In this state, for example, when the transmission throughput is about 5 Mbps, when a 10 Mbps video signal is transmitted from the AV server that is the transmission-side power line communication device, the monitor that is the reception-side power line communication device. In this case, the video signal cannot be normally received, incorrect data is displayed, or the video is lost in the middle, and the normal video signal cannot be viewed.

  The present invention solves the above-mentioned conventional problems, and even when the transmission path state of the AC power line used for power line communication is poor, it is possible to ensure the reliability of data transmission and perform normal power line communication. An object is to provide a possible power line communication device.

  According to a first aspect of the present invention, there is provided a power line communication apparatus that transmits information signals such as video signals, audio signals, and control signals via an AC power line that supplies power. A power line provided with an AC power line connection unit, wherein at least one of the AC power line connection units is obtained by removing a signal component in a frequency band used for power line communication and performing processing necessary for power line communication on the information signal A power line communication apparatus capable of transmitting a power line communication signal on which a communication information signal is superimposed. Even when an AC power line having a poor transmission path state is connected to one connection portion, at least one AC Since power line communication without noise can be performed from the connection part to the power line, for example, an image received at a low speed via an AC power line having a poor transmission path state An information signal, such as No., has the effect of re-superposed on noiseless AC power can be transmitted at high speed.

  According to a second aspect of the present invention, the first and second AC power line connecting units connected to the AC power line, and the first and second AC power lines that separate or superimpose the AC power and the power line communication information signal are separated. / Signal superimposing / separating section, selecting section for selecting an output destination of the power line communication information signal, and power line communication processing section for extracting an information signal from the power line communication information signal or performing processing necessary for power line communication on the information signal 2. A power line communication apparatus according to claim 1, further comprising: a storage unit that stores the information signal; and a noise filter unit that removes noise from the AC power. An information signal such as a video signal received reliably from a power line communication device connected to an AC power line is temporarily stored in a storage unit, and is re-superimposed on noise-free AC power so that the transmission line state is An effect that can be transmitted at high speed over a good AC-power line.

  According to the third aspect of the present invention, when information signals such as video signals, audio signals, and control signals are received and stored via the commercial AC power line connected to the first AC power line connection unit. The first AC / signal superimposing / separating unit connects a first power line communication signal obtained by superimposing a first power line communication information signal to a first AC power from the commercial AC power line to the first AC power line. And the first AC power and the first power line communication information signal are separated and output, and the noise filter unit is output from the first AC / signal superimposing / separating unit. The signal component in the frequency band used for power line communication is removed from the first AC power and output to the second AC / signal superimposing / separating unit as the second AC power. The output from the AC / signal superimposing separation unit 1 power line communication information signal is selected and output to the power line communication processing unit, and the power line communication processing unit obtains a first information signal from the first power line communication information signal output from the selection unit. When the first information signal stored in the storage unit is transmitted from the second AC power line connection unit, the storage unit stores the first information signal. The unit reads out the stored first information signal and outputs the first information signal to the power line communication processing unit. The power line communication processing unit performs a process necessary for power line communication on the first information signal to generate a second power line. The communication information signal is output to the selection unit, and the selection unit selects and outputs the second AC / signal superposition / separation unit as an output destination of the second power line communication information signal, and the second AC The signal superimposing / separating unit is the second power line The power line communication device according to claim 2, wherein a communication information signal is superimposed on the second AC power and is output as a second power line communication signal via the second AC power line connection unit. An information signal such as a video signal that is reliably received at low speed from a power line communication device connected to a commercial AC power line having a poor transmission path state is temporarily stored in the storage unit, and is then superimposed again on noise-free AC power. Thus, the transmission line can be transmitted at high speed via an AC power line having a good transmission path state.

  According to the fourth aspect of the present invention, when an information signal such as a video signal, an audio signal, and a control signal is received and stored via the AC power line connected to the second AC power line connection unit. The third power line communication signal in which the third power line communication information signal is superimposed on the second AC power is input via the second AC power line connection unit, and the second AC / signal superposition separation unit is The third power line communication signal input from the second AC power line connection unit is received, separated into the second AC power and the third power line communication information signal, and output, and the noise filter unit The signal component in the frequency band used for power line communication is removed from the second AC power output from the second AC / signal superimposing / separating unit to obtain the first AC / signal as the first AC power. While outputting to the superposition separation unit, the selection unit The third power line communication information signal output from the second AC / signal superposition demultiplexing unit is selected and output to the power line communication processing unit, and the power line communication processing unit is configured to output the third power line communication information signal output from the selection unit. The second information signal is acquired from the power line communication information signal 3 and output to the storage unit, the storage unit stores the second information signal, and the second information signal stored in the storage unit is stored in the storage unit. When transmitting via a commercial AC power line, the storage unit reads the stored second information signal and outputs the second information signal to the power line communication processing unit, and the power line communication processing unit receives the second information signal. Is subjected to processing necessary for power line communication, and is output to the selection unit as a fourth power line communication information signal. The selection unit outputs the first AC / signal superposition separation as the output destination of the fourth power line communication information signal. Selected and output, the first The C / signal superimposing / separating unit superimposes the fourth power line communication information signal on the first AC power, and outputs it as a fourth power line communication signal via the first AC power line connecting unit. 3. The power line communication device according to claim 2, wherein an information signal such as a video signal received at high speed from a power line communication device connected to an AC power line having no noise and good transmission path condition is temporarily stored in a storage unit. This has the effect that it can be re-superimposed on the AC power and transmitted reliably at low speed via the commercial AC power line with a poor transmission path state.

  According to a fifth aspect of the present invention, the power line communication processing unit detects a transmission line state of an AC power line used for power line communication from an input power line communication information signal, and the transmission line state of the AC power line is determined. The communication is performed by a method suitable for high-speed transmission when good, and the communication is performed by a method with high noise resistance when the transmission path state of the AC power line is poor. 5. The power line communication apparatus according to claim 4, which has an effect that data can be transmitted and received by an optimal transmission method according to a transmission path state of the connected AC power line.

  The invention according to claim 6 of the present invention is a first and second AC power line connection unit connected to the AC power line, a selection unit for selecting an output destination of the superimposed AC power and the power line communication information signal, A signal superposition / separation unit that separates or superimposes the AC power and the power line communication information signal; a power line communication processing unit that extracts an information signal from the power line communication information signal or performs processing necessary for power line communication on the information signal; The power line communication apparatus according to claim 1, further comprising: a storage unit that stores the information signal; and a noise filter unit that removes noise from the AC power. An information signal such as a video signal that is reliably received at low speed from the power line communication device connected to the PC is temporarily stored in the storage unit, and is superimposed again on the noise-free AC power, so that the transmission line state is An effect that can be transmitted at high speed over a good AC-power line.

  According to the seventh aspect of the present invention, when information signals such as video signals, audio signals, and control signals are received and stored via the commercial AC power line connected to the first AC power line connection unit. The selection unit receives the first power line communication signal in which the first power line communication information signal is superimposed on the first AC power from the commercial AC power line via the first AC power line connection unit. The signal superimposing / separating unit and the second AC power line connecting unit are selected and output as output destinations, and the second AC power line connecting unit outputs the first power line communication signal to an external device, and the signal superimposing / separating unit The unit separates and outputs the first power line communication information signal from the first power line communication signal output from the selection unit, and the power line communication processing unit outputs the first power line communication information signal from the signal superposition separation unit. From the first power line communication information signal The first information signal output from the power line communication processing unit is stored, and the first information signal stored in the storage unit is stored in the first information signal. When transmitting from two AC power line connection units, the selection unit receives the first power line communication signal or the first AC power from the commercial AC power line via the first AC power line connection unit. Then, a noise filter unit is selected and output as an output destination, and the noise filter unit is used for power line communication from the first power line communication signal or the first AC power output from the selection unit. The signal component in the frequency band is removed to obtain the second AC power, the storage unit reads the stored first information signal, and the power line communication processing unit is read from the storage unit The first information signal In addition, processing necessary for power line communication is performed to generate and output a second power line communication information signal, and the signal superimposing / separating unit outputs the second power line communication information signal output from the power line communication processing unit to the second power line communication information signal. A second power line communication signal is generated and output superimposed on the second AC power, and the second AC power line connection unit outputs the second power line communication signal to an external device. The power line communication device according to claim 6, wherein an information signal such as a video signal received reliably at low speed from a power line communication device connected to a commercial AC power line having a poor transmission path state is temporarily stored in the storage unit, It has the effect | action that it can superimpose on AC power without a noise again, and can transmit at high speed via an AC power line with a favorable transmission line state.

  In the invention according to claim 8 of the present invention, when information signals such as video signals, audio signals, and control signals are received and stored via the AC power line connected to the second AC power line connection unit, The selection unit receives the first power line communication signal or the first AC power from the commercial AC power line via the first AC power line connection unit, selects and outputs the noise filter unit as an output destination, and The noise filter unit removes a signal component in a frequency band used for power line communication from the first power line communication signal or the first AC power output from the selection unit, and acquires second AC power. The second AC power line connection unit receives a third power line communication signal obtained by superimposing a third power line communication information signal on the second AC power via the connected AC power line, The superimposing / separating unit The third power line communication signal input from the AC power line connection unit is received, the third power line communication information signal is separated and output, and the power line communication processing unit is output from the signal superposition separation unit The second information signal is acquired and output from the third power line communication information signal, and the storage unit stores the second information signal output from the power line communication processing unit, and stores the second information signal in the storage unit. When the transmitted second information signal is transmitted via the commercial AC power line, the selection unit receives the first AC power via the commercial AC power line and outputs the signal as an output destination. The superposition / separation unit and the second AC power line connection unit are selected and output, the storage unit reads the stored second information signal, and the power line communication processing unit is read from the storage unit Power to the second information signal Processing necessary for communication is performed to generate and output a fourth power line communication information signal, and the signal superimposing / separating unit outputs the fourth power line communication information signal output from the power line communication processing unit to the first power line communication information signal. The fourth power line communication signal is generated by superimposing on the AC power of the first power line communication signal and output to the selection unit. The selection unit selects the fourth power line communication signal, and the first AC power line connection unit 7. The power line communication device according to claim 6, wherein the power line communication device outputs the signal from the power line communication device connected to the AC power line having no noise and good transmission path state. An information signal such as a video signal is temporarily stored in the storage unit, and is re-superimposed on the AC power, so that it can be reliably transmitted at a low speed via a commercial AC power line having a poor transmission path state.

  According to the ninth aspect of the present invention, the power line communication processing unit detects a transmission path state of the AC power line used for power line communication from the input power line communication information signal, and the transmission path state of the AC power line is determined. The communication is performed by a method suitable for high-speed transmission when favorable, and the communication is performed by a method with high noise resistance when the transmission path state of the AC power line is poor. 9. The power line communication device according to claim 8, wherein the power line communication device has an effect that data can be transmitted and received by an optimum transmission method according to a transmission path state of the connected AC power line.

  According to a tenth aspect of the present invention, the first and second AC power line connecting portions connected to the AC power line, and the first and second AC power lines that separate or superimpose the AC power and the power line communication information signal are separated. / Signal superimposing / separating section, first and second power line communication processing sections for extracting an information signal from the power line communication information signal or performing processing necessary for power line communication on the information signal, and a storage section for storing the information signal And a noise filter unit that removes noise from the AC power. The power line communication device according to claim 1, wherein the power line communication device is connected to an AC power line having a bad transmission path state. An information signal such as a video signal received reliably at low speed is temporarily stored in the storage unit, and then superimposed again on noise-free AC power, and then transmitted at high speed via an AC power line with good transmission path conditions. It has the effect that it is Rukoto.

  According to the eleventh aspect of the present invention, when information signals such as video signals, audio signals, and control signals are received from the commercial AC power line via the first AC power line connection unit and stored, the first signal is stored. The AC / signal superimposing / separating unit outputs a first power line communication signal in which a first power line communication information signal is superimposed on first AC power from the commercial AC power line via the first AC power line connecting unit. The first AC power and the first power line communication information signal are received and separated, and the noise filter unit outputs the first AC output from the first AC / signal superimposing / separating unit. The signal component in the frequency band used for power line communication is removed from the power to obtain the second AC power, and the information signal such as the video signal, the audio signal and the control signal is connected from the commercial AC power line to the first AC power line. Received and stored through the department The second AC / signal superimposing / separating unit outputs the second AC power output from the noise filter unit to the second AC power line connecting unit, and the second AC power line connecting unit. Outputs the second AC power to an external device, and the first power line communication processing unit outputs a first power line communication information signal output from the first AC / signal superimposing / separating unit from the first power line communication information signal. An information signal is acquired and output, and a storage unit stores the first information signal output from the first power line communication processing unit, and the first information signal stored in the storage unit is stored in the storage unit. When transmitting from the second AC power line connection unit, the storage unit reads the stored first information signal, and the second power line communication processing unit reads the information read from the storage unit. Apply the processing necessary for power line communication to the signal, and connect the second power line. An information signal is generated and output, and the second AC / signal superimposing / separating unit superimposes the second power line communication information signal output from the second power line communication processing unit on the second AC power. The power line according to claim 10, wherein the second power line communication signal is generated and output, and the second AC power line connection unit outputs the second power line communication signal to an external device. An information signal such as a video signal received at low speed from a power line communication device connected to a commercial AC power line that is a communication device and has a poor transmission path condition is temporarily stored in the storage unit, and again AC power without noise And the transmission line state can be transmitted at high speed via an AC power line having a good transmission path state.

  According to the twelfth aspect of the present invention, when information signals such as video signals, audio signals, and control signals are received and stored via the AC power line connected to the second AC power line connection unit, The second AC power line connection unit receives a third power line communication signal obtained by superimposing a third power line communication information signal on the second AC power via the connected AC power line, The AC / signal superimposing / separating unit receives the third power line communication signal input from the second AC power line connecting unit, and separates the third AC power signal into the second AC power and the third power line communication information signal. The second power line communication processing unit obtains and outputs a second information signal from the third power line communication information signal output from the second AC / signal superposition / separation unit, and stores the second information signal. Unit is output from the second power line communication processing unit When storing the second information signal and transmitting the second information signal stored in the storage unit via a commercial AC power line, the storage unit stores the stored second information signal. Reading, the first power line communication processing unit performs processing necessary for power line communication on the second information signal read from the storage unit, generates a fourth power line communication information signal, and outputs the fourth power line communication information signal, The first AC / signal superimposing / separating unit generates the fourth power line communication signal by superimposing the fourth power line communication information signal output from the first power line communication processing unit on the first AC power. A power line communication device that outputs from the first AC power line connection unit via the commercial AC power line, and is connected to an AC power line that is free from noise and has a good transmission path state Video signals received at high speed from Accumulates broadcast signal temporarily in the storage unit, and re-superimposed on again AC power, an effect that can be reliably transmitted at low-speed transmission path state through a poor commercial AC power line.

  According to a thirteenth aspect of the present invention, the first and second power line communication processing units detect a transmission path state of an AC power line used for power line communication from an input power line communication information signal, and When the transmission line state of the power line is good, communication is performed using a method suitable for high-speed transmission, and when the transmission line state of the AC power line is poor, communication is performed using a method with high noise resistance. The power line communication device according to any one of claims 10 to 12, which has an effect that data can be transmitted and received by an optimal transmission method according to a transmission path state of the connected AC power line.

  According to a fourteenth aspect of the present invention, a write operation from the first power line communication processing unit to the storage unit, a read operation from the storage unit to the second power line communication processing unit, and the second power line communication The write operation from the processing unit to the storage unit and the read operation from the storage unit to the first power line communication processing unit can be performed simultaneously. A power line communication device that receives information signals such as video signals via a commercial AC power line and stores them in the storage unit, while simultaneously transmitting information signals such as video signals stored in the storage unit in a good transmission path state. In contrast, information signals such as video signals can be received via the AC power line with a good transmission path state and stored in the storage unit while being simultaneously stored in the storage unit. Accumulation Information signals such as video signals that have the effect that can be transmitted over commercial AC power line.

  As described above, the present invention enables connection to both a commercial AC power line that may have a poor transmission path state and an AC power line that has a good transmission path state separated from it. Thus, for example, a video signal with a large amount of information is reliably downloaded at a low speed from an AV server or the like connected to a commercial AC power line where there is a lot of noise, and the video signal is downloaded to a monitor connected to an AC power line free from noise. By transmitting at high speed, it is possible to provide a power line communication device capable of viewing a normal video signal without data errors or omissions.

  Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 3.

(Embodiment 1)
FIG. 1 is a diagram showing a schematic configuration of a power line communication apparatus according to a first embodiment of the present invention. 1 is an AC power input terminal unit, 2 and 3 are first and second AC / signal superimposing / separating units, 4 Is a selection unit, 5 is a first power line communication processing unit, 6 is a first storage unit, 7 is a noise filter unit, and 8 is an AC power supply terminal unit.

  Hereinafter, the power line communication apparatus according to the first embodiment of the present invention will be described with reference to FIG.

  In the power line communication device according to the first embodiment of the present invention, the first AC / signal superimposing / separating unit 2 receives the first power line communication signal in which the first power line communication information signal is superimposed on the first AC power, The signal is received from the commercial AC power line via the AC power input terminal unit 1, separated into the first AC power and the first power line communication information signal and output, and the noise filter unit 7 performs the first AC / signal superposition. Information signals such as video signals, audio signals, and control signals are obtained by removing signal components in the frequency band used for power line communication from the first AC power output from the separation unit 2 to obtain second AC power. Is received via the commercial AC power line and stored, the second AC / signal superimposing / separating unit 3 outputs the second AC power output from the noise filter unit 7, and the AC power supply terminal unit 8 outputs the second AC power to the external device and selects it. The unit 4 selects the A side, selects the first power line communication information signal output from the first AC / signal superimposing / separating unit 2, and outputs it to the power line communication processing unit 5. The power line communication processing unit 5 The information signal is acquired from the first power line communication information signal output from the selection unit 4 and output. The storage unit 6 stores the information signal output from the power line communication processing unit 5 and stores the information signal in the storage unit 6. When the information signal thus transmitted is transmitted from the AC power supply terminal unit 8, the storage unit 6 reads the stored information signal, and the power line communication processing unit 5 performs power line communication on the information signal read from the storage unit 6. To generate and output a second power line communication information signal, and the selection unit 4 selects the B side and outputs the second power line communication information signal output from the power line communication processing unit 5 Select and output second AC / signal superimposing / separating unit 3 as the destination The second AC / signal superimposing / separating unit 3 generates and outputs a second power line communication signal by superimposing the second power line communication information signal output from the selecting unit 4 on the second AC power, The AC power supply terminal unit 8 outputs the second power line communication signal to an external device.

  Thus, in the present embodiment, for example, when a video signal stored in an AV server that is a power line communication compatible device connected to a commercial AC power line is viewed on a monitor that is also a power line communication compatible device, When a lot of noise is generated on the AC power line and the transmission line state is bad, the power line communication apparatus of this embodiment ensures the reliability of data transmission by the method described in the conventional example. Above, after receiving the first AC / signal superimposing / separating unit 2 and the power line communication processing unit 5 and solving the processing necessary for power line communication once and accumulating the video signal in the storage unit 6, the power line again Processing necessary for power line communication is performed via the communication processing unit 5 and the second AC / signal superimposing / separating unit 3 to be superimposed on the second AC power from which noise has been removed and connected to the AC power supply terminal unit 8. Been by transmitting to a monitor is a power line communication compliant device can view without causing erroneous display or missing video signal.

  Here, the case where the data received via the commercial AC power line and stored in the storage unit 6 is transmitted to the power line compatible device connected to the AC power supply terminal unit 8 has been described. The data to be transmitted may be data stored in the storage unit 6 in advance, or may be data reproduced from a medium such as a DVD (Digital Versatile Disk).

  Note that the data received via the commercial AC power line may be a control signal for controlling the power line communication apparatus of the present embodiment, and is not necessarily stored in the storage unit 6.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 2)
FIG. 1 is also a diagram showing a schematic configuration of a power line communication apparatus according to Embodiment 2 of the present invention.

  Hereinafter, the power line communication apparatus according to the second embodiment of the present invention will be described with reference to FIG.

  In the power line communication device according to the second embodiment of the present invention, in addition to the operation of the power line communication device according to the first embodiment, information signals such as video signals, audio signals, and control signals are connected to the AC power supply terminal unit 8. In the case of receiving and storing via the AC power line, the AC power supply terminal unit 8 has a third power line communication information signal superimposed on the second AC power via the connected AC power line. The second AC / signal superimposing / separating unit 3 receives the third power line communication signal input from the AC power supply terminal unit 8 and receives the second AC power and the third power line communication signal. The power line communication information signal is separated and output, and the selection unit 4 selects the B side, selects the third power line communication information signal output from the second AC / signal superposition separation unit 3, and performs power line communication processing. Output to the unit 5, the power line communication processing unit 5 from the selection unit 4 The information signal is acquired from the input third power line communication information signal and output, and the storage unit 6 stores the information signal output from the power line communication processing unit 5 and commercializes the information signal stored in the storage unit 6 When transmitting via the AC power line, the storage unit 6 reads the stored information signal, and the power line communication processing unit 5 performs processing necessary for power line communication on the information signal read from the storage unit 6. The fourth power line communication information signal is generated and output, and the selection unit 4 selects the A side and outputs the first AC as the output destination of the fourth power line communication information signal output from the power line communication processing unit 5 / Signal superimposing / separating unit 2 is selected and output, and first AC / signal superimposing / separating unit 2 superimposes the fourth power line communication information signal output from selecting unit 4 on the first AC power, Generate a fourth power line communication signal from the AC power input terminal 1 And outputs through the use AC power lines.

  As a result, in the present embodiment, for example, video signals stored in a recorder that is a power line communication compatible device connected to the AC power supply terminal unit 8 are converted into an AV that is a power line communication compatible device connected to a commercial AC power line. When uploading to the server, if a lot of noise is generated on the commercial AC power line and the transmission path state is bad, the power line communication device of this embodiment is connected to the AC power supply terminal unit 8. A video signal transmitted by being superimposed on the second AC power from which noise has been removed is received from the recorder, which is a device compatible with power line communication, via the second AC / signal superimposing / separating unit 3 and the power line communication processing unit 5. Once the processing necessary for power line communication is solved and the video signal is accumulated in the storage unit 6, the power line is again passed through the power line communication processing unit 5 and the first AC / signal superimposing / separating unit 2. It is possible to perform transmission without causing any omission by superimposing it on a commercial AC power line while ensuring the reliability of data transmission using the method described in the prior art by performing processing necessary for communication. .

  In addition, although the case where the data received from the power line communication-compatible device connected to the AC power supply terminal unit 8 and stored in the storage unit 6 is transmitted via the commercial AC power line has been described here, the commercial AC power line is used. The data to be transmitted may be data stored in the storage unit 6 in advance, or may be data reproduced from a medium such as a DVD.

  Note that the data received from the power line communication compatible device connected to the AC power supply terminal unit 8 may be a control signal for controlling the power line communication device of the present embodiment, and is not necessarily stored in the storage unit 6. There is no need.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 3)
FIG. 1 is also a diagram showing a schematic configuration of a power line communication apparatus according to Embodiment 3 of the present invention.

  Hereinafter, the power line communication apparatus of Embodiment 3 of this invention is demonstrated using FIG.

  In the power line communication device according to the third embodiment of the present invention, during operation of the power line communication device according to the first and second embodiments, a transmission line state detection unit (not shown) included in the power line communication processing unit 5 serves as a transmission line. The noise state of the AC power line being used is detected, and based on the detection result, the transmission method changing unit (not shown) included in the power line communication processing unit 5 selects the optimal transmission method for the transmission line. Perform transmission. Here, the detection method of the transmission path state and the determination method of the optimum transmission method are the same as the method described in the conventional example.

  Thus, in this embodiment, for each AC power line to be used, when the transmission line state is good, communication is performed using a method suitable for high-speed transmission, and when the transmission line state is poor, noise resistance is achieved. Communicates with a high method.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 4)
FIG. 2 is a diagram showing a schematic configuration of the power line communication apparatus according to the fourth embodiment of the present invention, and the same components as those in FIG. 1 in the power line communication apparatus according to the first embodiment of the present invention are denoted by the same reference numerals. Reference numeral 9 denotes a selection unit, and 10 denotes a signal superposition / separation unit.

  Hereinafter, the power line communication apparatus of Embodiment 4 of this invention is demonstrated using FIG.

  In the power line communication device according to the fourth embodiment of the present invention, when information signals such as video signals, audio signals, and control signals are received and stored via the commercial AC power line, the selection unit 9 selects the A side. Then, the first power line communication signal in which the first power line communication information signal is superimposed on the first AC power is received from the AC power input terminal unit 1 via the commercial AC power line, and the signal is superimposed as an output destination. The separation unit 10 and the AC power supply terminal unit 8 are selected and output. The AC power supply terminal unit 8 outputs the first power line communication signal to an external device. The signal superposition separation unit 10 outputs from the selection unit 9. The first power line communication information signal is separated from the generated first power line communication signal and output, and the power line communication processing unit 5 receives information from the first power line communication information signal output from the signal superposition / separation unit 10. The signal is acquired and output, and the storage unit 6 When the information signal output from the power line communication processing unit 5 is stored and the information signal stored in the storage unit 6 is transmitted from the AC power supply terminal unit 8, the selection unit 9 selects the B side. The first power line communication signal or the first AC power is received from the AC power input terminal unit 1 through the commercial AC power line, and the noise filter unit 7 is selected and output as an output destination. The noise filter unit 7 The second AC power is obtained by removing the signal component in the frequency band used for the power line communication from the first power line communication signal or the first AC power output from the selection unit 9, and the storage unit 6 Then, the stored information signal is read, and the power line communication processing unit 5 performs processing necessary for the power line communication on the information signal read from the storage unit 6 to generate and output a second power line communication information signal. The signal superimposing / separating unit 10 is a power line The second power line communication information signal output from the communication processing unit 5 is superimposed on the second AC power to generate and output a second power line communication signal, and the AC power supply terminal unit 8 is connected to the second power line. Output communication signals to external devices.

  Thus, in the present embodiment, for example, when a video signal stored in an AV server that is a power line communication compatible device connected to a commercial AC power line is viewed on a monitor that is also a power line communication compatible device, When a lot of noise is generated on the power line and the transmission line state is bad, the power line communication device of the present embodiment ensures the reliability of data transmission by the method described in the conventional example. Then, after receiving the signal superimposing / separating unit 10 and the power line communication processing unit 5 and solving the processing necessary for the power line communication once, storing the video signal in the storage unit 6, the first power line communication processing is performed again. The power line connected to the AC power supply terminal unit 8 by performing processing necessary for power line communication via the unit 5 and the signal superimposing / separating unit 10 and superimposed on the second AC power from which noise has been removed By transmitting to a monitor a signal compatible device can view without causing erroneous display or missing video signal.

  Here, the case where the data received via the commercial AC power line and stored in the storage unit 6 is transmitted to the power line communication compatible device connected to the AC power supply terminal unit 8 has been described. The data to be transmitted may be data stored in the storage unit 6 in advance, or may be data reproduced from a medium such as a DVD.

  Note that the data received via the commercial AC power line may be a control signal for controlling the power line communication apparatus of the present embodiment, and is not necessarily stored in the storage unit 6.

  If the transmission line state is good for both the commercial AC power line connected to the AC power input terminal unit 1 and the AC power line connected to the AC power supply terminal unit 8, the output destination of the selection unit 9 is set to A The first power line communication signal received from the commercial AC power line side is transmitted via the AC power line directly connected to the AC power supply terminal unit 8 by selecting the side to be the AC power supply terminal unit 8. You may control to.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 5)
FIG. 2 is a diagram also illustrating a schematic configuration of the power line communication device according to the fifth embodiment of the present invention.

  Hereinafter, the power line communication apparatus of Embodiment 5 of this invention is demonstrated using FIG.

  In the power line communication device according to the fifth embodiment of the present invention, in addition to the operation of the power line communication device according to the fourth embodiment, information signals such as video signals, audio signals, and control signals are connected to the AC power supply terminal unit 8. When receiving and storing via the AC power line, the selection unit 9 selects the B side, receives the first power line communication signal or the first AC power via the commercial AC power line, and outputs it. The noise filter unit 7 is selected and output first, and the noise filter unit 7 outputs a signal in the frequency band used for power line communication from the first power line communication signal or the first AC power output from the selection unit 9. The AC power supply terminal unit 8 obtains the second AC power by removing the component, and the AC power supply terminal unit 8 receives the third power line communication information signal superimposed on the second AC power via the connected AC power line. The power line communication signal of The superposition separation unit 10 receives the third power line communication signal input from the AC power supply terminal unit 8, separates and outputs the third power line communication information signal, and the power line communication processing unit 5 The information signal is acquired and output from the third power line communication information signal output from the separation unit 10, and the storage unit 6 stores the information signal output from the power line communication processing unit 5 and stores it in the storage unit 6. When the information signal is transmitted through the commercial AC power line, the selection unit 9 selects the A side, receives the first AC power through the commercial AC power line, and performs signal superposition separation as an output destination. The unit 10 and the AC power supply terminal unit 8 are selected and output, the storage unit 6 reads the stored information signal, and the power line communication processing unit 5 converts the information signal read from the storage unit 6 into power line communication. Necessary processing is performed, and the fourth power line communication The signal superimposing / separating unit 10 superimposes the fourth power line communication information signal output from the power line communication processing unit 5 on the first AC power to generate the fourth power line communication signal. The selection unit 9 selects the A side, selects the fourth power line communication signal, and outputs it from the AC power input terminal unit 1 via the commercial AC power line.

  Thus, in the present embodiment, for example, the video signal stored in the recorder that is a power line communication compatible device connected to the AC power supply terminal unit 8 is a power line communication compatible device connected to the commercial AC power line. When uploading to an AV server, if a lot of noise is generated on the commercial AC power line and the transmission path state is poor, the power line communication device of this embodiment is connected to the AC power supply terminal unit 8. The video signal transmitted by being superimposed on the second AC power from which noise is removed is received from the recorder, which is a power line communication compatible device, via the signal superimposing / separating unit 10 and the power line communication processing unit 5, and once the power line communication is performed. After the necessary processing is solved, the video signal is accumulated in the storage unit 6, and then the processing necessary for power line communication is performed again via the power line communication processing unit 5 and the signal superimposing / separating unit 10. And, by the method as described at the prior art, while ensuring the reliability of data transmission, by superimposing a commercial AC power line, it can be transmitted without causing missing.

  In addition, although the case where the data received from the power line communication compatible device connected to the AC power supply terminal unit 8 and stored in the storage unit 6 is transmitted via the commercial AC power line has been described here, the commercial AC power line is used. The data to be transmitted may be data stored in the storage unit 6 in advance, or may be data reproduced from a medium such as a DVD.

  Note that the data received from the power line communication compatible device connected to the AC power supply terminal unit 8 may be a control signal for controlling the power line communication device of the present embodiment, and is not necessarily stored in the storage unit 6. There is no need.

  When both the commercial AC power line connected to the AC power input terminal unit 1 and the AC power line connected to the AC power supply terminal unit 8 have good transmission path conditions, the selection unit 9 is selected as the A side. The third power line received via the AC power line connected to the AC power supply terminal unit 8 by selecting the input from the AC power supply terminal unit 8 and switching the output to the commercial AC power line side You may control to transmit a communication signal directly to the commercial AC power line side.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 6)
FIG. 2 is also a diagram showing a schematic configuration of the power line communication device according to the sixth embodiment of the present invention.

  Hereinafter, the power line communication apparatus of Embodiment 6 of this invention is demonstrated using FIG.

  In the power line communication device according to the sixth embodiment of the present invention, a transmission line state detection unit (not shown) included in the power line communication processing unit 5 serves as a transmission line during the operation of the power line communication devices according to the fourth and fifth embodiments. The noise state of the AC power line being used is detected, and based on the detection result, the transmission method changing unit (not shown) included in the power line communication processing unit 5 selects the optimal transmission method for the transmission line. Perform transmission. Here, the detection method of the transmission path state and the determination method of the optimum transmission method are the same as the method described in the conventional example.

  Thus, in this embodiment, for each AC power line to be used, when the transmission line state is good, communication is performed using a method suitable for high-speed transmission, and when the transmission line state is poor, noise resistance is achieved. Communicates with a high method.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 7)
FIG. 3 is a diagram showing a schematic configuration of the power line communication device according to the seventh embodiment of the present invention, and the same components as those in FIG. 1 in the power line communication device according to the first embodiment of the present invention are given the same numbers. 11 is a first power line communication processing unit, 12 is a second power line communication processing unit, and 13 is a storage unit.

  Hereinafter, the power line communication apparatus of Embodiment 7 of this invention is demonstrated using FIG.

  In the power line communication device according to the seventh embodiment of the present invention, the first AC / signal superimposing / separating unit 2 receives the first power line communication signal in which the first power line communication information signal is superimposed on the first AC power. The signal is received from the AC power input terminal unit 1 via the commercial AC power line, separated into the first AC power and the first power line communication information signal and output, and the noise filter unit 7 performs the first AC / signal superposition. Information signals such as video signals, audio signals, and control signals are obtained by removing signal components in the frequency band used for power line communication from the first AC power output from the separation unit 2 to obtain second AC power. Is received and stored via the commercial AC power line, the second AC / signal superimposing / separating unit 3 outputs the second AC power output from the noise filter unit 7, and the AC power supply terminal The unit 8 outputs the second AC power to the external device. The first power line communication processing unit 11 acquires and outputs an information signal from the first power line communication information signal output from the first AC / signal superimposing / separating unit 2, and the storage unit 13 When storing the information signal output from the power line communication processing unit 11 and transmitting the information signal stored in the storage unit 13 from the AC power supply terminal unit 8, the storage unit 13 reads the stored information signal, The second power line communication processing unit 12 performs processing necessary for power line communication on the information signal read from the storage unit 13 to generate and output a second power line communication information signal. The signal superimposing / separating unit 3 superimposes the second power line communication information signal output from the second power line communication processing unit 12 on the second AC power to generate and output a second power line communication signal, AC power supply terminal unit 8 outputs the second power line communication signal. And outputs it to the equipment.

  Thus, in the present embodiment, for example, when a video signal stored in an AV server that is a power line communication compatible device connected to a commercial AC power line is viewed on a monitor that is also a power line communication compatible device, When a lot of noise is generated on the power line and the transmission line state is bad, the power line communication device of the present embodiment ensures the reliability of data transmission by the method described in the conventional example. After receiving the first AC / signal superimposing / separating unit 2 and the first power line communication processing unit 11 and solving the processing necessary for power line communication once, the video signal is accumulated in the storage unit 13. Then, processing necessary for power line communication is performed again via the second power line communication processing unit 12 and the second AC / signal superimposing / separating unit 3, and superimposed on the second AC power from which noise has been removed. By transmitting the monitor is connected to the power line communication compatible device to the supply terminal 8, you can view without causing erroneous display or missing video signal.

  In addition, although the case where the data received via the commercial AC power line and stored in the storage unit 13 is transmitted to the power line communication compatible device connected to the AC power supply terminal unit 8 has been described here, the power line communication compatible device is described. The data to be transmitted to may be data stored in the storage unit 13 in advance, or may be data reproduced from a medium such as a DVD.

  Note that the data received via the commercial AC power line may be a control signal for controlling the power line communication apparatus of the present embodiment, and is not necessarily stored in the storage unit 13.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 8)
FIG. 3 is also a diagram showing a schematic configuration of the power line communication apparatus according to the eighth embodiment of the present invention.

  Hereinafter, a power line communication apparatus according to an eighth embodiment of the present invention will be described with reference to FIG.

  In the power line communication device according to the eighth embodiment of the present invention, in addition to the operation of the power line communication device according to the seventh embodiment, information signals such as video signals, audio signals, and control signals are connected to the AC power supply terminal unit 8. In the case of receiving and storing via the AC power line, the AC power supply terminal unit 8 receives the third power line communication information signal superimposed on the second AC power via the connected AC power line. The second AC / signal superimposing / separating unit 3 receives the third power line communication signal input from the AC power supply terminal unit 8 and receives the second AC power and the third power line communication signal. The second power line communication processing unit 12 obtains an information signal from the third power line communication information signal output from the second AC / signal superposition / separation unit 3. The storage unit 13 outputs the second power line communication process. When the information signal output from the unit 12 is stored and the information signal stored in the storage unit 13 is transmitted via the commercial AC power line, the storage unit 13 reads the stored information signal, The power line communication processing unit 11 performs processing necessary for power line communication on the information signal read from the storage unit 13 to generate and output a fourth power line communication information signal, and the first AC / signal superposition separation The unit 2 superimposes the fourth power line communication information signal output from the first power line communication processing unit 11 on the first AC power, generates a fourth power line communication signal, and passes through the commercial AC power line. Output.

  As a result, in the present embodiment, for example, video signals stored in a recorder that is a power line communication compatible device connected to the AC power supply terminal unit 8 are converted into an AV that is a power line communication compatible device connected to a commercial AC power line. When uploading to the server, if a lot of noise is generated on the commercial AC power line and the transmission path state is bad, the power line communication device of this embodiment is connected to the AC power supply terminal unit 8. A video signal transmitted by being superimposed on the second AC power from which noise has been removed from a recorder that is a power line communication compatible device is transmitted via the second AC / signal superimposing / separating unit 3 and the second power line communication processing unit 12. After the processing necessary for the power line communication is solved and the video signal is accumulated in the storage unit 13, the first power line communication processing unit 11 again performs the first AC / signal superposition separation. 2 to perform processing necessary for power line communication, ensure reliability of data transmission by the method described in the conventional example, and then superimpose it on the commercial AC power line to transmit without loss can do.

  In addition, although the case where the data received from the power line communication-compatible device connected to the AC power supply terminal unit 8 and stored in the storage unit 13 is transmitted via the commercial AC power line has been described here, the commercial AC power line is used. The data to be transmitted may be data stored in the storage unit 13 in advance, or may be data reproduced from a medium such as a DVD.

  Note that the data received from the power line communication compatible device connected to the AC power supply terminal unit 8 may be a control signal for controlling the power line communication device of the present embodiment, and is not necessarily stored in the storage unit 13. There is no need.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 9)
FIG. 3 is also a diagram showing a schematic configuration of the power line communication device according to the ninth embodiment of the present invention.

  Hereinafter, the power line communication apparatus according to the ninth embodiment of the present invention will be described with reference to FIG.

  The power line communication device according to the ninth embodiment of the present invention is included in the first power line communication processing unit 11 and the second power line communication processing unit 12 during the operation of the power line communication devices according to the seventh and eighth embodiments. A transmission line state detection unit (not shown) detects a noise state of the AC power line used as a transmission line, and the first power line communication processing unit 11 and the second power line communication processing are similarly performed based on the detection result. Transmission unit changing unit (not shown) included in unit 12 selects the most suitable transmission method for the transmission path and performs transmission. Here, the detection method of the transmission path state and the determination method of the optimum transmission method are the same as the method described in the conventional example.

  Thus, in this embodiment, for each AC power line to be used, when the transmission line state is good, communication is performed using a method suitable for high-speed transmission, and when the transmission line state is poor, noise resistance is achieved. Communicates with a high method.

  As described above, according to the present embodiment, it is possible to realize a power line communication device capable of transmitting a normal information signal even when a commercial AC power line having a poor transmission path state is used.

(Embodiment 10)
FIG. 3 also shows a schematic configuration of the power line communication device according to the tenth embodiment of the present invention.

  Hereinafter, the power line communication apparatus of Embodiment 10 of this invention is demonstrated using FIG.

  In the power line communication device according to the tenth embodiment of the present invention, writing from the first power line communication processing unit 11 to the storage unit 13 during the operation of the power line communication devices according to the seventh, eighth, and ninth embodiments. Operation, read operation from storage unit 13 to second power line communication processing unit 12, write operation from second power line communication processing unit 12 to storage unit 13, and first power line communication processing unit from storage unit 13 11 can be performed simultaneously.

  As a result, in the present embodiment, the video signal accumulated from the other AC power line can be transmitted simultaneously while receiving the video signal from one AC power line by power line communication.

  As described above, according to the present embodiment, it is possible to start transmission to the other AC power line without waiting until reception from one AC power line is completed.

  The power line communication apparatus according to the present invention can be used simply by connecting to an AC power line, and even when a commercial AC power line that changes from moment to moment is used as a transmission line, transmission by power line communication is possible without loss of data. In the case where high speed is required, such as viewing of a video signal, transmission by power line communication can be performed using an AC power line that is noise-separated from a commercial AC power line. It is also useful as a relay device for power line communication.

The figure explaining schematic structure of the power line communication apparatus in Embodiment 1 thru | or Embodiment 3 of this invention The figure explaining schematic structure of the power line communication apparatus in Embodiment 4 thru | or Embodiment 6 of this invention The figure explaining schematic structure of the power line communication apparatus in Embodiment 7 thru | or Embodiment 10 of this invention The figure explaining schematic structure of the conventional power line communication apparatus The figure explaining a mode that a power line communication information signal is superimposed on AC power

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 AC power input terminal part 2 1st AC / signal superimposition separation part 3 2nd AC / signal superposition separation part 4, 9 Selection part 5 Power line communication processing part 6, 13 Storage part 7 Noise filter part 8 AC power supply terminal Unit 10 signal superimposing / separating unit 11 first power line communication processing unit 12 second power line communication processing unit

Claims (14)

In a power line communication apparatus that transmits information signals such as video signals, audio signals, and control signals via an AC power line that supplies power, the AC power line connection unit includes a plurality of AC power line connection units connected to the AC power line. At least one of them can transmit a power line communication signal obtained by superimposing a power line communication information signal on which the processing necessary for power line communication is performed on the information signal to AC power from which a signal component in a frequency band used for power line communication is removed. A power line communication device. First and second AC power line connection units connected to an AC power line, first and second AC / signal superimposing / separating units for separating or superimposing AC power and a power line communication information signal, and the power line communication information signal A selection unit that selects an output destination, a power line communication processing unit that extracts an information signal from the power line communication information signal or performs processing necessary for power line communication on the information signal, and a storage unit that stores the information signal, The power line communication apparatus according to claim 1, further comprising a noise filter unit that removes noise from the AC power. When information signals such as video signals, audio signals, and control signals are received and stored via a commercial AC power line connected to the first AC power line connection unit, the first AC / signal superimposing / separating unit is A first power line communication signal obtained by superimposing a first power line communication information signal on the first AC power is received from the commercial AC power line via the first AC power line connection unit; AC power and the first power line communication information signal are separated and output, and the noise filter unit is used for power line communication from the first AC power output from the first AC / signal superposition / separation unit. The signal component in the frequency band is removed and output as the second AC power to the second AC / signal superimposing / separating unit, and the selecting unit is configured to output the first AC / signal superimposing / separating unit from the first AC / signal superimposing / separating unit. Select 1 power line communication information signal Output to the power line communication processing unit, the power line communication processing unit obtains a first information signal from the first power line communication information signal output from the selection unit, and outputs the first information signal to the storage unit, the storage unit Storing the first information signal;
When transmitting the first information signal stored in the storage unit from the second AC power line connection unit,
The storage unit reads the stored first information signal and outputs the first information signal to the power line communication processing unit, and the power line communication processing unit performs a process necessary for power line communication on the first information signal to generate a second information signal. The power line communication information signal is output to the selection unit, and the selection unit selects and outputs the second AC / signal superposition separation unit as the output destination of the second power line communication information signal, and the second The AC / signal superimposing / separating unit superimposes the second power line communication information signal on the second AC power and outputs the second power line communication information signal as the second power line communication signal via the second AC power line connecting unit. The power line communication apparatus according to claim 2. When receiving and storing information signals such as video signals, audio signals, and control signals via the AC power line connected to the second AC power line connection unit, the information signal is transmitted via the second AC power line connection unit. The third power line communication signal in which the third power line communication information signal is superimposed on the second AC power is input, and the second AC / signal superposition separation unit is input from the second AC power line connection unit The third power line communication signal is received, separated into the second AC power and the third power line communication information signal and output, and the selection unit outputs from the second AC / signal superposition separation unit The selected third power line communication information signal is output to a power line communication processing unit, and the power line communication processing unit outputs a second information signal from the third power line communication information signal output from the selection unit. Is acquired and output to the storage unit, the storage unit Storing said second information signal,
When transmitting the second information signal stored in the storage unit via a commercial AC power line, the storage unit reads out the stored second information signal and outputs it to the power line communication processing unit. The power line communication processing unit performs processing necessary for power line communication on the second information signal, and outputs the second information signal to the selection unit as a fourth power line communication information signal. The selection unit includes the fourth power line. The first AC / signal superimposing / separating unit is selected and output as the output destination of the communication information signal, and the first AC / signal superimposing / separating unit converts the fourth power line communication information signal to the first AC power. The power line communication apparatus according to claim 2, wherein the power line communication apparatus outputs the fourth power line communication signal as a fourth power line communication signal via the first AC power line connection unit. A power line communication processing unit detects a transmission line state of an AC power line used for power line communication from an input power line communication information signal, and when the transmission line state of the AC power line is good, a method suitable for high-speed transmission 5. The power line communication apparatus according to claim 2, wherein communication is performed using a method with high noise resistance when the transmission path state of the AC power line is poor. . Separating the AC power and the power line communication information signal, a first and second AC power line connection unit connected to the AC power line, a selection unit for selecting the output destination of the superimposed AC power and the power line communication information signal, and the AC power and the power line communication information signal Alternatively, a signal superimposing / separating unit to superimpose, a power line communication processing unit that extracts an information signal from the power line communication information signal or performs processing necessary for power line communication on the information signal, a storage unit that stores the information signal, and the AC The power line communication apparatus according to claim 1, further comprising a noise filter unit that removes noise from the power. When information signals such as video signals, audio signals, and control signals are received and stored via the commercial AC power line connected to the first AC power line connection unit, the selection unit uses the first AC power. The first power line communication signal on which the first power line communication information signal is superimposed is received from the commercial AC power line via the first AC power line connection unit, and the signal superimposing separation unit and the second An AC power line connection unit is selected and output, and the second AC power line connection unit outputs the first power line communication signal to an external device,
The signal superimposing / separating unit separates and outputs the first power line communication information signal from the first power line communication signal output from the selecting unit, and the power line communication processing unit is supplied from the signal superimposing / separating unit. Obtaining and outputting the first information signal from the output first power line communication information signal, the storage unit stores the first information signal output from the power line communication processing unit,
When the first information signal stored in the storage unit is transmitted from the second AC power line connection unit, the selection unit transmits the first power line communication signal or the first AC power to the first AC signal. The first AC power line received from the commercial AC power line via the first AC power line connection unit, the noise filter unit selected as an output destination and output, and the noise filter unit output the first power line output from the selection unit The signal component in the frequency band used for power line communication is removed from the communication signal or the first AC power to obtain the second AC power, and the storage unit reads the stored first information signal The power line communication processing unit performs processing necessary for power line communication on the first information signal read from the storage unit, generates a second power line communication information signal, and outputs the second power line communication information signal. The separation unit is The second power line communication information signal output from the power line communication processing unit is superimposed on the second AC power to generate and output a second power line communication signal, and the second AC power line connection unit 7. The power line communication apparatus according to claim 6, wherein the second power line communication signal is output to an external device. When the information signal such as the video signal, the audio signal, and the control signal is received and stored via the AC power line connected to the second AC power line connection unit, the selection unit receives the first signal from the commercial AC power line. The first power line communication signal or the first AC power is received via the AC power line connection unit, and a noise filter unit is selected and output as an output destination, and the noise filter unit is output from the selection unit Removing a signal component in a frequency band used for power line communication from the first power line communication signal or first AC power to obtain second AC power;
The second AC power line connection unit receives a third power line communication signal in which a third power line communication information signal is superimposed on the second AC power via the connected AC power line, and superimposes the signal. The separation unit receives the third power line communication signal input from the second AC power line connection unit, separates and outputs the third power line communication information signal, and the power line communication processing unit A second information signal is acquired and output from the third power line communication information signal output from the signal superimposing / separating unit, and the storage unit stores the second information signal output from the power line communication processing unit. And
When transmitting the second information signal stored in the storage unit via the commercial AC power line, the selection unit receives the first AC power via the commercial AC power line, The signal superimposing / separating unit and the second AC power line connection unit are selected and output as output destinations, the storage unit reads the stored second information signal, and the power line communication processing unit is the storage unit The second information signal read from is subjected to processing necessary for power line communication to generate and output a fourth power line communication information signal, and the signal superimposing / separating unit outputs from the power line communication processing unit The fourth power line communication information signal thus generated is superimposed on the first AC power, a fourth power line communication signal is generated and output to the selection unit, and the selection unit is configured to output the fourth power line communication signal. A signal is selected and the first AC power Power line communication apparatus according to claim 6, wherein the output from the connecting section through said commercial AC power line. A power line communication processing unit detects a transmission line state of an AC power line used for power line communication from an input power line communication information signal, and when the transmission line state of the AC power line is good, a method suitable for high-speed transmission The power line communication apparatus according to any one of claims 6 to 8, wherein communication is performed using a method with high noise resistance when the transmission path state of the AC power line is poor. . First and second AC power line connection units connected to an AC power line, first and second AC / signal superimposing / separating units for separating or superimposing AC power and a power line communication information signal, and the power line communication information signal First and second power line communication processing units for extracting an information signal from the information signal or performing processing necessary for power line communication on the information signal, a storage unit for storing the information signal, and a noise filter for removing noise from the AC power The power line communication apparatus according to claim 1, further comprising a unit. When information signals such as video signals, audio signals, and control signals are received from the commercial AC power line via the first AC power line connection unit and stored, the first AC / signal superimposing / separating unit A first power line communication signal obtained by superimposing a first power line communication information signal on AC power is received from the commercial AC power line via the first AC power line connection unit, and the first AC power and the The noise filter unit outputs the first power line communication information signal separated from the first AC power output from the first AC / signal superimposing / separating unit within a frequency band used for power line communication. Removing the signal component to obtain the second AC power;
The second AC / signal superimposing / separating unit outputs the second AC power output from the noise filter unit to a second AC power line connecting unit, and the second AC power line connecting unit includes the second AC power line connecting unit. The first power line communication processing unit obtains a first information signal from the first power line communication information signal output from the first AC / signal superposition / separation unit. And the storage unit stores the first information signal output from the first power line communication processing unit,
When the first information signal stored in the storage unit is transmitted from the second AC power line connection unit, the storage unit reads out the stored first information signal, and the second power line The communication processing unit performs processing necessary for power line communication on the first information signal read from the storage unit, generates and outputs a second power line communication information signal, and outputs the second AC / The signal superimposing / separating unit superimposes the second power line communication information signal output from the second power line communication processing unit on the second AC power to generate and output a second power line communication signal. The power line communication apparatus according to claim 10, wherein the second AC power line connection unit outputs the second power line communication signal to an external device. When information signals such as video signals, audio signals, and control signals are received and stored via the AC power line connected to the second AC power line connection unit, the second AC power line connection unit is connected. The third power line communication signal obtained by superimposing the third power line communication information signal on the second AC power is input through the AC power line thus generated, and the second AC / signal superimposing separation unit Receiving the third power line communication signal input from the AC power line connection unit, separating the second AC power and the third power line communication information signal, and outputting the second power line communication signal. Obtains and outputs the second information signal from the third power line communication information signal output from the second AC / signal superimposing / separating unit, and the storage unit receives from the second power line communication processing unit. Storing the output second information signal; When the second information signal stored in the unit is transmitted through a commercial AC power line, the storage unit reads the stored second information signal, and the first power line communication processing unit The second information signal read from the storage unit is subjected to processing necessary for power line communication to generate and output a fourth power line communication information signal. The fourth power line communication information signal output from the first power line communication processing unit is superimposed on the first AC power to generate a fourth power line communication signal, and the first AC power line connection unit A power line communication apparatus, characterized in that it outputs via a commercial AC power line. The first and second power line communication processing units detect the transmission path state of the AC power line used for power line communication from the input power line communication information signal, and when the transmission path state of the AC power line is good, 13. The communication according to any one of claims 10 to 12, wherein communication is performed by a method suitable for high-speed transmission, and communication is performed by a method with high noise resistance when the transmission path state of the AC power line is poor. A power line communication device according to claim 1. Write operation from the first power line communication processing unit to the storage unit, read operation from the storage unit to the second power line communication processing unit, write operation from the second power line communication processing unit to the storage unit, and The power line communication apparatus according to claim 10, wherein a read operation from a storage unit to the first power line communication processing unit can be performed simultaneously.

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