JP2010124108A - Video/audio data transmitter - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To display setting, a reception state, or video and audio on an operation panel screen of a transmitter. <P>SOLUTION: The transmitter of a system which carries out the wireless transmission of signals of video, audio, data or the like while being modulated by a digital modulation system constituted of structural unit periods has a setting information detection means, a state information detection means, a temperature detection means, an image generation means, and an image display means wherein at least two of the video, audio, setting information, state information and a temperature in the transmitter are imaged by the image generation means and superimposed, and then the image is displayed by the image display means. The receiver has a reception state information generation means, a setting information detection means, a state information detection means, a temperature detection means, an image generation means, and an image display means wherein the reception state information is imaged by the image generation means and at least two of the video, audio, setting information, state information and the temperature in the transmitter are imaged by the image generation means and superimposed on the reception state information, and then the image is displayed by the image display means. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a transmission apparatus of a transmission system that transmits a video signal, an audio signal, or data modulated by a digital modulation method configured in a unit period.

  In recent years, orthogonal frequency division multiplexing (OFDM) modulation scheme (hereinafter referred to as OFDM scheme) and phase amplitude modulation (Quadrature Amplitude Modulation) scheme (hereinafter referred to as QAM scheme) have been adopted for terrestrial digital broadcasting and the like. . The modulation signal of terrestrial digital broadcasting is composed of constituent unit periods.

  In a receiving apparatus of a transmission apparatus that transmits an OFDM signal including a guard period, a correlation calculation is performed in the guard period of the received OFDM signal, and a direction adjustment signal of the receiving antenna is obtained based on the guard correlation signal obtained as a result of the correlation calculation Is generated, and the level of the received signal is detected and the direction of the receiving antenna is adjusted even in the initial stage of the direction adjustment of the receiving antenna where C / N is about 0 dB or less (see Patent Document 1).

  In an FPU remote control system having a transmission device that transmits a video signal, a reception device that receives the transmitted signal with a reception antenna, and a control device that remotely controls the reception direction of the reception antenna, A vertical section corresponding to the vertical angle line of the receiving antenna and a horizontal angle of the receiving antenna is displayed, and a vertical sectional view corresponding to the horizontal angle of the receiving antenna corresponding to the changed receiving direction is displayed when the receiving direction of the receiving antenna is changed. However, the reception direction display method of the reception antenna in the FPU remote control system that can easily confirm the radio wave propagation shielding zone while adjusting the direction has been performed (see Patent Document 2).

  HD-SDI (High Definition-Serial Digital Interface) signal is a serial digital video signal standard defined by the SMPTE292M recommendation. AES3-1992 signal commonly known as AES / EBU (Audio Engineering Society / European Broadcasting Union) signal is The basic multiplexing conditions for transmitting the commercial 2-channel digital audio interface specified by AES in ARIB BTA S-006 in the auxiliary signal area using the HD video blanking period are unified. AES audio is all data constituting one AES digital stream, and consists of audio data and additional data.

  In television broadcasting, a portable relay device called FPU (Field Pickup Unit) or a transmission device called TSL (Transmitter Studio Link) is used to transmit a television signal from a broadcasting site to a broadcasting station such as news reports and marathon relays. Is used. A signal from the FPU is received by an FPU base station installed at a mountaintop or the like, and is generally transmitted from a FPU base station to a broadcast station using a fixed line called a TSL device. The FPU is generally composed of a transmission control unit, a transmission high-frequency unit, a reception control unit, and a reception high-frequency unit, and an integrated transmission unit in which the transmission control unit and the transmission high-frequency unit are integrated and downsized is also used. .

FIG. 5 of a block diagram showing a configuration example of a transmission system of the prior art, and FIG. 6 of a block diagram showing configurations of a transmission control unit and a reception control unit of the prior art, for a transmission device of the prior art,
Description will be made with reference to FIG. 7 of a schematic diagram showing a front operation panel of a reception control unit of the prior art, and FIGS. 8A and 8B of schematic diagrams showing a display unit surface of the prior art.

  In FIG. 5 of the block diagram showing an example of the configuration of the transmission system of the prior art, the transmission side device includes a transmission control unit 601, a transmission high frequency unit 801, and an antenna 505, and the reception side device includes an antenna 506 and a reception high frequency unit 901. And a reception control unit 701. The transmission control unit 601 modulates a video signal and an audio signal, which are input signals, by a modulation unit 507 according to a predetermined modulation mode such as an OFDM-64QAM system set by the operation unit 102, and a 70 MHz or 130 MHz IF ( The frequency is converted to the Intermediate Frequency band. The transmission high-frequency unit 801 converts the IF signal to an RF signal having a predetermined frequency of 800 MHz or more set by the operation unit 102 or the operation unit 302 after performing automatic level adjustment (Auto Gain Control: AGC) on the IF signal by the up-converter 509, The power is amplified to a predetermined level set by the operation unit 102 or the operation unit 302 by the amplifier 510 and transmitted from the antenna 505. The reception high-frequency unit 901 receives an RF (Radio Frequency) signal with the antenna 506, performs low-noise amplification with an LNA (Low Noise Amp) 511, automatically adjusts the level, and converts it to an IF signal with the down converter 512. Then, the reception control unit 701 automatically adjusts the level of the IF signal by the down converter 513, converts the frequency, and the video signal and the audio signal obtained by demodulating the IF signal in a predetermined demodulation mode such as OFDM-64QAM system by the demodulation unit 514 Is output. The transmission control unit 601, the transmission high frequency unit 801, the reception high frequency unit 901, and the reception control unit 701 are controlled and detected by the CPUs 605, 805, 905, and 705 with clocks, and the display units 603, 703, 803, and 903 and the level meter 604, 704, 804, and 904. The display unit 603 of the transmission control unit 601 has, for example, a transmission bit rate, a modulation method, and a channel to be used. The display unit 703 of the reception control unit 701 has, for example, a transmission bit rate, a demodulation method, and a channel to be used. Is displayed. The audio signal is often multiplexed during the blanking period of the serial digital video signal.

  Here, the detailed operation of the control unit will be described with reference to FIG. 6 of the block diagram showing the configurations of the transmission control unit and the reception control unit of the prior art.

  In FIG. 6 of the block diagram showing the configuration of the transmission control unit and the reception control unit of the prior art, the modulation unit 507 of the transmission control unit 601 compresses the video signal and the audio signal by MPEG2 (Moving Picture Experts Group) etc. A video encoding unit that converts the signal into a stream signal, a channel encoding unit that performs modulation, error correction, and the like, and an orthogonal modulation unit. The channel encoding unit is for preventing data errors due to errors during transmission, and appropriately performs processing such as energy spreading, convolutional encoding, and interleaving. The orthogonal modulation unit obtains a QAM or OFDM modulated wave signal. This modulated wave signal is frequency-converted to an IF band of 70 MHz or 130 MHz by the up-converter 508 and sent to the transmission high-frequency unit.

  The clocked CPU 605 selects, for example, a video / audio signal to be transmitted, and performs video signal / audio signal format selection, TS signal transmission rate setting, and the like to the video encoding unit. Also, error information from the modulation unit 507 is received. For example, signal format error information set from the video encoding unit is received. Such error information is stored in the memory of the CPU 605 with a clock.

  On the other hand, the reception control unit 701 receives an IF signal of 70 MHz or 130 MHz, performs automatic level adjustment and frequency conversion by the down converter 513, demodulates by the orthogonal demodulation unit in the demodulation unit 514, and deinterleaves and viterbi by the communication path decoding unit. The TS signal is reproduced by performing decoding or the like, and the video signal and the audio signal are decoded by the video decoding unit.

  Also, reception state information such as reception field strength, presence / absence of interference wave, and bit error rate is output from the demodulation unit 514, and is converted into a video signal and output by the reception state information generation unit 207.

  In addition, the display units 603 and 703 of the transmission control unit and the reception control unit receive the character code or bitmap information from the CPU, thereby reading and displaying the setting information of the transmission apparatus or the error information received from the modulation unit from the memory.

  In FIG. 7, which is a schematic diagram showing an operation panel of a conventional reception control unit, an operation unit 702 includes a power switch, a channel switch, a modem switch, a preset switch, and the like. The frequency channel switch sets a frequency channel to be transmitted, the modulation / demodulation switch sets a modulation method such as QAM and OFDM, and the preset switch presets a signal format such as video and audio to be transmitted and a transmission rate setting.

  A display unit 703 displays setting information from the operation unit 702 and error information of the transmission apparatus.

  FIG. 8 is a schematic diagram showing a display section surface of the prior art, and FIG. 8A is a display section screen for setting display, which displays channel, modulation system, and signal format device settings. (B) is a display part of an error display, which displays the occurrence time and the device error information of the error content.

In addition, a switch for channel setting, transmission output switching setting, modulation method setting, transmission rate setting, codec setting, etc. is provided on the operation panel on the front panel of the transmission control unit. Send it out. At this time, if any alarm / abnormality is detected inside the device, a warning LED (Light Emitting Diode) displays a warning. Moreover, the details are also displayed on a display part (refer patent document 3).
JP 2003-115787 A JP 2005-73007 A JP 2006-254130 A

  By the way, the above-mentioned display section displays device setting information and error monitoring logs. When monitoring the video signal to be transmitted or monitoring the reception status information, a video monitor is prepared separately from the transmission device. There was a need to monitor. Further, since the display surface is information by characters, for example, the error information display surface has a short amount of information, and it may be difficult to analyze the situation.

  In addition, when monitoring a video signal to be transmitted or monitoring reception status information, it is necessary to prepare and monitor a video monitor separately from the transmission device.

  It is an object of the present invention to eliminate these drawbacks and to provide an apparatus that can easily perform mobile relay transmission even in an unstable environment.

  In order to achieve the above object, the present invention provides a transmission apparatus for a system for wirelessly transmitting a signal such as video, audio, data, etc. by a digital modulation method configured in a unit period, in a setting information detecting means and a state An information detection unit, a temperature detection unit, an image generation unit, and an image display unit, and at least two of the video, the audio, the setting information, the status information, and the temperature in the transmission apparatus are imaged by the image generation unit. A transmission apparatus that superimposes and displays an image on the image display means.

  In addition, in a transmission apparatus for a system that wirelessly transmits a signal such as video, audio, data, etc. by a digital modulation method configured by a unit period, a reception state information creating unit, a setting information detecting unit, and a state information detecting unit And the temperature detection means, the image generation means, and the image display means, the reception status information is imaged by the image generation means, and at least the video, the audio, the setting information, the status information, and the temperature in the transmission apparatus The transmission apparatus is characterized in that one is imaged by the image generation means and is superimposed on the reception status information and displayed on the image display means.

  In the above transmission apparatus, the modulation system is an orthogonal frequency division multiplexing (OFDM) system or a quadrature amplitude modulation (QAM) system.

  As described above, according to the transmission apparatus according to the present invention, it is possible to provide a display screen with a large amount of information by image display, and mobile relay transmission can be facilitated.

  FIG. 1 is a block diagram illustrating a transmission system using the transmission apparatus according to the embodiment of the present invention, and the transmission control unit and the reception control unit according to the embodiment of the present invention. 2 of the block diagram showing the configuration, FIG. 3 of the schematic diagram showing the front operation panel of the reception control unit of one embodiment of the present invention, and the schematic diagram showing the image of the image display unit of one embodiment of the present invention This will be described with reference to FIG. 4A and FIG. 4B, which is a schematic diagram showing an image of the image display unit of one embodiment of the present invention.

  In the transmission apparatus of this embodiment, in the case of the transmission side apparatus, the OFDM set by operating various setting switches of the operation unit 102 of the transmission control unit 501 in FIG. 1 of the block diagram showing the configuration example of the transmission system. Modulation is performed by a modulation unit 507 according to a predetermined modulation method / transmission parameter such as -64QAM method, and frequency conversion is performed by an up-converter 508 to a 70 MHz or 130 MHz IF (Intermediate Frequency) band. The transmission high-frequency unit 502 converts the IF signal to an RF signal having a predetermined frequency of 800 MHz or higher set by the operation unit 102 or the operation unit 302 after performing automatic level adjustment (Auto Gain Control: AGC) of the IF signal by the up-converter 509, The power is amplified to a predetermined level set by the operation unit 102 or the operation unit 302 by the amplifier 510 and transmitted from the antenna 505. The reception high-frequency unit 503 receives an RF (Radio Frequency) signal by the antenna 506, performs low-noise amplification by an LNA (Low Noise Amp) 511, automatically adjusts the level, and converts it to an IF signal by the down converter 512. Then, the reception control unit 504 obtains the IF signal by performing automatic level adjustment and frequency conversion by the down converter 513 and demodulating by the demodulation unit 514 in a predetermined demodulation mode such as the OFDM-64QAM system set by the operation unit 202. The received video signal and audio signal are output. The transmission controller 601, the transmission high-frequency unit 801, the reception high-frequency unit 901, and the reception control unit 701 are the temperature sensors 106, 306, 406, 206 for observing the CPUs with clocks 105, 305, 405, 205 and the internal temperature. The state is detected and controlled, and displayed on the image display units 103 and 203 and the leveled display units 303 and 403. The display unit 103 with level of the transmission control unit 501 has, for example, a transmission bit rate, a modulation method, and a channel to be used. The display unit with level 203 of the reception control unit 504 has, for example, a transmission bit rate, a demodulation method. , Display the channel to be used.

  Here, the detailed operation of the control unit will be described with reference to FIG. 2 of the block diagram showing the configuration of the transmission control unit and the reception control unit of one embodiment of the present invention.

  2 of the block diagram showing the configuration of the transmission control unit and the reception control unit of one embodiment of the present invention, the modulation unit 507 of the transmission control unit 501 is MPEG2 (Moving Picture Experts Group) or H.264. H.264, JPEG-LS (Joint Photographic Experts Group Loss Less), etc., a video encoding unit that compresses video signals and audio signals and converts them into TS (Transport Stream) signals, and a channel encoding unit that performs modulation, error correction, etc. Consists of an orthogonal modulation unit. The channel encoding unit is for preventing data errors due to errors during transmission, and appropriately performs processing such as energy spreading, convolutional encoding, and interleaving. The orthogonal modulation unit obtains a QAM or OFDM modulated wave signal. This modulated wave signal is frequency-converted to an IF band of 70 MHz or 130 MHz by the up-converter 508 and sent to the transmission high-frequency unit.

  The clocked CPUI 105 selects, for example, a video / audio signal to be transmitted, and performs video signal / audio signal format selection, TS signal transmission rate setting, and the like to the video encoding unit. Also, error information from the modulation unit 507 is received. For example, signal format error information set from the video encoding unit is received. These pieces of error information are stored in the memory of the CPU with clock 105.

  On the other hand, the reception control unit 201 receives the IF signal of 70 MHz or 130 MHz, performs automatic level adjustment and frequency conversion by the down converter 513, demodulates by the quadrature demodulation unit in the demodulation unit 514, and deinterleaves and viterbi by the channel decoding unit. The TS signal is reproduced by performing decoding or the like, and the video signal and the audio signal are decoded by the video decoding unit.

  Also, reception state information such as reception field strength, presence / absence of interference wave, and bit error rate is output from the demodulation unit 514, converted into a video signal by the reception state information generation unit 207, and output as a reception state information signal.

  In addition, the image generation unit 104 of the transmission control unit converts the input video and audio into an image, reads out the setting information of the transmission device or the error information of the modulation unit 507 from the memory of the CPU 105 with a clock, converts the character image, and converts it into an image It is superimposed on the video and audio and displayed on the image display unit 103. Also, the reception state information creation unit with FFT 207 of the reception control unit creates and outputs a reception state information signal from the IF signal and the information of the demodulation unit 514. The image display unit 203 converts the reception state information signal and the demodulated video / audio into an image, reads the setting information of the receiving device or the error information of the demodulation unit 514 from the memory of the CPU 205 with a clock, converts the character image, and converts the image into video / audio And is displayed on the image display unit 203. The controller of the image generators 104 and 204 has a function (hereinafter referred to as OSD) for video, audio, and information image conversion, character image conversion, pixel number conversion, and superimposition display for image display on the image display units 103 and 204. The necessary processing is performed. A memory is connected to the controller and stores video, audio, images, and data.

  FIG. 2 of the block diagram showing the configuration of the transmission control unit and the reception control unit of one embodiment of the present invention and the time series of the reception status information and the error information with respect to the function of converting the character data and video data described above and superimposing them. (A) A display image example of a receiver that simultaneously displays a reception state and an error display image, reception state information, and a transmission video signal. ) A reception state, an error, and a display image of a received video will be described with reference to FIG. 4 which is a schematic diagram showing an image of an image display unit according to an embodiment of the present invention.

  Reception state information is stored in the memory in the image generation unit 204 as a video signal from the reception state information generation unit with FFT 207, and error information is read from the memory of the CPU 205 and stored in the memory in the image generation unit 204. At this time, the reception status information and the error information stored in the memory in the image generation unit 204 are changed, for example, by changing the addresses to be stored, and the storage locations are made independent. For example, by switching the data to be read out for each field, the display image of the receiver that simultaneously displays the error log that enumerates the reception status information and error information such as the reception status and error display image in chronological order in FIG. Generate. Further, by reading out the reception state information corresponding to the selected error information from the memory in the image generation unit 204, it is possible to display the video data at the time of abnormality related to the selected error information.

  Also, the reception state information generation unit 207 with FFT superimposes reception state information such as a frequency spectrum obtained by performing FFT on the constellation from the demodulation unit 514 and the input signal of the demodulation unit 514 on the demodulated video signal, and simultaneously displays the video signal. create. The simultaneous display video signal is stored in the memory in the image generation unit 204 and read to simultaneously receive the reception status, error, constellation reception status information such as a display image of the received video, and the transmission video signal. A display image of the displayed receiver is generated.

  In FIG. 3 which is a schematic diagram showing the front operation panel of the reception control unit according to the embodiment of the present invention, the operation unit 202 includes a power switch, a channel switch, a modem switch, a preset switch, and the like. The frequency channel switch sets a frequency channel to be transmitted, the modulation / demodulation switch sets a modulation method such as QAM and OFDM, and the preset switch presets a signal format such as video and audio to be transmitted and a transmission rate setting.

  Although the present invention has been described with the front operation panel in the configuration of the transmission control unit, the transmission high frequency unit, the reception control unit, and the reception high frequency unit, a front operation panel in another configuration may be used. Specifically, it is easy to confirm even with a front operation panel in an integrated transmission unit in which a transmission control unit and a transmission high-frequency unit are integrated.

The block diagram which shows the transmission system using the transmission apparatus of one Example of this invention The block diagram which shows the structure of the transmission control part of one Example of this invention, and a reception control part The schematic diagram which shows the front operation panel of the reception control part of one Example of this invention Schematic diagram showing an image of the image display unit of one embodiment of the present invention ((a) reception state and error display image, (b) reception state, error and reception video display image) Block diagram showing the configuration of a conventional transmission system The block diagram which shows the structure of the transmission control part and reception control part of a prior art Schematic diagram showing the front operation panel of the reception control unit of the prior art Schematic diagram showing the display part surface of the prior art ((a) setting display display part, (b) error display display part)

Explanation of symbols

102, 202, 302, 402, 602, 702, 802, 902: Operation unit
103, 203: Image display unit, 303, 403: Display unit with level, 104, 204: Image generation unit,
105, 205, 305, 405: CPU with clock, 106, 206, 306, 406: Temperature sensor,
207: Reception state information generation unit with FFT, 707: Reception state information generation unit
501, 601: Transmission control unit, 502, 801: Transmission high frequency unit,
503, 901: reception high-frequency unit, 504, 701: reception control unit,
505, 506: Antenna, 507: Modulator, 508, 509 upconverter, 510: Power amplifier,
511: LNA, 512, 513: Down converter, 514: Demodulator
603, 703, 803, 903: display unit, 604, 704, 804, 904: level meter,

Claims (2)

In a transmission apparatus of a system for wirelessly transmitting a signal such as video, audio, data, etc., by a digital modulation method configured by a unit period, setting information detection means, status information detection means, temperature detection means, and image generation means And image display means, and at least two of the video, the sound, the setting information, the status information, and the temperature in the transmission apparatus are imaged and superimposed by the image generation means, and an image is displayed on the image display means. A transmission apparatus characterized by that. In a transmission device of a system for wirelessly transmitting a signal such as video, audio, data, etc., by a digital modulation method configured by a unit period, a reception state information creating unit, a setting information detecting unit, a state information detecting unit, and a temperature A detection unit, an image generation unit, and an image display unit, wherein the reception state information is imaged by the image generation unit, and at least one of the video, the audio, the setting information, the state information, and the temperature in the transmission apparatus A transmission apparatus characterized in that an image is imaged by the image generation means and superimposed on the reception status information and displayed on the image display means.