JP3911706B2 - Transmission / reception system and reception apparatus - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a transmission / reception system and a receiving apparatus suitable for application to a broadcasting system or the like. Specifically, in addition to the broadcast signal, information specific to the region (information according to the region) is transmitted, and the receiving side searches for the information according to the region by the region code, and displays this information to display information specific to the region (weather map). , Maps, commercials, etc.).
[0002]
[Prior art]
With the development of digital technology, an interactive integrated digital broadcasting system (referred to as an ISDB (Integrated Services Digital Broadcasting) system) in which various kinds of information including broadcast signals are digitized is being researched and developed in the broadcasting industry.
[0003]
More specifically, the ISDB system is used for not only current broadcast signals (standard television signals, high-definition signals), but also software and facsimile data, as well as multimedia information such as voice, text, graphics, and images. It is a broadcasting system in which each is digitized (encoded), integrated and multiplexed, and then subjected to modulation processing matching the transmission form to be transmitted and received.
[0004]
When various types of information including broadcast signals are integrated and multiplexed, in addition to these pieces of information, additional information used as control information on the receiving side can also be integrated and multiplexed at the same time. The integrated ISDB broadcast signal (digital signal) is transmitted using ground waves, satellite waves, optical cables, or the like.
[0005]
On the receiving terminal side, it is possible to receive the integrated ISDB broadcast signal, discriminate the target signal, display it on the monitor and enjoy it as a normal television broadcast. (Save) or transfer to another terminal. Further, if the received additional information is used, the received information can be used according to the user's preference, such as monitor control, recording control, and processing control on the monitored image. That is, an interactive broadcasting system can be constructed.
[0006]
[Problems to be solved by the invention]
Therefore, if this ISDB system is used, the service content for the user is improved and the more interactive broadcasting system can be constructed as the variety of additional information to be transmitted increases.
[0007]
Now, in the current information transmission / reception system, like the captain system, various information such as sports and shopping stored in the information center (captain center) is selected using a telephone line, and instructions on the screen are displayed. There is something that allows you to select the information you need.
[0008]
This captain system is very convenient because the viewer (user) can obtain the necessary information just by using a telephone line and a TV. However, since it requires many steps to select specific information. In order to select information in the vicinity of the viewer, a relatively troublesome work is required. There is also a problem that a telephone line must be used each time it is used.
[0009]
If a broadcasting system capable of multiplex transmission of multi-channel broadcast signals is constructed, information effective only in a specific area as described above can be transmitted as a broadcast signal. By selecting a specific area, you can obtain information that is rich in local colors, which is very convenient.
[0010]
In view of this, the present invention is intended to achieve such a problem, and transmits specific information such as regional information so that it can be selectively received and stored.
[0011]
[Means for Solving the Problems]
In order to solve the above-described problem, the transmission / reception system according to claim 1 includes a first encoding unit that encodes a video signal and an audio signal and outputs first encoded information, and a plurality of regions. The second encoding means for encoding the region-specific information and outputting the second encoded information, at least the first encoded information, and information on each region in the region-specific information A transmission device having transmission means for multiplexing and transmitting the second encoded information into which the area code is inserted each time;
At least the first encoded information in which the video signal and the audio signal are encoded, and regional information that is specific information regarding a plurality of regions are encoded, and each region information in the regional information is encoded. Channel selection means for selecting a specific broadcast signal multiplexed with the second encoded information into which each area code is inserted, and the specific broadcast signal selected by the channel selection means Signal separating means for separating the first encoded information and the second encoded information; first decoding means for decoding the first encoded information and outputting the video signal and the audio signal; When the input region code matches the region code inserted into the second encoded information, the second encoded information corresponding to the region code is decoded, and the decoded region-specific information And a second decoding means for outputting Area information storage means for storing area information output from the decoding means, and position detection means for detecting the position of the apparatus and supplying an area code corresponding to the detected position to the second decoding means The position detecting means detects a position of the receiving apparatus, and a location information code having higher accuracy than the location code from the location information detected by the location detection portion. An area discriminating means for discriminating; and a memory means for accumulating the area information code discriminated by the area discriminating means and supplying an area code corresponding to the area information code to the second decoding means; after detecting the position operates the said memory means, is characterized in that the control to the position detection unit and the area determination means and hibernation.
[0013]
In order to solve the above-described problem, the receiving device according to claim 8 includes at least first encoded information in which a video signal and an audio signal are encoded, and specific information on a plurality of regions. A channel selection means for selecting a specific broadcast signal in which information is encoded and second encoded information in which each area code is inserted for each area information in the area-specific information is multiplexed; A signal separating means for separating the specific broadcast signal selected by the channel selecting means into the first encoded information and the second encoded information; and decoding the first encoded information When the first decoding means for outputting the video signal and the audio signal, the input region code, and the region code inserted in the second encoded information match, the region code corresponds to the region code. The second encoded information is decoded and decoded The second decoding means for outputting the regional information, the regional information storage means for storing the regional information output from the second decoding means, and the position of the apparatus are detected, and the detected position is Position detecting means for supplying a corresponding region code to the second decoding means, the position detecting means detecting a position of the receiving device, and position information detected by the position detecting section. Region identification means for identifying an area information code with higher accuracy than the area code, and the area information code determined by the area determination means are stored, and the area code corresponding to the area information code is stored in the second code and a memory means for supplying to the decoding means, after detecting the position operates the said memory means, control a child to the position detection unit and the region determination unit and dormant The one in which the features.
[0017]
As main information, in addition to broadcast signals such as programs, local information rich in local colors that cover areas where broadcast signals can be received is multiplexed and transmitted together with area codes, and this is decoded by the receiver. And memory. The decoding unit is given an area code, and only the area-specific information that matches the input area code is stored.
[0018]
As the input region code, a code generated by the control unit can be used, or an automatically generated code can be used. As a means of automatic generation, a GPS (Global Positioning System) system that automatically determines the latitude and longitude where the device is located and identifies the current position can be used. The area information code obtained from the GPS device is used as the area code, and this area code is given to the decoding unit. As a result, only the area information in the vicinity of the viewer is automatically stored in the memory means, so that the area information can be easily used.
[0019]
DETAILED DESCRIPTION OF THE INVENTION
Subsequently, an embodiment of a transmission / reception system and a receiving apparatus according to the present invention will be described in detail with reference to the drawings.
[0020]
FIG. 1 is a system diagram of a main part showing an embodiment of an ISDB transmitting apparatus 10 according to the present invention. In this example, as main information transmitted in an integrated manner for convenience of explanation, standard television signals and high-definition signals are used. It is assumed that the data is various data information. Then, additional information such as control information is added to each of them and multiplexed. Various kinds of additional information can be considered. A time code etc. can be considered about a standard television signal and a high-definition signal.
[0021]
Referring to FIG. 1, the video signal SVN of the standard television signal is supplied to the terminal 12a, and the audio signal SAN associated therewith is supplied to the terminal 12b. The encoding unit 14 performs appropriate encoding processing including compression and the like. Is given. In synchronization with this encoding process, the additional information generating means 16 operates to generate additional information such as control information. In this example, a time code is illustrated as additional information, and thus the time code generating unit 16 is configured. The encoded standard television signal and time code TC are supplied to the multiplexing unit 20 and multiplexed together with other information.
[0022]
The video signal SVH of the high-definition signal is supplied to the terminal 22a, and the audio signal SAH associated therewith is supplied to the terminal 22b, and an appropriate encoding process including compression is performed by the encoding unit 24. In this example as additional information generating means in synchronization with this encoding process, the time code generating unit 26 is activated to generate a predetermined time code.
[0023]
Various data SD such as computer data and facsimile data is supplied to the terminal 28 a and is encoded by the encoding unit 30. At the same time, the additional information generating means 32 is activated to generate corresponding additional information. As the additional information, data type, area designation for enlargement / reduction, and the like can be considered.
[0024]
In the present invention, specific information (information for each area) regarding a plurality of areas among areas (service areas) where a broadcast signal can be received is used as one of the data. This area-specific information is information specific to the area, such as the local weather forecast (the day, next day, week, month, etc.), phone book, map, and map, government offices, financial industry, market, restaurant, barber shop For example, a map based on a specific industry required as town information, business hours of a specific industry, specific information closely related to the area such as service contents, and commercial information can be considered.
[0025]
These area-specific information is information collected on the basis of, for example, each area of a municipality (regardless of size) that exists in the area covered by the broadcast signal, and preferably the service area covered by the broadcast signal. All municipalities are covered. It is necessary to solve problems such as transmission time to transmit information of all municipalities by broadcast signals. However, as a matter of fact, it is often sufficient to refer to magazines that are already on the market for sightseeing spots and red light districts, etc. It can be narrowed down to some extent, and that will lead to improved service.
[0026]
As shown in FIG. 1, encoded information and additional information obtained from each are multiplexed in a multiplexing unit 20. In the multiplexing unit 20, for example, a process is performed in which each piece of encoded information is packetized and multiplexed for error correction is multiplexed in units of transmission frames to form a bit stream.
[0027]
Therefore, the above-mentioned area-specific information is also compressed and multiplexed together with the area code indicating the area. Then, for example, as shown in FIG. 2A, information by region can be inserted after the packet header and transmitted together with other main information. The area-specific information is attached with an area code indicating the corresponding area as shown in FIG.
[0028]
Fig. B shows an example of commercial information, where the information provider indicates a commercial provider of a specific industry, and the following specific information is specific business content or service content of the commercial destination. Offered as. It is also possible to provide regional information in a hierarchical manner by attaching a subcode to the regional code.
[0029]
The multiplexed data is modulated by the transmitter 34 shown in FIG. 1 into an ISDB broadcast signal having a transmission form suitable for a transmission means (for example, a broadcast satellite). (Antenna) 38 is transmitted toward the broadcasting satellite.
[0030]
FIG. 3 shows an example of a receiving apparatus 40 according to the present invention for receiving such an ISDB broadcast signal. The satellite wave received by the receiving antenna (parabolic antenna) 42 is down-converted to a 1 GHz band by the down converter 44 and then supplied to the ISDB tuner 46 for channel selection processing. Therefore, the ISDB broadcast signal of a specific channel is selected by the channel selection signal SC from the terminal 48.
[0031]
The selected ISDB broadcast signal is supplied to the signal separation unit 50 and separated into original main information and additional information. For example, when a specific channel of a standard television signal is selected, the standard television signal and additional information (time code or the like) associated with the specific channel are separated. The separated standard television signal is decoded by the decoding unit 52, and the video signal SV (SVN) and the audio signal SA (SAN) are respectively decoded and supplied to the monitor (CRT or the like) 54 to display the video. .
[0032]
Of the information separated by the signal separation unit 50, the data information related to the data SD is supplied to another decoding unit 56, and the regional information is decoded. Since the received regional information includes a large number of regions existing in the service area, it is often unnecessary data for viewers living in a specific region. Therefore, a region code is input in advance, and only the region-specific information in which the region code matches the received region code is decoded, and the decoded data is stored in the memory means 74 at the subsequent stage. As the memory means 74, a semiconductor memory (RAM or the like), a magneto-optical disk recording / reproducing apparatus, or the like can be used.
[0033]
The region code can be entered manually or automatically. In the case of manual input, the region code generated by the control unit 70 is given to the decoding unit 56 via the OR circuit 72. The control unit 70 is controlled based on a command from a commander 80 as an input control device as shown in FIG.
[0034]
For example, as shown in FIG. 4, the commander 80 is provided with a channel selection numeric keypad (10 key) 84, a channel selection switch 86, and a volume switch 88 in addition to the power switch 82, and further selects a display mode for the monitor 54. A switch 90 is provided. The cursor key 92 is a key for moving a cursor (not shown) displayed on the screen.
[0035]
The following devices can be used for automatic input of region codes. In this example, the GPS system is used. As is well known, the GPS system is a system that catches signals from a plurality of satellites, automatically calculates and indicates the position from the longitude and latitude where the GPS device is placed, and this is the driving position of the car. It is applied to an automatic tracking device that indicates with a cursor on a map displayed on the screen. When this GPS system is used, the position of the receiving device 40 can be accurately detected, so the area information code obtained at this time can be used as the above-described area code.
[0036]
Therefore, the GPS device 60 shown in FIG. 3 is configured as follows. The position signals from a plurality of satellites received by the receiving antenna 62 are supplied to the GPS receiving unit 64, the position of the GPS device 60 is automatically calculated, and the position information as the calculation result is supplied to the area discriminating means 66 to receive the reception area. It is converted into the area information code assigned to the. This area information code is stored in a memory means 68 such as a RAM. After the position is detected, only the memory means 68 can be operated, and the others can be controlled to be in a resting state. This saves power.
[0037]
The area information code is supplied to the decoding unit 56 via the OR circuit 72, and this area information code is used as the area code. Therefore, when the GPS device 60 detects the position where the receiving device 40 is placed, only the information related to the area is automatically stored in the decoding unit 56 using the area information code.
[0038]
Here, since the area information code can be obtained with an accuracy of several meters to several tens of meters, it is possible to reliably cover, for example, an area code given in units of municipalities. In order to clarify the correspondence between the area information code and the area code, a table (memory) for automatically converting the area information code into the area code can be prepared. In this case, this table is stored in the memory means 68 described above. It can also be used.
[0039]
The region-specific information stored in the memory means 74 is further selected by the selector 76, and the selected specific region-specific information is displayed on the monitor 54. The reason for selecting the region-specific information is to allow the viewer to freely select information that is necessary and information that is not necessary even in the same region-specific information. The selector 76 is controlled by the output of the control unit 70. When the area-specific information is hierarchized, for example, a hierarchizing code can be directly given to the memory means 74 so that only specific information is read. In this case, the selector 76 is unnecessary. The decoding output from the decoding unit 52 and the region-specific information are selected by the selector 78, and the video is displayed in a state where either one or both are combined. The selector 78 is controlled by the commander 80.
[0040]
The regional information selected by the selector 76 can be given to other information terminals. For example, if a fax or the like is connected, this regional information (binary data) can be provided to another user. The means for detecting the position where the receiving device 40 is placed is not limited to the GPS device 60. For example, it is possible to measure the electric field strength of television broadcast waves transmitted from a plurality of areas, and to detect the position of Oma.
[0041]
When the receiving device 40 is mounted on an automobile or the like, it is convenient because the GPS device itself mounted on the automobile can be used as a position discriminating means, and only information that matches the area where the automobile is moving is selectively used. It can be used automatically as a source of entertainment information.
[0042]
【The invention's effect】
As described above, in the transmission / reception system and the receiving apparatus according to the present invention, the region-specific information is transmitted in addition to the broadcast signal, and the region-side information is given by giving the region code on the receiving side. It can be automatically selected.
[0043]
According to this, only the information related to the area can be automatically obtained. In obtaining information, if a region code is given, then only the information that matches the region code can be automatically stored. Therefore, it has a feature that necessary information can be obtained more easily than the current captain system. In addition, after the position of the receiving device is detected, the memory unit is operated to control the position detecting unit and the area discriminating unit to be in a dormant state , so that the receiving device can save power. Therefore, the present invention is very suitable when applied to an ISDB system for digital broadcasting.
[Brief description of the drawings]
FIG. 1 is a system diagram of an essential part showing an embodiment of an ISDB transmission device according to the present invention.
FIG. 2 is a diagram illustrating an example of inserting regional information.
FIG. 3 is a system diagram of an essential part showing an embodiment of an ISDB receiver according to the present invention.
FIG. 4 is a diagram illustrating an example of a commander.
[Explanation of symbols]
10 ISDB transmitter 14, 24, 30 Encoding unit 16, 26 Time code generating means (additional information generating means)
20 Multiplexer 32 Additional information generator 46 ISDB tuners 52 and 56 Decoder 54 Monitor 60 Position discriminator 64 GPS receiver
74 Memory (Information storage means by region)
76 selector (first selector)
78 selector (second selector)

Claims (14)

First encoding means for encoding a video signal and an audio signal and outputting first encoded information;
A second encoding unit that encodes regional information that is specific information regarding a plurality of regions and outputs second encoded information;
A transmission unit that multiplexes and transmits at least the first encoded information and the second encoded information into which each region code is inserted for each region information in the region-specific information. Equipment,
At least the first encoded information in which the video signal and the audio signal are encoded, and regional information that is specific information regarding a plurality of regions are encoded, and each region information in the regional information is encoded. Channel selection means for selecting a specific broadcast signal multiplexed with the second encoded information into which each area code is inserted;
Signal separating means for separating the specific broadcast signal selected by the channel selecting means into the first encoded information and the second encoded information;
First decoding means for decoding the first encoded information and outputting the video signal and the audio signal;
When the input region code matches the region code inserted into the second encoded information, the second encoded information corresponding to the region code is decoded, and the decoded region-specific information Second decoding means for outputting
Area-specific information storage means for storing area-specific information output from the second decoding means;
A receiving device having position detecting means for detecting the position of the apparatus and supplying a region code corresponding to the detected position to the second decoding means;
The position detecting means includes
A position detector for detecting the position of the receiver;
Area discriminating means for discriminating an area information code having higher accuracy than the area code from the position information detected by the position detecting unit;
Memory means for accumulating the area information code determined by the area determination means and supplying an area code corresponding to the area information code to the second decoding means;
Transmitting and receiving system after detecting the position, which operates the said memory means, and controls so that the position detecting unit and the local determination unit and dormant.   2. The transmission / reception system according to claim 1, further comprising control means for supplying an area code as an input signal from an external commander to the second decoding means. The position detection section,
The transmission / reception system according to claim 1, wherein the transmission / reception system is a GPS receiver that receives position signals from a plurality of satellites. The upper Symbol memory means,
The transmission / reception system according to claim 1 , wherein a table for converting the area information code into the area code is stored, and the area code corresponding to the input area information code is output. The position detection section,
The transmission / reception system according to claim 1, wherein the position of the receiving device is detected based on electric field strength of television broadcast waves transmitted from a plurality of areas.   2. The first selector according to claim 1, further comprising a first selector that selectively outputs a plurality of pieces of regional information stored in the regional information storage means in response to a selection signal from the outside. Transmission / reception system. Furthermore, a control unit that outputs a control signal corresponding to a selection signal from the outside,
A second that selectively outputs the video signal decoded by the first decoding means, the audio signal, and the region-specific information output from the first selector in response to a control signal from the control unit; The transmission / reception system according to claim 6 , further comprising: a selector. At least the first encoded information in which the video signal and the audio signal are encoded and the regional information that is specific information regarding a plurality of regions are encoded and for each region information in the regional information. Channel selection means for selecting a specific broadcast signal multiplexed with second encoded information into which each area code is inserted;
Signal separating means for separating the specific broadcast signal selected by the channel selecting means into the first encoded information and the second encoded information;
First decoding means for decoding the first encoded information and outputting the recorded video signal and the audio signal;
When the input region code matches the region code inserted into the second encoded information, the second encoded information corresponding to the region code is decoded, and the decoded region-specific information Second decoding means for outputting
Area-specific information storage means for storing area-specific information output from the second decoding means;
Position detecting means for detecting the position of the apparatus and supplying a region code corresponding to the detected position to the second decoding means;
The position detecting means includes
A position detector for detecting the position of the receiver;
Area discriminating means for discriminating an area information code having higher accuracy than the area code from the position information detected by the position detecting unit;
Memory means for accumulating the area information code determined by the area determination means and supplying an area code corresponding to the area information code to the second decoding means;
After detecting the position operates the said memory means, receiving apparatus and controls so that the position detecting unit and the local determination unit and dormant. 9. The receiving apparatus according to claim 8 , further comprising control means for supplying a region code as an input signal from an external commander to the second decoding means. The position detection section,
The receiving device according to claim 8 , wherein the receiving device is a GPS receiving unit that receives position signals from a plurality of satellites. The upper Symbol memory means,
9. The receiving apparatus according to claim 8 , wherein a table for converting the area information code into the area code is stored, and the area code corresponding to the input area information code is output. 9. The receiving apparatus according to claim 8 , wherein the position detecting means detects the position of the receiving apparatus based on electric field strength of television broadcast waves transmitted from a plurality of areas. 9. The apparatus according to claim 8 , further comprising a first selector that selectively outputs a plurality of pieces of regional information stored in the regional information storage means in response to a selection signal from the outside. Receiver device. Furthermore, a control unit that outputs a control signal corresponding to a selection signal from the outside,
A second that selectively outputs the video signal decoded by the first decoding means, the audio signal, and the region-specific information output from the first selector in response to a control signal from the control unit; receiver according to claim 1 3, characterized in that a selector.

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