JPH1198468A - Information communication terminal equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a moving image with high image quality by receiving moving image data regardless of a small communication capacity. SOLUTION: While character graphics data for a menu image are sent and displayed, the transmission of moving image data with a degraded frame rate (frame number per second) than a usual rate is started, and a user side information terminal equipment stores the moving image data once to a RAM 27, and after the storage of the moving image data with a prescribed amount is finished, the data are read from the RAM 27 and reproduced continuously. Thus, even in the case that the communication capacity is not applicable to moving image communication in real time, the moving image data are transmitted and the moving image is continuously displayed in the reproduction of the moving image.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an information communication terminal in image communication.

[0002]

2. Description of the Related Art In recent years, ITU-T has developed a communication video encoding system for audiovisual services, and
Multiplexing systems and communication procedures have been officially recommended, and accordingly, various companies have released image communication terminal devices such as video conference systems and moving picture videophones conforming to the ITU-T recommendations.

[0003] Information obtained by the user includes characters and graphics, but as a trend in recent years, there has been an increase in information that provides not only characters but also vivid natural images and moving images at the same time as character and graphics data. Accordingly, it has become necessary for terminals to have display means with more display colors and higher resolution.

[0004]

However, in such conventional image communication, a user selects whether to obtain moving image information or text / graphics data communication, and when obtaining moving image information, When a video transmission request operation is performed, a video transmission request is made to the information distribution center side, and the information distribution center has started communication of video data according to the video transmission request, but if the communication capacity is limited, There has been a problem that high-quality moving images cannot be transmitted in real time, and high-quality moving images cannot be displayed.

An object of the present invention is to provide an information communication terminal capable of receiving moving image data and displaying a high-quality moving image even with a small communication capacity.

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention temporarily stores received data including moving image data in a memory, and stores the data from the memory after a predetermined amount of moving image data is completely stored. The video data is read out, video data is extracted from the data, and the video data is continuously reproduced, so that the video data to be received has a lower frame rate (the number of frames per second) than usual. However, at the time of reproduction, the moving image can be reproduced continuously.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An invention according to claim 1 of the present invention provides a high-frequency circuit for communicating with a wireless communication network, and a PIAFS signal which is a received data stream from a signal converted into a baseband signal by the high-frequency circuit. Baseband processing means for separating the image data from other signals, a communication protocol control means for extracting image data from a PIAFS signal output from the baseband processing means, and a memory capable of storing the image data output from the communication protocol control means An information communication terminal comprising: an image decoding unit that decodes image data read from a memory; and a color display that displays an image decoded by the image decoding unit as a moving image. When playing back moving images, read out the moving image data from the memory at the regular frame rate and play back high-quality moving images. Can be, upon reception of the video data may be received video data regardless of the communication capacity.

(Embodiment 1) FIG. 1 is a block diagram of an information communication terminal according to an embodiment of the present invention. Data communication with another terminal device, a database owned by an information provider, a telephone, etc. Voice communication can be performed. In FIG. 1, reference numeral 1 denotes an input / output unit for characters and graphics, reference numeral 2 denotes a touch panel input device, and reference numeral 3 denotes a monochrome liquid crystal display arranged so as to overlap the touch panel input device. Reference numeral 4 denotes a backlight for the monochrome liquid crystal display 3.

Reference numeral 5 denotes a monochrome LCD interface having a decoding function for decoding character / graphics information. The monochrome LCD interface 5 to which the character / graphics encoded data is input performs a decoding process and outputs character / graphics decoded data. 6
Are operation keys operated by the user.

Reference numeral 8 denotes an antenna. Reference numeral 9 denotes an RF module (high-frequency circuit) that converts baseband data into a radio frequency signal and transmits the signal from the antenna 8, and converts a radio frequency signal received by the antenna 8 into baseband data. In the baseband data output from the RF module, character / graphics data, moving image data, and a digital audio signal are multiplexed. Reference numeral 11 denotes a baseband processing unit having a function of separating character / graphics data, a digital audio signal, and a PIAFS (bearer communication) signal from the baseband data.

Reference numeral 13 denotes communication protocol control means for controlling the protocol of the PIAFS communication. The communication protocol control means 13 includes
(PIAFS) signal separated by the above, and data is extracted from the signal and output. Reference numeral 14 denotes a bus for exchanging data between the units. When the image data is sent from the communication partner, the image data is H2
The image data output from the communication protocol control means 13 to the bus 14 is encoded in the H.63 format. 263
This is coded image data of the system.

Reference numeral 15 denotes a video decoder. The video decoder 15 is H.264. H.263 encoded image data,
A video decoding process is performed to output decoded digital video data. Reference numeral 16 denotes a color LCD interface having a D / A converter function for converting data output from the video decoder 15 into analog data. 17 is a color liquid crystal display. Digital video data decoded by the video decoder 15 is a color LCD.
The analog video signal that has been converted into an analog signal at the interface 16 and output is displayed on the color liquid crystal display 17.

Reference numeral 19 denotes a microphone for inputting voice, and reference numeral 20 denotes a speaker for sounding a received voice.
An audio interface 21 includes an audio circuit for performing processing such as amplification of a transmission audio signal and an audio circuit for performing processing such as amplification of a received audio signal. An AD / DA converter 22 includes an A / D converter for converting an audio signal to be transmitted into digital data and a D / A converter for converting a received digital digital audio signal into an analog signal. Reference numeral 23 denotes a decoder function for decoding received data coded according to the G.723 standard and an audio signal to be transmitted.
It is an encoding processing unit having an encoder function for encoding in the 723 system. These microphone 19 and speaker 2
0, audio interface 21, AD / DA converter 2
2. The encoding processing unit 23 is for decoding the received digital audio signal and reproducing analog audio when the apparatus is used as a mobile phone.

Reference numeral 24 denotes a ring waveform memory storing waveform data of various ring sounds, and 25 denotes a ringer for generating ring sounds.

Reference numeral 26 denotes a CPU for controlling the operation of the information communication terminal. A random access memory (RAM) 27 inputs and outputs various data via the bus 14 and stores the data. The received data sent from the communication partner and output from the baseband processing unit 11 is also input to the RAM 27 via the bus 14 and stored. Reference numeral 28 denotes a ROM (Read Only Memory) which stores program data for operating the CPU and various control data.
Output data via.

Reference numeral 29 denotes a detachable flash memory, which can be attached and write data when necessary. Reference numeral 30 denotes a PIAFS interface for exchanging a PIAFS signal with an external device.

Reference numeral 31 denotes a battery for supplying power to the information communication terminal, and reference numeral 32 denotes a DC-DC converter for converting the voltage of the battery 31 to a voltage required for each unit. 33 is battery 3
A charging circuit 34 for supplying a charging current to 1 is a coil for receiving power from the charger side for non-contact charging. Reference numeral 35 denotes a coil provided in the charger for supplying power to the information communication terminal for non-contact charging, and reference numeral 36 denotes a charging device for supplying an alternating current to the coil 35.

When used as a mobile terminal, the digital audio signal is separated by the baseband processing means 11, and the digital digital audio signal output from the baseband processing means 11 is decoded by the encoding processing section 23. Then, the signal is converted into an analog signal by the audio interface 21, amplified, and output from the speaker 20.

On the voice transmitting side when used as a portable telephone, the voice of the user is converted into an electric signal by the microphone 19, amplified by the voice interface 21 and converted into a digital signal. Sent to

FIG. 2 is a diagram showing the appearance of a specific terminal. The housing is large enough to be held by one hand by a person, and a monochrome liquid crystal display 3, a color liquid crystal display 17, a speaker 20, and operation keys 6 with a touch panel are arranged on the front of the housing. The antenna 8 is provided on the back of the housing, and the microphone 19 is provided on the back of the housing. The user sees the menu screen displayed on the monochrome liquid crystal display 3, listens to the voice guidance emitted from the speaker 20, and operates the touch panel 2 to transmit various signals to the information distribution center.

The data flow when operating as a mobile terminal will be described. The received radio wave is converted into baseband data by the RF module 9 and separated into character / graphics data, a digital audio signal, and a PIAFS (bearer communication) signal by the baseband processing unit 11.

The character / graphics encoded data separated by the baseband processing means 11 is sent to the monochrome LCD interface 5 via the bus 14.
The monochrome LCD interface 5 to which the coded data is input performs a decoding process and outputs character / graphics data. Monochrome LCD interface 5
Is output to the monochrome liquid crystal display 3 and displayed. When storing the received data, the coded data output from the baseband processing means 11 is stored in the RAM 27 via the bus 14.

When transmitting various commands or data to the outside, data input by operating the touch panel input device 2 is transmitted to the baseband processing means 11 via the bus 14 and transmitted.

The sound reproduction when operating as a mobile terminal is as follows. In this case, the digital audio signal is included in the reception data output from the baseband processing means 11 and is temporarily stored in the RAM 27 via the bus 14. The digital audio signal is appropriately read from the RAM 27, input to the encoding processing unit 23 via the bus 14, and decoded by the encoding processing unit 23. And D
Is converted into an analog signal by a / A converter 24,
The signal is amplified by the audio circuit 25 and output from the speaker 20.

At the time of reproducing a moving image, the encoded image data is read from the RAM 27 and sent to the moving image decoder 15 via the bus 14. The moving image decoder 15 to which the encoded data of the moving image is input performs a decoding process and outputs digital video data. This digital video data is AD / D
The analog video signal that has been converted into an analog signal by the A conversion unit 22 and output is displayed on the color liquid crystal display 17.

FIG. 3 is a sequence chart showing communication between the information communication terminal of the present invention and an information distribution center via a communication network using the present apparatus as a mobile terminal. The information distribution center multiplexes the PIAFS signal, character / graphics coded data, voice data, control data, and the like, and transmits the multiplexed data via a wireless communication network.

In FIG. 3, first, when the user of the information communication terminal operates the information communication terminal and makes a dial call to call the information distribution center, the communication line network calls the other information distribution center. A signal is sent. When the information distribution center responds to the incoming call, the communication network connects the lines.

When the user operates an information provision request at the information communication terminal, the information distribution center that receives the information provision request transmits initial menu screen data (characters and graphics),
Transmit voice data for voice guidance. The information communication terminal that has received these data displays the initial menu screen on the monochrome liquid crystal display 3 and starts the voice guidance reproduction operation, and the voice guidance is reproduced from the speaker 20.

The user listens to the voice guidance while watching the initial menu screen displayed on the monochrome liquid crystal display 3, and
Consider which menu to select.

When the user selects a menu, the information communication terminal requests the information distribution center to transmit a moving image. The information distribution center starts transmitting the moving image data selected in response to the moving image transmission request. After requesting the transmission of the moving image, the information communication terminal prepares for storing the next data transmitted from the information distribution center in the RAM 27.

The data transmitted from the information distribution center is stored and accumulated in the RAM 27 before being separated by the baseband processing means 11.

When a predetermined amount of moving image data is stored in the RAM 27, the moving image can be reproduced. When the required amount of moving image data has been received, the moving image data is read from the RAM 27, sent to the color liquid crystal display 17, and reproduced on the color liquid crystal display 17. At this time, the moving image data is read from the RAM 27 at a regular frame rate (a frame rate faster than that at the time of reception), and is continuously reproduced at a regular speed.

When the user performs the operation of disconnecting the line after the reproduction of the moving image, the information distribution center is notified of the disconnection of the line.
The communication network opens the line.

Since the communication capacity of the radio communication network with the information distribution center is small, it is not possible to reproduce a high-quality moving image in real time. As described above, in the present invention, when a moving image is transmitted, the moving image data is transmitted at a reduced frame rate, and the receiving side stores the moving image data until a predetermined amount is reached. After the storage of a predetermined amount of moving image data is completed, the moving image data is reproduced at a regular frame rate.

Specific examples of the use of the terminal of the present invention include:
For example, in a case where data of a product catalog is obtained from a department store. When obtaining data of a catalog of a certain product, it is appropriate to display product specifications, handling methods, introduction articles, and the like on the monochrome liquid crystal display 3 in characters or graphics. On the other hand, the product itself is a color LCD 17
In this case, it is suitable that the appearance of the product is a character / graphics data image and the operation state is a moving image.
Further, when information is input by the touch panel input device 2 in that state, the information is sent to the other party (data supply source), and the display content of the color liquid crystal display is switched accordingly, and characters are displayed on the monochrome liquid crystal display. The contents can be switched.

Further, since the form of the wireless communication network is not limited to wired or wireless, it is applied to communication terminals such as general public networks, ISDN, PHS, and mobile phones.

[0037]

As is clear from the above description, according to the present invention, when transmitting moving image data, the transmission is started at a lower frame rate (the number of frames per second) than usual, and the user information terminal is transmitted. The device temporarily stores the received data in a memory, and after the storage of a predetermined amount of moving image data is completed, reads out the data from the memory and continuously reproduces the moving image. Video data can be read out at a regular frame rate to reproduce high-quality video.When receiving video data, video data can be received even if the communication capacity is not applied to real-time video communication. it can.

[Brief description of the drawings]

FIG. 1 is a block diagram of an information communication terminal according to an embodiment of the present invention.

FIG. 2 is a diagram showing the appearance of an information communication terminal and a specific terminal according to an embodiment of the present invention;

FIG. 3 is a sequence chart showing communication between the information communication terminal and the information distribution center according to the embodiment of the present invention.

[Explanation of symbols]

 2 touch panel input device 3 monochrome liquid crystal display 5 monochrome LCD interface 6 control means 8 antenna 9 RF module 11 baseband processing means 13 communication protocol control means 14 bus 15 video decoder 16 color LCD interface 17 color liquid crystal display 19 microphone 20 speaker DESCRIPTION OF SYMBOLS 21 Voice interface 22 AD / DA conversion part 23 Encoding processing part 26 CPU 27 RAM 28 ROM

Claims (4)

[Claims] 1. A high-frequency circuit for communicating with a wireless communication network, baseband processing means for separating a PIAFS signal and other signals from a signal converted into a baseband signal by the high-frequency circuit, and the baseband processing means Communication protocol control means for extracting image data from a PIAFS signal which is a received data stream output from a memory, a memory capable of storing image data output from the communication protocol control means, and decoding image data read from the memory An information communication terminal, comprising: an image decoding unit for converting an image; and a color display for displaying an image decoded by the image decoding unit as a moving image. 2. A high-frequency circuit for communicating with a wireless communication network, baseband processing means for separating a PIAFS signal and other signals from a signal converted into a baseband signal by the high-frequency circuit, and the baseband processing means Communication protocol control means for extracting image data from a PIAFS signal which is a received data stream output from a memory, a memory capable of storing image data output from the communication protocol control means, and decoding image data read from the memory Image decoding means for decoding, a color display for displaying an image decoded by the image decoding means as a moving image, an audio circuit for reproducing an audio signal output from the baseband processing means, and the baseband processing Characters / graphs based on character / graphics data output from means Information communication terminal characterized by comprising a monochrome display for displaying information box. 3. A high-frequency circuit for communicating with a wireless communication network, a function of separating a signal converted into a baseband signal by the high-frequency circuit into a PIAFS signal as a received data stream and other signals, and data to be transmitted. Baseband processing means having a function of multiplexing a PIAFS signal as a stream and another transmission signal and sending the multiplexed signal to the high-frequency circuit, and a communication protocol control means for extracting image data from the PIAFS signal output from the baseband processing means A memory capable of storing the image data output from the communication protocol control means, an image decoding means for decoding the image data read from the memory, and a moving image for decoding the image decoded by the image decoding means. And a micro-display that converts the input sound into electrical signals An audio circuit for transmitting a signal from the microphone to the baseband processing means and reproducing audio based on an audio signal output from the baseband processing means; , A monochrome display for displaying character / graphics information based on the character / graphics data output from the baseband processing means, and a user performing various operations to input data. And an input / output means for sending the information to the baseband processing means. 4. An image data transmitted at a lower frame rate than usual is stored in a memory, and after a predetermined amount of storage is completed, the image data is read out from the memory, and the moving image data is decoded by an image decoding means. 2. The information communication terminal according to claim 1, wherein the terminal is decoded and a continuous moving image is reproduced by a color display.