JP3969852B2 - Mobile communication system and communication device - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a communication system using a camera mounted on an automobile or the like and a position detection device such as a car navigation apparatus, and relates to wireless transmission and reception of image data from the camera.
[0002]
[Prior art]
In recent years, many electronic devices have been installed in automobiles. Among them, a car navigation device that measures the position of the vehicle by a signal from a GPS (Global Positioning System) satellite and displays driving guidance on a liquid crystal display or the like is remarkable.
[0003]
FIG. 14 is a block diagram showing an example of a conventional car navigation apparatus.
[0004]
201 is a system controller, 202 is a ROM that stores a program, 203 is a RAM that is used for storing operation modes and storing map data, 204 is a gyroscope, etc., and includes vehicle speed and turning angle, etc. Is an autonomous measuring unit that detects and outputs the information to the system controller 201, 205 is a GPS antenna, 206 is a GPS unit, 207 is a key input unit including a remote control and a main body input unit, and 208 is a CD-ROM that provides map information 209 is a CD-ROM controller, 210 is a display screen drawing processing unit, 211 is a VRAM for storing the display screen, 212 is a display device composed of liquid crystal, etc., 213 is an internal bus, 214 Is an input of traveling data such as vehicle speed and turning information.
[0005]
Under such a configuration, the system controller 201 always calculates and calculates the position of the vehicle from GPS information and autonomous traveling data, and outputs a traveling guidance display.
[0006]
The car navigation device is an effective device that provides a more comfortable interior space with more functions such as the position of the vehicle as a vehicle guidance device, display of map information, and playback of TV images and music.
[0007]
[Problems to be solved by the invention]
However, although the conventional car navigation system has been enhanced as a driving guide function, it can be used in next-generation automobiles such as an environment in which various data can be freely transmitted and received between automobiles, which is captured by an in-vehicle camera equipped with images during driving. It has not been put into practical use in terms of integration with devices and functions.
[0008]
When considering a means to transmit various data, especially image data captured by an in-vehicle camera, while driving between multiple cars, the monitor of the car navigation device can be an effective device as its display device. However, there are differences in image and signal processing, and image data cannot always be displayed. Therefore, an environment in which image data can be transmitted / received using a communication means without any problem between different types of car navigation apparatuses and can be displayed is desired.
[0009]
  The present invention has been made under such circumstances, and provides a mobile communication system and a mobile communication system capable of transmitting and receiving desired image information.BiddingIt is an object to provide a communication device.
[0010]
[Means for Solving the Problems]
  In order to achieve the above object, in the present invention, the inter-mobile communication system is configured as follows (1)., ThroughThe following (2))ofConfigure as follows.
  (1) An inter-mobile communication system configured to include a movable receiving device and a transmitting device,
  The receiving device is:
  Detect the location of your deviceFirstPosition detecting means;
  First request information for reproducing and transmitting recorded image information in accordance with position information based on the position detected by the first position detecting unit to the transmission apparatus, and real-time at the position of the transmission apparatus And second request information for sending image information.A request generation means to generate;
  Generated by the request generation meansThe firstRequest informationAnd selectively selecting the second request informationCommunication means for transmitting to the transmission device and receiving image information transmitted from the transmission device;
  The transmitter is
  Imaging means for capturing a subject image and generating image information;
  Detect the location of your deviceSecondPosition detecting means;
  In the image information generated by the imaging means,SecondDetected by position detection meansWhen shootingAdd location informationAnd a recording medium connected to the imaging meansRecording means for recording;
  Receiving means for receiving the first request information and the second request information transmitted from the receiving device;
  Reproducing means for retrieving and reproducing recorded image information recorded on the recording medium based on position information included in the first request information when the receiving means receives the first request information. When,
  When the first request information is received by the receiving means, image information reproduced by the reproducing means is transmitted to the receiving device, and when the second request information is received, the imaging is performed. Transmitting means for transmitting real-time image information generated by the means to the receiving device;
WithTransferCommunication system between moving bodies.
  (2) Movement that functions as an image transmission devicePossibleA communication device,
  Imaging means for capturing a subject image and generating image information;
  Position detecting means for detecting the position of the device itself;
  Detected by the position detection means on the image information generated by the imaging meansWhen shootingAdd location informationAnd a recording medium connected to the imaging meansRecording means for recording;
  From an external receiverReceiving means for receiving first request information for requesting recorded image information and second request information for requesting real-time image information;
  Reproducing means for retrieving and reproducing recorded image information recorded on the recording medium based on position information included in the first request information when the receiving means receives the first request information. When,
  When the first request information is received by the receiving means, image information reproduced by the reproducing means is transmitted to the receiving device, and when the second request information is received, the imaging is performed. Transmitting means for transmitting real-time image information generated by the means to the receiving device;
WithRuCommunication device.
[0034]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described in detail with reference to an embodiment of an inter-vehicle communication system. The present invention is not limited to between automobiles, and is a communication system between appropriate mobile units of the same type, such as between trains, between ships, between aircrafts, and between different types of mobile units such as between cars and trains. The same can be done.
[0035]
Furthermore, it can be similarly implemented by communicating with a mobile body as a fixed station, a communication satellite or the like as a base station (previously storing a video at a predetermined point) or a relay station.
[0036]
Further, the present invention is not limited to the form of a communication system, but can be similarly implemented in the form of a communication method and further in the form of a storage medium such as a CD-ROM storing a program for realizing the communication method.
[0037]
【Example】
FIG. 1 is a conceptual diagram of an “automobile communication system” as an embodiment. The figure shows a state in which image data is transmitted and received by wireless communication between the automobile (1) 101 and the automobile (2) 102, each equipped with a GPS navigation device using radio waves from the GPS satellite 103. The image data referred to in this embodiment means both a still image and a moving image. In FIG. 1, the wireless communication between the automobile (1) 101 and the automobile (2) 102 can be executed not only during traveling.
[0038]
In the wireless communication in FIG. 1, radio waves are transmitted and received from the antenna 104 and the antenna 105. As a wireless communication method here, communication using a mobile phone, spread spectrum communication method, and the like can be considered. Since the mobile phone communication system is known, a supplementary description is omitted, but the configuration of the spread spectrum communication system and the outline of the communication operation will be briefly described here.
[0039]
FIG. 2 shows a configuration block diagram of the transmission unit of the spread spectrum communication apparatus, and FIG. 3 shows a configuration block diagram of the reception unit.
[0040]
First, in FIG. 2, 501 is a serial-parallel converter, 502-1 to n are multipliers, 503 is a spread code generator, 504 is an adder, and 505 is a radio frequency (RF) converter for converting to a transmission frequency signal. , 506 are transmitting antennas.
[0041]
The operation of the transmission unit of the spread spectrum communication apparatus configured as described above will be described below.
[0042]
The input data is converted into n parallel data by the serial-parallel converter 501. Each of the converted data is multiplied by n different spread code outputs from the spread code generator 503 in n multipliers 502-1 to 502-1 to be converted into n-channel wideband spread signals. Next, the outputs of the multipliers are added by the adder 504 and output to the RF converter 505. In the RF converter 505, the added baseband wideband spread signal is converted into a transmission frequency signal having an appropriate center frequency and transmitted from the transmission antenna 506.
[0043]
Next, in FIG. 3, 511 is a receiving antenna, 512 is a radio frequency (RF) converter, 513-1 to n are correlators, 514-1 to n are spread code generators, 515-1 to n are synchronous circuits, Reference numerals 516-1 to n denote demodulators and reference numeral 517 denotes a parallel-serial converter.
[0044]
The operation of the receiving unit of the spread spectrum communication apparatus configured as described above will be described below.
[0045]
The transmission signal received by the receiving antenna 511 is appropriately filtered and amplified by the RF converter 512 and converted into an intermediate frequency signal. The intermediate frequency signal is distributed to channels corresponding to n spread codes connected in parallel. In each channel, correlators 513-1 to n perform correlation detection with outputs from spreading code generators 514-1 to 51-n corresponding to the respective channels, and synchronization circuits 515-1 to n establish synchronization for each channel. Then, the code phases and clocks of the respective spread code generators 514-1 to 51n are made to coincide with each other, and the demodulator 516-1 to 516-1 to demodulate and reproduce the data. Further, the reproduced data is converted into serial data by a parallel / serial converter 517 and returned to the original data.
[0046]
The above is the configuration of the basic block diagram of the transmission unit and the reception unit and the communication operation in the spread spectrum communication system.
[0047]
A transmission device and a reception device in the spread spectrum communication system as described above are used as wireless communication means.
[0048]
Next, the configuration of the system of the present embodiment mounted on the automobile shown in FIG. 1 is shown in a block diagram 4 and will be described.
[0049]
1 is a system controller, 2 is a ROM for storing programs and various data, 3 is a RAM used for storing operation modes and map data, 4 is a gyro, etc. An autonomous measuring unit that detects the detected angle and outputs the information to the system controller 1, 5 is a GPS antenna, 6 is a GPS unit, 7 is an in-vehicle camera that can capture both moving images and still images, 8 is a camera signal processing circuit, Reference numeral 9 denotes an image storage unit including a disk-shaped recording medium for storing image data captured by the in-vehicle camera and a recording / reproducing apparatus thereof, and 10 denotes an image for converting and adjusting the image data for display or transmission of the image data. An adjustment unit, 11 is a key input unit including a remote controller and a main body input unit, and 12 is a CD-RO that reproduces a CD-ROM that provides map information. Device, 13 is a CD-ROM controller, 14 is a display screen drawing processing unit, 15 is a VRAM for storing the display screen, 16 is a display device composed of liquid crystal or the like, 17 is a compression / decompression processing circuit for image data, Reference numeral 18 denotes a communication interface, and reference numeral 19 denotes a wireless transmission / reception unit serving as an input / output unit for data to be wirelessly communicated. A wireless communication unit such as a cellular phone or spread spectrum is connected thereto via a predetermined circuit. Furthermore, 20 is an internal bus, 21 is an input of travel data such as vehicle speed and information of turning, and is also used for autonomous travel measurement.
[0050]
With the configuration shown in FIG. 4, the system controller 1 calculates the position of the vehicle from the autonomous traveling data determined from the information from the GPS unit 6 and the traveling data, and travels using the map information recorded on the CD-ROM. In addition to a navigation function that outputs a guidance display, image data captured by the in-vehicle camera 7 can be compressed and recorded, displayed on the display device 16, and image data and other command data can be transmitted from the wireless transmission / reception unit 19 via wireless communication. Etc., and display of received image data on the display device 16, control of command input / output, control based on commands, and the like are also executed. Each of these units is integrally controlled by the system controller 1 and can be an operation control command by receiving an instruction from the user to the key input unit 11.
[0051]
As shown in FIG. 5, the in-vehicle camera 7 is mounted in the vehicle and is provided so as to image the front of the vehicle. However, the direction of the camera may be directed to an arbitrary direction as necessary, and the attachment position may be arbitrary. Even if it is a camera which images the back of a car, and even if a plurality of cameras, such as the front and back, are attached, it is within the meaning of the present invention.
[0052]
Next, in order to explain the transmission of image data, the block of the part related to the transmission in the system of this embodiment including the car navigation device in the transmission side automobile is shown in FIG.
[0053]
6 include the system controller 1, the autonomous measuring unit 4, the GPS antenna 5, the GPS receiving unit (inside the unit) 6, the on-vehicle camera 7, the camera signal processing circuit 8, and the image storage unit already described in FIG. 9, an image adjustment circuit (in the image adjustment unit) 10, a compression / decompression circuit 17, a wireless transmission / reception unit 19, and a vehicle position detection unit that is a part of the system controller 1 and detects the vehicle position and outputs it as position information 31 is an image adjustment setting unit 32 that is a part of the image adjustment unit and performs settings for conversion and adjustment of an image method such as the format, size, and data amount of the image data, and is also a part of the image adjustment unit. It consists of a compression method setting circuit 33 and a synthesis unit 34 for making settings for converting the compression format of image data.
[0054]
Next, the operation will be described.
[0055]
The GPS antenna 5 receives radio waves transmitted from GPS satellites, and the GPS receiver 6 performs position determination processing by GPS. In the place where the GPS information and the satellite radio wave do not reach, the autonomous measuring unit 4 also considers the autonomous running data, and the system controller 1 performs processing for navigation.
[0056]
In addition, the vehicle position detection unit 31 detects and outputs position information as recording data from the GPS information and the position information determined by the system controller 1.
[0057]
Further, the image taken by the in-vehicle camera 7 is digitized by the camera signal processing circuit 8 and necessary signal processing is performed on each of the color signal and the luminance signal to become image data. The image data output from the camera signal processing circuit 8 is multiplexed with the recording position information from the vehicle position detection unit 31 by the combining unit 34 and reaches the compression / decompression processing circuit 17. Here, the image data is compressed by a predetermined compression method. The advantage of compression is to reduce the recording amount and improve the transmission efficiency. JPEG and JBIG are preferable for still images, and MPEG1, MPEG2 and MPEG4 are preferable for moving images. However, the compression is not limited thereto. In the present embodiment, it is assumed that image data is compressed and recorded and transmitted mainly using JPEG and MPEG4 in consideration of communication between vehicles, display size of a car navigation device, and the like. However, a configuration capable of supporting other compression methods and image formats is realized, and a configuration capable of conversion to another image format at the time of transmission is adopted.
[0058]
Here, since JPEG is publicly known and publicly available, description thereof will be omitted, but the development background and configuration of MPEG4 will be briefly described below with reference to the drawings.
[0059]
In recent years, with the advancement of image encoding technology and the advancement of computers, a method of dividing and encoding for each object in an image has begun to be proposed. By encoding an image in units of objects, it is possible to improve the encoding efficiency by performing an optimal code for each object, and at the same time, obtain a function of generating a new image by editing an object in the image it can. An encoding method for each object of a moving image is studied as an international standard MPEG4 (reference: “Standardization trend of MPEG4”, Eito, Journal of the Institute of Image Electronics Engineers of Japan, Vol. 25, No. 3 (1996) pp. 223-228).
[0060]
An example of the target screen is shown in FIG. FIG. 7 shows one frame of a moving image. The frame 401 in FIG. 7 is composed of four objects indicated by a to d. That is, an object a representing a background, an object b representing a helicopter, an object c representing a train, and an object d representing a car. In order to express these shapes, the objects other than the background have a mask in which the black portion is out of the region and the white portion is in the region, as shown in FIGS. By encoding, an object of any shape can be handled. That is, the mask 406 corresponds to the object 403, the mask 407 corresponds to the object 404, and the mask 408 corresponds to the object 405.
[0061]
An outline of the encoding is shown in FIG. The input image 301 is input to the object separation unit 302 and separated into respective objects. In the image of FIG. 7, the images are separated into objects 402, 403, 404, and 405. Each separated object is encoded independently. That is, the object 402 is encoded by the object encoding unit 303, the object 403 is encoded by the object encoding unit 304, the object 404 is encoded by the object encoding unit 305, and the object 405 is encoded by the object encoding unit 306. The encoded data obtained by the object encoding units 303 to 306 are collected by the multiplexer 307 and transmitted as code data 308.
[0062]
Next, the outline of decoding is shown in FIG. The code data 308 is input to the demultiplexer 309 and separated into encoded data for each object. The separated encoded data is decoded independently. That is, the object 402 is decrypted by the object decryption unit 310, the object 403 is decrypted by the object decryption unit 311, the object 404 is decrypted by the object decryption unit 312, and the object 405 is decrypted by the object decryption unit 313. The image data obtained by each of the object decoding units 310 to 313 is arranged at a position where each object is to be located by an object synthesizing unit 314, and one image is synthesized to obtain a reproduced image 315.
[0063]
The above is a rough description of MPEG4.
[0064]
Returning to the description of FIG. 6, the image data compressed through the compression processing of the compression / decompression circuit 17 of FIG. 6 reaches the recording system and the transmission system.
[0065]
When image data is recorded, it is recorded in the image storage unit 9. The storage format of the image data stored in the image storage unit 9 composed of a writable recording medium is as shown in FIG. Each image data includes an ID part, a position information part, and image data. ID information such as an address is stored in the ID section, and information (position information) such as latitude and longitude for specifying the geographical position output from the vehicle position detection section 31 is stored in the position information section. In the image data portion, moving image or still image data is sequentially stored.
[0066]
The compressed image data reproduced from the image data storage unit 9 or the image data compressed by the compression circuit 17 by the input from the camera is controlled by the system controller 1, the image adjustment circuit 10, and the image prior to wireless transmission. The system setting circuit 32 and the compression system setting circuit 33 perform image adjustment and conversion processing. Specific image adjustment means that when a request is received from the receiving device that is the transmission destination, device information is received at the same time. In consideration of the above information (ROM information) etc., the image data is thinned out and the additional information Add and adjust the image format. In particular, for the image compression method, conversion processing such as conversion of the compression method, conversion from MPGE4 to MPEG2, MPEG1, or non-compression is performed while appropriately adding feedback to the compression / decompression circuit 17. If the receiving device can process MPEG data, it can transmit image data compressed in the corresponding MPEG format, and if not, it can decompress and transmit uncompressed image data. Become.
[0067]
Thereafter, the adjusted image data is transmitted from the wireless transmission / reception unit 19 via wireless communication, a mobile phone, or the like. Of the data received by the wireless transmission / reception unit 19, command data such as a transmission request reaches the system controller 1 and becomes a control command for image transmission.
[0068]
Next, FIG. 11 shows a block of a part related to reception of a transmission request and image data in a vehicle on the receiving side equipped with a system including the car navigation device of this embodiment.
[0069]
11 include the system controller 1, ROM 2, autonomous measurement unit 4, GPS antenna 5, GPS reception unit (inside unit) 6, drawing processing circuit 14, display device 16, expansion circuit already described in FIG. 4. (Part of compression / decompression circuit) 17, wireless transmission / reception unit 19, and part of the system controller 1, which detects the vehicle position and outputs it as position information; The type of image that can be handled from the configuration of each unit, the configuration and capability of the display means, etc. are generated as device information, and an instruction command for the real-time image transmission mode or stored image transmission mode is generated for the transmission device and output as a request. Request generating unit 41, position information detecting unit 42 for detecting position information from wirelessly transmitted data, and combining unit 4 , And a data separating unit 44.
[0070]
Next, the operation will be described.
[0071]
The GPS antenna 5 receives radio waves transmitted from GPS satellites, and the GPS receiver 6 performs position determination processing by GPS. In the place where the GPS information and the satellite radio wave do not reach, the autonomous measuring unit 4 also considers the autonomous running data, and the system controller 1 performs processing for navigation.
[0072]
The own vehicle position detecting unit 31 detects information indicating the own vehicle position from the GPS information and the position information determined by the system controller 1 and outputs the detected information as data. In addition, the request generator 41 generates image information by collecting and outputting necessary information from the ROM 2 or the system controller 1 such as image formats, screen sizes, functions, etc. that can be supported by the device itself, and the like. Data is obtained as device information to be sent to the transmission side device, and real-time image data from the vehicle equipped with the transmission side device is obtained or stored in the past according to the user's selection input from the key input unit 11 It is selected whether the acquired image is read out and acquired from the image storage unit of the transmitting device, and the mode selection instruction information is output as a request together with the device information. Then, the vehicle position information and the request are combined by the combiner 43, and transmitted as a transmission request from the wireless transmission / reception unit 19 to the transmission side device by wireless means to receive image data.
[0073]
When the transmission side device receives the transmission request, the transmission side device determines the transmission mode of the stored image or the transmission of real-time image data. In the real-time mode, the currently captured image data is stored in real time in the stored image transmission mode. In this case, stored image data having the corresponding position information is read from the storage device based on the position information on the receiving side in the transmission request, and transmission control is performed.
[0074]
Next, when receiving the image data, first, the image data main body and position information as additional information are separated from the image data received by the wireless transmission / reception unit 19. The image data is expanded by the expansion circuit 17 and displayed on the display device 16. The position information is detected by the position information detection unit 42 as position information indicating the position of the transmitting vehicle in the real time mode and the stored position in the stored image transmission mode, and reaches the drawing processing circuit 14. It is mixed with the map data supplied from the CD-ROM and can be displayed on the display device 16.
[0075]
The above is description of operation | movement of the receiving side apparatus of FIG. By adding additional data to the position information output from the vehicle position detection unit 31 and calculating and setting an arbitrary position, for example, a point several kilometers ahead of the vehicle position, the stored image is stored in the transmission side device. If there is, the stored image data at the position can be obtained.
[0076]
FIG. 12 shows the state of monitoring at the receiving vehicle in the real time mode. As an example of a navigation display screen, a map screen 602 created from map information read from a CD-ROM is displayed on the display device 601 as a base, and a real-time image 603 from the opponent's transmission vehicle preceding a part of the screen is displayed. it's shown. And the position where the own vehicle and the other party vehicle are shown by characters such as arrows based on the respective position information. Obtaining the video from the preceding vehicle in this way also has an effect as travel guidance while knowing the congestion state or confirming the actual landscape image of the preceding point.
[0077]
Also, in the stored image readout mode, it is possible to read out and receive an image that is captured and stored when the preceding vehicle passes the position where the preceding vehicle is currently located, from the preceding preceding vehicle, so that an actual landscape image is used for driving guidance It can be displayed and is particularly effective in complicated alleys. At this time, a stored image at an arbitrary position can also be requested by adjusting the position information based on the position information of the position where the receiving vehicle is located.
[0078]
Next, the operation related to the wireless transmission of image data using this embodiment will be described with reference to a flowchart shown in FIG. In the flowchart of FIG. 13, a state relating to wireless transmission between the transmission side and the reception side is indicated by a bold line.
[0079]
First, in the mode for executing the operation of the present embodiment, in step S1, the receiving side generates the transmission request already described and wirelessly transmits it. As Step S2, when the designated or optional mounted navigation device that keeps the state where the transmission request can be received, receives the transmission request of Step S1, it is controlled so as to transmit image data thereafter. It becomes the side equipment. Subsequently, in step S3, the transmission side device determines transmission mode information from the transmission request. When the transmission mode requests a real-time image from the camera, the transmission side device flows to the camera image input side in step S5 and stores it. When it is requested to read out certain image data, the flow proceeds to the stored image transmission mode side in step S8.
[0080]
As the real-time image transmission mode, an image is input from the in-vehicle camera on the transmission side in step S5, the position information of the own vehicle is multiplexed on the image data based on GPS information or the like in step S6, and the image data input from the camera in step S7 Compress.
[0081]
As the stored image transmission mode, the stored image transmission mode is set in step S8, and then the reception side position information in the transmission request transmitted from the reception side in step S9 is used as stored image data search information. A corresponding one is retrieved from the position information of each image data stored in the medium. Here, when image data having the corresponding position information is stored as step S10, the reproduction processing of the image data is performed as step S11. If there is no corresponding stored image in step S10, the flow ends here.
[0082]
In the real-time transmission mode, the input image data from the camera compressed in step S7 or the image data reproduced in step S11 in the stored image transmission mode is subjected to the image adjustment in step S12. As described above, this image adjustment is a conversion process of image data corresponding to the unique device information of the receiving side device performed by the image adjustment circuit. After the image adjustment in step S12, the image data is wirelessly transmitted in step S13.
[0083]
On the other hand, on the receiving side, after transmitting the request in step S1, the image data enters a reception standby for image data, and if the real-time or reproduced image data transmitted through the processing on the transmitting side is received in step S14, the image in step S16. It leads to expansion. If the image data is not received in step S14, the elapse of the predetermined time is determined in step S15. If the predetermined time has not elapsed, the image is to be transmitted if the predetermined time has elapsed while standing by to wait for reception. The flow ends here because there is no data or communication is not possible due to an accident.
[0084]
In step S16, the image data is decompressed and decompressed. Next, in step S17, a map drawing process for displaying the map information together with the map information is performed based on the position information transmitted from the transmission side simultaneously with the image. The map display and the transmitted image data are synthesized and can be displayed simultaneously or selectively, and are displayed on the display device at any time corresponding to the transmission in step S18.
[0085]
When the reproduction of one unit of image data stored for an arbitrary time is completed in the stored image transmission mode, or when there is a termination command from the transmission side user including the real time mode, step S22. In this case, it is determined that the transmission is finished, and the transmission is finished and the flow is finished. If the end of step S22 is not determined, the process returns to step S13 to continue wireless transmission.
[0086]
If it is determined in step S19 that the transmission of the image has been completed on the transmission side and the wireless transmission has been completed, the flow on the reception side is also terminated. If not, the process proceeds to step S20. If it is determined that the user has forcibly terminated, a stop command is issued as a stop command, and a stop command for notifying the transmitter of the stop is transmitted wirelessly in step S21, and the process ends. The transmission side that has received the stop command determines that the transmission has ended in step S22, as in the normal end, and performs end processing. If there is no stop determination in step S20, the process is repeated from the reception of the image data in step S14 in the flow, such as when the wireless transmission is not performed all at once and is transmitted at any time with a predetermined interval. Smoothly execute reception processing and display processing as needed.
[0087]
The above is the description of the operation of the present embodiment shown in the flowchart of FIG.
[0088]
As described above, according to the present embodiment, with this configuration, it is possible to display the image data captured by the opponent vehicle on the display unit of the car navigation means of the own vehicle. At that time, the stored image data of the opponent vehicle can be searched based on the GPS information of the own vehicle, and the image data of the optimum position required from the preceding opponent vehicle can be read out, which is effective in driving guidance. Specifically, when in the stored image readout mode, it is possible to read and receive an image that was captured and stored when the preceding vehicle passed through the position where the preceding vehicle is currently located, from the preceding vehicle, so that an actual landscape image can be received. It can be displayed for guidance and is particularly effective in complicated alleys. Further, at this time, by adjusting the reception side position information based on the position information of the position where the receiving vehicle is located, it is possible to request a stored image stored at an arbitrary position from the transmission side.
[0089]
Furthermore, by obtaining real-time captured images of the preceding vehicle, it can be adapted to avoid traffic jams.
[0090]
Also, by converting the image data to be compatible with the car navigation device and display device of the partner vehicle and transmitting it, it is possible to handle even navigation devices with different methods and standards depending on the manufacturer, and is optimal for transmission By selecting an appropriate image format, smooth transmission becomes possible.
[0091]
【The invention's effect】
As described above, according to the present invention, a desired image can be transmitted and received in a system having a moving body.
[Brief description of the drawings]
FIG. 1 is a conceptual diagram showing a usage state of an embodiment.
FIG. 2 is a block diagram showing a configuration of a transmission unit of the spread spectrum communication apparatus
FIG. 3 is a block diagram showing a configuration of a receiving unit of the spread spectrum communication apparatus.
FIG. 4 is a block diagram illustrating a configuration of a main part of the embodiment.
FIG. 5 is a diagram showing a mounting state of the in-vehicle camera.
FIG. 6 is a block diagram showing a configuration of a transmission unit
FIG. 7 is an explanatory diagram of object separation.
FIG. 8 is an explanatory diagram of encoding by MPEG4.
FIG. 9 is an explanatory diagram of decoding by MPEG4.
FIG. 10 is a conceptual diagram of a storage form.
FIG. 11 is a block diagram showing a configuration of a receiving unit
FIG. 12 is a diagram showing a display example on the receiving side
FIG. 13 is a flowchart showing the operation of the embodiment.
FIG. 14 is a block diagram showing the configuration of a conventional car navigation device
[Explanation of symbols]
1 System controller
6 GPS unit
7 In-vehicle camera
16 Display device
19 Wireless transceiver

Claims (2)

A mobile inter-communication system configured to include a movable receiving device and a transmitting device,
The receiving device is:
First position detecting means for detecting the position of the device itself;
First request information for reproducing and transmitting recorded image information in accordance with position information based on the position detected by the first position detecting unit to the transmission apparatus, and real-time at the position of the transmission apparatus Request generating means for generating second request information for transmitting image information ;
Wherein transmitting the first request information and the second request information that will be generated by the request generating means to selectively said transmission device, and a communication means for receiving image information transmitted from the transmitting device,
The transmitter is
Imaging means for capturing a subject image and generating image information;
Second position detecting means for detecting the position of the own device;
A recording unit that adds information on a position at the time of imaging detected by the second position detection unit to the image information generated by the imaging unit, and records the information on a recording medium connected to the imaging unit ;
Receiving means for receiving the first request information and the second request information transmitted from the receiving device;
Reproducing means for retrieving and reproducing recorded image information recorded on the recording medium based on position information included in the first request information when the receiving means receives the first request information. When,
When the first request information is received by the receiving means, image information reproduced by the reproducing means is transmitted to the receiving device, and when the second request information is received, the imaging is performed. Transmitting means for transmitting real-time image information generated by the means to the receiving device;
A communication system between mobile units, comprising: A portable telecommunications apparatus having a function as an image transmission apparatus,
Imaging means for capturing a subject image and generating image information;
Position detecting means for detecting the position of the device itself;
A recording unit that adds information on a position at the time of imaging detected by the position detection unit to the image information generated by the imaging unit and records the information on a recording medium connected to the imaging unit ;
Receiving means for receiving first request information for requesting recorded image information and second request information for requesting real-time image information from an external receiving device ;
Reproducing means for retrieving and reproducing recorded image information recorded on the recording medium based on position information included in the first request information when the receiving means receives the first request information. When,
When the first request information is received by the receiving means, image information reproduced by the reproducing means is transmitted to the receiving device, and when the second request information is received, the imaging is performed. Transmitting means for transmitting real-time image information generated by the means to the receiving device;
Communication device you comprising: a.

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