JPH04282948A - Video still picture transmission facsimile equipment - Google Patents

Abstract

PURPOSE:To transmit a video still picture, to transmit a binarized video signal and to print it out by digitizing the video signal, applying compression processing to the result, applying Huffman coding and binarizing the result. CONSTITUTION:ADC11b-11d digitize an inputted video still picture and gives the result to a memory 12. A picture data is stored in the memory 12 to be a transmission data by depressing a freeze button 7. Then a header information read section 32 detects a synchronizing signal from a reception signal and a code data is extracted and a decoding section 21Bc applies DPC decoding and Huffman decoding to the data and it is subjected to inverse quantization 21Bb. Its output is given to the memory 12, from which a video still picture signal is given to a receiver 5. Moreover, a data of a still picture sent via a communication line 14 is received by a control section 23 and sent to a header information read section 33 via a demultiplexer 22B and a code data is extracted, subjected to Huffman decoding, the result is fed to a binary printer 29, in which a still picture is printed out.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a video still image transmission facsimile device which is capable of transmitting original documents, transmitting and receiving video still images, and printing video still images.

0002

[Prior Art] A facsimile machine optically reads a document to create digital data, sends the digital data to the other party via a communication line, and receives the digital data sent from the other party and records it on paper. It is well known as a device for obtaining original documents etc. by doing this.

[0003] Such facsimile machines are connected through a communication line, and a document can be transmitted from one facsimile machine to another facsimile machine.

0004

However, although the conventional facsimile machine described above can send original documents, it cannot send video still images, which are similar image signals. Furthermore, when transmitting video still images, it is necessary to prepare a separate device, which increases the number of parts and costs. Further, in the case of a conventional facsimile machine, it was not possible to print out still images even though a printer was installed.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to make it possible to send out original documents, and to make it possible to send and receive video still images.
Another object of the present invention is to provide a video still image transmission facsimile device which can also print out still images.

[0006]

Means for Solving the Problems FIG. 1 is a block diagram showing the configuration of the present invention.

In FIG. 1, the video still image transmission facsimile apparatus includes a digitizing means 101 for digitizing a video signal to produce digital data, and a memory 102 for storing the digital data from the digitizing means 101.
In response to the freeze switch 103, one frame of still image is stored in the memory 102, encoded and sent to the communication line 104, and
a transmission means 100 for receiving encoded data from the memory 102 and storing it in the memory 102; an analogization means 105 for converting the received data stored in the memory 102 into an analog signal and converting it into a video signal; The still image is processed by the binarization processing unit 10 of the facsimile unit 106.
7. Here, the transmission means 100 includes a CODEC means 111 for extracting one frame of data from the memory 102, compressing and transmitting the still image for one frame, and a CODEC means 111 for compressing and transmitting the still image for one frame.
11 to the communication line 104, and a control means 110 that controls the operations of these, the digitization means 101, and the analogization means 105.

The facsimile unit 106 also includes a scanner 115 that optically reads a document and converts it into an electrical signal, and an analog-to-digital converter (AD) that converts the electrical signal from the scanner 115 into digital data and supplies it to the selector 108.
C) means 116 and a binarization processing unit 10 that converts the digital data provided from the selector 108 into binarized data;
7, and a binary COD that supplies the binarized data from the binarization processing unit 107 to the selector 112 as encoded data.
An EC section 117, a selector 118 for selecting either the output of the binarization processing section 107 or the data received by the binary CODEC section 117, and a binary printer 119 for recording the data from the selector 118 on paper. It is equipped with

[0009]

[Operation] [Video still image transmission side] A video signal from a video camera inputted from a video input terminal is digitized by digitization means 101 and stored in memory 102, and simultaneously converted into an analog by analogization means 105. The image is sent from the video output terminal to the monitor television receiver, and the image being photographed by the video camera can be monitored on the television receiver. If there is an image to be transmitted at that time, by pressing the freeze switch 103, the video still image to be transmitted can be determined and stored in the memory 102 as a still image. The still image is taken out from the memory 102 as one frame of data, and the one frame of data is COD
The image is compressed by the EC means 111 and sent to the communication line 104 from the transmission control means 113. This allows a color still image to be sent to the other party's facsimile machine.

[0010] If the other party is a normal facsimile machine, one frame of data retrieved from the memory 102 is sent to the binarization processing section 107 via the selector 108, and the data is binarized as binarized data. value CODEC
Section 117. This binary data is a binary CODE
It is converted into encoded data in the C section 117, and the selector 11
2 to the transmission control unit 113. This encoded data is sent from the transmission control means 113 to the communication line 104. Therefore, the other party's facsimile device can receive the video still image.

Note that the binarized data from the binarization processing section 107 is sent to a binary printer 119 via a selector 118.
You can print out the still image currently being sent by giving it to .

[Video still image receiving side] Furthermore, encoded data sent via the communication line 104 is received by the transmission control means 113 and sent to the CODE via the selector 112.
It is sent to C means 111. In the CODEC means 111,
The received signal is expanded into the original signal and stored in the memory 102. The data stored in the memory 102 is converted into an analog signal by an analog converting means 105 and provided to a monitor television receiver as a video still image signal.

Note that if the encoded data sent from the other party is a binary video still image, the data is sent from the selector 112 to the binary CODEC section 117. This encoded data is converted into predetermined binary data by a binary CODEC unit 117 and supplied to a binary printer 119 via a selector 118. Thereby, the binary data is printed out by the binary printer 119.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to embodiments shown in the accompanying drawings.

FIG. 2 is a perspective view showing an embodiment of the video still image transmission facsimile apparatus of the present invention.

In FIG. 2, a video still image transmission facsimile device 1 is connected to a video (VTR) via a cable 2.
) A camera 3 is connected to a television receiver 5 via a cable 4. This facsimile device 1 is connected to a communication line 6, and can send or receive a document to or from a counterpart facsimile device (not shown) connected to the communication line 6. The facsimile device 1 is capable of transmitting and receiving video still images in addition to transmitting and receiving original documents. This facsimile device 1 is provided with a freeze button 7 for determining the video still image to be transmitted. Further, this facsimile device can also be used as an existing facsimile unit.

FIG. 3 is a block diagram showing details of the video still image transmission facsimile apparatus of the present invention.

The configuration of the facsimile section 16 in FIG. 3 will be explained. The original is optically read by the scanner section 25 and converted into an electrical signal. This electrical signal from the scanner 25 is supplied to the ADC 26 . The ADC 26 converts the input electrical signal into digital data. This digital data is input to the binarization processing section 19 via the selector 18. The binarization processing unit 19 converts the digital data into binarized data. The output of this binarization processing unit 19 is a binary COD
It can be supplied to the EC section 27A and the selector 28. binary CO
The DEC unit 27A supplies the binary data as encoded data to the multiplexer 22A via the header information adding unit 31. This data is sent from the transmission control unit 23 to the communication line 1
Sent on 4th. Furthermore, the data received by the transmission control section 23 is supplied to the header information reading section 33 via the demultiplexer 22B. Data from the header information reading section 33 is supplied to the binary CODEC section 27B. The data selected by the selector 28 is recorded on paper by a binary printer 29.

On the other hand, the configuration of the video still image transmission section in FIG. 3 will be explained.

The video signal code conversion section in FIG. 3 includes a digitizing means 11 for digitizing a video signal, a memory 12 for storing digital data from the digitizing means 11, and a memory 12 for storing data in the memory 12 for one frame. CODEC means 2 that extracts the data, compresses it, and sends it out.
Consists of 1A. The digitizing means 11 generates a luminance signal [Y
] and color difference signals [CR] and [CB], and a luminance/color difference separation unit 11a that separates the signals into color difference signals [CR] and [CB], and an ADC 11 that digitizes each signal.
It consists of b to 11d. The memory 12 has memory areas 12a to 12c, and stores a luminance signal [Y] and a color difference signal [Y].
Data separated for each [CR] and [CB] can be stored respectively. The CODEC means 21A includes a two-dimensional DCT section 21Aa that processes data from the memory 12, a quantization section 21Ab that quantizes the output thereof, and a quantization section 21Ab.
The encoder 21Ac performs DPCM encoding on the DC component and Huffman encoding on the AC component to obtain encoded data. The output from the encoding section 21Ac is connected to the multiplexer 22A via the header information adding section 30. Further, the brightness data retrieved from the brightness data memory area 12a of the memory 12 can be supplied to the selector 18 of the facsimile section 16. The brightness data selected by the selector 18 is
The data is binarized by the binarization processing section 17. This binarization processing section 1
The output of 7 is converted into encoded data by a binary CODEC section 27A. This encoded data is sent to the communication line 14 via the multiplexer 22A/transmission control section 23.

The video signal code conversion section in FIG. 3 includes a CODEC means 21B for decompressing coded data from the header information reading section 30, a memory 12 for storing data from the CODEC means 21B, and a memory 12 for storing data from the CODEC means 21B for the reception mode. It is provided with an analog converting means 15 which extracts the data stored in the memory 12 and converts it into an analog signal to generate a video still image signal. Here, the CODEC means 21B includes a decoding unit 21Bc that performs DPCM encoding on the DC component of the decoded data and Huffman encoding on the AC component of the decoded data to obtain data, and dequantizes the output thereof. It consists of an inverse quantization section 21Bb and a two-dimensional IDCT section 21Ba that processes the data and stores it in the memory 12. The analogization means 105 includes DACs 15a to 15c that convert each data from the memory 12 into analogs, and each DAC 15a to 15c.
Luminance/color difference synthesis section 15 which synthesizes the luminance signal [Y], color difference signal [CR], and [CB] from the , and obtains a video still image signal.
d.

FIG. 4 is a block diagram showing details of the binary CODEC unit 27.

The binary CODEC section 27A in FIG.
It includes a converter 27Aa that performs run-length conversion on binary data, and an encoder 27Ab that performs Huffman encoding on this data to obtain encoded data.

The binary CODEC section 27B in FIG.
It includes a decoding section 27Ba that performs Huffman decoding on decoded data to obtain run length data, and a conversion section 27Bb that converts the output thereof into binary data.

The operation of the embodiment configured as described above will be explained.

[Transmission of video still images] VTR camera 3
The video signal is displayed on a monitor television receiver 5. Check the image you want to send and press the freeze button 7. Then, call the person you want to send the message to, and once the connection is established, do the following: At this time, VTR camera 3
The video signal from the digitizing means 11 is divided into a luminance signal [Y], a color difference signal [CR], [
CB] and are input to the ADCs 11b to 11d. The ADCs 11b to 11d digitize the input signals and provide them to the memory 12. When the freeze button 7 is pressed, the image data at that time is stored in the memory 12 and the transmission data is determined. The video still image determined in this way is taken out from this memory 12 as data for one frame. This one frame's worth of data is orthogonally transformed in a two-dimensional DCT section 21Aa, then quantized in a quantization section 21Ab, and then encoded in a coding section 21A.
c is used as code data. This data is sent to the transmission control unit 2 via the header information addition unit 30 and multiplexer 22A.
3. This data is sent from the transmission control section 23 to the communication line 14.

[Binarized transmission of video still images] After confirming the image to be transmitted as described above and pressing the freeze button 7, call the person to whom you wish to transmit, and once connected, perform the following operations. . The image data to be transmitted is already stored in the memory 12. When you want the other party's facsimile machine to print a video still image, the brightness data is retrieved from the brightness memory area 12a of the memory 12 and sent to the binarization processor 17 via the selector 18.
supply to. The binarization processing unit 17 converts the input digital data into binarized data and converts it into a binary CODE.
It is supplied to the C section 27A. This data is a binary CODEC
After being converted into encoded data by the section 27A, it is supplied to the transmission control section 23 via the header information addition section 31 and multiplexer 22A. This transmission data is sent from the transmission control section 23 to the communication line 14.

At this time, if the selector 28 is set to the binarization processing unit 17 side, the binarized data of the transmitted video still image will be supplied to the binary printer 29, so that image will be printed out. Ru.

[Video still image reception operation] On the other hand, still image data sent via the communication line 14 is received by the transmission control section 23 and sent to the header information reading section 32 via the demultiplexer 22B. . The header information reading section 32 finds a synchronization signal from the header and obtains code data. This code data is sent to CODEC means 21B. In the CODEC means 21B, the coded data is subjected to DPCM decoding and Huffman decoding in a decoding section 21Bc, and then supplied to an inverse quantization section 21Bb. The data dequantized by the dequantization unit 21Bb is converted into a two-dimensional IDC
The signal is processed by the T section 21Ba and stored in the memory 12. The data in the memory 12 is converted into analog data by the DACs 15a to 15c, respectively, and then supplied to the luminance/color difference combining section 15d. The luminance/color difference synthesis section 15d synthesizes the luminance signal [Y] and the color difference signals [CR] and [CB] to form a video still image signal, and supplies this to the television receiver 5.

[Binary video still image reception operation] Still image data sent via the communication line 14 is received by the transmission control section 23 and sent to the header information reading section 33 via the demultiplexer 22B. It will be done. The header information reading section 33 finds a synchronization signal from the header and obtains code data. This code data is sent to CODEC means 27B. In the CODEC means 27B, the code data is subjected to Huffman decoding in the decoding section 27Ba, and run-length/binary data conversion is performed in the converting section 27Bb. This binarized data is supplied to a binary printer 29 via a selector 28. As a result, the binary printer 2
A binarized video still image from 9 is recorded on the paper.

As described above, one facsimile apparatus includes a video still image transmitting circuit, a video signal receiving circuit, and means 18 for inputting the luminance data of the video still image to the binary CODEC section 17 of the facsimile section 16. , it is possible to transmit video still images between facsimile devices, and also to transmit and print out binarized video still images.

As described above, according to this embodiment, by providing the facsimile machine with a video input terminal, the VTR camera 3 and television receiver 5 in each home can be effectively utilized. Furthermore, according to this embodiment, the transmission control section 23 of the facsimile machine and the binarization processing section 17 that converts video still images into binarized data can be shared, so the number of parts is reduced. This embodiment can be realized entirely by electronic processing and does not require a color image printer, so it can be realized with the current size.

[0033]

[Effects of the Invention] As explained above, according to the present invention, it is possible to transmit video still images and binarized video still images by simply adding a few parts to an existing facsimile machine. It has the effect of printing out digitalized video still images.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing the configuration of the present invention.

FIG. 2 is a perspective view of an example of the overall configuration of an embodiment of the present invention.

FIG. 3 is a detailed block diagram of an embodiment of the invention.

FIG. 4 is a block diagram showing a circuit configuration of a code conversion unit used in an embodiment of the present invention.

[Explanation of symbols]

11 Digitization means 12 Memory 16 Facsimile Department 17 Binarization processing section 18 Selector 21A CODEC means 21B CODEC means 23 Transmission control section 27A Binary CODEC section 27B Binary CODEC section 29 Binary printer 100 Transmission means 101 Digitization means 102 Memory 103 Freeze switch 105 Analogization means 107 Binarization processing unit

Claims (1)

[Claims] 1. Digitizing means for digitizing a video signal to obtain digital data; a memory for storing the digital data from the digitizing means; and storing one frame worth of still image in the memory in response to a freeze switch. Then, it is encoded and sent to the communication line, and
a transmission means for receiving encoded data from a communication line and storing it in the memory; an analogization means for converting the received data stored in the memory into an analog signal into a video signal; and a still image for one frame from the memory. a video still image transmission facsimile device, comprising: means for inputting a video still image to a binarization processing section of a facsimile section.