JP2003101512A - Communication system and method therefor, display device, tuner device, optical disc reproduction device, camera device and data processing device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a communication system capable of improving the degree of freedom in installment location of devices along with a better appearance. SOLUTION: A TV signal received at an antenna 12 is extracted as a channel signal at a tuner unit 13. The extracted signal is modulated with an ultra wideband impulse communication method at a UWB transmission unit 14, and transmitted to a display device 3 via an antenna 15. In the display device 3, the channel signal is demodulated by a USB reception unit 22 and outputted to a signal processing unit 23, after the signal is received by an antenna 21. In the signal processing unit 23, the display and the audio output of a video/ audio output circuit 24 are controlled, based on the channel signal.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a communication system and method in which a display device receives a channel signal or a reproduction signal by wireless communication, a tuner device used in the communication system, an optical disk reproducing device,
The present invention relates to an imaging device and a data processing device.

[0002]

2. Description of the Related Art For example, as shown in FIG. 15, in a conventional television system 501, a tuner section 13 of a tuner device 502 converts a television signal received by an antenna 12 into a channel signal, and an interface section 550.
To transmit a channel signal to a display device 503 such as a flat panel display via a cable 540. The display device 503 is a tuner device 50.
The interface unit 551 receives the channel signal from No. 2 and outputs it to the signal processing unit 523. The signal processing unit 523, based on the input channel signal,
It controls image display and audio output by the audio output circuit (display drive unit) 24.

[0003]

However, in the conventional television system 501 described above, the tuner device 50 is used.
2 and the display device 503 communicate with each other via the cable 540, there is a problem that the tuner device 502 and the display device 503 are not freely arranged. There is also a problem that the cable 540 makes the appearance unpleasant. Similar problem is the display device 5
In some cases, an optical disk reproducing device such as a DVD that transmits a signal to the H.03, an image pickup device such as a camcorder, and a data processing device such as a computer are used.

The present invention has been made in view of the above-mentioned problems of the prior art, and it is possible to increase the degree of freedom of the installation place of the display device, the tuner device, the optical disk device, the image pickup device and the data processing device, and it is also attractive. An object of the present invention is to provide a communication system and its method, a display device, a tuner device, an optical disk device, an imaging device, and a data processing device.

[0005]

In order to solve the above-mentioned problems of the prior art and to achieve the above-mentioned object, the communication system of the first invention extracts a designated channel signal from a received signal and A tuner device that generates a signal and a display device that displays an image using the channel signal are provided, and the tuner device modulates the channel signal according to an ultra-wideband impulse communication system and transmits the modulated signal to the display device. The display device has a reception circuit that receives the channel signal transmitted by the transmission circuit and demodulates the received channel signal according to the ultra wideband impulse communication system.

The operation of the communication system of the first invention is as follows. In the tuner device, the designated channel signal is extracted from the received signal to generate the channel signal. Next, in the transmission circuit of the tuner device, the channel signal is modulated according to the ultra wideband impulse communication system and transmitted to the display device. Next, in the receiving circuit of the display device, the channel signal transmitted by the transmitting circuit is received, and the received channel signal is demodulated according to the ultra wideband impulse communication system. Next, in the display device, image display is performed using the channel signal obtained by the demodulation.

In the communication system of the first invention, preferably, the transmission circuit multiplies a spreading code generation circuit for generating a signal of a predetermined spreading code sequence and the channel signal by the signal of the spreading code sequence. The receiving circuit includes a multiplication circuit, a pulse generation circuit that generates a pulse signal having a predetermined cycle corresponding to the level of the signal obtained by the multiplication, and a filter that filters the pulse signal, and the reception circuit includes the reception circuit. And a despreading processing circuit for despreading the channel signal using the same signal as the spreading code sequence, and an integrating circuit for integrating the signal obtained by the despreading processing.

Further, in the communication system of the first invention, preferably, the tuner device has a plurality of the transmission circuits, and the channel signal is divided and transmitted in parallel through the plurality of transmission circuits. The display device has a plurality of receiving circuits corresponding to the plurality of transmitting circuits, combines the plurality of channel signals demodulated by the plurality of receiving circuits, and obtains a channel signal obtained by the combining. Is used to perform the display.

The tuner device of the second invention is a tuner device for extracting a specified channel signal from a received signal to generate a channel signal, and modulating the channel signal according to a predetermined wireless communication system. And a transmission circuit for transmitting to the display device.

A display device according to a third aspect of the present invention is a display device for displaying an image using a channel signal, which receives a channel signal transmitted from a tuner device and sets the received channel signal to a predetermined value. It has a receiving circuit that demodulates according to a wireless communication system, and a signal processing circuit that performs display control using the demodulated channel signal.

The communication system of the fourth invention comprises an optical disk reproducing apparatus for reproducing an optical disk to generate a reproduction signal, and a display apparatus for displaying an image using the reproduction signal. Has a transmission circuit that modulates the reproduction signal according to a predetermined wireless communication method and transmits the reproduction signal to the display device, and the display device receives the reproduction signal transmitted by the transmission circuit and receives the reproduction signal. It has a receiving circuit which demodulates the reproduction signal according to the predetermined wireless communication system.

The optical disk reproducing apparatus of the fifth invention is an optical disk reproducing apparatus for reproducing an optical disk to generate a reproduction signal, the reproduction signal being modulated according to a predetermined wireless communication system and transmitted to the display apparatus. It has a transmission circuit for.

The display device of the sixth invention is a display device for displaying an image using a reproduction signal, wherein the reproduction signal transmitted by the optical disc reproduction device is received and the received reproduction signal is predetermined. A reception circuit that demodulates according to a wireless communication system and a signal processing circuit that performs display control using the demodulated reproduction signal are included.

The communication system according to the seventh aspect of the present invention records an imaged image signal in a recording medium, reproduces the image signal read from the recording medium, and generates a reproduced signal, and the reproduced signal. And a display device for performing image display using, the imaging device has a transmission circuit that modulates the reproduction signal according to a predetermined wireless communication scheme and transmits the modulated signal to the display device, and the display device, The reception circuit receives the reproduction signal transmitted by the transmission circuit and demodulates the received reproduction signal according to the predetermined wireless communication scheme.

The image pickup apparatus of the eighth invention is an image pickup apparatus which records a picked-up image signal on a recording medium and reproduces the image signal read from the recording medium to generate a reproduced signal. Has a transmitting circuit for modulating the signal according to a predetermined wireless communication method and transmitting the modulated signal to the display device.

The display device of the ninth invention is a display device for displaying an image by using a reproduction signal, which receives the reproduction signal transmitted by the image pickup device and transmits the received reproduction signal by a predetermined wireless communication. It has a receiving circuit that demodulates according to the system and a signal processing circuit that performs display control using the demodulated reproduced signal.

The communication system according to the tenth aspect of the invention has a data processing device for performing data processing and a display device for displaying an image using the data generated by the data processing. A transmission circuit that modulates the data generated by the data processing according to a wireless communication system and transmits the modulated data to the display device, the display device receiving a signal transmitted by the transmission circuit, and receiving the signal. The received signal is demodulated according to the predetermined wireless communication system to obtain the data.

The data processor of the eleventh invention is
A data processing device that performs data processing, comprising a transmission circuit that modulates data generated by the data processing according to a predetermined wireless communication scheme and transmits the modulated data to a display device.

The display device according to the twelfth aspect of the invention includes a receiving circuit that receives a signal transmitted by the data processing device and demodulates the received signal according to a predetermined wireless communication system, and the demodulated signal. And a signal processing circuit that performs display control based on the above.

The communication method of the thirteenth invention is a communication method for performing communication using a tuner device for extracting a designated channel signal from a received signal and a display device for displaying an image using the channel signal. The tuner device modulates the channel signal according to an ultra-wide band impulse communication system and transmits the modulated signal to the display device, the display device receives the channel signal, and the received channel signal is received. Demodulation is performed according to the ultra wideband impulse communication system, and display is performed according to the demodulated channel signal.

The communication method of the fourteenth invention is a communication method of performing communication using an optical disk reproducing apparatus for reproducing an optical disk to generate a reproduction signal and a display apparatus for displaying an image using the reproduction signal. The optical disk reproducing device modulates the reproduction signal according to an ultra-wide band impulse communication system and transmits the modulated reproduction signal to the display device, the display device receives the reproduction signal, and the received reproduction signal is received. Are demodulated according to the ultra wideband impulse communication system, and display is performed according to the demodulated reproduced signal.

The communication method of the fifteenth invention is a communication method using an image pickup apparatus for recording a picked-up image signal on a recording medium and reproducing the image signal read from the recording medium to generate a reproduced signal. The image pickup device modulates the reproduction signal according to an ultra-wideband impulse communication system and transmits the reproduction signal to the display device, the display device receives the reproduction signal, and the received reproduction signal is displayed. Demodulation is performed according to the ultra wideband impulse communication system, and display is performed according to the demodulated reproduction signal.

The communication method of the sixteenth invention is a communication method for performing communication using a data processing device for performing data processing and a display device for displaying an image using the data generated by the data processing. There, the data processing device modulates the signal of the generated data according to an ultra-wideband impulse communication system and transmits it to the display device, the display device receives the signal, and the received Demodulates the signal according to the ultra wideband impulse communication system,
A display according to the demodulated signal is performed.

[0024]

DETAILED DESCRIPTION OF THE INVENTION A communication system according to an embodiment of the present invention will be described below. First Embodiment This embodiment is an embodiment corresponding to the first to third inventions. FIG. 1 is an overall configuration diagram of a communication system 1 of this embodiment. As shown in FIG. 1, the communication system 1 includes a tuner device 2 via antennas 15 and 21, for example.
And the display device 3 are Ultra Wide Band
It communicates by the impulse communication method. The tuner device 2 corresponds to the tuner device of the second invention, and the display device 3
Corresponds to the display device of the third invention. The ultra-wideband impulse communication system is a radio technology that can effectively use frequency resources, and performs baseband transmission using a signal composed of a pulse train with a very fine pulse width (for example, 1 ns or less). It is a short-range wireless communication system having a bandwidth on the order of GHz such that a value obtained by dividing the occupied bandwidth by the center frequency (for example, 1 GHz to 10 GHz) becomes approximately 1.

[Tuner Device 2] As shown in FIG. 1, the tuner device 2 includes, for example, an antenna 12, a tuner circuit 13, and a UWB (Ultra Wide Band) transmission circuit 14. The UWB transmitter 14 corresponds to the transmitter circuit of the present invention. The antenna 12 receives, for example, a television signal (image signal and audio signal) and outputs the received television signal to the tuner circuit 13.

FIG. 2 is a functional block diagram of the tuner circuit 13. As shown in FIG. 2, the tuner circuit 13 includes, for example, a high frequency amplifier circuit 31, a frequency conversion circuit 32, and an A / D conversion circuit 33. The high frequency amplifier circuit 31
Of the television signals input from the antenna 12, the television signal of the designated channel is selected and amplified. The frequency conversion circuit 32 converts the amplified television signal input from the high frequency amplification circuit 31 into a channel signal. A / D
The conversion circuit 33 converts the analog channel signal input from the frequency conversion circuit 32 into a digital channel signal SG.
It is converted into 1001 and is output to the UWB transmission circuit 14.

The UWB transmission circuit 14 includes a tuner circuit 13
The channel signal SG1001 input from is modulated and transmitted to the display device 3 via the antenna 15. FIG. 3 is a functional block diagram of the UWB transmission circuit 14. FIG. 4 is a diagram showing signal waveforms in each circuit of the UWB transmission circuit 14 shown in FIG. 5 is a diagram showing a signal spectrum of a data sequence in the UWB transmitting circuit 14 shown in FIG. 3, and FIG. 6 is a diagram showing a signal spectrum of a spread signal in the UWB transmitting circuit 14 shown in FIG. FIG. 4 is a diagram showing a spectrum of a signal output from the UWB transmission circuit 14 shown in FIG. 3.

As shown in FIG. 3, the UWB transmission circuit 14
Is, for example, a frequency synthesizer 1001 and a spread code generator 1
002, a multiplier 1003 and a pulse generator 1004. A bandpass filter may be provided after the pulse generator 1004. Further, although the case where the signal is modulated and demodulated by the bi-face method has been illustrated in the present embodiment, the signal may be modulated and demodulated by the PP (Pulse Position) modulation method in the present invention.

The spreading code generator 1002 uses the frequency of the frequency synthesizer 1001 to generate a spreading code sequence SG1002 (see FIG. 4).
(B)) is output to the multiplier 1003. Multiplier 1003
Then, the transmission data SG1001 (FIG.
(A) and FIG. 5) are multiplied by the spread code sequence SG1002 to form a spread signal SG1003 (FIG. 4 (c) and FIG. 6),
This spread signal SG1003 is output to the pulse generator 1004.

In the pulse generator 1004, the spread signal SG
Corresponding to 0/1 of 1003, a channel signal SG1005 (FIG. 4 (e), FIG. 7), which is a transmission signal that is a very fine pulse signal of 100 ps, for example, is transmitted via the antenna 15.

[Display Device 3] As shown in FIG. 1, the display device 3 is fixed on a pedestal 30. The display device 3 includes, for example, an antenna 21,
It has a UWB receiving circuit 22, a signal processing circuit 23, and an image / audio output circuit 24. Here, the UWB receiving unit 22 corresponds to the receiving circuit of the present invention. Display device 3
Is a flat panel display such as a plasma display or a liquid crystal display.

The antenna 21 receives the channel signal SG1005 transmitted by the tuner device 2 and sends it to the UWB.
Output to the receiving circuit 22.

FIG. 8 is a functional block diagram of the UWB receiving circuit 22. The UWB receiving circuit 22 demodulates a channel signal, which is a reception signal received via the antenna 21, to generate a channel signal SG1608. FIG. 9 corresponds to FIG.
The so-called DLL (Dela of the UWB receiving circuit 22 shown in FIG.
FIG. 3 is a diagram showing a correlation characteristic in a main circuit 1609 of a timing synchronization circuit having a y Lock Loop) configuration.

The channel signal SG1005 transmitted by the UWB transmission circuit 14 shown in FIG. 3 is received by the antenna 21, and the received signal 1601 is output to the bandpass filter 1602. The reception signal 1601 has a multiplier 160 after the unnecessary components are removed by the bandpass filter 1602.
7, 1613, 1610.

The spreading code generator 1604 uses the frequency of the synthesizer 1603 to spread the spreading code sequence (the same spreading code sequence as the spreading code sequence used in the UWB transmission circuit 14 shown in FIG. 3).
Is output to the pulse generator 1605. Pulse generator 16
In 05, a pulse is generated, the spread code sequence output from the spread code generator 1604 is superimposed on the pulse, and the pulse is output to the delay units 1606, 1612 and the multiplier 1610.

The delay unit 1606 delays the pulse on which the spread code sequence is superimposed by ½ pulse width to multiply the multiplier 1607.
Output to. Further, the delay unit 1612 delays the pulse on which the spread code sequence is superimposed by one pulse width to multiply the multiplier 161.
Output to 3.

Accordingly, the multiplier 1607 multiplies the received signal by the pulse for demodulating the transmission data and having the spread code sequence superimposed thereon, and performs the despreading process. Also,
In the multiplier 1610, the output of the delay unit 1606 is 1/2
At the timing preceding the pulse width, the pulse on which the spreading code sequence is superimposed is multiplied by the received signal, and the despreading process is performed. Further, in the multiplier 1613, at the timing delayed by 1/2 pulse width from the output of the delay unit 1606, the pulse on which the spread code sequence is superimposed is multiplied by the received signal, and despreading processing is performed.

The multiplication result of the multiplier 1607 is the integrator 16
08, and is integrated by the integrator 1608 and output to the signal processing circuit 23 as the channel signal SG1608. The multiplication result of the multiplier 1610 is output to the integrator 1611, integrated by the integrator 1611, and output to the difference unit 1615 (1702 in FIG. 9). The multiplication result of the multiplier 1613 is output to the integrator 1614, integrated by the integrator 1614, and output to the difference unit 1615 (170 in FIG. 9).
1).

The difference calculator 1615 takes the difference between the output of the integrator 1611 and the output of the integrator 1614 (1703 in FIG. 9: solid line), and outputs the difference to the loop filter 1616. As can be seen from FIG. 9, the output (vertical axis) linearly responds to the phase shift (horizontal axis). Therefore,
The output (difference) obtained by filtering the difference with the loop filter 1616 is fed back to the synthesizer 1603.

In the synthesizer 1603, if the output of the loop filter 1616 is positive, the generation phase of the spreading code sequence is delayed a little, and if it is negative, the generation phase of the spreading code sequence is advanced a little. As a result, the loop filter 16
The output (difference) of 16 becomes zero, and the pulse of the spread code sequence supplied to the multiplier 1607 and the phase of the received signal are aligned, and the despread output becomes maximum.

The signal processing circuit 23 is a UWB receiving circuit 22.
Input the channel signal SG1608 demodulated from
The image / sound output circuit 24 is controlled using the channel signal SG1608. The signal processing circuit 23 is
When the channel signal SG1608 is encoded by the MPEG system, the channel signal SG1608 is decoded by the MPEG system.

The image / audio output circuit 24, under the control of the signal processing circuit 23, outputs the channel signal SG160.
The image corresponding to 8 is displayed on the display. Also, the image
The audio output circuit 24 outputs audio according to the channel signal SG1608 under the control of the signal processing circuit 23.

Hereinafter, an operation example of the communication system 1 shown in FIG. 1 will be described. First, a television signal transmitted from a transmitter (not shown) is received by the antenna 12 of the tuner device 2 and output to the tuner circuit 13. Next, in the tuner circuit 13, the television signal is converted into a channel signal through the processing of the high frequency amplification circuit 31 and the frequency conversion circuit 32 shown in FIG. 2, and the channel signal SG1001 is converted into UW.
It is output to the B transmission circuit 14. Next, the UWB transmission circuit 1
4, the channel signal SG1001 is modulated into the signal of the ultra wideband impulse communication system by the configuration shown in FIG. 3, and then transmitted to the display device 3 via the antenna 15.

The channel signal of the ultra wideband impulse communication system is received by the antenna 21 of the display device 3 and output to the UWB receiving circuit 22. Next, the channel signal is changed to the UWB receiving circuit 22 having the configuration shown in FIG.
In, the channel signal SG1608 demodulated and obtained by the demodulation is output to the signal processing circuit 23.

Next, the signal processing circuit 23 uses the channel signal SG1608 to output the image / audio output circuit 2
4 is controlled, an image corresponding to the channel signal SG1608 is displayed on the display, and the channel signal SG16
The voice corresponding to 08 is output from the speaker.

As described above, according to the communication system 1, since the channel signal is transmitted from the tuner device 2 to the display device 3 by the ultra wideband impulse communication system, a cable is provided between the tuner device 2 and the display device 3. There is no need to provide it. Therefore, the degree of freedom in arranging the tuner device 2 and the display device 3 is increased, and the appearance is improved. Further, high-speed transmission becomes possible by performing communication between the tuner device 2 and the display device 3 by the ultra-wide band impulse communication system.

Modification of First Embodiment FIG. 10 is an overall configuration diagram of a communication system 1a of the present embodiment related to the modification of the first embodiment described above. Figure 10
As shown in FIG. 1, the communication system 1a includes a tuner device 2a.
And a display device 3a. The tuner device 2a has UWB transmission circuits 14a and 14b and antennas 15a and 15b. In the present embodiment, the case of having two pairs of UWB transmission circuits and antennas is illustrated, but the present invention is also applicable to the case of having three or more pairs of UWB transmission circuits and antennas. Here, the UWB transmission circuits 14a and 14b have basically the same configuration as the UWB transmission unit 14 of the first embodiment described above. Further, the display device 3a includes UWB receiving circuits 22a and 22b.
And antennas 21a and 21b. here,
The UWB receivers 22a and 22b are basically the first described above.
It has the same configuration as the UWB receiving unit 22 of the embodiment.

In the tuner device 2a, the tuner circuit 13
The channel signal generated by a is divided into two, one channel signal obtained by the division is transmitted to the UWB transmitting circuit 14a, and the other channel signal is transmitted to the UWB transmitting circuit 14b. UWB transmission circuits 14a and 14b
Respectively modulates the channel signal and antenna 15
It transmits from a and 15b in parallel. Display device 3
The antennas 21a and 21b of a receive the channel signals and output them in parallel to the UWB receiving circuits 22a and 22b, respectively. The UWB receiving circuit 22a demodulates the corresponding one of the two channel signals obtained by the division and outputs the demodulated signal to the signal processing circuit 23a.
Further, the UWB receiving circuit 22b demodulates the other corresponding channel signal of the two channel signals obtained by the division and outputs the demodulated signal to the signal processing circuit 23a.

In the signal processing circuit 23a, the demodulated channel signals input from the UWB receiving circuits 22a and 22b are combined to generate a new channel signal, and the image / audio output circuit 24 is controlled based on this to generate a new image signal. -The audio output circuit 24 is caused to perform image display and audio display.

As described above, according to the communication system 1a, since the UWB transmitting circuits 14a and 14b and the UWB receiving circuits 22a and 22b are provided, the channel signal generated from the television signal received by the tuner device 2a is It is possible to transmit from the tuner device 2a to the display device 3a at high speed (in a short time) by the ultra-wide band impulse communication system.

Second Embodiment FIG. 11 is an overall configuration diagram of a communication system 101 of this embodiment. As shown in FIG. 11, the communication system 101
Is, for example, via the antennas 15 and 21 a DVD
(Digital Versatile Disk) player 102 and display device 103 communicate with each other by the ultra-wideband impulse communication method described in the first embodiment.

[DVD Player 102] As shown in FIG. 11, the DVD player 102 has, for example, a DVD reproducing circuit 113 and a UWB transmitting circuit 14. The UWB transmission circuit 14 is the same as that described in the first embodiment with reference to FIGS. 3 to 7.

FIG. 12 shows a DVD reproducing circuit 1 shown in FIG.
13 is a functional block diagram of 13. FIG. As shown in FIG.
The VD reproduction circuit 113 has, for example, a disk access circuit 150, a demodulation circuit 151, and an error correction circuit 152. The disk access circuit 150 rotationally drives the DVD disk and outputs a read signal read from the DVD disk to the demodulation circuit 151. The demodulation circuit 151
For example, the read signal input from the disk access circuit 150 is demodulated 8-16 and output to the error correction circuit 152. The error correction circuit 152 performs error correction processing on the demodulated read signal input from the demodulation circuit 151 to generate a reproduction signal SG1001 and outputs the reproduction signal SG1001 to the UWB transmission circuit 14. The UWB transmission circuit 14 uses the reproduction signal SG100.
1 is subjected to the processing described with reference to FIGS.
The reproduction signal SG1001 obtained thereby is transmitted to the display device 103.

[Display Device 103] As shown in FIG. 11, the display device 103 is fixed on the pedestal 30. The display device 103 includes, for example, the antenna 21, the UWB receiving circuit 22, and the signal processing circuit 123.
And an image / audio output circuit 24. The display device 103 is a flat panel display such as a liquid crystal display. Here, the antenna 21, the UWB receiving circuit 22, and the image / audio output circuit 24 are the same as those described in the first embodiment. The antenna 21 receives the reproduction signal transmitted by the DVD player 102 and outputs it to the UWB receiving circuit 22. The UWB receiving circuit 22 performs the processing described in the first embodiment with reference to FIGS. 8 and 9 on the reproduced signal input from the antenna 21, and outputs the resulting reproduced signal SG1608 to the signal processing circuit 123. To do. The signal processing circuit 123 controls the image / audio output circuit 24 using the reproduction signal SG1608.

An operation example of the communication system 101 shown in FIG. 11 will be described below. First, in the DVD reproduction circuit 113, the reproduction processing of the DVD disk is performed by the operation and processing of the disk access circuit 150, the demodulation circuit 151 and the error correction circuit 152 shown in FIG. 12, and the reproduction signal SG1001 is output to the UWB transmission circuit 14. To be done. Next, in the UWB transmission circuit 14, the reproduction signal SG1001 is modulated into a signal of the ultra wideband impulse communication system by the configuration shown in FIG. 3 and then transmitted to the display device 103 via the antenna 15.

The reproduced signal of the ultra wideband impulse communication system is received by the antenna 21 of the display device 103 and output to the UWB receiving circuit 22. Next, the reproduction signal SG is demodulated in the UWB receiving circuit 22 having the configuration shown in FIG. 8, and the reproduction signal SG obtained by the demodulation is reproduced.
1608 is output to the signal processing circuit 123.

Next, in the signal processing circuit 123, the reproduction signal SG1608 is decoded, the image / audio output circuit 24 is controlled according to the result, and the reproduction signal SG160 is reproduced.
The image corresponding to 8 is displayed on the display, and the reproduction signal S
A voice corresponding to G1608 is output from the speaker.

As described above, the communication system 101
According to this, since the channel signal is transmitted from the DVD player 102 to the display device 103 by the ultra-wideband impulse communication system, it is not necessary to provide a cable between the DVD player 102 and the display device 103.
Therefore, the degree of freedom in arranging the DVD player 102 and the display device 103 is increased, and the appearance is improved.

Third Embodiment FIG. 13 is an overall configuration diagram of a communication system 201 of this embodiment. As shown in FIG.
For example, the camcorder 202 and the display device 3 communicate with each other via the antennas 15 and 21 by the ultra-wideband impulse communication method described in the first embodiment.

[Camcoder 202] As shown in FIG. 13, the camcorder 202 has, for example, a video tape reproducing circuit 213 and a UWB transmitting circuit 14. The UWB transmission circuit 14 is the same as that described in the first embodiment with reference to FIGS. 3 to 7.

The video tape reproducing circuit 213 reads out and reproduces the data which is picked up by the image pick-up unit (not shown) and recorded on the video tape, and outputs the reproduction signal SG1001 as U.
It is output to the WB transmission unit 14. The UWB transmission circuit 14 performs the processing described with reference to FIGS. 3 to 7 on the reproduction signal SG1001, and the reproduction signal SG1 obtained thereby is obtained.
001 is transmitted to the display device 3.

[Display Device 3] As shown in FIG. 13, the display device 3 is fixed on the pedestal 30. The display device 3 includes, for example, an antenna 21,
It has a UWB receiving circuit 22, a signal processing circuit 23, and an image / audio output circuit 24. The display device 3 is a flat panel display such as liquid crystal, and is the same as that described in the first embodiment, for example.

Hereinafter, an operation example of the communication system 201 shown in FIG. 13 will be described. First, in the video tape reproducing circuit 213 of the camcorder 202, the data recorded on the video tape at the time of imaging is read and reproduced, and the reproduction signal S
G1001 is output to the UWB transmitter 14. Then U
In the WB transmission circuit 14, the configuration shown in FIG.
The reproduction signal SG1001 is transmitted to the display device 3 via the antenna 15 after being modulated into a signal of the ultra wideband impulse communication system.

The reproduced signal of the ultra wideband impulse communication system is received by the antenna 21 of the display device 3,
It is output to the UWB receiving circuit 22. Next, the reproduced signal is demodulated in the UWB receiving circuit 22 having the configuration shown in FIG. 8, and the reproduced signal SG160 obtained by the demodulation is reproduced.
8 is output to the signal processing circuit 23.

Next, in the signal processing circuit 23, the reproduction signal SG1608 is used to control the image / sound output circuit 24, an image corresponding to the reproduction signal SG1608 is displayed on the display, and a sound according to the reproduction signal SG1608 is generated. It is output from the speaker.

As described above, the communication system 201
According to this, since the channel signal is transmitted from the camcorder 202 to the display device 3 by the ultra-wideband impulse communication system, it is not necessary to provide a cable between the camcorder 202 and the display device 3. Therefore, the degree of freedom in arranging the camcorder 202 and the display device 3 is increased and the appearance is improved.

Fourth Embodiment FIG. 14 is an overall configuration diagram of a communication system 301 of this embodiment. As shown in FIG. 14, the communication system 301
For example, the personal computer 302 and the display device 3 communicate with each other via the antennas 15 and 21 by the ultra-wideband impulse communication method described in the first embodiment.

[Personal Computer 302] FIG. 14
As shown in, the personal computer 302 has, for example, a PC processing unit 313 and a UWB transmission circuit 14. The UWB transmission circuit 14 is the same as that described in the first embodiment with reference to FIGS. 3 to 7.

The PC processing unit 313 has the functions of an ordinary personal computer such as a CPU, a memory, and a bus, and outputs a data signal SG1001 generated by performing data processing to the UWB transmitting unit 14. The UWB transmission unit 14 performs the processing described with reference to FIGS. 3 to 7 on the signal SG1001 and transmits the signal SG1005 obtained by the processing to the display device 3.

[Display Device 3] As shown in FIG. 14, the display device 3 is fixed on the pedestal 30. The display device 3 includes, for example, an antenna 21,
UWB receiving circuit 22, signal processing circuit 323 and image
It has an audio output circuit 24. The signal processing circuit 323 is U
The display and audio output of the image / audio output circuit 24 are controlled based on the data demodulated by the WB receiving unit 22.
The display device 3 is a flat panel display such as liquid crystal, and is the same as that described in the first embodiment, for example.

Hereinafter, an operation example of the communication system 301 shown in FIG. 14 will be described. First, the personal computer 30
The signal SG1001 of the data generated in the second PC processing unit 313 is output to the UWB transmission unit 14. next,
In the UWB transmission circuit 14, the signal SG1001 is modulated into a signal of the ultra wideband impulse communication system by the configuration shown in FIG. 3 and then transmitted to the display device 3 via the antenna 15.

The signal of the ultra wideband impulse communication system is received by the antenna 21 of the display device 3, and U
It is output to the WB receiving circuit 22. Next, the signal is demodulated in the UWB receiving circuit 22 having the configuration shown in FIG. 8, and the signal SG1608 obtained by the demodulation is output to the signal processing circuit 23.

Next, in the signal processing circuit 23, the signal S
The image / sound output circuit 24 is controlled using G1608, the image corresponding to the signal SG1608 is displayed on the display, and the sound corresponding to the signal SG1608 is output from the speaker.

As described above, the communication system 301
According to this, since the channel signal is transmitted from the personal computer 302 to the display device 3 by the ultra-wideband impulse communication system, it is not necessary to provide a cable between the personal computer 302 and the display device 3. Therefore, the degree of freedom in arranging the personal computer 302 and the display device 3 is increased, and
It looks good.

[0075]

As described above, according to the present invention,
It is possible to provide a communication system and its method, which can increase the degree of freedom of the installation location of the device and have a good appearance, a display device, a tuner device, an optical disk device, an imaging device, and a data processing device.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a communication system according to a first embodiment of the present invention.

FIG. 2 is a functional block diagram of the tuner circuit shown in FIG.

FIG. 3 is a functional block diagram of the UWB transmission circuit shown in FIG.

4 is a diagram showing a signal waveform in each circuit of the UWB transmission circuit shown in FIG.

5 is a diagram showing a signal spectrum of a data sequence in the UWB transmission circuit shown in FIG.

6 is a diagram showing a signal spectrum of a spread signal in the UWB transmission circuit shown in FIG.

FIG. 7 is a diagram showing a signal spectrum output from the UWB transmission circuit shown in FIG.

FIG. 8 is a functional block diagram of the UWB receiving circuit shown in FIG.

9 is a diagram showing a correlation characteristic in a main circuit of a timing synchronization circuit having a so-called DLL (Delay Lock Loop) configuration of the UWB receiving circuit shown in FIG. 8;

FIG. 10 is an overall configuration diagram of a communication system of the present embodiment according to a modification of the first embodiment.

FIG. 11 is an overall configuration diagram of a communication system according to a second embodiment of the present invention.

FIG. 12 is a functional block diagram of the DVD reproducing unit shown in FIG. 11.

FIG. 13 is an overall configuration diagram of a communication system according to a third embodiment of the present invention.

FIG. 14 is an overall configuration diagram of a communication system according to a fourth embodiment of the present invention.

FIG. 15 is an overall configuration diagram of a conventional television system.

[Explanation of symbols]

1, 1a, 101, 201, 301 ... communication system,
2, 2a ... Tuner device, 3, 3a ... Display device, 12, 13, 15, 21 ... Antenna, 14, 14a
... UWB transmitter, 22, 22a ... UWB receiver, 23,
23a ... Signal processing unit, 24 ... Image / audio output circuit

Continued front page    (72) Inventor Masateru Akabane             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation (72) Inventor Jun Iwasaki             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation (72) Inventor Shigeru Sugaya             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation (72) Inventor Hisato Asai             6-735 Kita-Shinagawa, Shinagawa-ku, Tokyo Soni             -Inside the corporation F-term (reference) 5K022 EE02 EE22 EE32

Claims (20)

[Claims] 1. A tuner device for extracting a designated channel signal from a received signal, and a display device for displaying an image using the channel signal, wherein the tuner device transmits the channel signal to ultra wideband impulse communication. A transmission circuit that modulates according to a method and transmits to the display device, the display device receives the channel signal transmitted by the transmission circuit,
A communication system having a receiving circuit for demodulating the received channel signal according to the ultra wideband impulse communication system. 2. The communication system according to claim 1, wherein the display device is a flat panel display. 3. The transmission circuit includes: a spreading code generation circuit for generating a signal of a predetermined spreading code sequence; a multiplication circuit for multiplying the channel signal by the signal of the spreading code sequence; and a multiplication circuit obtained by the multiplication. A pulse generating circuit for generating a pulse signal having a predetermined cycle corresponding to a signal level, wherein the receiving circuit performs an inverse spreading process on the received channel signal using the same signal as the spreading code sequence. The communication system according to claim 1, further comprising a spreading processing circuit and an integrating circuit that performs integration processing on a signal obtained by the despreading processing. 4. The tuner device includes a plurality of transmission circuits, divides the channel signal and transmits the channel signals in parallel via the plurality of transmission circuits, and the display device includes a plurality of transmission circuits. 2. The display device according to claim 1, further comprising a plurality of receiving circuits corresponding to, combining the plurality of channel signals respectively demodulated by the plurality of receiving circuits, and using the channel signals obtained by the combining. Communication system. 5. The communication system according to claim 1, wherein the display device outputs an audio by using the channel signal. 6. A tuner device for extracting a designated channel signal from a received signal, the tuner device having a transmission circuit for modulating the channel signal according to a predetermined wireless communication system and transmitting the modulated signal to a display device. 7. A display device for displaying an image using a channel signal, which receives a channel signal transmitted from a tuner device,
A display device comprising: a reception circuit that demodulates the received channel signal according to a predetermined wireless communication system, and a signal processing circuit that performs display control using the demodulated channel signal. 8. An optical disc reproducing device for reproducing an optical disc to generate a reproducing signal, and a display device for displaying an image using the reproducing signal, wherein the optical disc reproducing device transmits the reproduced signal to an ultra wideband impulse. It has a transmission circuit which modulates according to a communication system and transmits to the display device, the display device receives the reproduction signal transmitted by the transmission circuit, and the received reproduction signal is the ultra-wideband impulse communication. A communication system having a receiving circuit that demodulates according to a method. 9. An optical disk reproducing apparatus for reproducing an optical disk to generate a reproduction signal, the optical disk reproducing apparatus having a transmission circuit for modulating the reproduction signal in accordance with a predetermined wireless communication system and transmitting the modulated signal to a display device. 10. A display device for displaying an image using a reproduction signal, the reception device receiving a reproduction signal transmitted by an optical disk reproduction device and demodulating the received reproduction signal according to a predetermined wireless communication system. A display device comprising: a circuit; and a signal processing circuit that performs display control using the demodulated reproduced signal. 11. A captured image signal is recorded on a recording medium,
The image pickup apparatus includes an image pickup apparatus that reproduces an image signal read from the recording medium to generate a reproduced signal, and a display apparatus that displays an image by using the reproduced signal. It has a transmission circuit which modulates according to a communication system and transmits to the display device, the display device receives the reproduction signal transmitted by the transmission circuit, and the received reproduction signal is the ultra-wideband impulse communication. A communication system having a receiving circuit that demodulates according to a method. 12. A captured image signal is recorded on a recording medium,
An imaging device that reproduces an image signal read from the recording medium to generate a reproduction signal, the imaging device having a transmission circuit that modulates the reproduction signal according to a predetermined wireless communication system and transmits the modulated reproduction signal to a display device. 13. A display device for displaying an image using a reproduction signal, the receiving circuit receiving a reproduction signal transmitted by an imaging device and demodulating the received reproduction signal according to a predetermined wireless communication system. And a signal processing circuit that performs display control using the demodulated reproduction signal. 14. A data processing device for performing data processing, and a display device for displaying an image using the data generated by the data processing, wherein the data processing device is data generated by the data processing. , Having a transmission circuit that modulates according to an ultra-wide band impulse communication system and transmits to the display device, the display device receives a signal transmitted by the transmission circuit, the received signal is the ultra-wide band impulse A communication system having a receiving circuit that obtains the data by demodulating according to a communication system. 15. A data processing device for performing data processing, the data processing device having a transmission circuit for modulating the data generated by the data processing according to a predetermined wireless communication system and transmitting the modulated data to a display device. 16. A receiving circuit that receives a signal transmitted by a data processing device and demodulates the received signal according to a predetermined wireless communication system, and a signal processing circuit that performs display control based on the demodulated signal. And a display device having. 17. A communication method for performing communication using a tuner device for extracting a designated channel signal from a received signal and a display device for displaying an image using the channel signal, the tuner device comprising: The channel signal is modulated according to an ultra-wideband impulse communication system and transmitted to the display device, the display device receives the channel signal, and the received channel signal according to the ultra-wideband impulse communication system. A communication method of demodulating and displaying according to the demodulated channel signal. 18. A communication method for performing communication using an optical disc reproducing device for reproducing an optical disc to generate a reproducing signal and a display device for displaying an image using the reproducing signal, wherein the optical disc reproducing device is , The reproduction signal is modulated according to an ultra-wideband impulse communication system and transmitted to the display device, the display device receives the reproduction signal, and the received reproduction signal according to the ultra-wideband impulse communication system. A communication method of demodulating and demodulating and displaying according to the demodulated reproduction signal. 19. A captured image signal is recorded on a recording medium,
A communication method using an imaging device that reproduces an image signal read from the recording medium to generate a reproduction signal, wherein the imaging device modulates the reproduction signal in accordance with an ultra-wideband impulse communication system. Communication for transmitting to a display device, the display device receiving the reproduction signal, demodulating the received reproduction signal according to the ultra wideband impulse communication system, and performing display according to the demodulated reproduction signal Method. 20. A communication method for performing communication using a data processing device for performing data processing and a display device for displaying an image using the data generated by the data processing, wherein the data processing device comprises: The signal of the generated data is modulated according to an ultra wide band impulse communication system and transmitted to the display device, the display device receives the signal, and the received signal is in the ultra wide band impulse communication system. A communication method of performing demodulation according to the above and displaying according to the demodulated signal.