JP2003309536A - Signal configuration, and transmitter and receiver - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a signal configuration which can recognize a transmitter which is transmitting main data even when the main data cannot be reproduced. <P>SOLUTION: In the signal configuration including the main data, a SYNC pattern indicative of the header part, a bit pattern indicative of set information of the main data, and a TMCC having a residue part for each frame; a bit pattern indicative of identification information unique to the transmitter is arranged in the residue part of the TMCC. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a frame unit,
The present invention relates to a signal configuration including a main data, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a TMCC having a surplus portion, a transmitting device, and a receiving device.

[0002]

2. Description of the Related Art Radio waves allocated to broadcasters for video relay are 7 GHz band and 10 GHz band,
There are about 40 channels in total. In the same region, consideration is given to avoid overlapping channel assignments. Therefore, since the same channel is assigned to broadcasters in different regions, there is no particular problem in normal use.

However, in order to relay various events, accidents, etc., there is also an opportunity to perform video relay in an area near the adjacent region. When trying to secure a relay line in such a state, it is necessary to confirm whether or not the radio wave of the same channel is already being used in the region or a neighboring region.
If the radio wave source is a radio wave transmitted by another relay work group of the same broadcasting station, it can be avoided by changing the channel used. However, if the radio wave transmission source is another station and it is already used for production broadcasting, the relay of the other station will be damaged. As described above, it is very important to confirm the channel usage status.

By the way, if the conventional analog system is used,
Even if the received radio wave was weak, although the screen was in a sandstorm state, it was often possible to obtain a barely discernible image. Therefore, it was possible to confirm the station in use and the fact that it is being used in production from the program content of the received channel.

However, when digitized, an image with no deterioration up to the error correction limit can be obtained, but on the other hand, when the error correction limit is exceeded, the image cannot be reproduced at all. In such a case, the channel usage status cannot be confirmed as described above.

As a typical digital transmission, OFDM (Orthogonal Frequency Division Multip
lexing) is used. The OFDM modulation is transmission using a large number of carriers, and TMCC (Transmission and Multiplex) that transmits auxiliary data information in addition to main data.
It has a carrier called ng Configuration Control). Main data is a transport stream (hereinafter referred to as TS) in which video and audio signals are compressed by MPEG processing.
That is.

A few years ago, video and audio were transmitted by the analog FM method. In the analog FM, the SN of video and audio changes depending on the received electric field level. In mobile transmission such as a marathon where the electric field level changes drastically, the relayed image is likely to be a low-quality signal with a lot of noise and disturbance.

In digital transmission such as OFDM, information is digitized and error correction processing is also used. Therefore, even if the received electric field level changes, the same quality video can be relayed and transmitted within the range where the error correction works.
When the electric field level falls below the limit value, error correction becomes impossible and image transmission becomes impossible.

This limit value has a contradictory relationship with the amount of data to be transmitted. 64QA, which is as high as 60 Mbps
In case of M and convolution correction 5/6 mode, the limit CN is 2
It is about 2 dB, and the limit of the reception electric field is required to be about -75 dBm or more. QPS with a small transmission rate of 12 Mbps
K and convolution correction 1/2 mode, the limit CN is 6
It is about dB, and the limit of the reception electric field is about -89 dBm or more, and an image can be transmitted. If the transmission rate is low,
As a result of increasing the compression rate by the MPEG processing, a phenomenon in which the image quality deteriorates also occurs.

The environment for transmitting video varies in various ways depending on the transmission distance and whether it is mobile or fixed. The user, who decides whether to attach importance to the transmission amount or the transmission limit, determines the use mode according to the transmission environment.

In order to meet such demands, the digital FPU has 64QAM, 32QAM, 16QAM, and QPS.
It has K and 4 types of modulation settings. In addition, there is no convolution ratio related to the strength of error correction, 5/6, 3/4, 2 /
There are 5 types of correction settings such as 3, 1/2. This setting mode must be set the same on the transmitting side and the receiving side.
It should be noted that if these transmitting side setting information is sent to the receiving side, automatic setting becomes possible, and it becomes unnecessary to set the demodulation mode one by one.

The setting information for automatically setting this setting, rather than manually, is transmitted using a carrier called TMCC. Since all of the setting information is information on the basic mode, it is BPSK-modulated with high transmission resistance and transmitted.

The receiving side demodulates the TMCC carrier,
The mode of the main data is obtained by reproducing the setting information and the mode of the main data receiving unit is set. By using this function, the mode state of the receiving side can be automatically set only by changing the setting of the transmitting side.

As a reference material in which outlines of 64QAM to QPSK, correction, etc. are described, a journal of the Institute of Image Information and Television Engineers (Vo
1.52-No11 1988) P32-36.

FIG. 22 shows a conventional signal structure. It is composed of main data D and TMCC on a frame-by-frame basis.
C has a SYNC pattern indicating a header portion, a bit pattern indicating setting information of main data, and a surplus portion.

FIG. 23 shows the structure of the transmitter 10 for generating and transmitting the transmission signal having the signal structure shown in FIG. The video input is input to the MPEG-2 encoder 11 and becomes compressed data Data. This compressed data becomes the main data. Setting information such as the modulation mode serves as auxiliary data.

The compressed data Data is the transmission line encoder 1
2 results in data Ds. In the transmission line encoder 12,
Code 47h existing in 204 W (word) cycle is detected, 47h is replaced with B8h every 8 cycles, energy diffusion processing is performed to invert the signal in a specific pattern, and interleaving is performed by rearranging the data order and correction is performed. Data parity is added to create data Ds. Since 1W has 8 bits, B8h exists every 13056 bits.

The data Ds is input to the main data modulator 13. For example, the main data D is mapped for each predetermined data.

Setting information (correctly, a bit pattern indicating the setting information) which is a condition for creating the main data D is input to the mode setting terminal of the main data modulator 13 and the TMCC generator 14. The main data modulator 13 is the TMCC generator 1
The modulation operation is performed according to the frame pulse from 4. Output main data D and TMCC modulated by the main data modulator 13
The output TMCC modulated by the generator 14 is OFDM-modulated after being synthesized by the integrator 15 which operates on the basis of the frame pulse, and the band centered around 130 MHz is about 1
The IF signal is composed of 7 MHz multicarrier.

The IF signal generated by the integrator 15 is sent to the transmission high-frequency section 16, frequency-converted into a microwave signal and power-amplified into an RF signal. Then, it is transmitted as a radio wave from the antenna 17.

FIG. 24 shows the configuration of the main data modulator 13 in the transmitter of FIG. The setting information is input to the time axis converter 13-1, the error correction code adder 13-2, and the encoder 13-3 to determine the operation mode of each unit.

The time axis converter 13-1 performs time axis conversion for inserting a time space for inserting parity, TMCC and CP (pilot signal) to be added, which are created in the subsequent processing, into the input data Ds. To do. In this operation, the clock oscillator 13-
It is performed according to the clock from 4. It operates at a partially faster speed than the input speed to secure free time space.

The error correction code adder 13-2 performs a calculation from the input data to create and add a parity signal. This operation is performed according to the clock from the clock oscillator 134 with the frame signal as a reference. Parity is added to the time space vacated in the previous stage. In consideration of the processing delay time of the time axis conversion processing in the previous stage, the processing is started after a predetermined time has elapsed after the input of the frame signal. Also in the subsequent processing, the operation is started based on the frame signal in consideration of the processing delay in the previous stage.

The encoder 13-3 collects the input data bits according to the modulation mode instructed by the setting information and maps them on the I axis and the Q axis. In 64QAM mode,
The input 6 bits are put together and converted into a signal corresponding to any of 8 × 8 64 points. This 6-bit grouping process is also performed with the frame signal as a reference. 16QA
If M mode is specified, 4 bits are grouped together and converted into a signal corresponding to any of 4 × 4 16 points,
The main data D shown in FIG. 22 is output in frame units.
The clock oscillator 13-4 gives a constant frequency CK for operation to each of the aforementioned processors.

FIG. 25 shows the TM in the transmitter of FIG.
The structure of the CC generator 14 is shown. Setting information from the outside,
It is input to the setting information generator 14-2. The frame signal is input to the MUX 14-6. The MUX 14-6 includes a SYNC generator 14-1 and a setting information generator 14-2.
The output from is input. The MUX 14-6 sequentially switches the input SYNC code and setting information on a frame-by-frame basis in accordance with the input frame signal.
The SYNC code, the setting information, and the surplus portion that make up the TMCC shown in 2 are output in frame units.

FIG. 26 shows the configuration of the integrator 15 in the transmitter shown in FIG. The SEL / CP inserter 15-1 is
With the frame signal as a reference, main data D that is an input, TMCC that is another input, and CP that is a reference pilot that is generated by itself are selected with the frame signal as a reference timing.

The operation is shown in FIG. The main data D from the main data converter 13 has a time space of TMCC and CP, so that TMCC and CP are available during the empty period.
Select and insert.

The IFFT device 1 in the next stage of the integrator 15 in FIG.
In the signal input to 5-2, for example, a CP is inserted for every 8 data, and TMCC is also allocated to a predesignated empty time space.

Next, the operation of each unit will be described. IFFT
The device 15-2 performs multicarrier modulation by, for example, regarding 1024 pieces of data as frequency components and creating a waveform for about 50 μs time. The first input data determines the modulation of the lowest carrier and the next input data determines the modulation of the second lowest frequency carrier. After that, this is continued 1024 times. As a result, a waveform for about 50 μs, which is called one symbol, is created and output.
Note that this operation is also started based on the frame signal.

The guard adder 15-3 arranges the waveform corresponding to the 1/16 symbol period of the end portion of the input signal in the time vacant space of the symbol and creates the waveform of the 17/16 symbol period. A partial 1/16 period of the signal of 1 symbol is output twice. This period is called a guard interval. Note that this operation is also started based on the frame signal.

The quadrature modulator 15-4 converts the input signal into a baseband analog signal by DA conversion by the DA converter 15-41, and the frequency corresponding to the local frequency from the local oscillator 15-43 is converted by the mixer 15-42. It converts and outputs an IF signal.

The IF signal output from the integrator 15 is shown in FIG.
Is input to the transmission high frequency unit 16 and becomes an RF signal.

FIG. 28 shows a conceptual diagram of the OFDM modulated wave which is the output of the transmitting high frequency section 16 in the transmitting apparatus of FIG. The image of all carriers is shown in the above figure. It is composed of multiple carriers of multiple carriers.

The breakdown of the carrier wave is that most of them are shown in white.
A data carrier, which is modulated based on Data information. When the encoding is 64QAM, one carrier has 6
Determined by bit information.

Further, a local oscillator 15-
CP carriers for measuring the frequency shift and the phase amplitude shift of 43 (FIG. 26) are inserted at regular intervals.
Normally, it is modulated with a constant value.

Further, there is a TMCC carrier for transmitting TMCC information, which is shown by hatching. This is a 1-bit B
It is encoded with PSK. This carrier wave is changed to the following information every one symbol period. Note that these frequency arrangements are constant regardless of time.

Here, since the CP carrier is modulated with a constant amplitude and a phase, a reverse correction of the phase amplitude for returning the deviation of the amplitude & phase to a predetermined constant value is performed on all carriers by a diagram in a receiving device described later. The correction unit 23-7 in the separation unit 23 of 30 performs this. As a result, the amplitude and the phase including the data carrier are close to those at the time of transmission.

Since the data carrier changes in both amplitude and phase depending on the combination of coded 6 bits, it is difficult to use it for distortion correction of the transmission line, and CP carrier modulated with constant information is indispensable. is there.

FIG. 29 shows the structure of the receiving apparatus 20 for receiving the transmission signal having the signal structure shown in FIG. Reception antenna 21
The RF signal of the radio wave that has arrived at is input to the reception high frequency unit 22. The reception high frequency unit 22 amplifies a weak signal,
Convert to an intermediate frequency signal IF in the 0 MHz band. This IF signal is input to the separation unit 23.

The IF signal is separated and demodulated by the separation unit 23 into main data D and TMCC. Each signal is input to the main data demodulator 24 and the TMCC regenerator 25. The frame pulse reproduced by the TMCC regenerator 25 based on the information extracted from the input data is sent to the main data demodulator 24.

The separation unit 23 and the main data demodulator 24 demodulate with the frame pulse as a reference. Furthermore, TMCC
The various setting information extracted by the regenerator 25 is connected to the mode setting terminal of the main data demodulator 24 and determines the conditions for creating the output data Ds. The output data Ds of the main data demodulator 24 is input to the transmission path decoder 26.

The transmission path decoder 26 is, for example, 130
The code of B8h existing in the 56-bit cycle is detected, and the reverse energy diffusion pattern is generated from the pulse generated based on this position. Next, using this reverse energy diffusion pattern signal, reverse processing of the data Ds is performed,
In addition, error correction is performed, Data is restored, and MPEG is
-2 to the decoder 27.

The MPEG-2 decoder 27 decompresses the decompressed Data and restores it to the data before being compressed by the transmitter 10.

FIG. 30 shows the structure of the separating unit 23 in the receiving apparatus shown in FIG. The output signal IF of the reception high frequency unit 22 in the receiving apparatus of FIG. 29 is input to the quadrature demodulator 23-1 and frequency-converted into a baseband band, and then becomes a digital signal. This output is input to the FFT unit 23-2, the frequency components are converted, and the low-frequency components are output in order. In addition, FS created based on the frame signal
Conversion is performed based on the Tvc pulse and CK.

The synchronous reproducing section 23-3, based on the phase difference between the frame signal and the self-generated FSTvc pulse,
Control the frequency of CK. Further, the FSTvc pulse which is the reference of the operation is supplied to each section.

The corrector 23-7 corrects the distortion generated in the transmission line for the signal in the entire band based on the phase and amplitude of the input CP. Further, the oscillator 23-in the quadrature demodulator 23-1
The frequency and phase of 13 are controlled to remove the distortion. Note that these operations are based on the FS created based on the frame signal.
It is performed based on the Tvc pulse and CK.

The output of the compensator 23-7 is the D selector 23-
5 and the TMCC selector 23-6. D selector 2
In 3-5, conversion is performed in which only the portion corresponding to the data D is gated and output based on CK and the FSTvc pulse created based on the frame signal. TMCC selector 23
-6 also operates based on the FSTvc pulse created based on the frame signal and CK, and gates and outputs only the portion corresponding to TMCC.

FIG. 31 shows the configuration of the main data demodulator 24 in the receiver shown in FIG. The setting information is the decoder 2
4-1, Error Corrector 24-2, Time Axis Converter 24-3
Is input to determine the operation mode of each part.

The decoder 24-1 receives the input data D
The sent data value is identified based on the mapping point of.
Regarding the presence or absence of the target signal, the processing timing is determined based on the FSTvc pulse created based on the frame signal and CK.

The error corrector 24-2 performs error correction based on the parity information of the identified signal. Note that this conversion is also performed based on the FSTvc pulse created based on the frame signal and CK.

The time axis converter 24-3 converts an error-corrected intermittently existing signal into continuous data. In addition,
This conversion is also performed based on the FSTc pulse created based on the frame signal and CK. One frame is 20
Description will be made assuming that it is composed of four symbols.

FIG. 32 shows the TM in the receiver shown in FIG.
The structure of the CC regenerator 25 is shown. The input TMCC is
It is input to the SYNC detection 25-3 and the serial-parallel converter 25-1. The output of the SYNC detector 25-3 is input to the reset terminal of the frame counter 25-4 and the delay device 25-14. In order to capture the parallelized information from the frame counter 25-4 at a predetermined timing. Latch signal is output. The setting information sent from the sender is
It is captured by the latch 25-2 and output. Delay device 2
5-14 delays the SYNC extraction signal for one frame period and outputs it as a frame signal.

[0053]

As described above, in transmitting digital information, the main data is 64Q.
The data is transmitted after being AM, 32QAM, 16QAM, and QPSK modulated, but if the transmission state is poor, the main data cannot be reproduced.

However, since the TMCC transmission is modulated in a mode called BPSK or DBPSK, which has a high error resistance, the TMC can be reproduced even if the main data cannot be reproduced.
C is reproducible and has much higher reliability than the transmission of main data.

Here, the interference with other stations will be described.
With reference to FIG. 20, a case will be described in which the M channel (main data), which originally has priority to the B station, is used by the A station against the schedule. However, B head office receiver 20rxB
And the distance from the A-station destination transmitter 10txA is short. Station B investigates the use of M channel. However, B
Since the distance between the main station receiver 20rxB and the A station destination transmitter 10txA is short, the radio wave level from other than the B station destination transmitter 10txA is stronger. Therefore, the transmission content is transmitted without error, the codec in the subsequent stage performs a normal decoding process, and the content of the image A can be recognized by the B main station receiver 20rxB.
Therefore, the station B can identify the user of the M channel, and by informing the station A of the priority, the use of the station A is stopped,
Channel available. Even if station B does not use the M channel and station B uses the M channel forcibly, the radio wave from the station A destination transmitter is strong and the transmission is difficult due to interference.

Next, referring to FIG. 21, the D head office receiver 20
A case where the distance between rxD and the C station destination transmitter 10txC is long will be described. Station D investigates the use of N channel (main data). However, since the distance between the D main station receiver 20rxD and the C station destination transmitter 10txC is long, it can be barely understood by the reception electric field meter or the like that radio waves are being emitted from the C station destination transmitter 10txC to the N channel. However, if the radio wave level is weak, there will be many errors in the transmission content, and the codec in the latter stage will not be able to perform normal decoding processing.
I do not know the contents of. Therefore, station D cannot specify the user of N channel, and cannot use the N channel because the transmitting device of the partner station to which the priority is notified cannot be known. Even if the N channel is forcibly used, if the propagation state from the D station destination transmitter deteriorates, there is a problem that a stable transmission line cannot be maintained due to interference from the C station destination transmitter.

Generally, it is a program that is regularly broadcast.
For dramas and varieties, the station can be easily estimated from the video content. However, in the case of an incident, it is extremely difficult to identify the station in use from the scene video. But,
If a value obtained by coding a station name is previously inserted in a portion having high transmission resistance, the station name according to the code is displayed, so that the transmitting device of the partner station that is being used can be easily specified.

Further, when a transmission test is performed in advance using a channel (main data) having no special priority, it is very important that interference is given if another station is in actual use. , It is necessary to refrain from the transmission test.
However, if the identification information indicating that it is a production or a test is included, it becomes clear whether it is a production or not, and it is not necessary to refrain from the transmission test.

In a case called semi-fixed transmission in which the device is installed and transmitted at a fixed point, the intensity of the radio wave arriving from another station is almost constant. Therefore, once it is confirmed that there is no interference, it can be inferred that there is no significant change in the interference state for a while. However, in the case of a movement in which the transmission point changes from moment to moment, there are cases where the transmission point approaches and the radio waves from other stations become stronger. Therefore, even if it is confirmed that no interference occurs, a large change in the interference state may occur within a few minutes. However, if the identification information indicating mobile transmission or semi-fixed is included, it is possible to easily estimate the presence or absence of a large change in the interference state in a short period. Therefore, in the above information determination, it is possible to grasp the content of the predetermined channel even when the radio wave condition is weak, as shown in FIG. 21, by using the highly resistant TMCC and increasing the information insertion frequency if possible. Become.

It is an object of the present invention to provide a signal structure, a transmitting device and a receiving device capable of recognizing a transmitting device transmitting main data even if the main data cannot be reproduced.

Another object of the present invention is to provide a signal structure and a transmission which can more reliably recognize a transmitting device which is transmitting main data even if the main data cannot be reproduced, even in a poor radio wave condition. An object is to provide a device and a receiving device.

[0062]

SUMMARY OF THE INVENTION According to the present invention, a signal composed of main data, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a TMCC having a surplus portion is provided for each frame. In the configuration, a signal pattern is characterized in that a bit pattern indicating identification information unique to a transmission device is arranged in the surplus portion of the TMCC.

According to the present invention, main data is provided in frame units.
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
A transmitting device for transmitting a signal configuration composed of MCC, comprising: means for arranging a bit pattern indicating identification information unique to the transmitting device in the surplus portion of the TMCC. .

According to the present invention, the main data is
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
MCC and a transmission signal having a signal configuration in which a bit pattern indicating identification information unique to a transmission device is arranged in the surplus portion of the TMCC, and the transmission device unique identification is performed from the received transmission signal. The receiving device is provided with means for extracting a bit pattern indicating information.

The present invention is the receiving apparatus further comprising means for reproducing and displaying the identification information from the extracted bit pattern indicating the identification information.

According to the present invention, the main data and
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
In the signal configuration composed of MCC and
The signal structure is characterized in that a bit pattern indicating identification information unique to a transmitting device is arranged a plurality of times in the surplus portion of C.

According to the present invention, the main data and
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
A transmitting device for transmitting a signal configuration composed of MCC, comprising a means for arranging a bit pattern indicating identification information unique to the transmitting device in the surplus portion of the TMCC a plurality of times. Is.

According to the present invention, the main data and
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
MCC and a transmission signal having a signal structure in which a bit pattern indicating identification information unique to a transmission device is arranged a plurality of times in the surplus portion of the TMCC, and the transmission device unique from the received transmission signal. And a means for extracting a bit pattern indicating the identification information of the transmitting device and extracting as a bit pattern indicating the identification information unique to the transmitting device when a large number of times out of the plurality of times is detected. .

The present invention is the receiving apparatus, further comprising means for reproducing and displaying the identification information from the extracted bit pattern indicating the identification information.

According to the present invention, the main data is
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
In the signal configuration including MCC, a bit pattern indicating identification information unique to the transmission device is arranged over the surplus portion of a plurality of frames.

According to the present invention, the main data and
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
A transmitting device for transmitting a signal configuration composed of MCC comprises means for arranging a bit pattern indicating identification information unique to the transmitting device in the surplus part of the TMCC over the surplus parts of a plurality of frames. It is a transmitting device characterized by the above.

According to the present invention, the main data and
T having a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a surplus portion
A bit pattern, which is composed of MCC and which indicates identification information unique to a transmitting device, receives a transmission signal having a signal configuration arranged over the redundant portion of a plurality of frames, and is arranged over the redundant portion of a plurality of frames. A receiving device comprising means for extracting a bit pattern indicating identification information unique to the transmitting device and extracting as a bit pattern indicating identification information unique to the transmitting device when a large number of the plurality is detected. is there.

The present invention is the receiving apparatus further comprising means for reproducing and displaying the identification information from the extracted bit pattern indicating the identification information.

[0074]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows a first signal configuration of the present invention.
An embodiment of is shown. The signal configuration is, on a frame-by-frame basis, a main data D, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data D, a TMCC1 including a TMCC having a surplus portion, and a TMCC.
1 is composed of a TMCC consisting of a TMCC 2 in which a bit pattern indicating identification information unique to the transmitting device is arranged in a surplus portion of 1.

FIG. 2 shows the structure of the transmitter 10 for generating and transmitting the transmission signal having the signal structure shown in FIG. Conventional FIG.
The difference from the configuration of the above is that an identification information generator 14c is added and the output of the TMCC generator 14 is changed to the conventional TMC of FIG.
Change the display from C to TMCC1 and change the integrator from 15 to 15
It is changed to c.

The output TMCC2 of the identification information generator 14c is input to the integrator 3c. The frame pulse from the TMCC generator 14 is input to the identification information generator 14c.
The output data Ds from the transmission line encoder 12 is input to the main data modulator 13.

The IF signal generated by the integrator 15c is sent to the transmission high-frequency section 16, frequency-converted into a microwave signal, power-amplified, and transmitted as radio wave RF from the transmission antenna 17.

Here, the identification information generator 14c generates a carrier in which the identification information is inserted in the symbol matched with the timing of the main data D and TMCC1 based on the frame pulse. Then, a frame signal synchronized with the PN reset signal of the transmission line encoder 12 is generated.

The TMCC generator 14 generates TMCC1 as shown in FIG. 21 in synchronization with the frame signal, and includes identification information (correctly, a bit pattern indicating the identification information) in the period of the surplus portion. It operates so that TMCC2 is inserted. A modulated wave that matches the output data D that has been subjected to the modulation processing is passed through the integrator 15c in which the number of signal systems to be integrated is increased by one.

FIG. 3 shows the configuration of the identification information generator 14c in the transmitter of FIG. Identification information device 14c-20
Outputs n-bit identification information to the MUX 14c-6. The MUX 14c-6 includes a timing generator 14c-5.
1 bit of the identification information in synchronization with the frame signal from
Select bit by bit to generate TMCC2.

Next, the operation of the identification information generator 14c shown in FIG. 3 will be described with reference to FIG. During a period from time t01 to time t02 in FIG. 1, the TMCC generator 14 in FIG. 2 outputs TMCC1 modulated by SYNC and setting information. Time t02 in FIG.
During the period from t03 to t03, the identification information generator 14c outputs TMCC2 modulated with the identification information. After time 03 in FIG. 1 t
Up to 10, TMCC1 modulated with the data for the surplus portion is output from the TMCC generator 14.

FIG. 4 shows an integrator 1 in the transmitter of FIG.
5c shows the configuration. The difference from the conventional configuration of FIG. 25 is that the SCL / CP inserter 15-1 is changed to 15c-1,
The point is that the signal configuration of FIG. 1 is obtained by inputting TMCC2.

The SEL / CP inserter 15c-1 is the main data D that is an input, the TMCC1 that is the second input, the TMCC2 that is the third input, and the reference pilot generated by itself, with reference to the frame signal. CP and CP are selected with the frame signal as the reference timing.

Since the main data D from the main data converter 13 has a time space of TMCC1, TMCC2, and CP, the TMCC1 and TMCC2 are available during the empty period.
And CP, and insert.

FIG. 5 shows the configuration of the receiving apparatus 20 for receiving the transmission signal having the signal configuration shown in FIG. The difference from the conventional configuration of FIG. 29 is that the identification information regenerator 25c and the station name converter 2
8 and display 29 are added.

The RF signal of the radio wave that has reached the receiving antenna 21 is input to the receiving high frequency section 22 and converted into an intermediate frequency signal IF in the 130 MHz band. This IF signal is input to the separation unit 23. The TMCC signal from the separation unit 23 is
It is input to the TMCC regenerator 25 and the identification information regenerator 25c. The identification information reproducer 25c reproduces and outputs the identification information in the latter half of the TMCC.

The identification information from the identification information reproducing device 25c is
It is input to the station name converter 28 and converted into a station name. The converted station name is input to the display unit 29, converted into characters and displayed as the station name. Specifically, it is TBS, NHK, NTV, etc., which consist of about three letters.

FIG. 6 shows the configuration of the identification information reproducing device 25c in the receiving apparatus of FIG. The input TMCC is input to the serial-parallel converter 25c-1 and the SYNC detector 25c-3. The output of the serial-parallel converter 25c-1 is a latch 25c.
-2 is input. The output of the SYNC detector 25c-3 is input to the reset terminal of the frame counter 25c-4. The frame counter 25c-4 receives the timing signal to the serial-parallel converter 25c-1 and the latch 25c-2.
Output timing signal to.

Next, the operation will be described. The frame counter 25c-4 parallelizes the identification information serialized and modulated from time 02 to time t03 in FIG. 1 at a predetermined timing, and latches the parallel information.
-2 captures and outputs as identification information.

FIG. 7 shows a second embodiment of the signal structure of the present invention. The signal structure is frame-by-frame and the main data D
, A SYNC pattern showing a header part, a bit pattern showing setting information of the main data D, and a T having a surplus part.
It is composed of a TMCC1 composed of an MCC and a TMCC composed of a TMCC2 in which a bit pattern indicating identification information unique to the transmitting device is arranged a plurality of times in a surplus portion of the TMCC1. In FIG. 7, a bit pattern indicating identification information unique to the transmitting device is arranged three times.

FIG. 8 shows the structure of the transmitter 10 for generating and transmitting the transmission signal having the signal structure shown in FIG. The difference from the configuration of FIG. 2 is that the identification information generator is changed from 14c to 14d.

FIG. 9 shows the configuration of the identification information generator 14d in the transmitter of FIG. Identification information device 14d-20
Uses the n-bit identification information as the first information.
Enter it in d-6. The identification information device 14d-21 inputs n-bit identification information as second information to the MUX 14d-6. The identification information device 14d-22 inputs the n-bit identification information as the third information to the MUX 14d-6. M
The UX 14d-6 selects the bits of the identification information bit by bit in synchronization with the frame signal from the timing generator 14d-5 and generates and outputs TMCC2.

Next, the operation of the identification information generator 14d shown in FIG. 9 will be described. During the period from time t01 to time t02 in FIG. 7, TCC modulated by the TMCC generator 14 in FIG. 8 with SYNC and setting information is used.
Since the MCC1 carrier is output, the modulation process is stopped. In the period from time t02 to t03 in FIG. 7, the first identification information is modulated by the MUX 14d-6,
Output C2. In the period from time t03 to t04 in FIG. 7, the second identification information is modulated by the MUX 14d-6 and TMCC2 is output. From time t04 to t1 in FIG.
In the period of 0, the third identification information is modulated by the MUX 14d-6 and the TMCC2 is output. Since the first to third identification information are the same, the identification information is TMCC.
The signal is modulated as two carriers and is repeatedly output three times. After time t10 in FIG. 7, the same information as from t01 to t10 is repeated.

FIG. 10 shows the configuration of the receiving apparatus 20 for receiving the transmission signal having the signal configuration shown in FIG. The difference from the configuration of FIG. 5 is that the identification information reproducer is changed from 25c to 25d.

FIG. 11 shows the configuration of the identification information reproducing device 25d in the receiving apparatus shown in FIG. The input TMCC is input to the serial-parallel converter 25d-1 and the SYNC detector 25d-3. The output of the serial-parallel converter 25d-1 is the latch 2
5d-2, the latch 25d-2b, and the latch 25d-2c. The output of the SYNC detector 25d-3 is input to the reset terminal of the frame counter 25d-4.

The frame counter 25d-4 receives the timing signal to the serial-parallel converter 25d-1 and the latch 25d.
-2, a timing signal to the latches 25d-2b, and a timing signal to the latches 25d-2c.

The outputs of the latch 25d-2, the latch 25d-2b, and the latch 25d-2c are input to the majority voter 25d-5. The output of the majority ruler 25d-5 is output as identification information.

Next, the operation will be described. The frame counter 25d-4 collects the identification information, which is time-divided (serialized) in the period corresponding to the time t02 to t03 in FIG. 7, bit by bit and parallelizes it, and then latches the information. To capture. Further, time t in FIG.
The second identification information serialized in the period corresponding to 03 to t04 is parallelized, and the information is latched by the latch 25.
Capture at d-2b. Then, from time t04 to t1 in FIG.
The third identification information serialized in the period corresponding to 0 is parallelized, and the information is captured by the latches 25d-2c.

The three pieces of identification information captured are the majority rule 2
In 5d-5, the majority decision is made and the identification information is output. In this case, the transmission state is bad, and even if any one of the identification information has an error, normal information can be obtained by the majority vote.

The identification information from the identification information reproducer 25d is
It is input to the station name converter 28 in the receiving device of FIG.
Converted to station name. The converted station name is input to the display unit 29, converted into characters and displayed as the station name.

FIG. 12 shows a third embodiment of the signal structure of the present invention. The signal structure is, on a frame-by-frame basis, main data D, a SYNC pattern indicating a header portion, and main data D.
Of the setting information, a TMCC1 composed of a TMCC having a surplus portion, and a bit pattern indicating identification information unique to the transmission device in the surplus portion of the TMCC1 are arranged over the surplus portions of a plurality of frames.
It consists of TMCC consisting of C2. FIG. 12 shows an example in which the identification information is arranged in 1-bit units in frame units.

FIG. 13 shows the configuration of the transmitter 10 for generating and transmitting the transmission signal having the signal configuration shown in FIG. The difference from the configuration of FIG. 2 is that the identification information generators 14c to 14
It is changed to e.

FIG. 14 shows the configuration of the identification information generator 14e in the transmitter of FIG. Identification information device 14e-2
0 indicates that the identification information of n bits is converted to serial-parallel converter 14e-3.
Enter 1. The output of the serial-parallel converter 14e-31 is M
Input to UX14e-6. Timing generator 14e-
The timing signal from 5 is the serial-parallel converter 14e-3.
Input to 1. The frame signal from the timing generator 14e-5 is input to the MUX 14e-6.

Next, the operation of the identification information generator 14e in the transmitter of FIG. 14 will be described. Silipara converter 14e-3
1 outputs the bit of the identification information bit by bit according to the timing signal from the timing generator 14e-5. In this example, 1 bit is switched for each frame.

The MUX 14e-6 is the timing generator 1
In synchronization with the signal from 4e-5, TMCC2 modulated by the bits of the identification information is generated and output.

As a result, from time t01 to t02 in FIG.
13, the TMCC generator 14 of FIG. 13 outputs the TMCC1 carrier modulated by SYNC and the setting information, and the modulation process is stopped. In the period from time t02 to t10 in FIG. 12, one bit forming the identification information is MUX14e−.
After being modulated by 6, TMCC2 is output. If the identification information has n bits, the identification information is modulated by TMCC2 and output in a period of n frames. It should be noted that m bits of a start pattern for adding the start point of the identification information are added, m + n frames are multiplied, and a modulation TM of all bits is obtained.
A configuration in which CC2 is output may be used.

FIG. 15 shows the configuration of the receiving apparatus 20 for receiving the transmission signal having the signal configuration shown in FIG. The difference from the configuration of FIG. 5 is that the identification information reproducer is changed from 25c to 25e.

FIG. 16 shows the configuration of the identification information reproducing device 25e in the receiving apparatus of FIG. The input TMCC is input to the determiner 25e-20 and the SYNC detector 25e-3. The output of the determiner 25e-20 is the serial-parallel converter 25.
It is input to e-1. The output of the serial-parallel converter 25e-1 is input to the latch 25e-2. SYNC detector 25
The output of e-3 is input to the reset terminal of the frame counter 25e-4. The frame counter 25e-4 is
The timing signal to the decision unit 25e-20 and the timing signal to the serial-parallel converter 25e-1 are latched by the latch 25e-2.
Output timing signal to. The output of the latch 25e-2 is output as identification information.

Next, the operation of the identification information reproducing device 25e shown in FIG. 16 will be described with reference to FIG. The frame counter 25e-4 outputs a timing signal to the determiner 25e-20 at time t1 of each frame in FIG. Time t1
From time t3 to time t3, it is determined whether the number of bits of the identification information transmitted K times, which is a large number of times, is 1 or 0, which is more than half, or 1
Are integrated, and it is checked whether or not the number of occurrences is K / 2 times or more, and 1 or 0 is determined. The Silipara converter 25e-1 is
At time t4, bit 1 of the identification information is fetched according to the timing pulse. After that, the above operation is performed n times, which is the number of bits forming the identification information, and a total of n bits, which are determined one by one in one frame, are parallelized.

Next, the entire operation over a plurality of frames will be described with reference to FIG. 18 and an example in which n bits are 3 bits.

In the frame from time t00, the 0th bit of the identification information is transmitted from time t02 to time t10. The determination ends at time t03, and the determination unit 25e-
The result is output from 20. Silipara converter 25e-1
Takes in the 0th bit.

Similarly, the serial-to-parallel converter 25e-1 fetches the first bit which is sent and judged in the next frame from time t10 at time t13. Furthermore, the second bit that is sent and determined in the next frame after time t20 is set to time t23.
The serial-to-parallel converter 25e-1 is loaded into.

At t33, which is three frames after the determination results of all 3-bits forming the identification information are parallelized, the latch 25e-2 captures the data arranged in the serial-parallel converter 25e-1 and uses it as the identification information.

As a result, the transmission condition is very bad and 1
Even if there are many errors in the identification information bits transmitted K times per frame, if the number is less than K / 2, normal information can be obtained by the determination.

The identification information from the identification information reproducing device 25e is
It is input to the station name converter 28 in the receiver of FIG.
Converted to station name. The converted station name is input to the display unit 29, converted into characters and displayed as the station name.

FIG. 19 shows an example of TMCC including identification information.

In the embodiments of the invention described above, the main data modulator, the identification information generator, and the TMCC generator have been described as individually performing the modulation operation. However, the main data modulator, the identification information generator, and the TMCC generator have been described. The generator may only generate the modulated data component, and the integrator may perform the IFFT process.

In the embodiment of the invention described above, T
Although the MCC1 and TMCC2 have been described under the condition that they are generated in separate processing blocks, they may be one processing block in which SYNC, setting information, identification information, and a surplus portion are sequentially switched. An identification information generator, TMCC
The generators may be combined and one TMCC generator may generate the signal configuration.

[0119]

According to the present invention, it is possible to obtain a signal structure, a transmitting device and a receiving device capable of recognizing a transmitting device transmitting main data even if the main data cannot be reproduced. Further, according to the present invention, the signal configuration and the transmitting device and the receiving device that can more reliably recognize the transmitting device that is transmitting the main data even if the main data cannot be reproduced even in a situation where the radio wave condition is worse. Can be obtained.

[Brief description of drawings]

FIG. 1 is a diagram showing a first embodiment of a signal configuration of the present invention.

FIG. 2 is a diagram showing a configuration of a transmission device that generates and transmits a transmission signal having the signal configuration of FIG.

3 is a diagram showing a configuration of an identification information generator in the transmitting device of FIG.

FIG. 4 is a diagram showing a configuration of an integrator in the transmission device of FIG.

5 is a diagram showing a configuration of a receiving device that receives a transmission signal having the signal configuration of FIG.

6 is a diagram showing a configuration of an identification information reproducer in the receiving apparatus of FIG.

FIG. 7 is a diagram showing a second embodiment of the signal configuration of the present invention.

8 is a diagram showing a configuration of a transmission device that generates and transmits a transmission signal having the signal configuration of FIG. 7.

9 is a diagram showing a configuration of an identification information generator in the transmission device of FIG.

FIG. 10 is a diagram showing a configuration of a receiving device that receives a transmission signal having the signal configuration of FIG. 7.

11 is a diagram showing a configuration of an identification information reproducer in the receiving apparatus of FIG.

FIG. 12 is a diagram showing a third embodiment of the signal configuration of the present invention.

13 is a diagram showing a configuration of a transmission device that generates and transmits a transmission signal having the signal configuration of FIG.

14 is a diagram showing a configuration of an identification information generator in the transmission device of FIG.

FIG. 15 is a diagram showing a configuration of a receiving device that receives a transmission signal having the signal configuration of FIG.

16 is a diagram showing a configuration of an identification information reproducer in the receiving apparatus of FIG.

17 is a diagram showing an operation of the identification information reproducer of FIG.

18 is a diagram showing an overall operation of the identification information reproducer of FIG. 16 over a plurality of frames.

FIG. 19 is a diagram showing an example of a TMCC including identification information.

FIG. 20 is an explanatory diagram of a first case showing interference with another station.

[Fig. 21] Fig. 21 is an explanatory diagram of a second case showing interference with another station.

FIG. 22 is a diagram showing a conventional signal configuration.

23 is a diagram illustrating a configuration of a transmission device that generates and transmits a transmission signal having the signal configuration of FIG. 22.

FIG. 24 is a diagram showing a configuration of a main data modulator in the transmission device of FIG. 23.

FIG. 25 is a diagram showing a configuration of a TMCC generator in the transmitter of FIG. 23.

FIG. 26 is a diagram showing a configuration of an integrator in the transmission device of FIG. 23.

FIG. 27 is a diagram showing an operation of the transmission device of FIG. 23.

FIG. 28 is a diagram showing a conceptual diagram of an OFDM modulated wave.

FIG. 29 is a diagram showing a configuration of a receiving device that receives a transmission signal having the signal configuration of FIG. 22.

30 is a diagram showing a configuration of a separation unit in the reception device of FIG.

31 is a diagram showing a configuration of a main data demodulator in the reception device of FIG. 29. FIG.

32 is a diagram showing a configuration of a TMCC regenerator in the receiving apparatus of FIG.

[Explanation of symbols]

10: transmitter, 11: MPEG-2 encoder, 1
2: Transmission line encoder, 13: Main data modulator, 13-
1: time axis converter, 13-2: error correction code adder,
13-3: encoder, 13-4: clock oscillator, 1
4: TMCC generator, 14c, 14d, 14e: identification information generator, 14-1: SYNC generator, 14-2: setting information generator, 14-5: frame generator, 14-6, 1
4c-6, 14d-6, 14e-6: MUX, 14c-
5, 14d-5, 14e-5: Timing generator, 14
c-20, 14d-20, 14d-21, 14d-2
2, 14e-20: identification information device, 14e-31: Silipara converter, 15, 15c: integrator, 15-1, 15c-
1: SEL / CP inserter, 15-2: IFFT device, 15
-3: Guard adder, 15-4: Quadrature modulation processor, 15
-4: DA converter, 15-42: mixer, 15
-43: local oscillator, 16: transmission high frequency device, 17:
Transmitting antenna, 20: receiving device, 21: receiving antenna,
22: high-frequency receiving unit, 23: separating unit, 23-1: quadrature demodulator, 23-2: FFT unit, 23-3: synchronous regenerator, 2
3-4: voltage control CK generator, 23-5: D selector, 2
3-6: TMCC selector, 23-7: corrector, 24: main data demodulator, 24-1: decoder, 24-2: error corrector, 24-3: time base converter, 25: TMCC Regenerator, 25c, 25d, 25e: Identification information regenerator, 25-
1, 25c-1, 25d-1, 25e-1: Silipara converter, 25-2, 25c-2, 25d-2, 25d-2
b, 25d-2c, 25e-2: latch, 25-3, 2
5c-3, 25d-3, 25e-3: SYNC detector,
25-4, 25c-4, 25d-4, 25e-4: frame counter, 25-14: delay device, 25d-5: majority decision device, 25e-20: decision device, 26: transmission path decoder,
27: MPEG-2 decoder, 28: station name converter, 2
9: Display.

Continued front page    (72) Inventor Takuji Kajiwara             5-3-6 Akasaka, Minato-ku, Tokyo Co., Ltd.             Tokyo Broadcasting Technology Bureau F term (reference) 5K022 DD01 DD13 DD18 DD19 DD23                 5K067 AA33 BB04 BB21 CC02 DD17                       DD25 DD51 EE02 EE10 EE64                       EE71                 5K072 AA04 AA24 BB02 BB14 BB25                       BB27 CC13 CC23 CC34 DD11                       DD16 FF06 FF24 GG12 GG13

Claims (12)

[Claims] 1. A signal structure comprising, for each frame, main data, a SYNC pattern indicating a header part, and a TMCC having a surplus part and a bit pattern indicating setting information of the main data. A signal structure characterized in that a bit pattern indicating identification information unique to a transmitting device is arranged in the surplus portion. 2. A transmission apparatus for transmitting a signal structure, which is composed of main data, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a TMCC having a surplus portion, in frame units. A transmitting apparatus comprising means for arranging a bit pattern indicating identification information unique to the transmitting apparatus in the surplus portion of the TMCC. 3. A frame-based main data, a SYNC pattern indicating a header part, a bit pattern indicating setting information of the main data, and a TMCC having a surplus part, and the surplus part in the TMCC. A means for receiving a transmission signal having a signal structure in which a bit pattern indicating identification information unique to the transmission device is arranged, and extracting a bit pattern indicating identification information unique to the transmission device from the received transmission signal. Receiving device. 4. The receiving device according to claim 3, further comprising means for reproducing and displaying the identification information from a bit pattern indicating the extracted identification information. 5. A signal structure comprising main data, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a TMCC having a surplus portion for each frame, in the TMCC. A signal configuration characterized in that a bit pattern indicating identification information unique to a transmission device is arranged a plurality of times in the surplus portion. 6. A transmitting device for transmitting a signal structure, which is composed of main data, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a TMCC having a surplus portion, in frame units. A transmitting device comprising means for arranging a bit pattern indicating identification information unique to the transmitting device in the surplus portion of the TMCC a plurality of times. 7. In a frame unit, main data, a SYNC pattern indicating a header part, a bit pattern indicating setting information of the main data, and a TMCC having a surplus part are included, and the surplus part in the TMCC is formed. A transmission signal having a signal configuration in which a bit pattern indicating identification information unique to the transmission device is arranged a plurality of times is received, and a bit pattern indicating identification information unique to the transmission device is extracted from the received transmission signal to extract the plurality of times. Is detected as a bit pattern indicating the identification information unique to the transmitting device, the receiving device. 8. The receiving apparatus according to claim 7, further comprising means for reproducing and displaying the identification information from the extracted bit pattern indicating the identification information. 9. A unique identification of a transmitting device in a signal structure including, for each frame, main data, a SYNC pattern indicating a header part, a bit pattern indicating setting information of the main data, and a TMCC having a surplus part. A signal configuration characterized in that a bit pattern indicating information is arranged over the redundant portions of a plurality of frames. 10. A transmission device for transmitting a signal structure, which is composed of main data, a SYNC pattern indicating a header portion, a bit pattern indicating setting information of the main data, and a TMCC having a surplus portion, in frame units,
A transmitting apparatus comprising means for arranging a bit pattern indicating identification information unique to the transmitting apparatus in the redundant portion of the TMCC over the redundant portions of a plurality of frames. 11. A bit indicating, for each frame, main data, a SYNC pattern indicating a header portion, a bit pattern indicating the setting information of the main data, and a TMCC having a surplus portion, and indicating identification information unique to a transmitting device. The pattern receives a transmission signal having a signal configuration arranged over the surplus portion of a plurality of frames, extracts a bit pattern indicating identification information unique to the transmitting device arranged over the surplus portion of a plurality of frames, and extracts the plurality of bit patterns. A receiving device comprising means for extracting as a bit pattern indicating identification information unique to the transmitting device when a large number of the above are detected. 12. The receiving device according to claim 11, further comprising means for reproducing and displaying the identification information from a bit pattern indicating the extracted identification information.