JP2944604B2 - Radio mobile station and image receiving system having the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image display system using a radio mobile station, and more particularly, to an image display system using a radio mobile station communicating wirelessly via a base station.

[0002]

2. Description of the Related Art PDC (Personal Digital Celer), which is known as a standard system of digital mobile phones in Japan in the past.
Digital image data can be transmitted by using a digital data transmission function in a PHS (Personal Handyphone System) known as a method of a portable telephone or a portable telephone.

For example, in the PDC system, the transmission rate of digital data is 9.6 KBPS, and in the PHS, it is 32 KBPS, so that the transmission rate is 32 KBP.
Although it is not possible to transmit a moving image based on the MPEG1 standard of S, it is possible to transmit still image digital data.

[0004] In addition, the IMT-2000 (International standard), a global standard for next-generation (third generation) digital mobile communication.
nal Mobile Telecommunication 2000), W-CDMA (Wideband Code Division Multiple Ac)
cess), digital data communication at a transfer rate of 2.048 MBPS is possible. Therefore, for example, MPEG1 or MP with a transmission rate of several MBPS
It is possible to transmit EG2 type moving image data.

In the next-generation PHS system, 25 to 30
It is planned that digital data communication with MBPS will be possible.
It becomes possible to transmit moving image data such as the PEG2 system.

Accordingly, a wireless mobile communication terminal (wireless mobile station) having a function of receiving still image data or moving image data and displaying an image such as a still image or moving image based on the data is emerging. is there.

[0007] Therefore, as shown in FIG.
Image display device 4 attached to an image display device
Can be considered. The image display device 4 is connected to the wireless mobile station 3 via a connection line 5. The wireless mobile station 3 includes an antenna 31,
An antenna resonator 32, a receiving unit 33, a transmitting unit 34, a control unit 35, a transmitter 36, a receiver 37, and a speaker 38 connected to the control unit 35 are provided. The image display device 4 includes an image data processing unit 41 and a display 42.
It has. Then, the image data processing unit 41 of the image display device 4 is connected to the control unit 35 of the wireless mobile station 3 via the connection line 5.
When the control unit 35 of the wireless mobile station 3 detects an image signal, the control unit 35 outputs the image signal to the connection line 5 and outputs the image signal to the image data processing unit of the image display device 4. 41 processes the image data, and the display 42 of the image display device 4 displays the processed image data. .

[0008]

However, in such a configuration of the image display device 4, the connector 51 connected to the connection line 5 connecting the image display device 4 is connected to the wireless mobile station 3.
Therefore, it is necessary to secure the installation space in the wireless mobile station 3, which is an obstacle to downsizing the wireless mobile station 3.

Further, the image display device 4 cannot be connected to the radio mobile station 3 not provided with such a connector, and the radio mobile station 3 which intends to use this type of image display device 4 cannot be connected. There is a problem that models are limited.

Further, since the maximum distance between the radio mobile station 3 and the image display device 4 is determined by the length of the connection line 5, its use is restricted, and when the radio mobile station 3 is separated from the radio mobile station 3, an image is displayed. The display device 4 cannot be used,
There is also the problem of lack of convenience.

Accordingly, the present invention provides an image display apparatus which can reduce the restriction on the distance between a radio mobile station and an image display apparatus, and can display an image even when the image display apparatus is located away from the radio mobile station. The purpose is to provide a system.

It is another object of the present invention to provide an image display method and an image display device system capable of displaying an image without restricting the model of the wireless mobile station.

Still another object of the present invention is to provide an image display method and an image display device system which can display an image without providing a connector in a wireless mobile station.

[0014]

According to the present invention, there is provided an image display system, comprising: communication means for communicating with a base station; and when data including image data is received, the data including the image data is incorporated into a signal of a predetermined format. A wireless mobile station including an incorporation unit, a modulation unit that modulates the signal of the predetermined format to generate a modulation signal, a transmission unit that transmits the modulation signal, a reception unit that receives the modulation signal, and a reception unit. Demodulating means for demodulating the modulated signal to generate a demodulated signal, decoding means for decoding the demodulated signal to generate data including the image data, and an image for obtaining the image data from the data including the image data An image display device includes a data processing unit and a display unit that displays an image based on the image data.

Further, an image display system according to the present invention comprises:
In the above-described image display system, the incorporation means includes means for time-compressing data including the image data, and means for inserting a synchronization signal and an image display device identifier.

Further, the image display system according to the present invention comprises:
Communication means for communicating with the base station, extraction means for extracting data including image data when receiving data including image data, and modulation means for modulating data including the image data to generate a modulation signal; A radio mobile station comprising a transmitting means for transmitting the modulated signal, a receiving means for receiving the modulated signal, a demodulating means for demodulating the received modulated signal to generate a demodulated signal, and decoding the demodulated signal Decoding means for generating data including the image data, image data processing means for obtaining the image data from the data including the image data, and display means for displaying an image based on the image data And a display device.

Further, the image display system according to the present invention comprises:
In the above image display system, the modulation unit modulates the image display device by adding information unique to the image display device.

Further, the image display system according to the present invention comprises:
In the above image display system, the modulation signal conforms to a communication format with the base station.

Further, the image display system according to the present invention comprises:
In the above image display system, the communication format is a W-CDMA format.

[0020]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 of the present invention will be described with reference to the drawings.

FIG. 1 is a diagram showing a configuration of an image display system using a wireless mobile station according to the present embodiment. In the figure, the image display system includes a wireless mobile station 1 and an image display device 2. Image data is wirelessly transmitted from the wireless mobile station 1 to the image display device 2.

FIG. 2 is a block diagram showing the configuration of the radio mobile station 1, and FIG. 3 is a block diagram showing the configuration of the image display device 2.

Referring to FIG. 2, radio mobile station 1 includes an antenna 11 for receiving a radio wave from a base station (not shown), an antenna resonator 12, a receiving section 13 for demodulating a received modulated wave, and a transmitting section. A transmitter 14 for modulating data and a controller 15 for controlling each part of the wireless mobile station 1 are provided.
6, a receiver 17 for converting a voice into a voice signal, an operation button 18 for receiving a user's operation, various switches 19 such as a power switch, a display 110 for displaying a state of the wireless mobile station 1, a telephone number, transmission / reception data, and the like. An LED 111 that blinks according to the state of the wireless mobile station 1 and the like, and a speaker 112 that notifies an incoming call by sound are connected.

On the other hand, referring to FIG.
Are a small antenna 21 for receiving a radio wave transmitted from the wireless mobile station 1, a receiver 22 for demodulating the radio wave received by the small antenna 21, and a signal demodulated by the receiver 22 to decode image data and the like. 23 that obtains a decoded signal of
An image data processing unit 24 for processing image data decoded by the decoder 23; and a display 25 for displaying images.
And

When the radio mobile station 1 receives a radio wave from the base station, the receiving unit 13 demodulates the received radio wave, and the control unit 1
At 5, the demodulated signal is decoded. The reception signal is modulated by the transmission unit 14 and transmitted to the image display device 2. When this image signal is transmitted from the wireless mobile station 1, the image display device 2 receives the signal with the small antenna 21, demodulates the received signal with the receiver 22, and
3, and the image data included in the decoded signal is extracted. Then, the image data is output to the display 25.

FIG. 4 is a flowchart showing the operation of the control unit 15. The operation of the control unit 15 will be described with reference to FIG.

When the power is turned on, in step S101, the process waits until communication is started by calling or receiving a call. When the communication is started, the process proceeds to step S102,
It is determined whether image data has been received. If it is determined that image data has been received, step S103
Otherwise, to step S105.

In step S103, the image data is transmitted to the image display device 2. If one unit of image data transmission is completed in step S103, the process proceeds to step S104, and it is determined whether the communication is terminated by disconnection of the communication partner or operation of the user. If it is determined that the communication is to be ended, the process returns to step S101; otherwise, the process returns to step S102.

[0029] In step S105, the step S 103
Are performed, the process proceeds to step 106, and in step S106, it is determined whether to end the communication. If it is determined that the communication is to be ended, step S1
01, otherwise returning to step S102.

FIG. 5 is a diagram showing the relationship between received data and transmitted image data. Since the control unit 15 performs the above operation, the image data is transmitted from the wireless mobile station 1 to the image display device 2 only when the received data is image data.

FIG. 6 is a diagram showing a format example of transmission image data.

FIG. 6A shows an example of a format in which a synchronization signal, an image display device ID, and other information are added to a received image data stream. The reason for adding the image display device ID is to prevent an image display device other than the image display device used by the user from displaying an image. FIG.
(B) is a format example in which parity for error detection / correction is further added. By adding the parity, it is possible to reduce the deterioration of the communication quality due to the transmission error. FIG. 6C shows a format in which the received image data stream is used as it is. Even in this format, for example, by adding a modulation by a specific M-sequence signal depending on the pair of each wireless mobile station 1 and the image display device 2, it is possible to prevent other image display devices from receiving the signal. .

FIG. 7 is a block diagram of a circuit for generating a signal of the format shown in FIG. 6A from the received image data stream. In the figure, reference numeral 30 denotes a FIFO for temporally compressing a received image data stream;
Is a synchronizing signal generator, 32 is an image display device ID generator, 33 and 34 are buffers, and 35 is a multiplexer (M
UX) and 36 are timing control means for controlling output timings of the FIFO 30, the buffer 33, and the buffer.

Data transmitted from the wireless mobile station 1 to the image display device 2 is modulated by a method such as PSK.
At this time, the carrier frequency is, for example, an FM band,
It is selected from the VHF band and the UHF band. Therefore, in general, there must be two transmission units 14.

However, the received image data is included in a signal transmitted from the radio mobile station 1 to the base station, and the transmission signal (up signal) is received by the image display device 2, so that the number of transmission units 14 is one. However, the image based on the image data received by the image display device 2 can be displayed while the communication between the wireless mobile station 1 and the base station is continued. In this case, communication between the wireless mobile station 1 and the image display device 2 is performed by the wireless mobile station 1
Since communication is performed at a shorter distance than communication with the base station, cost reduction can be achieved by eliminating the configuration for improving the C / N (Carrier to Noise ratio) of the receiver 22. Note that the wireless mobile station 1 is, for example,
It is possible to support a CDMA system such as DMA. In this case, the cost increase R
The AKE receiving unit can be excluded from the receiver 22 of the image display device 2.

According to the present embodiment, since the screen display device 2 and the wireless mobile station 1 communicate wirelessly, the image display device 2 can be used even by the wireless mobile station 1 having no connector. There is no restriction on the model of the wireless mobile station 1, and since there is no signal line connecting the wireless mobile station 1 and the image display device 2, the image display device 2
Can be separated from the wireless mobile station 1, and there is no trouble in handling it.

[0037]

As described above, according to the present invention, since the image display device is formed separately from the radio mobile station, the convenience in using the image display device is high. In addition, the image display device can be used even by a wireless mobile station having no connector, and there is no restriction on the model of the wireless mobile station.

[Brief description of the drawings]

FIG. 1 is an image display system using a wireless mobile station according to an embodiment of the present invention.

FIG. 2 is a wireless mobile station according to an embodiment of the present invention.

FIG. 3 is an image display device according to an embodiment of the present invention.

FIG. 4 is a flowchart showing an operation of a control unit of the wireless mobile station according to the embodiment of the present invention.

FIG. 5 is a diagram illustrating operation timings of the wireless mobile station according to the embodiment of the present invention.

FIG. 6 is a format diagram of transmission image data according to the embodiment of the present invention.

FIG. 7 is a block diagram of a circuit for inserting a synchronization signal and an image display device ID into image data according to an embodiment of the present invention.

FIG. 8 is an image display system using a wireless mobile station according to a conventional example.

[Explanation of symbols]

 Reference Signs List 1 wireless mobile station 2 image display device 11, 21 antenna 12 antenna resonator 13 reception unit 14 transmission unit 15 control unit 22 receiver 23 decoder 24 image data processing unit 25 display

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int.Cl. ⁶ , DB name) H04B 7/24-7/26 H04Q 7/00-7/38 H04J 13/00-13/06 H04N 7 / 00-7/15

Claims (3)

(57) [Claims] A wireless mobile station that receives a downlink signal corresponding to a CDMA system from a base station and transmits an uplink signal corresponding to the CDMA system to the base station, wherein the data in the downlink signal is If it is image data ,
A wireless mobile station comprising means for extracting image data from the downlink signal and inserting the image data into the uplink signal. 2. An image display apparatus comprising: the wireless mobile station according to claim 1; and an image display device including means for receiving the image data in an uplink signal corresponding to a CDMA system transmitted by the wireless mobile station. Characteristic image receiving system. 3. An image display device comprising means for receiving image data in an uplink signal corresponding to a CDMA system transmitted by the wireless mobile station according to claim 1 .