JP2009284379A - Communication system - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an adaptor for video-audio transmission/reception which transmits and receives large-capacity video data and audio signal data in real time between two portable terminals. <P>SOLUTION: A first video-audio transmission/reception adaptor analog-digital converts large-capacity video data signal and audio data signal received from a transmission mobile terminal, compresses them and so on and transmits them to a first wireless communication module. The first wireless communication module encodes, modulates and packetizes the received large-capacity video data signal and audio data signal, and then transmits the packet signal to a second wireless communication module in real time via a next generation high-speed wireless communication line and a network. The second wireless communication module demodulates and decodes the received large-capacity video data signal and audio data signal, and transmits them to a second video-audio transmission/reception adaptor. The second video-audio transmission/reception adaptor decodes and expands the received large-capacity video data signal and audio data signal and then transmits them to a destination mobile terminal. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention provides a communication function by inserting a wireless communication module, thereby transmitting and receiving voice and moving image data signals between mobile terminals via a network such as a next-generation high-speed wireless communication line and the Internet. More specifically, the present invention relates to a communication system in which large-capacity moving image data and audio data signals are transmitted and received in real time using a video / audio transmission / reception adapter that can be used. Connected to a mobile terminal such as a portable TV on the reception side, and transmission and reception of large-capacity image and audio data signals between the mobile terminal on the transmission side and the mobile terminal on the reception side via a network such as the Internet Send and receive large-capacity moving image data and audio data signals in real time using a video / audio transmission / reception adapter It relates to a communication system that was.

  FIG. 5 is a diagram showing a conventional system 100 for transmitting and receiving a data signal composed of a large-capacity moving image and audio data via a high-speed communication line and a network such as the Internet. The user uses the portable video camera 102 to record, for example, a moving image of an athletic meet. The user takes the portable video camera 102 home, and connects the portable video camera 102 to a dedicated interface device 104 in order to transmit the recorded large-capacity moving image and audio data. The interface device 104 generally includes a personal computer, a moving image / audio interface (such as a capture board), and a moving image format conversion S / W or H / W. The interface device 104 performs processing such as pre-emphasis (high frequency emphasis) on the large volume moving image and audio data, converts the large volume moving image and audio data from analog data to digital data, and performs compression processing. , Encoded, modulated, packetized, and sent to the destination interface device 112 via the high-speed communication line 106, the network 108 such as the Internet, and the high-speed communication line 110. The interface device 112 demodulates, decodes, decodes, and expands the received data signal, converts the digital data into analog data, de-emphasizes it, and sends it to the destination portable television 114.

  In order to execute the above operation, the interface device 104 converts analog data into a format such as AVI (Audio Video Interleaving) / MPEG (Moving Picture Expert Group) / WMV (Windows (registered trademark) Media Video) / SFW / DIVX. The data must be compressed and the encoded data must be uploaded to the Internet via a high-speed communication line such as ADSL or an optical line. The interface device 112 on the destination side must download the uploaded data via a high-speed communication line such as ADSL or an optical line, and decode it into analog data that can be handled by the portable television 114.

  In order for the interface device 104 to convert analog data to AVI format digital data, compress the moving image data with the DVIX codec using MPEG-4, and encode the data compressed with MPEG-4 with WMV, It is necessary to prepare an interface device composed of an audio interface (such as a capture board), a personal computer equipped with S / W or H / W for video compression and encoding. In addition, in order to upload encoded data to the Internet via a high-speed communication line such as ADSL or an optical line, the interface device 104 must be positioned where ADSL or an optical line can be used. Similarly, in order to download uploaded data via a high-speed communication line such as ADSL or an optical line, the interface device 112 must be located where ADSL or an optical line can be used. Furthermore, in order to decode into analog data that can be handled by the portable television 114, as described above, a personal computer equipped with a video / audio interface (such as a capture board), S / W or H / W for video compression and encoding. An interface device composed of a computer must be prepared.

  Video / audio interface (capture board, etc.) can be connected to a personal computer, etc., S / W for video compression and encoding can be installed or H / W can be connected, and it can be connected to a high-speed communication line and used as an interface device To set the state, a complicated setting operation is required, and only an expert or a mania can perform it. In regions far from urban areas, high-speed communication lines such as ADSL and optical lines are often not available. Further, in general, the interface devices 104 and 112 require a power source, are often large and difficult to move, and the interface devices 104 and 112 are expensive. Therefore, in places where it is difficult to connect to a power supply or high-speed communication line, such as athletic meet venues held in schoolyards or plazas, recorded large-capacity moving images and audio data can be transmitted on the spot in real time. Therefore, for example, it is difficult to view in real time via the network 108 the video and the audio reproduced by the portable video camera 102, which are images of the contents of the athletic meet.

  In order to achieve the above object, a communication system according to the present invention is a communication that transmits and receives large-capacity moving image data and audio data signals in real time between a source mobile terminal and a destination mobile terminal via a network such as the Internet. The system is a first video / audio transmission / reception adapter detachably connected to the transmission side mobile terminal and communicably connected to the transmission side mobile terminal, and is detachably inserted into the first video / audio transmission / reception adapter, A first wireless communication module electrically connected to the first video / audio transmission / reception adapter, and a second video / audio transmission / reception adapter detachably connected to the destination mobile terminal and communicably connected to the destination mobile terminal And a second wireless communication module that is detachably inserted into the second video / audio transmission / reception adapter and electrically connected to the second video / audio transmission / reception adapter. The first video / audio transmission / reception adapter performs analog-to-digital conversion, compression, encoding, and transmission to the first wireless communication module of large-capacity moving image data and audio data signals received from the originating mobile terminal, The first wireless communication module encodes, modulates, and packetizes large-capacity moving image data and audio data signals received from the first video / audio transmission / reception adapter via a next-generation high-speed wireless communication line and network. To the second wireless communication module in real time, and the second wireless communication module demodulates and decodes the received large-capacity moving image data and audio data signal to the second video / audio transmission / reception adapter. The second video / audio transmission / reception adapter decodes the large-capacity moving image data and audio data signal received from the second wireless communication module, Zhang, digital - to analog converter, a communication system for transmitting to the destination mobile terminal.

  With the above-described configuration, encoding and decoding can be realized by the single video / audio transmission / reception adapter according to the present invention. In addition, regardless of whether the mobile terminal is located where ADSL or an optical line can be used, large-capacity moving image data and audio signal data can be uploaded and downloaded in real time regardless of where it is located. Is possible.

  The present invention provides a communication function by inserting a wireless communication module, thereby transmitting and receiving voice and moving image data signals between mobile terminals via a network such as a next-generation high-speed wireless communication line and the Internet. It relates to a video / audio transmission / reception adapter that can be used.

  FIG. 1 is a diagram showing a wireless communication system 200 of the present invention. The portable video camera 102 is connected to the video / audio receiving adapter 202 of the present invention. The video / audio transmission / reception adapter 202 performs processing such as pre-emphasis on the large-capacity moving image and audio data, converts the large-capacity moving image and audio data from analog data to digital data, performs compression processing, An integrated circuit for encoding is provided. A wireless communication module 204 is inserted into the video / audio transmission / reception adapter 202. The wireless communication module 204 receives from the video / audio transmission / reception adapter a large-capacity moving image and audio data that have been subjected to processing such as pre-emphasis, analog-digital conversion, compression processing, and encoding processing. The wireless communication module 204 includes an integrated circuit that encodes, modulates, and packetizes the received large-capacity moving image and audio data, an antenna for transmission / reception, and the like.

  The wireless communication module 204 inserted into the video / audio transmission / reception adapter 202 transmits the large-capacity moving image and audio data packetized via the next-generation high-speed wireless communication line 206 to the network 108 such as the Internet in real time.

  The destination portable television 114 is connected to a video / audio transmission / reception adapter 210, and a wireless communication module 212 is inserted into the video / audio transmission / reception adapter 210. The wireless communication module 212 includes an integrated circuit that demodulates and decodes the received large-capacity moving image and audio data. The video / audio transmission / reception adapter 210 includes an integrated circuit that decodes a large-capacity moving image and audio data that have been decoded, decompresses them, performs digital-analog conversion, and performs de-emphasis processing. The video / audio transmission / reception adapters 202 and 210 have the same configuration. Therefore, both the video / audio transmission / reception adapters 202 and 210 perform processing such as pre-emphasis on large-capacity moving image and audio data, and then convert the large-capacity moving image and audio data from analog data to digital data. An integrated circuit that performs compression processing and performs encryption, and an integrated circuit that performs decryption, decompression, digital-analog conversion, and de-emphasis processing on the decrypted large-capacity moving image and audio data. I have. The wireless communication modules 204 and 212 have the same configuration. Therefore, the wireless communication modules 204 and 212 both encode and modulate the received large-capacity moving image and audio data, modulate and packetize, and demodulate and decode the received large-capacity moving image and audio data. An integrated circuit and a transmission / reception antenna.

  The packetized large-capacity moving image and audio data sent to the network 108 such as the Internet is transmitted to the destination wireless communication module 212 via the next-generation high-speed wireless communication line 208. The wireless communication module 212 demodulates and decodes the received large-capacity moving image and audio data, and sends them to the video / audio transmission / reception adapter 210. The video / audio transmission / reception adapter 210 performs the de-emphasis processing on the decoded large-capacity moving image and audio data that have been flattened, expanded, digital-analog converted, and sent to the portable television 114.

  FIG. 2 is a diagram showing the external appearance of the wireless communication module 204. The wireless communication module 204 includes, for example, a voice PIN, a control PIN, a field strength PIN, a power supply PIN, an I / F switching PIN, and the like. By inputting and outputting control commands to these PINs, video and audio signals are transmitted and received. The wireless communication module 212 has the same configuration. Hereinafter, the wireless communication module 204 will be described as an example.

  FIG. 3 is a diagram showing a frame structure of a large-capacity moving image and audio data transmitted and received by the communication system of the present invention. The large-capacity moving image and audio data to be transmitted / received includes a start bit 402 and a stop bit 404, and a data portion 406 between the start bit 402 and the stop bit 404. The data portion 406 includes an audio portion 408, an image portion 410, and a portion 412 on which information such as electric field strength is placed.

  FIG. 4 is a functional block diagram of the wireless communication module 204. A wireless communication module (W-SIM) is a device in which a wireless communication part is removed from a conventional mobile communication terminal (for example, a PCM codec, a control unit, a microphone, a speaker, an input device, a display, a battery, etc., and necessary software) Etc.), which is inserted into a corresponding slot of a device (jacket or base unit) corresponding to the wireless communication module 204. By utilizing a compact wireless communication module, manufacturers developing communication devices are freed from the burden of developing wireless communication-related parts and can concentrate on developing software, etc. ) Can be focused on higher functionality.

  The wireless communication module 204 includes a control unit 502, an antenna 504, an antenna switch 506 for switching transmission / reception signals at the antenna 504, a transmission unit 508, a reception unit 510, a modulation unit 512, a demodulation unit 514, A multiple access encoding unit 516, a multiple access decoding unit 518, an ADPCM (adaptive differential pulse code modulation) transcoder 520, a flash memory 522, a random access memory (RAM) 524, and a power source 526 are included.

The video / audio transmission / reception adapter 202 and the wireless communication module 204 are connected via an interface unit 528. The interface unit 528 includes 18 pins (signal lines). Seven of these pins, as a UART (Universal Asynchronous Receiver Transmitter) serial interface, are used to transmit control data and data during data communication.Transmit serial data (TXD), receive serial data (RXD), and transmit data Used for ready (RTS), transmit ready (CTS), receive ready (DTR), data carrier detection (DCD), ring indicator (RI). The other four pins are used to exchange audio signals such as PCM clock signal (PCMCLK), PCM synchronization signal (PCMSYNC), PCM input signal (PCMIN), and PCM output signal (PCMOUT). The The other one pin is used to recognize the insertion of the wireless communication module using the detection signal (INS). The other three pins are used for two signals of power supply (V _cc ) and ground (GND) for power supply and ground to the wireless communication module. The remaining three pins are used to display the field strength (antenna display) on the external display device such as LCD and LED of the video / audio transmission / reception adapter 202 to transmit / receive each signal for field strength. The interface notification signal (IF_SEL) is used to check whether the pin currently used in the UART can be used in another data transfer method other than the UART. Is done.

  The flash memory 522 has an address table in which destination addresses are stored. When receiving a trigger signal from a control unit (not shown) of the video / audio transmission / reception adapter 202, the control unit 502 searches the address table of the flash memory 522. The control unit 502 acquires the destination address from the address table of the flash memory 522 and sends it to the multiple access encoding unit 516.

  Multiple access encoding section 516 transmits data to a base station by a plurality of portable terminals such as a plurality of portable video cameras 102 in a cell which is a communication area which is a basic unit in mobile communication. At this time, encoding is performed for efficient multiplexing and communication in an environment where wireless communication is performed in the uplink from the mobile terminal to the base station. The multiple access encoding unit 516 uses time division multiple access (Time Divisional Multiple Access), frequency division multiplexing (Code Divisional Multiple Access), and code division multiple access (Code Divisional Multiple Access) to multiplex data using time slots. ) Or an orthogonal frequency division multiplexing (Orthogonal Frequency Divisional Multiplexing) method.

  The data encoded by the multiple access encoding unit 516 is modulated by a modulation method in the modulation unit 512 using a known modulation method, converted into a 1.9 GHz band modulated wave by a bandpass filter (not shown) of the transmission unit 508, and the antenna switch 506 and Wireless transmission is performed via the antenna 504 to the network 108 such as the Internet.

  The video / audio transmission / reception adapter 202 can transmit the large-capacity moving image data and the audio data signal including the position information of the video / audio transmission / reception adapter 202. The control unit 502 of the wireless communication module 204 controls the wireless communication module 204 so as to transmit an audio data signal and a position information signal covering large-capacity moving image data from the antenna 504. Location information can be obtained from at least three base stations in which the wireless communication module 204 is located within their coverage at predetermined time intervals. Specifically, each base station holds position information such as longitude and latitude information, and if it is possible to obtain distances from at least three base stations, a method similar to triangulation method is used. The position of the video / audio transmission / reception adapter 202 can be specified. The distances from at least three base stations can be obtained by detecting the electric field strength of radio waves received by the video / audio transmission / reception adapter 202.

  Audio data and moving image data sent from the portable video camera 102 to the video / audio transmission / reception adapter 202 are AVI (Audio Video Interleaving) / MPEG (Moving Picture Expert Group) / WMV (Windows (registered trademark) Media Video). / SFW / DIVX and other compression formats. After that, the moving image data sent to the video / audio transmission / reception adapter 202 is filtered by a band-pass filter (not shown), and is used for TXD, RXD, RTS, CTS, DTR, DCD, RI. It is sent to the control unit 502 of the wireless communication module 204 via the pins.

  Error data from the voice data of ADPCM transcoder 520 is sent to multiple access coding section 516. Also, the image data compressed and encoded by the video / audio transmission / reception adapter 202 is also sent from the control unit 502 to the multiple access encoding unit 516. In the multiple access encoding unit, combining means (not shown) generates a data frame 400 that combines audio data and image data. The audio signal and the image signal can be synchronized by a known method using the start bit 402 and the stop bit 404.

  The data encoded by the multiple access encoding unit 516 is modulated by the modulation unit 512 by a known modulation method and wirelessly transmitted to the network 108 via the transmission unit 508, the antenna switch 506, and the antenna 504. Regardless of the amplitude modulation (Amplitude Shift Keying (ASK)), frequency modulation (Frequency Shift Keying (FSK)), phase modulation (BPSK, QPSK, 8PSK, etc.) It may be.

  On the other hand, large-capacity moving image data and audio data signals transmitted from the network 108 are received by the antenna 504 and sent to the receiving unit 510 via the antenna switch 504. The received signal is amplified and bandpass filtered by the receiving unit 510, demodulated into a baseband signal by the demodulating unit 514, and then decoded by the decoding unit 518 into an ADPCM audio signal or a digital moving image data signal. The ADPCM audio signal is sent to the ADPCM transcoder 520 and converted into a PCM audio signal. The PCM audio signal is sent to the video / audio transmission / reception adapter 202 via the audio signal pin of the interface unit 528, converted into an analog signal, and output via the portable TV 114 or the portable video camera 102. The On the other hand, a data signal such as a moving image sent from the decoding unit 518 to the control unit 502 is sent to the video / audio transmission / reception adapter 202 via the UART pin of the interface unit 528, and in response to a user request It is displayed via the display of the portable television 114 or the portable video camera 102.

  Communication between the video / audio transmission / reception adapter 202 and a base station (not shown) may be performed via a network conforming to the third generation (3GPP (third generation partnership project)) standard, 3.5G (so-called It may be performed via a HSDPA (High Speed Downlink Packet Access) network compliant with the beyond3G) standard. It may be performed via a network based on the 4G standard using a variable spreading factor orthogonal frequency code division multiplexing (VSF-OFCDM (Variable Spreading Factor-Orthogonal Frequency and Code Division Multiplexing)) method.

Furthermore, the video / audio transmission / reception adapter 202 of the present embodiment provides a function for checking whether or not the wireless communication module 204 is inserted in the video / audio transmission / reception adapter 202. Specifically, one of the 18 pins “INS” of the interface unit 528 is used as a signal line for insertion / removal confirmation. The voltage on the signal line when the wireless communication module 204 is not inserted into the video / audio transmission / reception adapter 202 is different from the voltage on the signal line when the wireless communication module 204 is inserted into the video / audio transmission / reception adapter 202. By configuring so as to be a value, the video / audio transmission / reception adapter 202 can detect the current insertion / removal state. Based on the detection result, the video / audio transmission / reception adapter 202 displays an insertion / extraction state using LDE or the like, and informs the user whether or not the wireless communication module 204 is inserted. When the wireless communication module 204 is completely inserted into the wireless communication module insertion portion 306 and the wireless communication module insertion portion 306 of the video / audio transmission / reception adapter 202 is closed, whether or not the wireless communication module 204 is inserted from the outside Is not visible. Thereby, even if the wireless communication module 204 is not inserted, the user immediately notices the absence of the wireless communication module 204.
In the above embodiment, the wireless communication modules 204 and 212 are used. However, the present invention is not limited to this, and the wireless communication function configuration of the wireless communication modules 204 and 212 is the same as that of the video / audio transmission / reception adapters 202 and 210. It may be in a form completely embedded in

[effect]
As described above, it is possible to realize analog-to-digital conversion and digital-to-analog conversion including compression, coding, modulation, packetization, decoding, and decompression with the video / audio transmission / reception adapter alone of the present invention. Become. In addition, regardless of whether the mobile terminal is located where ADSL or an optical line can be used, large-capacity moving image data and audio signal data can be uploaded and downloaded in real time regardless of where it is located. Is possible.

It is a figure which shows the radio | wireless communications system of this invention. It is a figure which shows the external appearance of a wireless communication module. It is a figure which shows the frame structure of the large capacity | capacitance moving image and audio | voice data transmitted / received by the communication system of this invention. It is a functional block diagram of a wireless communication module. It is a figure which shows the conventional system for transmitting / receiving the data signal which consists of a high capacity | capacitance moving image and audio | voice data via networks, such as a high-speed communication line and the internet.

Claims (1)

A communication system that transmits and receives large-capacity moving image data and audio data signals in real time between a source mobile terminal and a destination mobile terminal via a network such as the Internet,
A first video / audio transmission / reception adapter detachably connected to the caller mobile terminal and communicably connected to the caller mobile terminal;
A first wireless communication module detachably inserted into the first video / audio transmission / reception adapter and electrically connected to the first video / audio transmission / reception adapter;
A second video / audio transmission / reception adapter detachably connected to the destination mobile terminal and communicably connected to the destination mobile terminal;
A second wireless communication module that is detachably inserted into the second video / audio transmission / reception adapter and electrically connected to the second video / audio transmission / reception adapter;
The first video / audio transmission / reception adapter performs analog-to-digital conversion, compression, and encoding on the large-capacity moving image data and the audio data signal received from the originating mobile terminal, and the first wireless communication module. The first wireless communication module encodes, modulates, and packetizes the large-capacity moving image data and the audio data signal received from the first video / audio transmission / reception adapter for next-generation high-speed wireless communication Transmitting to the second wireless communication module in real time via the line and the network, and the second wireless communication module demodulates and decodes the received large volume moving image data and audio data signal, and The second video / audio transmission / reception adapter receives the large-capacity moving image data received from the second wireless communication module. Communication system to analog conversion, and transmits to the destination mobile terminal - decodes the data and audio data signals, decompresses digital.

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