JP5734644B2 - Broadcast receiving apparatus and broadcasting system using the broadcast receiving apparatus - Google Patents

Description

  The present invention relates to a broadcast receiver capable of receiving a multi-channel broadcast composed of a satellite broadcast and a broadcast other than the satellite broadcast, a receiving station provided with the broadcast receiver, and a satellite broadcast and a broadcast other than the satellite broadcast. The present invention relates to a broadcasting system including a transmission station capable of transmitting a multi-channel broadcast.

  Radio waves in the ultra-high frequency band used for satellite telecommunications lines are likely to be disturbed by lightning and rain. For this reason, it has been difficult to view satellite broadcasts during time periods such as in the evening or during periods when typhoons and thunderstorms continue. For example, a broadcast receiving device described in Japanese Patent Application Laid-Open No. 2008-236236 is a similar program that is broadcast by another broadcast station that belongs to the same series as the currently receiving broadcast station when the reception sensitivity decreases. And re-broadcast of the same program is reserved using the electronic program guide. This makes it possible to view a program that was difficult to view due to a reception failure.

JP 2008-236236 A

  However, communication satellites used for satellite broadcasting usually cover the whole of Japan as a single unit, and broadcast the same content all over the country at the same time. For this reason, there is no affiliated station network consisting of a plurality of broadcast stations like terrestrial television broadcasts, so that a program in which a reception failure has occurred is a program broadcast by another affiliated station, such as the above-mentioned broadcast receiver. It cannot be substituted. In addition, when a broadcast program is interrupted due to a reception failure in the middle of the program, it is possible to view it continuously without recognizing the interruption of the broadcast program, rather than watching the re-broadcast program again. Is preferred.

Therefore, the problem to be solved by the present invention is that, first, when a reception failure occurs in a program transmitted by a broadcasting means by satellite, it is possible to instantaneously and automatically switch to another broadcasting means, It is an object of the present invention to provide a broadcast receiving apparatus that can continuously watch a broadcast program.
Secondly, a broadcasting system comprising a plurality of receiving stations having the broadcast receiving device and at least one transmitting station for transmitting a single program to the receiving station by a plurality of broadcasting means, and broadcasting means by satellite For one receiving station under the influence of the reception failure that occurred in the program transmitted in, another program with the same content without the reception failure from the transmitting station or another receiving station that is not under the influence of the reception failure A broadcasting system that transmits or forwards separately and instantaneously replaces the other program with a program broadcast on one receiving station so that it appears as if no reception failure has occurred on the one receiving station. The purpose is to provide.

The broadcast receiving apparatus according to claim 1 is a broadcast receiving apparatus capable of receiving a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast,
Receiving means for dividing the received multi-channel broadcast for each channel;
Video / audio signals related to broadcasting divided for each channel are encoded in a predetermined compression format, or video / audio signals compressed in a different compression format for each received broadcast are replaced with the predetermined compression format and input. Encoding means for encoding the video / audio signal related to the broadcast to be aligned with the video / audio signal conforming to the predetermined compression format;
Modulation means for modulating each channel according to a predetermined modulation format so as not to cause interference when the broadcast composed of the video / audio signal encoded by the encoding means is output;
In a broadcast receiving apparatus comprising: output means for outputting a broadcast modulated by the modulation means and modulated so as to be output for each channel to a terminal according to a predetermined output format, or for recording and saving to an external recording medium ,
The receiving means simultaneously receives a program having the same content as the program by the satellite broadcast by a broadcast other than the satellite broadcast,
A switching means is provided between the output side of the encoding means and the input side of the modulation means,
The switching means is
A main circuit in which a video / audio signal related to the satellite broadcast is transmitted and a main broadcast is formed by processing the video / audio signal in a predetermined compression format;
A slave circuit that transmits a video / audio signal related to a broadcast other than the satellite broadcast and forms a slave broadcast in which the video / audio signal is processed in a predetermined compression format,
Switch as quickly as possible according to the prescribed conditions,
In the main circuit and the sub circuit,
Detecting means for detecting noise mixed in the main circuit or the sub circuit;
Recording means for sequentially recording the noise and forming a recording result;
Prediction means for predicting the time when the noise exceeds a predetermined threshold based on the increase or decrease of the noise recorded in the recording result, and forming a prediction result;
While determining whether or not the noise of the main circuit measured by the detection means exceeds a predetermined threshold, and outputs a switching signal to the switching means,
When reaching the time predicted by said prediction result, said in case the noise of the main circuit actually measured by the detecting means exceeds a predetermined threshold value, the pre-switching signal to said switching means for actuating rapidly said switching means And determining means for outputting
When a reception failure occurs in a program composed of video / audio signals transmitted through the main circuit due to noise mixed in the main circuit ,
Based on the switching signal or the pre-switching signal output by the determination means,
The switching means, when the noise of the main circuit measured by the detection means exceeds a predetermined threshold, or when the predicted time is reached,
It is characterized in that the program is switched as quickly as possible to a program comprising a video / audio signal transmitted through the slave circuit.

The broadcast receiving device according to claim 2 is the invention according to claim 1, wherein at least one main input terminal is provided on an input end side of the main circuit,
At least one, preferably two or more slave input terminals are provided on the input end side of the slave circuit,
When the noise mixed in the main circuit does not exceed the threshold, the switching means is connected to the main circuit,
The video / audio signal related to the satellite broadcast input to the main input terminal is preferentially output as compared with the video / audio signal related to a broadcast other than the satellite broadcast input to the slave input terminal. It is characterized by that.

The broadcast receiving device according to claim 3 provides an emergency evacuation circuit between the switching means and the external recording medium in the invention according to claim 1 or 2,
In the determination means, it is determined that any noise mixed in the main circuit and the sub circuit exceeds a predetermined threshold,
When a program consisting of video / audio signals transmitted through the main circuit and the sub circuit becomes unviewable due to reception failure,
The switching means automatically switches from the main circuit or the sub circuit to the emergency evacuation circuit as quickly as possible,
The program recorded and stored in the external recording medium is output from the output means.

The broadcast system according to claim 4, wherein at least one transmission station having a facility for transmitting a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast;
At least one, preferably two or more receiving stations, having facilities for receiving the multi-channel broadcast;
It consists of a communication satellite that relays the satellite broadcast,
A broadcasting system in which the satellite broadcast transmitted from the transmitting station is relayed by the communication satellite, and the receiving station simultaneously receives the same content,
The receiving station includes a broadcast receiving device that receives the broadcast, and a plurality of terminals that have a monitor that can view a program output from the broadcast receiving device.
The broadcast receiving device is:
A broadcast receiving apparatus capable of receiving a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast,
Receiving means for dividing the received multi-channel broadcast for each channel;
Video / audio signals related to broadcasting divided for each channel are encoded in a predetermined compression format, or video / audio signals compressed in a different compression format for each received broadcast are replaced with the predetermined compression format and input. Encoding means for encoding the video / audio signal related to the broadcast to be aligned with the video / audio signal conforming to the predetermined compression format;
Modulation means for modulating each channel according to a predetermined modulation format so as not to cause interference when the broadcast composed of the video / audio signal encoded by the encoding means is output;
In a broadcast receiving apparatus comprising: output means for outputting a broadcast modulated by the modulation means and modulated so as to be output for each channel to a terminal according to a predetermined output format, or for recording and saving to an external recording medium ,
The receiving means simultaneously receives a program having the same content as the program by the satellite broadcast by a broadcast other than the satellite broadcast,
A switching means is provided between the output side of the encoding means and the input side of the modulation means,
The switching means is
A main circuit in which a video / audio signal related to the satellite broadcast is transmitted and a main broadcast is formed by processing the video / audio signal in a predetermined compression format;
A slave circuit that transmits a video / audio signal related to a broadcast other than the satellite broadcast and forms a slave broadcast in which the video / audio signal is processed in a predetermined compression format,
Switch as quickly as possible according to the prescribed conditions,
In the main circuit and the sub circuit,
Detecting means for detecting noise mixed in the main circuit or the sub circuit;
Recording means for sequentially recording the noise and forming a recording result;
Prediction means for predicting the time when the noise exceeds a predetermined threshold based on the increase or decrease of the noise recorded in the recording result, and forming a prediction result;
While determining whether or not the noise of the main circuit measured by the detection means exceeds a predetermined threshold, and outputs a switching signal to the switching means,
When reaching the time predicted by said prediction result, said in case the noise of the main circuit actually measured by the detecting means exceeds a predetermined threshold value, the pre-switching signal to said switching means for actuating rapidly said switching means And determining means for outputting
When a reception failure occurs in a program composed of video / audio signals transmitted through the main circuit due to noise mixed in the main circuit ,
Based on the switching signal or the pre-switching signal output by the determination means,
The switching means, when the noise of the main circuit measured by the detection means exceeds a predetermined threshold, or when the predicted time is reached,
Configured to switch as quickly as possible to the program consisting of video and audio signals to transmit the sub circuit,
Even when the satellite broadcast the program received by could not viewed on the monitor by the reception failure, and outputs the program received by the broadcasting other than the satellite to the terminal,
The program can be viewed continuously without noise on the monitor .

The broadcast system according to claim 5 is the invention according to claim 4, wherein at least one main input terminal is provided on an input end side of the main circuit of the broadcast receiving device,
At least one, preferably two or more slave input terminals are provided on the input end side of the slave circuit,
When the noise mixed in the main circuit does not exceed the threshold, the switching means is connected to the main circuit,
The video / audio signal related to the satellite broadcast input to the main input terminal is preferentially output as compared with the video / audio signal related to a broadcast other than the satellite broadcast input to the slave input terminal. It is characterized by that.

The broadcast system according to claim 6 is the invention according to claim 4 or 5, wherein an emergency evacuation circuit is provided between the switching means of the broadcast receiving device and the external recording medium,
In the determination means, it is determined that any noise mixed in the main circuit and the sub circuit exceeds a predetermined threshold,
When a program consisting of video / audio signals transmitted through the main circuit and the sub circuit becomes unviewable due to reception failure,
The switching means automatically switches from the main circuit or the sub circuit to the emergency evacuation circuit as quickly as possible,
The program recorded and stored in the external recording medium is output from the output means.

The broadcast system according to claim 7 is the invention according to any one of claims 4 to 6, wherein a wide-area communication network including the transmitting station and the receiving stations is provided.
On the wide-area communication network, video / audio signals related to broadcasting other than the satellite broadcasting are transmitted from the transmitting station to the receiving station,
The broadcast receiving device that has received the video / audio signal related to the broadcast other than the satellite broadcast outputs the video / audio signal related to the broadcast other than the satellite broadcast substantially simultaneously,
A program comprising video / audio signals related to broadcasts other than the satellite broadcast is played back as much as possible on the terminal.

The broadcast system according to claim 8 is the broadcasting system according to any one of claims 4 to 7, wherein the transmitting station and each receiving station have a unique identification code,
Among the receiving stations, one receiving station arranged in the area where the reception failure has occurred sends a distribution request in which the identification code is embedded to the transmission station or an area other than the area where the reception failure occurs When transmitting to other receiving stations arranged in
The transmitting station or the other receiving station that has received the distribution request specifies the one receiving station that has transmitted the distribution request, and transmits a program composed of video / audio signals related to broadcasting other than the satellite broadcasting. And
The broadcast receiving device of the one receiving station that has received a program composed of video / audio signals related to broadcasts other than the satellite broadcasts outputs video / audio signals related to broadcasts other than the satellite broadcasts substantially simultaneously,
A program comprising video / audio signals related to broadcasts other than the satellite broadcast is played back as much as possible on the terminal.

The broadcast system according to claim 9 is the broadcasting system according to claim 8, wherein the identification code is a private identification code encrypted in a predetermined format.
When the transmitting station or the other receiving station returns a program composed of video / audio signals related to broadcasts other than the satellite broadcast to the one receiving station that has transmitted the distribution request in which the private identification code is embedded. ,
The transmitting station or the other receiving station encrypts and transmits a program composed of video / audio signals related to broadcasting other than the satellite broadcasting,
The broadcast receiving device of the one receiving station that has received the program composed of the video / audio signal related to the broadcast other than the satellite broadcast, when the program is encoded by the encoding means, Decrypting the code and outputting video / audio signals related to broadcasts other than the satellite broadcast almost simultaneously,
The encrypted program including the video / audio signal related to the broadcast other than the satellite broadcast is reproduced as much as possible on the terminal.

A broadcasting system according to claim 10 is the invention according to claim 4, wherein the transmitting station and each receiving station are connected by a terrestrial digital TV line,
On the terrestrial digital TV line, video / audio signals related to broadcasting other than satellite broadcasting are transmitted from the transmitting station to the receiving station,
The broadcast receiving device that has received the video / audio signal related to the broadcast other than the satellite broadcast outputs the video / audio signal related to the broadcast other than the satellite broadcast substantially simultaneously,
A program comprising video / audio signals related to broadcasts other than the satellite broadcast is played back as much as possible on the terminal.

According to the broadcast receiving apparatus of claim 1, a main circuit to which a video / audio signal related to satellite broadcast is input and a slave circuit to which a video / audio signal related to broadcast other than satellite broadcast is input are provided. When a reception failure occurs in satellite broadcasting, the main circuit is automatically switched to the subcircuit as quickly as possible. In addition, a program having the same content as a program transmitted by satellite broadcast is transmitted simultaneously by a broadcast other than satellite broadcast.
As a result, when a reception failure occurs in satellite broadcasting due to bad weather, etc., and the program being broadcast cannot be viewed, the broadcast receiving device instantly and automatically changes the program input destination to a broadcast other than satellite broadcast. You can switch to Therefore, in the terminal to which the program is supplied from the broadcast receiving device, it is possible to prevent the program being viewed from being interrupted due to a reception failure.

According to the broadcast receiving device of claim 2, a main circuit to which a video / audio signal related to satellite broadcast is input and a sub-circuit to which a video / audio signal related to broadcast other than satellite broadcast is input are provided. The main circuit is provided with at least one main input terminal, and the sub circuit is provided with at least one, preferably two or more sub input terminals.
Further, the switching means of the broadcast receiving apparatus basically maintains the connection to the main circuit unless a reception failure occurs in the satellite broadcast.
As a result, the main circuit can be preferentially used with respect to the slave circuit.
In addition, a plurality of secondary input terminals for inputting video / audio signals related to broadcasting other than satellite broadcasting are provided.
Thereby, the connector of the slave input terminal can be formed so as to comply with standards corresponding to different communication lines such as an Internet line, a terrestrial digital TV line, and a telephone line.
Therefore, while a satellite broadcast program is preferentially aired, a program other than the satellite broadcast can be run in the background via a plurality of communication lines.
Therefore, when a reception failure occurs in satellite broadcasting due to bad weather, etc., and the program being broadcast cannot be viewed, the broadcast receiving device plays the satellite broadcast program preferentially broadcast in the background. It is possible to instantaneously and automatically switch to an optimum program selected from a plurality of broadcast programs other than satellite broadcasts. Therefore, in the terminal to which the program is supplied from the broadcast receiving device, it is possible to prevent the program being viewed from being interrupted due to a reception failure.

According to the broadcast receiving apparatus of claim 3, the broadcast receiving apparatus is provided with an external recording medium that records and saves video content such as a movie or a program, and the external recording medium and the switching means are connected by an emergency evacuation circuit. Thus, when both the satellite broadcast program and the non-satellite program can no longer be viewed due to reception failure, the video content recorded and stored in the external recording medium is called out and output.
As a result, reception failure occurs in satellite broadcasting due to bad weather, etc., and reception failure occurs in broadcasts other than satellite broadcasting due to accidents due to bad weather or disconnection, etc., and the broadcast receiving device may receive the program being broadcast. When it becomes impossible, the broadcast receiving apparatus can instantaneously and automatically switch the program input destination from the outside to the external recording medium of the broadcast receiving apparatus. Therefore, in the terminal to which the program is supplied from the broadcast receiving device, it is possible to prevent the program being viewed from being interrupted due to a reception failure.

According to the broadcast system of the fourth aspect, the receiving station has the broadcast receiving apparatus of the first aspect.
As a result, when a reception failure occurs in satellite broadcasting due to bad weather, etc., and the program being broadcast cannot be viewed, the broadcast receiving device instantly and automatically changes the program input destination to a broadcast other than satellite broadcast. You can switch to Therefore, the terminal to which the program is supplied from the broadcast receiving apparatus can prevent the program being viewed from being interrupted due to a reception failure, and a reception failure occurs in the receiving station as if the program is being broadcast. You can make it look like it is not.

According to the broadcast system of the fifth aspect, the receiving station has the broadcast receiving apparatus according to the first or second aspect.
As a result, the receiving station can preferentially broadcast a program by satellite broadcast to a program by broadcast other than satellite broadcast.
In addition, the receiving station can receive broadcasts other than satellite broadcasts with different communication standards, such as Internet lines, terrestrial digital TV lines, and telephone lines, and satellite broadcast programs are preferentially broadcast. During this period, programs other than satellite broadcasts can be run in the background via a plurality of communication lines.
Therefore, when a reception failure occurs in satellite broadcasting due to bad weather, etc., and the program being broadcast cannot be viewed, the broadcast receiving device plays the satellite broadcast program preferentially broadcast in the background. It is possible to instantaneously and automatically switch to an optimum program selected from a plurality of broadcast programs other than satellite broadcasts. Therefore, the terminal to which the program is supplied from the broadcast receiving apparatus can prevent the program being viewed from being interrupted due to a reception failure, and a reception failure occurs in the receiving station as if the program is being broadcast. You can make it look like it is not.
Furthermore, by dividing a program by broadcasting other than satellite broadcasting into a plurality of lines, even if one of the communication lines is disconnected, an accident such as disconnection occurs by selecting another line. Can diversify risks.

According to the broadcast system of the sixth aspect, the receiving station has the broadcast receiving apparatus according to any one of the first to third aspects.
As a result, reception failure occurs in satellite broadcasting due to bad weather, etc., and reception failure occurs in broadcasts other than satellite broadcasting due to accidents due to bad weather or disconnection, etc., and broadcasts can be received via any communication line When the receiving station cannot receive the program being broadcast, the broadcast receiving device in the receiving station instantly inputs the program input destination from the receiving station to the external recording medium of the broadcast receiving device. And can switch automatically. Therefore, the terminal to which the program is supplied from the broadcast receiving apparatus can prevent the program being viewed from being interrupted due to a reception failure, and a reception failure occurs in the receiving station as if the program is being broadcast. You can make it look like it is not.

According to the broadcast system of the seventh aspect, a wide area communication network is formed from the transmitting station and each receiving station using the Internet line. Therefore, streaming transmission from a transmitting station to each receiving station can be performed using a wide-area communication network as a communication line for video / audio signals related to broadcasting other than satellite broadcasting.
As a result, a program having the same content as the program can be distributed to a plurality of receiving stations via the wide area communication network instead of the program by satellite broadcasting. Here, even if the Internet link between the transmitting station and the one receiving station where the reception failure has occurred is disconnected, the program transmitted from the transmitting station to the other receiving station where the receiving failure has not occurred is received as one. It is possible to transfer to a station by bypassing another route of the wide area communication network.
For this reason, even if there is a reception failure or disconnection of the Internet line, it is possible for one receiving station to make it appear as if the program being broadcast is not affected by the reception failure or disconnection.

According to the broadcast system described in claim 8, a unique identification code is set in each of the transmitting station and each receiving station connected to the wide area communication network, and the identification code is embedded in the distribution request.
As a result, the receiving station that issued the distribution request can be easily specified, and the program for which the distribution request has been made can be automatically distributed to the receiving station.
In addition, the reception station that issued the distribution request indicates that a reception failure has occurred, such as weather information, from the receiving station that issued the distribution request as an alarm or warning, to the transmitting station or other nearby receiving stations. Can be delivered. For this reason, for example, by inputting a reception failure alarm or warning information to the prediction means provided in the broadcast receiving apparatus, it is possible to assist in predicting the occurrence of subsequent reception failures.

  According to the broadcasting system of the ninth aspect, the distribution request and the program distributed in response to the distribution request are both encrypted and kept private. Thus, even when a receiving station other than the receiving station that has issued the distribution request receives an encrypted program transmitted over the wide area communication network, the terminal can be prevented from being viewed on the terminal. Therefore, it is possible to easily realize membership-based broadcasting that restricts viewing by a person other than a specific person.

According to the broadcast system of claim 10, when a reception failure occurs in satellite broadcasting, it is automatically switched as much as possible to terrestrial digital television broadcasting so that no reception failure appears. Can do.
Also, if the program entered using the vacant channels of digital terrestrial television broadcasting is broadcast on each terminal, the conventional indoor wiring can be used effectively, and there is no need to install new equipment. New installation costs can be reduced.

It is a block diagram which shows the outline of a structure of the broadcast receiver which concerns on 1st Example. It is a block diagram which shows the outline of a structure of the receiving station which has the broadcast receiver which concerns on 1st Example. It is a block diagram which shows the outline of a structure of the broadcast system provided with the receiving station which has the broadcast receiver which concerns on 1st Example.

An embodiment relating to a broadcast system comprising a broadcast receiving apparatus according to the present invention, a receiving station equipped with the broadcast receiving apparatus, and a transmitting station will be described with reference to the accompanying drawings.
FIG. 1 shows an outline of a configuration of a broadcast receiving apparatus according to the present embodiment, FIG. 2 shows an outline of a configuration of a receiving station having the broadcast receiving apparatus according to the present embodiment, and FIG. 3 shows a broadcast according to the present embodiment. The outline of the structure of the broadcast system provided with the receiving station which has a receiver is shown.

As shown in FIG. 1, the broadcast receiving apparatus 10 includes a plurality of input terminals 12 and at least one output terminal 13 in the apparatus main body 11.
By arranging a plurality of input terminals 12 in the apparatus main body 11, it is possible to simultaneously receive a program based on satellite broadcasting and a program based on broadcasting other than satellite broadcasting.
Further, at least one output terminal 13 arranged in the apparatus main body 11 is connected to a distributor 53 as shown in FIG. The distributor 53 can simultaneously distribute to a predetermined number of terminals 50.

The input terminal 12 includes a main input terminal 12a and a sub input terminal 12b. As will be described later, the broadcast input to the main input terminal 12a is preferentially output from the output terminal 13 to the sub input terminal 12b.
At least one main input terminal 12 a is formed in the apparatus main body 11.
In this embodiment, satellite broadcast is input to the main input terminal 12a as will be described later. Therefore, it is preferable that the main input terminal 12a is a coaxial cable terminal for satellite broadcast input. However, the present invention is not limited to this, and a terminal capable of inputting a high-quality video / audio signal such as an S-video terminal or an HDMI terminal compliant with the HDMI (High-Definition Multimedia Interface) standard may be used.
The satellite broadcast input to the main input terminal 12a is a so-called high-definition broadcast (hereinafter referred to as “HD broadcast”) in which the resolution, image quality, definition, etc. are high and the image or video is clear. However, the present invention is not limited to this, and a program composed of high-quality video recorded on a Blu-ray disc (hereinafter referred to as “BD”) or a hard disk drive (hereinafter referred to as “HDD”) is input from a BD player or a personal computer. You may make it do.

At least one, preferably two or more, particularly preferably three sub-input terminals 12b are formed in the apparatus main body 11.
In this embodiment, the slave input terminal 12b receives broadcasts other than satellite broadcasts as will be described later. Therefore, the slave input terminal 12b is composed of a connector conforming to each communication standard so that a video / audio signal related to broadcasting other than satellite broadcasting can be input. In the present embodiment, it is composed of a LAN connector for a local communication network (hereinafter referred to as “LAN”), an RF terminal for television broadcasting, or a USB terminal.
Broadcasts other than satellite broadcasts input to the slave input terminal 12b are standard broadcasts with standard image quality and resolution (hereinafter referred to as “SD broadcast (standard definition broadcast)” for the HD broadcast). .

The main input terminal 12a is arranged at one end of the main circuit 14n, and the sub input terminal 12b is arranged at one end of the sub circuit 15.
As will be described later, the main circuit 14 forms a main broadcast in which a predetermined process is performed on a video / audio signal related to a satellite broadcast input from the main input terminal 12a. As will be described later, the slave circuit 15 forms a slave broadcast in which a predetermined process is performed on a video / audio signal related to a broadcast other than the satellite broadcast input from the slave input terminal 12b.

As shown in FIG. 1, the broadcast receiving apparatus 10 includes a receiving unit 16, an encoding unit 17, a detection unit 18, a recording unit 19, a prediction unit 20, a determination unit 21, a switching unit 22, and a modulation unit. 23 and an output unit 24.
Each of the above sections detects a video / audio signal system for processing a video / audio signal input to the main circuit 14 or the sub-circuit 15 and noise mixed in the main circuit 14 or the sub-circuit 15, and a reception failure occurs. And a noise detection system for determining whether or not the
The video / audio signal system includes a reception unit 16, an encoding unit 17, a switching unit 22, a modulation unit 23, and an output unit 24. The noise detection system includes a detection unit 18, a recording unit 19, and a prediction unit. The unit 20 and the determination unit 21 are included.
In the video / audio signal system, a main circuit 14 and a slave circuit 15 are arranged in parallel on the input side of the switching unit 22, and an output circuit 25 is formed on the output side of the switching unit 22. An output terminal 13 is disposed at the end of the output circuit 25.
The noise detection system is provided on each of the main circuit 14 side and the sub circuit 15 side. Hereinafter, the noise detection system on the main circuit 14 side is referred to as a first noise detection system, and the noise detection system on the slave circuit 15 side is referred to as a second noise detection system.

The receiving unit 16 has receiving means for receiving a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast, and dividing the received multi-channel broadcast for each channel. The receiving means is capable of receiving video / audio signals related to satellite broadcasts transmitted in different frequency bands, and also includes video / audio related to broadcasts other than satellite broadcasts transmitted in different frequency bands or different compression formats. The signal can be received.
The receiving unit 16 includes a first receiving unit 16a on the main circuit 14 side and a second receiving unit 16b on the slave circuit 15 side.

The first receiving unit 16a is provided with a main input terminal 12a on the input side. The HD broadcast by satellite broadcast input from the main input terminal 12 a to the main circuit 14 is divided for each channel, and the video / audio signals related to the HD broadcast are output to the encoding unit 17.
The second receiver 16b is provided with a secondary input terminal 12b on the input side. The SD broadcast by the broadcast other than the satellite broadcast input to the slave circuit 15 from the slave input terminal 12 b is divided for each channel, and the video / audio signal related to the SD broadcast is output to the encoding unit 17.
In addition, the second receiving unit 16 includes a selection unit that automatically selects an input destination of a video / audio signal related to broadcasting other than satellite broadcasting. The selection means selects the slave input terminal 12b having the smallest noise based on the amount of noise for each slave input terminal 12b fed back from the second detector 18b described later.
By providing the first receiver 16a and the second receiver 16b, HD broadcast and SD broadcast can be received simultaneously.

The encoding unit 17 includes a first encoding unit 17a on the main circuit 14 side and a second encoding unit 17b on the slave circuit 15 side.
The first encoding unit includes encoding means for encoding a video / audio signal related to HD broadcasting in a predetermined compression format. The HD broadcast in which the video / audio signal is encoded by the encoding means is hereinafter referred to as a main broadcast.
In this embodiment, H.264 is used. HD broadcasts input in a compression format that conforms to the H.264 standard or MPEG-4 AVC (Moving Picture Experts Group 4 Part10 Advanced Video Coding) standard are encoded into SD broadcasts in a compression format that conforms to the MPEG-2 standard .
The encoding is not limited to the above-described encoding, and any video / audio signal related to HD broadcast may be converted into a video / audio signal related to SD broadcast. Thereby, although the image quality is somewhat impaired, the transfer rate of the video / audio signal can be increased. Therefore, it can be smoothly delivered to the terminal 50 shown in FIG.
Video / audio signals related to broadcasting divided for each channel are encoded in a predetermined compression format, or video / audio signals compressed in a different compression format for each received broadcast are replaced with the predetermined compression format and input. Encoding means for encoding the video / audio signal related to the broadcast to be aligned with the video / audio signal conforming to the predetermined compression format;

The second encoding unit 17b encodes the video / audio signal related to the SD broadcast in a predetermined compression format, and when the input video / audio signal related to the SD broadcast is compressed in a different compression format, And an encoding means for replacing the compressed format. The SD broadcast in which the video / audio signal is encoded by the encoding means is hereinafter referred to as slave broadcast.
In this embodiment, a video / audio signal conforming to a compression format uniquely used in application software compatible with streaming distribution, etc. H.264 standard-compliant low-quality or standard-quality video / audio signals are uniformly encoded into SD / video-related video / audio signals using a compression format that conforms to the MPEG-2 standard used in terrestrial digital television broadcasting Has been.

On the input side of the encoding unit 17, the compression format of the video / audio signal is different between the first encoding unit 17a and the second encoding unit 17b. Such video / audio signals and sub-broadcast video / audio signals are arranged in a common compression format.
Thereby, the signal processing of the video / audio signal related to the main broadcast and the video / audio signal related to the sub broadcast can be facilitated, and can be easily distributed to the terminal 50.

The detection unit 18 includes a first detection unit 18a on the main circuit 14 side and a second detection unit 18b on the secondary circuit 15 side.
The first detection unit 18 a includes a first detection sensor 26 as detection means for detecting noise mixed in the main circuit 14.
The first detection sensor 26 is preferably a voltage sensor that measures a change in the voltage of the main circuit 14. The voltage sensor can detect a noise signal that is randomly superimposed on the video / audio signal related to the main broadcast.
The first detection sensor 26 is intended to detect noise and is not limited to a voltage sensor. For example, the main input terminal 12a or a weather sensor that measures weather changes over the receiving station 100 shown in FIG. In addition, among weather sensors, a rain sensor that detects the amount of rainfall, a cloud sensor that calculates the proportion of clouds in the cloud thickness and the predetermined area of the sky, and measures the voltage change in the air to detect the occurrence of lightning. It may be a sensor for observing bad weather, such as a lightning sensor that does not observe fine weather.

The second detection unit 18b includes a second detection sensor 27 as detection means for detecting noise mixed in the subcircuit 15. Since the second detection sensor 27 is the same as the first detection sensor 26, description thereof is omitted.
A plurality of second detection sensors 27 are arranged so as to correspond to the plurality of sub input terminals 12b arranged on the apparatus main body 11, respectively.
Thereby, the presence or absence of noise can be detected for each slave input terminal 12b, and the noise can be compared for each slave input terminal 12b.

The recording unit 19 includes a first recording unit 19a on the main circuit 14 side and a second recording unit 19b on the slave circuit 15 side.
The first recording unit 19a has recording means for recording noise detected by the first detection sensor 26 in time series. The recording means forms a first data log 30 as a recording result.
The 2nd recording part 19b has a recording means which records the noise detected by the 2nd detection sensor 27 along a time series. The recording means forms a second data log 31 as a recording result. The second data log is recorded for each slave input terminal 12b, and information is fed back to the selection means of the second receiver 16b.
Of the formed first data log 30 and second data log 31, the most recent recording is temporarily recorded in a memory or the like so that it can be easily referred to in the prediction unit 20 and the determination unit 21 shown below. Is done. The first data log 30 and the second data log 31 that have passed a predetermined time since they are formed are recorded in an external recording medium 40 such as an HDD or a flash memory card. Alternatively, the first data log 30 and the second data log 31 that have passed a predetermined time are deleted or overwritten with new data logs 30 and 31 in the order of generation in order to secure the storage area of the external recording medium 40.

The prediction unit 20 includes a first prediction unit 20a on the main circuit 14 side and a second prediction unit 20b on the slave circuit 15 side.
The first prediction unit 20a refers to the first data log 30 temporarily recorded in a memory or the like, and predicts whether the noise generated in the main circuit 14 will increase or decrease thereafter. have. The prediction means forms a first predicted time log 32. The first prediction time log 32 is a prediction of a time that would exceed a predetermined threshold when the measured noise value actually measured by the first detection sensor 26 is gradually increasing.
Similarly to the first prediction unit 20a, the second prediction unit 20b refers to the second data log 31 temporarily recorded in the memory or the like, and noise generated in the slave circuit 15 thereafter increases. Or predicting means for predicting whether or not to decrease. The prediction means forms a second predicted time log 33. Similar to the first predicted time log 32, the second predicted time log 33 is a time at which the measured value of noise actually measured by the second detection sensor 27 will exceed a predetermined threshold when the measured value gradually increases. Is predicted.
Similarly to the first data log 30 and the second data log, the first predicted time log 32 and the second predicted time log 33 are also temporarily recorded in a memory or the like. It is recorded on the medium 40 and is further overwritten with deletion or new predicted time logs 32 and 33.

The determination unit 21 includes a first determination unit 21a on the main circuit 14 side and a second determination unit 21a on the sub circuit 15 side.
The first determination unit 21a sequentially compares and determines the noise mixed in the main circuit 14 measured by the first detection sensor 26 and a predetermined threshold, and the magnitude of the noise exceeds the predetermined threshold. A determination means for outputting a switching signal 34 to the switching unit 22.
That is, when the magnitude of noise constantly mixed in the main circuit 14 becomes so large that it cannot be ignored, a reception failure occurs in the main broadcast composed of video / audio signals transmitted on the main circuit 14 due to the noise. This is because it can be considered that a broadcast program cannot be viewed.
Further, the determination means refers to the first predicted time log 32 even when the noise level of the main circuit 14 actually measured by the first detection sensor 26 does not exceed a predetermined threshold. The pre-switch signal 35 is transmitted to the switching unit 22 in preparation for the case where the magnitude of noise mixed in the main circuit 14 exceeds a predetermined threshold. Thus, when the predicted time recorded in the first predicted time log 32 is reached, the switching unit 22 can be controlled as quickly as possible to switch from the main circuit 14 to the sub circuit 15.
By the switching signal 34 and the pre-switching signal 35, the switching unit 22 can be quickly operated at the moment when the magnitude of noise mixed in the main circuit 14 exceeds the threshold value.

The second determination unit 21b uses the magnitude of noise recorded in the first data log 30 as a threshold value, and sequentially compares and determines the threshold value and the noise level of the slave circuit 15 described in the second data log 31. Determination means.
Here, the magnitude of the noise of the slave circuit 15 recorded in the second data log 31 to be determined is the video related to the SD broadcast with the minimum noise selected by the selection means provided in the second reception means 16b. The second data log 31 of the audio signal.
If the magnitude of the noise recorded in the second data log 31 is smaller than the magnitude of the noise recorded in the first data log 30, when the main circuit 14 is switched to the slave circuit 15, it is transmitted on the slave circuit 15. It is possible to prevent the secondary broadcast program from being already viewed due to noise mixed in the video / audio signal.

Further, the second determination unit 21b may compare and determine the second predicted time log 33 and the first predicted time log 32.
Here, when the predicted time recorded in the second predicted time log 33 is earlier than the predicted time recorded in the first predicted time log 32, when the main broadcast receives a reception failure, the program input destination is switched. Even so, there is a possibility that the slave broadcast has already suffered a reception failure.
Therefore, preferably, as an emergency evacuation option, a stored alternative video may be output from the external recording medium 40 provided in the apparatus main body 11. As a result, the magnitude of noise mixed in the main circuit 14 and the sub-circuit 15 exceeds a predetermined threshold value, and both the main broadcast and the sub-broadcast receive reception obstacles. When neither of them can be viewed, the substitute video can be output to each terminal 50 as quickly as possible.
In addition, when the magnitude of noise recorded in the second data log 31 exceeds the magnitude of noise recorded in the first data log 30 as a threshold value, the second determination unit 21b has already received the main broadcast. It is determined that there is a high probability that both the program and the sub broadcast program are not viewable due to reception failure.
At this time, the substitute video saved from the external recording medium 40 provided in the apparatus main body 11 is immediately output to the terminal 50. Thereby, it is possible to prevent the noise screen from being displayed on each terminal 50.

The switching unit 22 includes a switching unit that automatically switches the main broadcast and the sub broadcast as quickly as possible based on the determination result. The switching means includes a switch 36 and switch control means for controlling the operation of the switch.
Terminals of the main circuit 14 and the subcircuit 15 are arranged on the input side of the switching unit 22. On the output side of the switching unit 22, the starting end of the output circuit 25 is arranged. The switch control means receives the switching signal 34 or the pre-switching signal 35 from the determination unit 21 and performs switching control for switching the switch 36. By the switching control, the main circuit 14 and the sub circuit 15 are automatically switched instantaneously.
Preferably, the terminal 41 a of the emergency evacuation circuit 41 is arranged on the input side of the switching unit 22. The starting end of the emergency evacuation circuit 41 is connected to the external recording medium 40.

The connection state of the switch 36 is normally held on the main circuit 14 side. Then, the switch control means automatically switches the connection state of the switch 36 from the main circuit 14 to the sub-circuit 15 based on the switching signal 34 or the pre-switching signal 35 received from the determination unit 21, and the switching signal 34 or When the pre-switch signal 35 is interrupted, the connection state of the switch 36 is automatically switched from the slave circuit 15 to the main circuit 14.
As a result, when the noise mixed in the main circuit 14 exceeds a predetermined threshold value, the main broadcast suffers a reception failure, and the program by the main broadcast becomes unviewable, the program is automatically converted to the sub broadcast program as much as possible. Can be switched with. On the other hand, when the reception failure of the main broadcast ends, it is possible to automatically switch to the main broadcast program as much as possible.
When the determination unit 21 receives a determination result that the noise mixed in the main circuit 14 and the sub circuit 15 exceeds both of the predetermined threshold values, both the main broadcast and the sub broadcast receive a reception failure, and the main broadcast Since both the program of the program and the program of the sub broadcast cannot be viewed, the substitute video can be urgently input from the external recording medium 40 by connecting the switch 36 to the terminal 41a of the emergency evacuation circuit 41. it can.

The modulation unit 23 includes modulation means for modulating the video / audio signal related to the main broadcast or the sub broadcast transmitted on the output circuit 25 of the switching unit 22 in accordance with a predetermined modulation format.
In the present embodiment, digital modulation is performed in the OFDM modulation format, and modulation is performed to a transmission system for terrestrial digital television broadcasting.
OFDM (Orthogonal Frequency Division Multiplexing) is orthogonal wave frequency division multiplexing, and is used to convert high-speed and wide-band data signals into low-speed and narrow-band data signals and transmit them in parallel on a predetermined frequency axis. In addition, it is one of digital modulation formats in which modulation on the same frequency axis is allowed by using orthogonality of carrier waves. According to this modulation format, even if some of the plurality of carriers overlap, they can be arranged closely without interfering with each other. Therefore, the utilization efficiency of the wideband frequency can be increased when transmitting a data signal in a predetermined wideband.
Here, by modulating with the transmission method of the terrestrial digital TV broadcast according to the conventional analog TV broadcast, it is possible to divert the equipment related to the conventional TV line, so it is possible to reduce the cost of capital investment and the like. .
In addition, if the modulation is not based on the transmission format of terrestrial digital television by OFDM modulation, for example, to the transmission method of IEEE802.11 wireless LAN, wiring work etc. are omitted using a wireless router and an indoor repeater. be able to. Therefore, costs such as capital investment can be suppressed.
Further, by modulating to the transmission method of the power line modem by OFDM modulation, it is possible to use the electrical equipment stretched around the building as it is, and thus it is possible to suppress the cost of capital investment and the like.

The output unit 24 includes an output unit that outputs the video / audio signal related to the main broadcast or the sub broadcast modulated by the modulation unit 23 from the output terminal 13 to the terminal 50 in accordance with a predetermined output format, and the modulation unit 23 performs digital modulation. Output means for outputting the main broadcast or sub broadcast program for recording and saving in the external recording medium 40.
The external recording medium 40 includes a hard disk drive (HDD), a card type flash memory, or a USB memory. The apparatus main body 11 has a dedicated card slot into which the card type flash memory can be inserted and removed, and a USB connector into which the USB memory can be inserted and removed. Have.
Preferably, the HDD used as the external recording medium 40 may temporarily record a modulated main broadcast or sub broadcast program. The temporarily recorded program by the main broadcast or subbroadcast is output to the respective terminals 50 shown in FIG. 3 while the video / audio signal related to the main broadcast or subbroadcast is output to reproduce the program composed of the video / audio signal. Is done. Thereby, in the receiving station 100, the terminal 50 can reproduce the program in real time by a so-called streaming method, and the line use efficiency between the receiving station 100 and the transmitting station 110 described later can be improved.

The broadcast receiving apparatus 10 having the above configuration is installed in the receiving station 100. This will be described with reference to FIG.
The receiving station 100 includes a broadcast receiving device 10, a plurality of terminals 50, a television line 51 connecting the broadcast receiving device 10 and the terminal 50, a local communication network 52 (hereinafter referred to as “LAN”), and a distributor 53. .
In FIG. 2, the TV line 51 and the LAN 52 are simplified by being shown by a single solid line.
In the present embodiment, the receiving station 100 is preferably an accommodation facility such as a hotel or an inn or a stay-type facility such as a hospital equipped with hospitalization facilities. Furthermore, the receiving station 100 can also be installed in places such as islands and mountainous narrow areas where normal TV broadcast waves are difficult to reach.

The description of the broadcast receiving apparatus 10 is omitted.
The terminal 50 includes a television 50a having a monitor and a speaker, and preferably a charging device 50b.
In the present embodiment, the television 50a is preferably a digital television capable of receiving a terrestrial digital television broadcast, but is not limited to this, for example, an analog television and a set top box (STB) provided with a digital modulation circuit. As long as it is configured to be able to view a program by terrestrial digital television broadcasting, such as a combination of the above and the like.
The billing device 50b has a function of canceling the viewing restriction of the pay broadcast for which viewing is restricted. For example, the billing device 50b can be authenticated and inserted by inserting a prepaid card into the billing device 50b. There are those that insert coins or coins into the billing device 50b so that they can be watched for a predetermined time, and those that pay a fee corresponding to the viewing time after inserting a post-pay card into the device 50b.

The TV line 51 preferably transmits video / audio signals related to terrestrial digital TV broadcasting, in addition to transmitting video / audio signals related to the main broadcast or subordinate broadcast output from the broadcast receiver 10 on the line. .
The TV line 51 carries high frequencies in a predetermined frequency band for carrying video / audio signals related to the main broadcast, the sub broadcast, and the terrestrial digital TV broadcast. The frequency band is approximately 300 Hz to 3 THz.
The start of the TV line 51 is connected to the broadcast receiver 10 or an antenna for receiving terrestrial digital TV broadcasts, and the end is connected to an RF terminal (not shown) of the TV 50a. Thus, the terrestrial digital television broadcast can be received by the television 50a, and the program by the main broadcast or the sub broadcast is interrupted from the broadcast receiver 10 to a so-called vacant channel where the program by the terrestrial digital television broadcast is not input. be able to.

The broadcast receiving apparatus 10 and each terminal 50 are connected to each other via a LAN 52 to form a local area network (LAN).
Thus, even when the TV line 51 is disconnected, a program based on the main broadcast or the sub broadcast can be output from the broadcast receiving apparatus 10 to each terminal 50 using the LAN 52.

The distributor 53 includes a demultiplexing unit that equally distributes a carrier wave carrying a video / audio signal related to a main broadcast or a sub broadcast transmitted on the TV line 51 to each terminal 50, a broadcast receiving apparatus 10, and a predetermined terminal. And hub means for relaying communication signals transmitted on the LAN 52 in order to realize bidirectional communication with the network 50.
As a result, a program related to the main broadcast or the sub broadcast can be output from the broadcast receiving apparatus 10 to the terminal 50, and for example, information on a program being viewed can be communicated between the terminal 50 and the broadcast receiving apparatus 10. it can.

The receiving station 100 having the above configuration is incorporated in the broadcasting system 1000. This will be described with reference to FIG.
The broadcasting system 1000 includes a receiving station 100, a transmitting station 110, a communication satellite 120, a wide area communication network 130, and a relay station 140.
At least one, preferably two or more receiving stations 100 are provided in the broadcasting system 1000. Detailed description of the receiving station 100 is omitted. At least one transmitting station 110 for transmitting broadcasts, a communication satellite 120 for relaying broadcasts using satellite telecommunication lines, and a wide area communication network 130 for connecting at least one transmitting station 110 and a plurality of receiving stations 100 to each other. And preferably a relay station 140 for realizing terrestrial digital broadcasting.

At least one transmission station 110 is provided in the broadcasting system 1000. The transmission station 110 includes a center server 111 and a broadcast transmission device 112.
The center server 111 is configured to be able to read a program based on a master record recorded and stored in an external recording medium such as an HDD, a flash memory, or a USB memory. In addition, it has streaming output means for outputting the photographed program to the broadcast transmitting apparatus 112 in real time while temporarily storing it as a master record.
The broadcast transmission device 112 includes an input unit 113, an encoding unit 114, and an output unit 115.

The input unit 113 outputs a program based on the master record input from the center server 111 to the encoding unit 114.
The encoding unit 114 encodes the video / audio signal related to the program based on the master record into at least one video / audio signal related to the HD broadcast, and at least one video / audio signal related to the program based on the master record, preferably 2 One or more, and more preferably, encoding into video / audio signals related to three SD broadcasts.
Furthermore, the video / audio signal related to HD broadcasting is H.264. The data is compressed in a compression format compliant with the H.264 / MPEG-4 AVC standard and output to the output unit 115.
Further, the video / audio signal related to the SD broadcast is compressed in a compression format compliant with the MPAG-2 standard, and is output to the output unit 115.

The output unit 115 includes at least one main output terminal 116 and at least one, preferably two or more, more preferably three sub output terminals 117.
The main output terminal 116 is composed of a satellite dish for satellite broadcasting, and a program in which video / audio signals are encoded according to HD broadcasting is output.
The slave output terminal 117 is composed of an antenna for terrestrial digital television broadcasting or a connector for the wide area communication network 130, and outputs a program in which video / audio signals are encoded according to SD broadcasting.
The video / audio signal related to HD broadcast output from the main output terminal 116 and the video / audio signal related to SD broadcast output from the sub-output terminal 117 are synchronized.
Thereby, an SD broadcast program having the same content as an HD broadcast program can be simultaneously transmitted to the receiving station 100.
In this embodiment, the sub-output terminal 117 is configured to output a video / audio signal related to SD broadcasting with standard resolution and image quality. However, the present invention is not limited to this. If the capacity of the TV broadcast line or the wide area communication network 130 is sufficient, a large-capacity HD broadcast may be transmitted.

  The communication satellite 120 is arranged between the transmitting station 110 and the receiving station 100, and is installed on a geostationary satellite orbit for relaying the satellite telecommunication line. The satellite telecommunications line connects the transmitting station 110 and the plurality of receiving stations 100, and is configured so that the receiving station 100 can simultaneously receive the HD broadcast program transmitted from the transmitting station 110.

The wide area communication network 130 (hereinafter referred to as “WAN”) includes a telecommunication line that connects the receiving station 100 and the transmitting station 110, a so-called Internet line. Each of the receiving station 100 and the transmitting station 110 has a unique identification code.
The terrestrial digital television broadcast relay station 140 relays the terrestrial digital television broadcast transmitted from the transmission station 110 and transmits it to the reception station 100.

A method of using the broadcasting system 1000 having the above configuration will be described with reference to FIG.
The transmission station 110 encodes the program by the encoding unit 114 of the broadcast transmission device 112 from the program by the master record recorded and stored in the external recording medium of the center server 111 to form the program by HD broadcast and the program by SD broadcast.
Here, one channel of HD broadcasting corresponds to three channels of SD broadcasting. Therefore, it is possible to secure a band for three SD broadcast channels in a band for one HD broadcast channel. As a result, a program based on one HD broadcast and a program based on three SD broadcasts can be transmitted using a frequency band for transmitting two channels of HD broadcast.

A program by HD broadcast is transmitted from the main output terminal 116 of the broadcast transmission device 112 to the receiving station 100 by satellite broadcast.
On the other hand, a program by SD broadcast is transmitted from the slave output terminal 117 of the broadcast transmission device 112 to the receiving station 100 by broadcast other than satellite broadcast. In the present embodiment, the broadcast other than the satellite broadcast is a stream distribution via the wide area communication network 130 and preferably a terrestrial digital television broadcast via the relay station 140.

Video / audio signals related to HD broadcasting are input to the main input terminal 12 a of the broadcast receiving device 10 of each receiving station 100.
The video / audio signal related to the SD broadcast is input to the slave input terminal 12b of the broadcast receiving device 10 of each receiving station 100. Here, the video / audio signals related to the SD broadcast have different compression formats and modulation methods in the wide area communication network 130 and the terrestrial digital television broadcast. Therefore, the signals are input to the slave input terminals 12b formed to correspond to the slave output terminals 117, respectively.

Among broadcasts other than satellite broadcasts, SD broadcast using the wide area communication network 130 is distributed by bidirectional communication because the transmitting station 110 and the receiving station 100 have unique identification codes.
The bidirectional communication is performed as follows. First, the transmitting station 110 transmits distribution information indicating that distribution of a program by SD broadcasting is started to each receiving station 100. In response to the distribution information, each receiving station 100 responds to the transmitting station 110 with a program distribution request by the SD broadcast. Then, the transmitting station 110 transmits a program by SD broadcasting to each receiving station 100 in response to the distribution request.

Here, when the receiving station 100 responds to the transmission station 110 with information related to the distribution request, if the receiving station 100 has already received a reception failure, the information related to the reception failure is changed to the information related to the distribution request. Respond to the transmitting station 110 by superimposing. Thereby, since each receiving station 100 has a unique identification code, the transmitting station 110 easily identifies the receiving station 100 that is currently receiving the receiving failure by a distribution request including information related to the receiving failure. In addition, the transmitting station 110 can identify a wide area where the receiving station 100 that has received a reception failure is installed.
Therefore, for example, a program related to SD broadcasting using the wide area communication network 130 in anticipation that a distribution request including information related to reception failure is returned from another receiving station 100 installed in the area. Is installed in the vicinity of the area where the reception failure has occurred when it is not possible to directly distribute to the receiving station 100 in the area where the reception failure has occurred. The transmitting station 110 can issue a command to the other receiving station 100 to transfer the program related to the SD broadcast from the other receiving station 100.

Further, when the area where the reception failure occurs is wide, a program related to the SD broadcast distributed to one receiving station 100 among the plurality of receiving stations 100 arranged in the reception failure area is displayed. A command to be shared with other receiving stations 100 can be issued from the transmitting station 110.
As a result, it is possible to increase the utilization efficiency of the lines constituting the wide area communication network 130, compared to the case where the transmission station 110 and the reception station 100 perform one-to-one broadcast distribution.

Preferably, the identification code of the receiving station 100 is encrypted as an undisclosed identification code, and the SD broadcast transmitted from the transmitting station 110 to the receiving station 100 is encrypted into a scrambled broadcast. Can be restricted to view.
In this case, a decoding unit is provided in the encoding unit 17 of the broadcast receiving apparatus 10 so that the encoded video / audio signal is decoded when the video / audio signal related to the SD broadcast is encoded.
As a result, since a program based on SD broadcasting that is subject to viewing restrictions can be viewed only by the receiving station 100 having a specific private identification code, other receiving stations 100, other personal computers sharing the Internet line, etc. Can be prevented from being hacked by an SD broadcast directed to the specific receiving station 100.

  On the other hand, among broadcasts other than satellite broadcasts, video / audio signals related to SD broadcasts using terrestrial digital television broadcasts are relayed from the transmission station 110 to a plurality of reception stations 100 by the relay station 140 if necessary. Transmits over a wireless telecommunication line related to terrestrial digital television broadcasting. Most of the radio waves used for the wireless telecommunication lines are transmitted under the clouds even if they are somewhat irregularly reflected on the building or mountain surface. Therefore, it is possible to minimize the influence of reception interference compared to satellite broadcasting in which a signal transmitted on a wireless communication line may be hindered by rain, snow, or bad weather such as clouds and lightning.

  In addition, an SD broadcast program using terrestrial digital television broadcast can send up to three channels of SD broadcast for one channel of HD broadcast, although the image quality is inferior to that of an HD broadcast program. Therefore, among the three-channel SD broadcasts transmitted from the broadcast transmission device 112, channels 1 to 2 can be allocated to the wide area communication network 130, and programs based on the SD broadcasts of the remaining channels can be allocated to the terrestrial digital TV line. . By transmitting a program having the same content by the SD broadcast to the receiving station 100 using a plurality of transmission paths, it can be used as a backup for compensating for a missing portion of the program by the HD broadcast.

The HD broadcast and SD broadcast input to the receiving station 100 are distributed to each terminal 50 or recorded on the external recording medium 40 as described below.
Video / audio signals related to HD broadcasting using satellite broadcasting are input to the main input terminal 12 a of the broadcast receiving device 10. A program by HD broadcasting is divided for each channel by the first receiving unit 16a, and a video / audio signal related to HD broadcasting is output to the first encoding unit 17a.
The first encoding unit 17a converts a video / audio signal related to the HD broadcast into a video / audio signal constituting a standard-definition SD broadcast, and compresses the video / audio signal related to the SD broadcast into the main broadcast. Encode to the video / audio signal.
The video / audio signal related to the main broadcast is modulated into a predetermined output format by the modulation unit 23 via the switching unit 22 that is normally connected to the main circuit 14 side, and then output from the output unit 24. It is output to each terminal 50.
When there is no reception failure on the main circuit 14 that transmits the video / audio signal related to the main broadcast, the program related to the main broadcast is distributed to each terminal 50 preferentially.
Moreover, when delivering from the output part 24 to each terminal 50, the empty channel of the television 50a of each terminal 50 can be utilized by outputting via an RF terminal. Thereby, since the conventional line can be diverted, capital investment can be suppressed.

On the other hand, video / audio signals related to SD broadcasting using broadcasting other than satellite broadcasting are input to the slave input terminal 12 b of the broadcast receiving device 10. Then, the program by the SD broadcast is sent to the second receiver 16b and divided for each channel, and the video / audio signal related to the SD broadcast is output to the second encoder 17b.
The second encoding unit 17b replaces the video / audio signals related to the SD broadcast received in different compression formats according to a predetermined compression format, and encodes the video / audio signals related to the secondary broadcast.
As for the video / audio signal related to the slave broadcast, when the switching unit 22 operates to automatically switch from the main circuit 14 to the slave circuit 15, the program by the slave broadcast can be transmitted to the modulation unit 23 as much as possible. So that it is in standby.

Also preferably, since the video / audio signals related to the slave broadcast are input by being transmitted over a plurality of telecommunication lines, one channel is sequentially recorded on the external recording medium 40 in preparation for reception failure. May be assigned to. In this case, when a reception failure occurs, a program related to the slave broadcast recorded and stored in the external recording medium 40 is used as a backup, and as an alternative broadcast that complements the missing part of the program by the main broadcast in the receiving station 100. Can only be used.
Further, the slave broadcast program using the wide-area communication network 130 may be streamed to be played on the terminal 50 while receiving the video / audio signal related to the SD broadcast from the transmission station 110.
Furthermore, slave broadcasting for two channels may be formed from the wide area communication network 130, and streaming distribution may be performed on one channel while downloading to the external recording medium 40 on another channel for backup.

  Here, the electrical component always generates minute noise. An antenna in a communication system detects noise such as space noise due to electromagnetic fields coming from a radiation source that can be regarded as infinity from the sun or a star, friction due to clouds in the air, or aerial noise due to lightning. For example, noise such as snow noise, ghost, and noise is detected in analog broadcasting, and noise such as black noise, mosquito noise, and white point is detected in digital broadcasting. The noise signal constituting the noise is detected as a random voltage change.

  In the present embodiment, the detection unit 18 provided in the broadcast receiving apparatus 10 includes a first detection unit 18 a that detects noise on the main circuit 14 and a second detection unit 18 b that detects noise on the sub-circuit 15. . The detector 18 detects a noise signal superimposed on the video / audio signal related to the input broadcast.

The noise signal transmitted on the main circuit 14 is recorded as the first data log 30 in time series in the first recording unit 19a. Preferably, all noise signals are recorded in the first data log 30 regardless of the size of the noise signal.
When the first data log 30 is gradually increasing, the first prediction unit 20a predicts that there is a possibility that a reception failure may occur due to an increase in noise signals transmitted on the main circuit 14. The time when the magnitude of the voltage indicating the noise signal will exceed a predetermined threshold is recorded as the first predicted time log 32.

The first determination unit 21a compares and determines the first data log 30 that is an actual measurement value of the noise signal transmitted on the main circuit 14 with a predetermined threshold, and when the magnitude of the noise signal exceeds the predetermined threshold, The switching signal 34 is transmitted to the switching unit 22. When the switching signal 34 is transmitted to the switching unit 22, the switching unit 22 automatically switches the switch 36 from the main circuit 14 to the slave circuit 15 as soon as possible.
Further, preferably, the first determination unit 21a switches the switching unit when the time recorded in the first predicted time log 32 is assumed that a reception failure that disturbs the video / audio signal transmitted on the main circuit 14 occurs. 22 preliminarily transmits a pre-switching signal 35 so that automatic switching from the main circuit 14 to the sub-circuit 15 can be instantaneously performed.

Similarly to the noise signal transmitted on the main circuit 14, the noise signal transmitted on the subcircuit 15 is recorded as the second data log 30 in time series in the second recording unit 19b. Preferably, all the noise signals are recorded in the second data log 31 regardless of the magnitude of the noise signal for each secondary input terminal 12b.
By comparing the magnitude of the noise signal for each sub input terminal 12b, it is possible to easily select the transmission source of the video / audio signal related to the SD broadcast with the least noise by the selection means provided in the second receiving unit 16b. it can.
When the second data log 31 is gradually increasing, the second prediction unit 20b predicts that there is a possibility that a reception failure may occur due to an increase in the noise signal transmitted on the slave circuit 15. The time when the magnitude of the voltage indicating the noise signal will exceed a predetermined threshold is recorded as the second predicted time log 33.

The second determination unit 21b uses the actually measured value of the noise signal on the main circuit 14 recorded in the first data log as a threshold value, and compares and determines with the second data log 31 that is the actually measured value of the noise signal on the slave circuit 15. . When the noise signal transmitted on the secondary circuit 15 recorded in the second data log 31 is larger than the noise signal transmitted on the main circuit 14, the switching signal 34 is transmitted to the switching unit 22. A signal to request to the first determination unit 21a is output so as not to.
As a result, when the main circuit 14 is switched to the sub-circuit 15, it is possible to prevent the sub-broadcast program from being viewed.
Further, it is determined that the noise signal recorded in the first data log 30 by the first determination unit 21a exceeds a predetermined threshold, and the magnitude of the noise signal recorded in the second data log 31 by the second determination unit 21b. Is larger than the noise signal recorded in the first data log 30, the noise mixed into the main circuit 14 and the sub circuit 15 is large, and both the circuits 14 and 15 are both affected by reception failure. It is judged that
In this case, the emergency evacuation signal 36 is transmitted to the switching unit 22 so that the substitute video recorded in the external recording medium 40 is distributed to each terminal 50. As a result, it is possible to prevent a program viewed on each terminal 50 from becoming unviewable.

According to the broadcast receiving apparatus 10 described in the present embodiment, a main circuit 14 in which a program having the same content as a main broadcast program is simultaneously played in the sub broadcast and the connection state by the switch 36 of the switching unit 22 is preferentially held. And the sub-circuit 15 used when a reception failure that cannot be overlooked in the program by the main broadcast is generated by superimposing a large noise signal on the video / audio signal transmitted on the main circuit 14, the switching signal 34 or The switch 36 that is instantly activated by the pre-switching signal 35 is switched as quickly as possible.
As a result, the terminal 50 interrupts broadcasting even when it is cloudy, when it is raining / snowing, under bad weather such as typhoon, or when receiving a radio reception due to illegal radio waves etc. Can be viewed continuously.

Also, according to the broadcast system 1000 having the broadcast receiving apparatus 10 described in the present embodiment, between the transmitting station 110 and the receiving station 100, a satellite telecommunications line for transmitting video / audio signals related to satellite broadcasting, A plurality of telecommunication lines for transmitting video / audio signals related to broadcasting other than satellite broadcasting were provided. A high quality HD broadcast program is broadcast by satellite broadcast, and a standard quality SD broadcast program is broadcast by a broadcast other than satellite broadcast. In addition, video / audio signals related to SD broadcasting are transmitted over telecommunication lines that carry broadcasts other than multiple satellite broadcasts.
Thus, even when reception failures occur at a plurality of locations, the terminal 50 provided in the receiving station 100 complementing each other can continuously watch the broadcast without interruption.
Further, in the receiving station 100, by using an antenna line connected to the RF terminal of the terminal 50, it is possible to play the main broadcast and the sub broadcast using an empty channel of the conventional television broadcast.
Thereby, the introduction cost at the time of installing and wiring the broadcast receiving apparatus 10 described in the present embodiment can be suppressed.

DESCRIPTION OF SYMBOLS 10 ... Broadcast receiving apparatus, 11 ... Apparatus main body, 12 ... Input terminal, 12a ... Main input terminal, 12b ... Sub input terminal, 13 ... Output terminal, 14 ... Main circuit, 15 ... Sub circuit,
16 ... receiving unit, 16a ... first receiving unit, 16b ... second receiving unit,
17 ... Encoding unit, 17a ... First encoding unit, 17b ... Second encoding unit,
18 ... detector, 18a ... first detector, 18b ... second detector,
DESCRIPTION OF SYMBOLS 19 ... Recording part, 19a ... 1st recording part, 19b ... 2nd recording part 20 ... Prediction part, 20a ... 1st prediction part, 20b ... 2nd prediction part,
21 ... determination unit, 21a ... first determination unit, 21b ... second determination unit 22 ... switching unit,
23 ... Modulation unit, 24 ... Distribution unit,
25 ... Output circuit,
26 ... 1st detection sensor, 27 ... 2nd detection sensor,
30 ... 1st data log, 31 ... 2nd data log,
32 ... 1st prediction time log, 33 ... 2nd prediction time log,
34 ... switching signal, 35 ... pre-switching signal,
36 ... switch,
40 ... External recording medium,
50 ... Terminal, 50a ... Television, 50b ... Billing device,
51 ... TV line, 52 ... LAN line, 53 ... distributor,
100: receiving station,
110: Transmitting station,
111 ... Center server, 112 ... Broadcast transmission device,
113: Input unit, 114: Transmitter encoding unit, 115: Output unit,
116 ... main output terminal, 117 ... slave output terminal,
120 ... communication satellite, 130 ... wide area network, 140 ... relay station,
1000: Broadcast system.

Claims (10)

A broadcast receiving apparatus capable of receiving a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast,
Receiving means for dividing the received multi-channel broadcast for each channel;
Video / audio signals related to broadcasting divided for each channel are encoded in a predetermined compression format, or video / audio signals compressed in a different compression format for each received broadcast are replaced with the predetermined compression format and input. Encoding means for encoding the video / audio signal related to the broadcast to be aligned with the video / audio signal conforming to the predetermined compression format;
Modulation means for modulating each channel according to a predetermined modulation format so as not to cause interference when the broadcast composed of the video / audio signal encoded by the encoding means is output;
In a broadcast receiving apparatus comprising: output means for outputting a broadcast modulated by the modulation means and modulated so as to be output for each channel to a terminal according to a predetermined output format, or for recording and saving to an external recording medium ,
The receiving means simultaneously receives a program having the same content as the program by the satellite broadcast by a broadcast other than the satellite broadcast,
A switching means is provided between the output side of the encoding means and the input side of the modulation means,
The switching means is
A main circuit in which a video / audio signal related to the satellite broadcast is transmitted and a main broadcast is formed by processing the video / audio signal in a predetermined compression format;
A slave circuit that transmits a video / audio signal related to a broadcast other than the satellite broadcast and forms a slave broadcast in which the video / audio signal is processed in a predetermined compression format,
Switch as quickly as possible according to the prescribed conditions,
In the main circuit and the sub circuit,
Detecting means for detecting noise mixed in the main circuit or the sub circuit;
Recording means for sequentially recording the noise and forming a recording result;
Prediction means for predicting the time when the noise exceeds a predetermined threshold based on the increase or decrease of the noise recorded in the recording result, and forming a prediction result;
While determining whether or not the noise of the main circuit measured by the detection means exceeds a predetermined threshold, and outputs a switching signal to the switching means,
When reaching the time predicted by said prediction result, said in case the noise of the main circuit actually measured by the detecting means exceeds a predetermined threshold value, the pre-switching signal to said switching means for actuating rapidly said switching means And determining means for outputting
When a reception failure occurs in a program composed of video / audio signals transmitted through the main circuit due to noise mixed in the main circuit ,
Based on the switching signal or the pre-switching signal output by the determination means,
The switching means, when the noise of the main circuit measured by the detection means exceeds a predetermined threshold, or when the predicted time is reached,
A broadcast receiving apparatus characterized by switching to a program composed of video / audio signals transmitted through the slave circuit as quickly as possible. Providing at least one main input terminal on the input end side of the main circuit;
At least one, preferably two or more slave input terminals are provided on the input end side of the slave circuit,
When the noise mixed in the main circuit does not exceed the threshold, the switching means is connected to the main circuit,
The video / audio signal related to the satellite broadcast input to the main input terminal is preferentially output as compared with the video / audio signal related to a broadcast other than the satellite broadcast input to the slave input terminal. The broadcast receiving apparatus according to claim 1, wherein An emergency evacuation circuit is provided between the switching means and the external recording medium,
In the determination means, it is determined that any noise mixed in the main circuit and the sub circuit exceeds a predetermined threshold,
When a program consisting of video / audio signals transmitted through the main circuit and the sub circuit becomes unviewable due to reception failure,
In the switching means, switching from the main circuit or the slave circuit to the emergency evacuation circuit as quickly as possible,
The broadcast receiving apparatus according to claim 1 or 2, wherein the program recorded and stored in the external recording medium is output from the output means. At least one transmitting station having a facility for transmitting a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast;
At least one, preferably two or more receiving stations, having facilities for receiving the multi-channel broadcast;
It consists of a communication satellite that relays the satellite broadcast,
A broadcasting system in which the satellite broadcast transmitted from the transmitting station is relayed by the communication satellite, and the receiving station simultaneously receives the same content,
The receiving station includes a broadcast receiving device that receives the broadcast, and a plurality of terminals that have a monitor that can view a program output from the broadcast receiving device.
The broadcast receiving device is:
A broadcast receiving apparatus capable of receiving a multi-channel broadcast including a satellite broadcast and a broadcast other than the satellite broadcast,
Receiving means for dividing the received multi-channel broadcast for each channel;
Video / audio signals related to broadcasting divided for each channel are encoded in a predetermined compression format, or video / audio signals compressed in a different compression format for each received broadcast are replaced with the predetermined compression format and input. Encoding means for encoding the video / audio signal related to the broadcast to be aligned with the video / audio signal conforming to the predetermined compression format;
Modulation means for modulating each channel according to a predetermined modulation format so as not to cause interference when the broadcast composed of the video / audio signal encoded by the encoding means is output;
In a broadcast receiving apparatus comprising: output means for outputting a broadcast modulated by the modulation means and modulated so as to be output for each channel to a terminal according to a predetermined output format, or for recording and saving to an external recording medium ,
The receiving means simultaneously receives a program having the same content as the program by the satellite broadcast by a broadcast other than the satellite broadcast,
A switching means is provided between the output side of the encoding means and the input side of the modulation means,
The switching means is
A main circuit in which a video / audio signal related to the satellite broadcast is transmitted and a main broadcast is formed by processing the video / audio signal in a predetermined compression format;
A slave circuit that transmits a video / audio signal related to a broadcast other than the satellite broadcast and forms a slave broadcast in which the video / audio signal is processed in a predetermined compression format,
Switch as quickly as possible according to the prescribed conditions,
In the main circuit and the sub circuit,
Detecting means for detecting noise mixed in the main circuit or the sub circuit;
Recording means for sequentially recording the noise and forming a recording result;
Prediction means for predicting the time when the noise exceeds a predetermined threshold based on the increase or decrease of the noise recorded in the recording result, and forming a prediction result;
While determining whether or not the noise of the main circuit measured by the detection means exceeds a predetermined threshold, and outputs a switching signal to the switching means,
When reaching the time predicted by said prediction result, said in case the noise of the main circuit actually measured by the detecting means exceeds a predetermined threshold value, the pre-switching signal to said switching means for actuating rapidly said switching means And determining means for outputting
When a reception failure occurs in a program composed of video / audio signals transmitted through the main circuit due to noise mixed in the main circuit ,
Based on the switching signal or the pre-switching signal output by the determination means,
The switching means, when the noise of the main circuit measured by the detection means exceeds a predetermined threshold, or when the predicted time is reached,
Configured to switch as quickly as possible to the program consisting of video and audio signals to transmit the sub circuit,
Even when the satellite broadcast the program received by could not viewed on the monitor by the reception failure, and outputs the program received by the broadcasting other than the satellite to the terminal,
A broadcasting system characterized in that the program without noise can be continuously viewed on the monitor . Provide at least one main input terminal on the input end side of the main circuit of the broadcast receiver,
At least one, preferably two or more slave input terminals are provided on the input end side of the slave circuit,
When the noise mixed in the main circuit does not exceed the threshold, the switching means is connected to the main circuit,
The video / audio signal related to the satellite broadcast input to the main input terminal is preferentially output as compared with the video / audio signal related to a broadcast other than the satellite broadcast input to the slave input terminal. The broadcast system according to claim 4, wherein An emergency evacuation circuit is provided between the switching means of the broadcast receiving device and the external recording medium,
In the determination means, it is determined that any noise mixed in the main circuit and the sub circuit exceeds a predetermined threshold,
When a program consisting of video / audio signals transmitted through the main circuit and the sub circuit becomes unviewable due to reception failure,
In the switching means, switching from the main circuit or the slave circuit to the emergency evacuation circuit as quickly as possible,
6. The broadcasting system according to claim 4, wherein the program recorded and stored in the external recording medium is output from the output unit. Provide a wide area communication network consisting of the transmitting station and each receiving station,
On the wide-area communication network, video / audio signals related to broadcasting other than the satellite broadcasting are transmitted from the transmitting station to the receiving station,
The broadcast receiving device that has received the video / audio signal related to the broadcast other than the satellite broadcast outputs the video / audio signal related to the broadcast other than the satellite broadcast substantially simultaneously,
7. The broadcasting system according to claim 4, wherein a program composed of video / audio signals related to broadcasting other than the satellite broadcasting is reproduced as much as possible on the terminal. . The transmitting station and each receiving station have a unique identification code;
Among the receiving stations, one receiving station arranged in the area where the reception failure has occurred sends a distribution request in which the identification code is embedded to the transmission station or an area other than the area where the reception failure occurs When transmitting to other receiving stations arranged in
The transmitting station or the other receiving station that has received the distribution request specifies the one receiving station that has transmitted the distribution request, and transmits a program composed of video / audio signals related to broadcasting other than the satellite broadcasting. And
The broadcast receiving device of the one receiving station that has received a program composed of video / audio signals related to broadcasts other than the satellite broadcasts outputs video / audio signals related to broadcasts other than the satellite broadcasts substantially simultaneously,
The broadcast system according to any one of claims 4 to 7, wherein a program including video / audio signals related to broadcasts other than the satellite broadcast is reproduced as much as possible on the terminal. . The identification code as a private identification code encrypted in a predetermined format,
When the transmitting station or the other receiving station returns a program composed of video / audio signals related to broadcasts other than the satellite broadcast to the one receiving station that has transmitted the distribution request in which the private identification code is embedded. ,
The transmitting station or the other receiving station encrypts and transmits a program composed of video / audio signals related to broadcasting other than the satellite broadcasting,
The broadcast receiving device of the one receiving station that has received the program composed of the video / audio signal related to the broadcast other than the satellite broadcast, when the program is encoded by the encoding means, Decrypting the code and outputting video / audio signals related to broadcasts other than the satellite broadcast almost simultaneously,
9. The program according to claim 8, wherein an encrypted program composed of video / audio signals related to a broadcast other than the satellite broadcast is reproduced on the terminal as much as possible. Broadcasting system. The transmitting station and each receiving station are connected by a terrestrial digital TV line,
On the terrestrial digital TV line, video / audio signals related to broadcasting other than satellite broadcasting are transmitted from the transmitting station to the receiving station,
The broadcast receiving device that has received the video / audio signal related to the broadcast other than the satellite broadcast outputs the video / audio signal related to the broadcast other than the satellite broadcast substantially simultaneously,
5. The broadcasting system according to claim 4, wherein a program composed of video / audio signals related to broadcasting other than satellite broadcasting is reproduced as much as possible on the terminal.

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