JP3398450B2 - Transmission method of still image information and audio information - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [0001] BACKGROUND OF THE INVENTION The present invention relates to an NTSC system and the like.
Still images consisting of video signals of the standard color television system
Image information and a static message
Transmission of audio information related to still images via a telephone line
About the method. [0002] 2. Description of the Related Art A still image is transmitted using a public line.
Video phones are known. This is a video phone device
Attach a video camera and shoot with this video camera
Converts still image video signals to audio band signals and makes them public.
This is transmitted via a public telephone line. [0003] In this conventional video telephone, a black and white stationary
The image is based on the amplitude-phase modulation method (TT
C (abbreviation of Telegraph and Telephone Technical Committee) standard method)
Transmitted. On the other hand, standard color television such as NTSC
Vision type color still images are, for example, facsimile
It is converted to a TTC standard videophone signal in the modem.
(See, for example, JP-A-2-246486).
reference). In addition, a color still image signal and a color difference
Signal, convert to digital signal, compress data
Who can transmit in the voice band and transmit on the public line
There is also a method (see, for example, JP-A-3-124186).
See). [0004] By the way, a still image as described above is transmitted.
The description of the still image as a voice message
If sent, the voice message is a still image
After the transmission is completed, the user sets the voice
In general, it is transmitted. The audio information in this case is
Temporary temporary information that the recipient heard
Remembering this is not usually done
No. This voice information can be stored like an answering machine.
It is possible to use analog sound.
It is memorized as a voice. [0005] As described above, transmission is performed as described above.
Request to retransmit sent still images and voice messages
If there is a conventional system, the audio is analog sound
I had to transmit my voice. However, transmission in the state of analog voice
Re-transfer will not degrade the voice quality.
I can't. In addition, when transferring or retransmitting,
Is different from the sequence of the still image signal transfer.
Audio signal must be transmitted on the
The sequence becomes complicated. On the receiving side of the transfer signal,
Capture still image signals and analog audio signals separately
Must be stored in the memory.
There is a problem that it becomes complicated. [0007] The present invention can solve the above-mentioned problems.
The aim is to provide a method for transmitting still image information and audio information.
Target. [0008] Means for Solving the Problems To solve the above problems,
Therefore, in the present invention, the standard television
Still image information of signalIsConvert to digital signal and data
Compress and facsimile over phone line, HDL
Allocated in the C frame and transmitted,
Related audio informationIsConvert to digital signal
The compressed audio information is compressed and the still image information is compressed.
HDLC on facsimile procedure following compressed data
Allocated in a frame and transmitted, and
Information for identifying the presence or absence of transmission of audio information related to
To transmit informationAlong with When a call is made,
Still image information allocated in the HDLC frame
And cannot decode audio data
If it is determined that the terminal is a facsimile terminal,
Image information into a facsimile image signal,
Facsimile image signal to the other deviceThis
And features. [0009] In the transmission method according to the present invention having the above configuration,
Represents still image data and audio data related to the still image.
Data is the same as HDLC frame in facsimile procedure
And transmitted. Therefore, still image data
Data and audio data related to the still image
Data in the same way as
Can be included. Also, the transmission is a retransmission
The transmitted information is digital data
Thus, audio information without quality deterioration can be reproduced.
Also, even if the data imported to this memory is re-transferred,
There is little deterioration in voice quality. [0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Still image information and audio according to the present invention will be described below.
One embodiment of the information transmission method is a still image
Refer to the figure together with the information and audio information transmission device.
Will be described. FIG. 1 shows an embodiment of a transmission apparatus according to the present invention.
FIG. 1 is a block diagram of an example, where 1 is an NTSC standard color television.
This is an input terminal for a color video signal of the vision system. This
As an input color video signal supplied to the input terminal 1 of the
Was taken with a popular camera-integrated VTR, for example.
The color video signal of the image and the playback
Color video signal, and also a laser disk player, C
Various color video signals from D-ROM players
NTSC color video signals from various sources
You. Reference numeral 2 denotes a reference NTSC video signal generation circuit.
is there. Reference NTSC video signal from this generator 2
Are the horizontal and vertical synchronization signals, and also the color synchronization signals.
Including all burst signals. This reference NTSC video signal
Is N from the received facsimile signal, as described below.
When forming a TSC image signal, the NTSC image
The image signal is obtained in synchronization with this reference NTSC video signal.
Used to make sure. Reference numeral 3 denotes an input video signal switching circuit.
Color video signal through terminal 1 and
Select one of the reference NTSC video signals and
Output. The switching circuit 3 includes a system described below.
Switching by switching control signal from controller 23
When capturing images, the video from input terminal 1
When a signal is selected and read, the reference
Select NTSC video signal. Reference numeral 4 denotes an NTSC decoding circuit. This N
FIG. 2 shows a schematic block diagram of the TSC decoding circuit 4.
You. In the NTSC decoding circuit 4, the switching circuit 3
Digitally processes NTSC color video signals from
For example, in the NTSC decoder 41, the input color video
The luminance signal, the red color difference signal and the blue color difference signal are
Decode. The luminance from the NTSC decoder 41 is
Signal and the red and blue color difference signals
A / D conversion is performed in the barters 42, 43, and 44
For example, a digital luminance signal Y and a digital luminance signal Y of 8 bits / pixel, respectively.
It is converted into digital color difference signals Cr and Cb. In this case,
The luminance sample Y is 512 samples per line.
However, the color difference signals Cr and Cb are dot-sequential signals and
It is taken out alternately from the multiplexer 45, and
256 samples per in. Therefore, each
The digital pixel sample is the difference between the luminance signal sample Y and the red color difference.
Set with signal Cr or luminance signal sample Y and blue
16-bit digital signal consisting of a set of color difference signals Cb
Issue. Reference numeral 5 denotes an image memory, which includes a digital image memory.
Elementary sample (Y, Cr or Y, Cb set) is 1
Frames are stored. In this example, one frame table
The number of indicated pixel samples is: horizontal x vertical = 512 (pixels) x 4
80 (line). Reference numeral 6 denotes a synchronization separation circuit, and an input switching circuit 3
The horizontal and vertical sync signals from the video signal from the
You. The separated synchronization signal is used as image data to be stored in the image memory 5.
Used for timing control when writing and reading data
Can be. Reference numeral 7 denotes a memory controller, which is a system controller.
Reads the image memory 5 under the control of the controller 23
Write / write control. This memory controller 7
Is also synchronized with the synchronization signal from the synchronization signal separation circuit 6.
Write or read address generation. Picture
One frame of data stored in the image memory 5 is
It composes a still image.
In order to display an image, the image memory 5 repeats the same process.
One frame of data is read. The image memory
5 is changed from the facsimile image signal as described later.
When the converted black and white video signal is written
There is also. Reference numeral 8 denotes an NTSC encoding circuit. FIG.
FIG. 2 is a schematic block diagram of the NTSC encoding circuit 8.
Is shown. In the encoding circuit 8, first, an image memory
16-bit digital pixel sample read from 5
The luminance signal Y, which is the lower 8 bits of the
1 and the top 8 digital pixel samples
Of the bit color difference signals, the red color difference signal Cr is latched.
Path 82, or latches the blue color difference signal Cb
It is latched and synchronized by the path 83. In this case, synchronization
In this state, the color difference signal samples Cr and Cb are
Each of the same samples is continuous for every two pixels. The latched luminance signal Y and color difference signal
Cr and Cb are converted to A / D converters 84 and 85, respectively.
At 86, it is converted to an analog signal. And thus gain
The obtained analog luminance signal and color difference signal are NTSC encoded.
Supplied to the coder 87, and converted into an NTSC color video signal.
Is done. As described above, the NTSC encoding circuit 8
, One frame of data from the image memory 5
Since it is repeatedly read, this NTSC encoding
The output signal from the path 8 is a color still image signal. Reference numeral 9 denotes an output switching circuit, which is an input switching circuit.
From signal from path 3 or from NTSC encoding circuit 8
And selectively take out one of the signals
Derive. The output terminal 10 is, for example,
Connected to the video input terminal of the
-A still image is displayed. Reference numeral 11 denotes a data compression / decompression circuit. this
The circuit 11 transmits a color still image signal as described later.
When communicating, it acts as a data compression circuit,
When color still image data is received,
Work as a long circuit. In this example, a color still image
JPEG is used as the data compression method for data.
Can be The compression rate is set to 1/20, for example,
The signal is compressed into a signal that can be transmitted sufficiently on the line. Reference numeral 20 denotes a CPU. 21 is a program
The ROM 21 stores transmission and reception data.
For the CPU 20 is stored.
Is executed by The CPU 20 has a printer interface.
A connection terminal for a printer (connector) through the face 31
32) is connected and the image scanner
Connection for image scanner via interface 33
A terminal (connector) 34 is connected. A printer is connected to the connector 32,
When the image scanner is connected to the connector 34,
Making the example device function as a facsimile device
Can be. That is, the received fax
Similiar images can be printed on recording paper.
Obtained by scanning a paper manuscript with the image scanner.
The obtained image signal is input to this device. Image input from image scanner
The signal can be transmitted as a facsimile signal,
Also, a standard television system is used according to an image conversion method described later.
Video signal into a still image signal (monochrome video signal)
It can also be monitored by the television receiver. Reference numeral 22 denotes a main RAM, for example, a 1.5M bus.
Compressed video data is stored in this
You. Further, the main RAM 22 stores information as described later.
Then, the transmitted voice information is also stored. Reference numeral 23 denotes a system controller.
System control and timing control around 0
File, address decoding, JPEG interface, etc.
Do. 24 is used when performing JPEG compression / decompression.
This is a RAM that works as a work area. The system controller 23 has an input key
As a dip switch (Dip SW) and other Keith
Switch (SW) is connected and the light emitting die for display
An ode (LED) or the like is connected. By key switch
Input operation to set the image quality mode described later or send
The communication mode is set. Reference numeral 35 denotes an NCU (network controller).
Unit), the telephone line L is connected,
The talker 36 is connected. NCU 35, telephone / modem off
It has a switching function, ringtone detection function, and end-of-call pulse detection function.
You. Reference numeral 37 denotes a G3 facsimile modem.
In this example, as the modem 37, for example,
The model number R96VFX manufactured by R
An M circuit 37A is provided. This ADPCM circuit 37A
Has an encoding / decoding function,
Whether to operate as a decoder or a decoder
Is controlled by the CPU 20. And later
As described above, the analog voice signal sent from the other party
The ADP is transmitted to the ADPCM circuit 37A of the modem 37.
It can be encoded into a CM signal, compressed and imported.
it can. The captured audio data is stored in the main RAM 22.
Remember. As will be described later, the main RAM 22
ADPCM voice data read from the
Analog audio decoded by the DPCM circuit 37A
Output to the audio output terminal 39 via the amplifier 38
can do. This audio output terminal 39 is
Connected to the audio input terminal of the TV
Can be played from speakers. The apparatus of this example is capable of compressing a still image
The digital data is sent to the HDLC file according to the facsimile procedure.
Allocate to frame and send. In addition, as described later,
Related audio digital data is added to the still image to be sent.
When the audio data is stored in the RAM 22,
The data is also divided into HDLC frames according to the facsimile procedure.
The image data is transmitted following the image data. Then, as described later, the still image information
When sending or when relevant audio information is present
When the still image information is transmitted, the program
The CPU 20 determines that the transmission destination device is a device of this example.
It recognizes whether the device has a function corresponding to the device.
Then, the partner device has a function corresponding to the device of this example.
Compressed still image data and compressed audio
The data is transferred to the facsimile
Transmission is performed according to the kushimily procedure. In the case of this example, color still image information is transmitted.
Image quality when connecting to the system controller 23
In this example, the “Detailed mode”
Mode, standard mode, and high-speed mode.
Is selectable. The fine mode is one frame of image data.
With all the pixels of the display pixel sample in the image memory 5
(512 × 480). Standard mode is one frame
The image data of the display
With respect to pull, the number of pixels in the horizontal direction is
And a pixel sampler in which the number of lines in the vertical direction is
(256 × 240). High-speed mode is 1
The image data of the frame is stored in a display pixel of the image memory 5.
Reduce the number of pixels in the horizontal direction to 1/4 of the sample
At the same time, the pixel size is reduced by 1/4 in the vertical direction.
It is composed of the number of samples (128 × 120). In this example, the still image data consists of one screen.
The minute data is transmitted in blocks. How many screens
Whether to transmit by lock depends on the image quality mode. example
For example, as shown in FIG.
In the standard mode, one frame is transmitted in two blocks.
Locked transmission, and in high-speed mode, one frame is one block.
Transmitted by Therefore, the image quality mode is determined
If the number of transmission blocks is determined, a still image of one frame
The data length is determined. In the standard mode and the high-speed mode, NTSC
Decimation processing performed on signals from decode circuit 4
Is performed when image data is read from the image memory 5.
Or at the time of writing. However, write
If it is performed at the time of embedding, the memory area is standard in the image memory 5.
In the mode, 1/4 divided in half in the horizontal and vertical directions
Area in the high-speed mode
One frame of image data is stored in the divided 1/16 area
It becomes possible to write. Therefore, images in the fine mode
The data for one image is equivalent to that of the standard mode,
The data capacity is 16 images in the speed mode. The RAM 22 stores a plurality of still images.
It is possible to store compressed data of
When the quality is in the fine mode, compression of 30 still images
Data can be stored. Still image of hardware configuration as described above
The signal processing operation in the information and voice information transmission device,
This will be described below. [Preparation (standby) state]
Is waiting for an incoming call through the telephone line L.
The NTSC color video signal from the input terminal 1
Decode by TSC decode circuit 4 and write to image memory 5
Read from the image memory 5 and
NTSC video signal encoded by C encoding circuit 8
Signal is connected to the output terminal 10 via the output switching circuit 9.
Supplied to the monitor receiver that is
While capturing the desired color still image.
I can. That is, the desired image is displayed on the screen of the monitor receiver.
When a still image is found, the system controller 23
Operate the still image capture switch connected to the
I do. Then, under the control of the memory controller 7,
The timing when this capture switch is operated.
The subsequent one frame of color still image data, ie, NT
The one frame decoded by the SC decoding circuit 4
The luminance signal data Y and the color difference signal data Cr, Cb of
In the data compression / decompression circuit 11, the system control
The JPEG compression process is performed under the control of the
And the image data is expanded.
The data is written to the image memory 5. Then, the memory controller 7
From the image memory 5, the JPEG compressed / decompressed
Color image data is repeatedly read out and the NTSC
It is supplied to the code circuit 8. Therefore, monitor receiver
Screen shows the still image data at the time the capture switch was operated.
Image data once compressed / decompressed by JPEG
Is displayed as a still image and monitored. The user saves the color still image.
The save key when not in use. Then, monitor
Compressed JPEG-compressed still image
Image data is stored in the RAM 22. As described above, the color to be transmitted
-Still images can be stored in the RAM 22. What
Please do not store color still images you want to send in advance.
Even while checking on the screen of the monitor receiver,
Perform the same operation and operate the send key instead of the save key
By doing so, it is also possible to transmit. In that case
However, the compressed image data is temporarily stored in the RAM 22.
available. [When transmitting still image information registered in the own device]
Description] In this example, as described above,
Send the still image information selected by the user to the destination
Mode (hereinafter referred to as a self-transmission mode) and other
A mode for transferring information transmitted from a transmission device (hereinafter referred to as a mode).
This is hereinafter referred to as a transfer mode).
Mode select key connected to the controller 23
User can choose. In this section, the former
The self-transmission mode will be described. The color video image signal to be transmitted is JP
Since the EG is compressed and stored in the RAM 22,
The compressed image data is read out from the RAM 22 and
And sends the compressed image data to a decompression
Coded, luminance signal sample Y and color difference signal sample C
pixel sample data consisting of r and Cb
Write to file 5 and develop. This image is expanded in the image memory 5
The still image is transmitted via the NTSC encoding circuit 8 to the
Supplied to the TV receiver, displayed on the screen, and
Is done. In this self transmission mode, the user
When the related audio information is transmitted to the still image
Make a facsimile communication conversation reservation and send
U. The program for this transmission is stored in the ROM 21.
It is stored and executed by the CPU 20. In addition,
At the time of transmission, the transmission destination device is the same device as the device in the example of FIG.
Recognizes that it is a compatible terminal device with
What to do. This is not only for self-transmission mode,
The same applies to the transfer mode described above. FIG. 5 shows an outline of the operation of the apparatus of this example at the time of transmission.
FIG. 6 is a schematic flowchart, and FIG.
FIG. That is, in the flowchart of FIG.
In step 101, the transmitting side (calling terminal) performs a calling operation.
And the calling tone CNG as shown in FIG.
To the other party (the called terminal). The far end responds
After being connected to the line, the called terminal identification signal CED is transmitted.
Send to the side. This allows the sending side to send the
Check the response. If the other party does not respond, for example, for a predetermined time
When the time has elapsed, the transmission mode ends. Then, in step 103, the other party
Digital identification signal DIS and phase
The hand device is a terminal outside the range of the reception function of the CCITT standard.
In this case, it also receives the non-standard terminal identification signal NSF.
I believe. The signal DIS indicates that the other device has received the CCITT standard.
This signal is sent when the terminal has a communication function.
The signal NSF indicates that the partner device is a CCITT standard receiver.
If some of the functions are outside the scope of the functions, identify those functions.
Sent to send. This non-standard terminal identification signal NSF
Contains the member code, and this member code
Whether the receiving terminal has the function of FIG. 1
Is identified. From the above, the transmitting side determines in step 10
4. In the signal DIS and the signal NSF, the partner device
Whether the terminal has the same function as the device in FIG.
Determine. Then, the transmitting side transmits these signals DIS and N
Select from the functions of the partner device on the receiving side indicated by SF.
Digital command signal DCS or non-standard to specify the function
The function setting signal NSS is transmitted. And from the partner device
Waits for the reception preparation confirmation signal CFR, and proceeds to the next step.
No. Each control signal in the above sequence is HDLC
It is transmitted in the form of a frame. Before the first HDLC frame,
The entire structure of the communication line so that data can be transmitted without loss
To ensure that the components are adjusted to the proper state,
A preamble is sent. This preamble is controlled
The signal transmission direction changes, and a new signal transmission starts.
Is always sent. In step S104, the partner deviceH
Still picture information and sound allocated in the DLC frame
Can receive and decode voice informationOn compatible terminals
If it is determined that there is no
Then, it shifts to the routine for transmitting. Although illustration is omitted,
In this routine, the destination device is
If it is determined that the terminal is not a kushimiri terminal, transmission is stopped.
To be reminded. Also, if the partner device is a facsimile machine
When it is determined, the still image data is stored in the image memory 5, for example.
The luminance signal Y to a facsimile image.
A corresponding black-and-white dot signal is formed to capture still image data.
Is converted to a facsimile image signal and the facsimile image signal
Send the issue. In step 104, the partner device of the transmission
Is determined to be a corresponding terminal, Step 105
To the compressed color still image data
37 to the telephone line L via the NCU 35 and the
Send to device. This compressed image data is shown in FIG.
As shown, the 64-byte information field in the HDLC frame
And transmitted. FIG. 7A shows information such as image data in an HDLC file.
The structure of the HDLC frame when transmitting as a frame
The structure of the HDLC frame of the control signal
And slightly different. The HDLC frame in this case is shown in FIG.
As shown in the figure, the beginning and end of the frame are identified by flags.
It has been made separate. After the first flag,
Lesfield, Control Field, FCD F
CF (FCF is facsimile information fee
Field, frame number, information field, FCS (frame
Check sequence). information
The fields are set to the appropriate number of bytes, but in this example
Is set to 64 bytes. FCS is
This is a sequence for error control of the
16 bits are inserted. Although not shown,
Preamble before consecutive HDLC frames
Is sent. The first HDLC file for image data transmission
In the information field of the frame, as shown in FIG.
Data AD (1 byte) indicating the destination,
Data to identify quasi-high-speed image quality modes and
Data to identify the presence or absence of added audio data
FCB including facsimile control block
Data (48 bytes) is included. The data AD indicating the transmission destination is shown in FIG.
9 as shown in the configuration of the service system.
-Specify the destination such as devices, relay terminals, and other terminals.
Things. The receiving side transmits the image data to the modem 37.
And stored in the main RAM 22. Soshi
The compressed image data in the main RAM 22 is
Decompressed by the compression / decompression circuit 11 and stored in the image memory 5 as a still image
To expand. Therefore, the monitor connected to the terminal 10
-Still images are reproduced on the receiver. As shown in FIG. 6, the transmitting side transmits
If you want to send audio information related to still images,
Of the switches connected to the system controller 23
Operate the talk reservation key. In step 106, the still image
When it is determined that the transmission of the image data has been completed, a conversation reservation is made.
It is determined in step 107 whether or not the operation has been performed. Association
If no talk reservation has been made,
finish. On the other hand, if a conversation reservation has been made,
If it is determined in step 107, the process proceeds to step 108,
A call signal generation circuit (not shown) provided in the device
It drives and calls the telephone 36. For this call
If the user does not respond for a predetermined time, for example, step 109
When the determination is made in the above, the routine of the own transmission is terminated.
You. Also, the user who made the conversation reservation went off-hook.
Is detected in step 109, the next step 110
Then, the line is switched to the telephone 36 side. Thereafter, the user enters the telephone 36
A predetermined key operation for transmitting audio information, for example,
Press the # key. Then, the receiving side receives this, and
The log voice information is decoded by the ADPCM circuit 37A of the modem 37.
Switch to data compression mode. This state
Allows the sending user to hear the audio associated with the still image information.
It is input from the handset of the telephone 36 and transmitted as analog voice.
Send. The receiving side connects this to the ADPCM circuit of the modem 37.
Still image received just before ADPCM compression at 37A
Write to main RAM 22 in association with image data
No. The received analog voice is voiced via the amplifier 38.
It is led to the output terminal 39. Therefore, the television receiver
You can listen to this by playing back through the speaker. The user on the transmitting side finishes transmitting the audio information.
When done, go on-hook. Step on this hook
Upon detection at 111, the transmitting device will
End the transmission mode. After the reception is completed, the user on the receiving side sets
By performing key operations, the received still image information and
The additional audio information can be reproduced and viewed. This and
Then, the receiving side, for example,
Additional sound created based on the reception of information indicating the arrival of the notification
The presence flag is stored together with the main RAM 22.
Therefore, monitoring with a monitor receiver from this flag
Indicating that audio information has been added to the still image
A message is formed and stored in the image memory 5, for example,
-Combine in the state of par imposed. Therefore, the user on the receiving side can monitor
-At the receiver, additional audio information is
You can know that it exists. So this addition
When you want to hear audio information,
Press an operation key connected to the controller 23. Then,
The corresponding ADPCM stored in the in-RAM 22
The audio data is read out, and the ADPCM circuit of the modem 37 is used.
And an audio output terminal 39 via the amplifier 38
Is output to This output terminal is connected to the monitor as described above.
Connected to the audio input terminal of the receiver
Listen to this additional audio information using the monitor receiver speaker.
Can be. [Explanation of Transfer Mode]
The received still image information and its additional audio information are as follows:
Can be transferred to other devices with the same function.
You. FIG. 8 is a flowchart showing the routine of this transfer mode.
It is a chart. The transfer mode routine
Start by pressing a key. Before transfer,
The still image information to be transferred is read from the main RAM 22.
Out, expand the data, expand it to the image memory 5, and
Confirm by monitoring with a TV receiver. This and
As described above, if there is additional audio information,
The message is displayed superimposed on the still image.
As described above, the additional sound can be monitored.
Wear. Then, the monitored still image and additional sound are transferred.
Operate the transfer key when sending. Steps 201 to 204 of this transfer mode
Until steps 101 to 10 of the above-mentioned own transmission mode,
Same as up to 4. Then, in step 204,
Determines whether the hand device is a compatible device and the partner device
If it is determined that the terminal is not a terminal,
As in the case above, the
And the other device is compatible,
If it is determined that the device is not a x-ray machine, the transmission is stopped.
Also, determine that the partner device is a facsimile machine
The still image data to the facsimile image signal
And the facsimile image signal is transmitted. Also, in step 204, the partner device
If it is determined that the device is a device, the process proceeds to step 205.
Whether the still image information to be transferred has additional audio information
Is determined. If there is additional audio information, from step 205
Proceeding to step 206, the FCB data shown in FIG.
Data to identify the presence or absence of audio data
The voice information is transmitted as “present” and the process proceeds to step 207. In step 207, the still image data is
In the same manner as described above, the compressed data is stored in H as shown in FIG. 7C.
Assigned to the 64-byte information field of the DLC frame
And transmit. The additional audio information is compressed image data.
The ADPCM audio data is shown in FIG.
In such a manner as to be transmitted to the information field. At step 205, it is determined that there is no additional audio information.
When separated, step 205 to step 208
To the audio data in the FCB data shown in FIG. 7B.
Data to identify the presence or absence of data
And proceeds to step 209, where the compressed still
As shown in FIG. 7C, only the image data is an HDLC frame.
Is allocated to the 64-byte information field and transmitted. Transmission of still image information and additional audio information
If the transmission of only the still image information is completed,
Proceed to step 10 and send a procedure end signal EOP indicating the end to the other party.
Send and wait for message confirmation signal MCF from the other side
Then, a line disconnection command signal DCN is transmitted to the other party. Less than
This is the end of the transfer transmission procedure. The receiving side transmits the compressed image data and the additional audio data.
Data along with the data AD and FCB data
Write to AM22. At this time, the compressed image data is
Fig. 4 shows the settings for fine, standard, and high-speed image quality modes.
It is transmitted in the state of the block structure as
The data length of the image data is the FCB data shown in FIG. 7B.
Can be detected from the image quality mode information
You. Therefore, compressed image data and ADPCM audio data
Insert a flag to indicate that
And can be detected and separated into the main RAM 22.
Can be written. Then, in the same manner as described above, the compressed image data
Data is read from the RAM 22 and a data compression / decompression circuit
The data is decompressed and decoded at 11 and expanded in the image memory 5.
Then, the NTSC color circuit is used by the NTSC encoding circuit 8.
It is converted to a video signal and
Color still image on the screen.
Will be issued. Then, as described above, additional voice is present
From the identification data ID of the
Message, and the message is displayed on the screen of the TV set.
Page is displayed. From this message, the user
Key operation, the ADPCM
The audio data is read out, and the ADPCM circuit of the modem 37 is used.
Decoded at 37A and converted back to analog audio, output
Is supplied to the television receiver via
Played with mosquitoes. As described above, the information added to the still image information is
Audio information is also converted to an ADPCM signal and sent to a facsimile
HDLC frames are sequentially allocated and transmitted. This
Therefore, not only still image data but also audio data
In the same sequence, the main RAM 22
Can be captured. And in this case,
Indicates the presence or absence of additional audio as data in the HDLC frame
Image data and audio data simply by transmitting
Can be taken away. Note that image data and audio
Inserting data indicating data delimiter into transmission data
Of course, this may be done. Further, voice information is transmitted through an analog telephone line.
Is transmitted as a digital signal, so there is no quality degradation.
And easily transfer it with the image data.
Can be. In the above example, in the preparation state,
Can only register still image data
However, a microphone for audio input is provided,
Register audio information related to image data in advance.
Is also good. If you have a function to register in advance,
The transmission method is the same as the transfer mode, not the own transmission mode.
Still image data and additional audio data using the HDLC
It can be allocated to frames and transmitted. By utilizing the above features, the present invention
By using different transmission methods, you can perform various services
Can be. FIG. 9 shows an embodiment of the service system.
FIG. This service system is
Center equipment having the same functions as the transmission device of the example of FIG.
41 and at least the transfer function of the transmission device of FIG.
It comprises a relay terminal 42 and a member terminal 43. In this example, the center device 41 and the relay
The terminal 42 is connected, for example, by a public telephone line.
However, between the relay terminal 42 and the member terminal 43, for example, a PBX
An extension line of such a private telephone device is used. Member terminal
A plurality of units 43 can be connected. This is, for example,
Member terminal 43 installed in each apartment house
The relay terminal 42 provides a still image information and audio information providing service.
This is an example of a service. For the center device 41, for example, an advertisement
And various service information to the member terminal 43 by image and sound.
The information providing member terminal 44 you want to provide
Connect more. Center equipment 41 has its own service information
It is of course possible to create For example, the information providing member terminal 44 displays a still image
Service information you want to provide, created with information and audio information
As described above, through the telephone line
Is transmitted to the device 41. The center device 41 is as described above.
As described above, these still image information and audio information
Take it into memory as information. And the center equipment 4
1 is a telephone number to the relay terminal 42 in the transfer mode.
To the HDLC frame of the facsimile procedure
In addition, these image data and audio data are transferred. The relay terminal 42 receives the transfer image data
And voice data to each member terminal 43 sequentially by extension.
Repeat retransmission. Each member terminal 43 displays the received image.
Image data and audio data are reproduced in the same manner as described above.
To receive the service by watching it on a TV set, for example.
It is At this time, in this example, each member
The provided still image and sound are displayed on a large screen and sound.
What can be viewed on a TV receiver with good voice quality
It is. In this case, the center device 41 and the relay end
The transfer is repeated at the end 42, but as described above,
Since the audio information is a digital signal, the reproduction audio quality is inferior.
There is no conversion. In this way, transfer is possible without deterioration of voice quality
Therefore, the service system of FIG. 9 can be realized.
However, in the case of the system configuration of this example, from the relay terminal 42
Image information and audio information through each extension to each member terminal 43
, So you will not be charged for this extension
There is no benefit. The file read from the image scanner is
Convert facsimile image data to video data
Write to the memory 5 and monitor with a TV receiver
Is possible. For example, black and white of facsimile image data
For the dot signal, one row of black and white dots is thinned out in the horizontal direction.
And the number of display pixels of the image memory 5 is 512 or less.
And 480 lines in the vertical direction.
The image memory is thinned out as necessary so that
Write to. At this time, the information of the black and white dots is
Write to the image memory 5 in correspondence. For example, a white dot
Convert to all “0” 8-bit pixel samples and write
In addition, the black dot is an 8-bit pixel sample of all “1”.
Convert to pull and write. Next, from this image memory 5
The pixel data is read out and sent to the NTSC encoding circuit 8.
Is converted to an NTSC video signal. This is the output switching
Supplied to the monitor receiver via the
A facsimile image is displayed on the screen of the receiver. The information of the black and white dots is that white dots are white brightness.
Level and black dots are set to the black luminance level,
The video signal is converted to an NTSC video signal by the
Display a facsimile image on the imager screen
Is also good. The facsimile image converted in this way
The video signal is further compressed and transmitted as still image information.
You can also send it. In that case, the identification data ID
Includes information indicating the type of the transmission image. The compression method of the color video signal is JP
Other compression method can be adopted instead of EG method
You. The data compression method of audio information is also ADPCM method.
Instead, other compression schemes can be employed. Furthermore, A
The DPCM circuit does not need to be built into the modem. [0091] As described above, according to the present invention, the static
According to the still image information and audio information transmission method, the image information
HDLC frame and voice information according to facsimile procedure
Analog telephone calls in digital signal status.
Can be transmitted by wire. Therefore, the image data
Transmit and receive data and audio data in the same sequence
And the configuration for transmission and reception is simplified. Also, a digital signal is transmitted through an analog line.
The audio information can be transmitted together with the image information in the state of
Even if voice information is transferred or re-transmitted, signal quality will deteriorate.
It is possible to transmit without using.In addition, the present invention
According to the other party, the partner device is allocated in the HDLC frame.
And decode the received still image information and audio information
Device is not compatible,
If the terminal is a facsimile terminal, the facsimile
Image signal and send it to the other device by facsimile.
There is an effect that can be.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a block diagram of one embodiment of a transmission device for still image information and audio information according to the present invention. FIG. 2 is a block diagram of one embodiment of an NTSC decoding circuit of the example of FIG. 1; FIG. 3 is a block diagram of one embodiment of the NTSC encoding circuit of the example of FIG. 1; FIG. 4 is a diagram for explaining a hierarchical structure of compressed image data. FIG. 5 is a flowchart illustrating an example of a transmission operation of the device in the example of FIG. 1; FIG. 6 is a diagram for explaining an example sequence at the time of transmission of the device in the example of FIG. 1; FIG. 7 is a diagram illustrating an HDLC frame. FIG. 8 is a flowchart showing an example of a transmission operation of the method according to the present invention. FIG. 9 is a diagram showing an example of a telephone service system using the method according to the present invention. [Description of Signs] 4 NTSC decoding circuit 5 Image memory 7 Memory controller 8 NTSC encoding circuit 11 Image data compression / decompression circuit 20 CPU 21 Program ROM 22 RAM 23 System controller 35 NCU 36 Telephone 37 Modem 37A ADPCM circuit 41 Center equipment 42 Relay terminal 43 Member terminal 44 Information providing member terminal

────────────────────────────────────────────────── ─── Continuation of the front page (56) References JP-A-2-16896 (JP, A) JP-A-5-199343 (JP, A) JP-A-6-165170 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) H04N ^7/ 00-7/088 H04N ^7/ 24-7/68 H04M 11/06

Claims (1)

(57) [Claims] [Claim 1] Still image information of a video signal of a standard television system is converted into a digital signal, data is compressed, and a facsimile procedure is performed within a HDLC frame via a telephone line. allocation and transmission, voice information associated with the still image information is converted into a digital signal, and data compression, facsimile procedure on subsequent voice information data compressed into compressed data of the still picture information, HDLC frame and transmitting allocation within, and with so as to transmit information for identifying the presence or absence of transmission of voice information associated with the still picture information, at the time of calling, with split partner device is within the HDLC frame
Receives and decodes still image information and audio information
Determined that the facsimile terminal cannot be used
Sometimes, the still image information is converted to a facsimile image signal.
And converting the converted facsimile image signal
A method for transmitting still image information and audio information, which is transmitted to a partner device .