JP2689901B2 - Picture signal communication system - 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 signal communication system for transmitting image information coded data, and more particularly to a function for adding and communicating additional information other than the image signal.

[0002]

2. Description of the Related Art Conventionally, this type of picture signal communication system has
Communication is performed as image information in which encoded image information and additional information such as a character code are combined to improve transmission efficiency.

For example, in Japanese Unexamined Patent Publication No. 02-029154, the image information encoded by the transmitting unit and the character code are combined and transmitted, and the image information and the character decoded by the receiving unit are output to the recording unit. To improve the transmission efficiency.

[0004]

However, in the above-mentioned conventional image signal communication system, the line efficiency is improved by decomposing the image information to be transmitted into the coded data and the character code, and then combining and transmitting them. However, the information that is combined with the encoded data and transmitted is limited to the character code at the time of recording, and it does not have the function of transmitting additional information other than the image signal. Since the amount of information to be combined with data is determined regardless of the compression rate of encoded data, the line is used effectively when the compression rate is good and a large amount of information other than encoded data can be combined for communication. Didn't.

The present invention has been made in view of the above-mentioned conventional circumstances. Therefore, the object of the present invention is to solve the above-mentioned problems inherent in the prior art and to make more effective use of lines. It is to provide a new image signal communication system.

[0006]

In order to achieve the above object, an image signal communication system according to the present invention is provided with an additional information memory for inputting and storing additional information other than the image signal before starting communication, and an image to be transmitted. Start the communication by inputting the data number counter that counts the number of signal encoded data at the same time when it is input from the host device, and the data number count value when a certain number of line-fractionated signal encoded data is input from the host device. A data amount calculation circuit that calculates the transmission amount of additional data that can be transmitted from the previously used current line speed and the processing capacity of the receiving device, and the transmission amount calculated by the data amount calculation circuit Consists of a transmission control circuit that adds additional information with the additional data amount at the beginning after the image signal encoded data for a certain number of lines according to the additional data amount Image signal transmitting device, a synchronous code detecting circuit that detects a synchronous code included in encoded data while receiving data from the transmitting device, and the number of lines of data input according to the number of detected synchronous codes. A line number counter for detecting a signal, an additional information detection circuit for notifying a selection signal of whether the input data is image signal coded data or additional information data, and a selection notified from the additional information detection circuit. If the data input according to the information is picture signal encoded data, the data selector to send to the decoding processing unit, and to the additional information control circuit if it is additional information, and the number of data added to the beginning of the input additional information An additional information control circuit for sending the additional information to the additional information memory in accordance with the above, and an image signal receiving device including an additional information memory for storing the additional information. Made, it is characterized by communicating the additional information other than image signals coded data when there is room in the line by the transmission capacity of the line being used for the compression ratio of the image signal encoded data to be transmitted.

[0007]

Next, a preferred embodiment of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing an embodiment of a picture signal communication system according to the present invention.

In FIG. 1, the transmitting device 1 stores the additional information signal 5 inside the device in accordance with the additional information input control signal 6 before starting the communication, and when the communication is started, the encoded image signal 3 is controlled by the image signal input. Following the output of the encoded image signal 3 to the line 7 when inputting in units of a certain number of lines in accordance with the signal 4, the additional information signal 5 having a data amount that does not affect communication is provided.
Is added to the beginning of the header containing the data number information and output. The receiver 2 mixes the data of the encoded image signal 3 and the additional information signal 5 input from the line 7 with a synchronization code included in the encoded image signal 3 and a header added to the head of the additional information signal 5. According to the picture signal output control signal 9 and simultaneously outputs the additional information 10 to the external apparatus according to the additional information output control signal 11. .

FIG. 2 is a block diagram showing an embodiment of the transmitter 1 shown in FIG.

Referring to FIG. 2, the additional information input control signal 6 is once input to the transmission control section 17 and then transmitted to the transmission control section 17.
Outputs a control signal 20 for accumulating the additional information to the additional information memory 12, and accumulates the additional information signal 5 in the additional information memory 12 before the start of communication. When communication is started, the encoded image signal 3 is input according to the image signal input control signal 4,
The transmission controller 17 stores the encoded image signal 3 in the image signal memory 13 by the control signal 19 according to the image signal input control signal 4.

At the same time, the transmission control section 17 counts the number of encoded data in the data number counter 14 according to the control signal 18 and outputs the number of data 23 to the data amount calculation circuit 16 and the transmission control section 17. When the coded image signal is received with a certain number of lines, the data amount calculation circuit 16 receives the number of data 23 and the line speed information 25 from the communication control unit 15.
According to the recording device capability information included in the control information 27 from the transmission control unit 17, the line speed, the recording device capability information, and the compression rate of the encoded image signal at the stage when a certain number of lines are input are used to perform encoding. The transmission data amount of the additional information that can be additionally transmitted after the image signal is calculated, and is output to the communication control unit 15 and the transmission control unit 17 as the transmittable data amount information 26.

The transmission control unit 17, which has received the transmittable data amount information 26, outputs the encoded image signal 22 from the image signal memory 13 to the communication control unit 15 in accordance with the control signal 19. When the coded image signals for a certain number of lines have been output, the transmission control unit 17 continues to read the additional information 21 accumulated in the additional information memory 12 according to the control signal 20 by the transmittable data amount and control the communication. It is output to the unit 15. The communication control unit 15 sends the coded image signal to the line 7 by a certain number of lines in accordance with the control signal 24 from the transmission control unit 17, and additionally outputs the additional information at the head and the transmittable data amount information as a header. To do.

FIG. 3 is a block diagram showing an embodiment of the receiving device 2 shown in FIG.

Referring to FIG. 3, the reception data in which the encoded image signal and the additional information received from the line 7 are mixed is divided into the communication control signal 39 and the reception data 38 by the communication control unit 28, and the communication control signal Reference numeral 39 denotes a reception control section 37, and reception data 38 denotes a synchronization code detection circuit 29 and a data selector 3.
2 is output. The synchronous code detection circuit 29 detects the synchronous code included in the encoded image signal of the received data, and outputs the synchronous code detection signal 40 to the line number counter 30.
The line number counter 30 detects the number of lines of the received data from the synchronous code detection signal 40, and outputs the number of lines 42 to the additional information detection circuit 31.

In the additional information detection circuit 31, the data received by the number of lines 42 is the control signal 4 from the reception control section 37.
When the number of lines specified by 9 is reached, a switching signal 43 for switching between the additional information and the image signal encoded data is output to the data selector 32. In accordance with the switching signal 43, the data selector 32 outputs the received data to the decoding processing unit 35 until it reaches a certain number of data lines, and when it reaches a certain number of lines, the additional information control circuit 3
Switch to 3.

The decoding processing section 35 performs decoding processing according to the control signal 47 from the reception control section 37 and outputs the image signal raw data 52 to the image signal memory 36. The image signal memory 36 stores the image signal raw data according to the control signal 53 from the reception control unit 37. The additional information control circuit 33 detects the data amount of the additional information transmitted from the header information added to the beginning of the input additional information, and the reception control unit 3
7 is notified of the additional information data amount 49, and the additional information 50 from which the header information has been deleted is output to the additional information memory 34.

When the additional information has been stored in the additional information memory 34, the reception controller 37 controls the switching signal 43 output from the additional information detection circuit 31 by the control signal 48 to switch the switching direction of the data selector 32. Is switched from the additional information control circuit 33 to the decoding processing unit 35.

[0019]

As described above, according to the present invention,
In a communication system in which the transmission speed of a communication line is determined on the assumption that image signals of multiple linear densities are transmitted, the amount of data is small and the line has a margin when transmitting low linear density information. By adding an additional information area to the compressed data that does not affect the communication speed and transmitting,
Information other than compressed data can be transmitted without affecting the communication time, and the effect that the line can be effectively utilized is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of an image signal communication system according to the present invention.

FIG. 2 is a block diagram showing an embodiment of the transmitter shown in FIG.

FIG. 3 is a block diagram showing an embodiment of the receiving apparatus shown in FIG.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Transmitting device 2 ... Receiving device 3 ... Encoded image signal 4 ... Image signal input control signal 5 ... Additional information signal 6 ... Additional information input control signal 7 ... Line 8 ... Image signal raw data 9 ... Image signal output control signal 10 ... Additional information 11 ... Additional information output control signal 12 ... Additional information memory 13 ... Image signal memory 14 ... Data counter 15 ... Communication control unit 16 ... Data amount calculation circuit 17 ... Transmission control unit 18 ... Control signal 19 ... Control signal 20 Control signal 21 ... Additional information 22 ... Encoded image signal 23 ... Data number 24 ... Control signal 25 ... Line speed information 26 ... Transmissible data amount information 27 ... Control signal 28 ... Communication control unit 29 ... Synchronous code detection circuit 30 ... Line number counter 31 ... Additional information detection circuit 32 ... Data selector 33 ... Additional information control circuit 34 ... Additional information memory 35 ... Decoding processing unit 36 ... Image signal Memory 37 ... Reception control unit 38 ... Reception data 39 ... Communication control signal 40 ... Synchronous code detection signal 41 ... Control signal 42 ... Line number 43 ... Switching signal 44 ... Reception data 45 ... Reception data 46 ... Control signal 47 ... Control signal 48 ... control signal 49 ... data amount 50 ... additional information 51 ... control signal 52 ... image signal raw data 53 ... control signal

Claims (4)

(57) [Claims] 1. When transmitting compressed data and additional information input from a computer or the like, the additional information is input and stored before the start of communication, and when the communication starts, compressed data for a unit of two-dimensional encoding And a synchronization code included in the compressed data while receiving the data from the transmission device by reading out the fixed amount of additional information stored every time the Is detected, the range of the compressed data is determined, the compressed data is output to the decompression processing unit, decompressed into image signal data, and the remaining data is stored in the memory as additional information to store the image signal raw data and the additional information. And a receiver for outputting the image signal coded data, the additional information other than the image signal coded data can be communicated when the line has a space due to the compression rate of the image signal coded data to be transmitted and the transfer capability of the line used. Image signal communication system characterized by. 2. The transmitting device simultaneously receives an additional information memory for inputting and storing additional information other than an image signal before starting communication and a number of image signal encoded data to be transmitted from a host device at the same time. The data number counter for counting and the line speed currently used, which was given in advance before the start of communication, by inputting the data number count value when a certain number of lines of the divided signal encoded data was input from the host device. A data amount calculation circuit that calculates the transmission amount of additional data that can be transmitted from the processing capacity of the receiving device, and image signal encoded data for a certain number of lines according to the additional data amount that can be transmitted calculated by the data amount calculation circuit The image signal communication system according to claim 1, further comprising: a communication control unit that adds and transmits additional information with an additional data amount at the beginning. 3. The synchronization code detection circuit for detecting a synchronization code contained in encoded data while receiving data from the transmission device, and the synchronization code detected by the synchronization code detection circuit. A line number counter that detects the number of lines of the input data according to the number of codes, and a selection signal indicating whether the input data is image signal encoded data or additional information data is notified based on the line number count value of the line number counter. When the data input by the additional information detection circuit and the selection information notified from the additional information detection circuit is image signal encoded data, it is sent to the decoding processing unit, and when it is additional information, it is sent to the additional information control circuit. A data selector, an additional information control circuit for sending the additional information to the additional information memory according to the number of data added at the head of the input additional information, and an additional information storage unit. The image signal communication system according to claim 1, further comprising an additional information memory. 4. The transmitting device simultaneously receives an additional information memory for inputting and storing additional information other than the image signal before starting communication and a number of image signal coded data to be transmitted from a host device at the same time. The data number counter to count and the data number count value when a certain number of lines of the divided signal encoded data are input from the host device are input, and the currently used line speed and reception given before the start of communication A data amount calculation circuit that calculates the transmission amount of additional data that can be transmitted from the processing capacity of the device, and a fixed number of lines of image signal encoded data that corresponds to the additional data amount that can be transmitted calculated by the data amount calculation circuit. And a communication control unit for adding and transmitting additional information with an additional data amount at the beginning, and the receiving device is configured to encode data while receiving data from the transmitting device. The sync code detection circuit that detects the sync code included in the data, the line number counter that detects the number of lines of the input data by the number of the detected sync code, and the input data by the line count value. An additional information detection circuit for notifying a selection signal of signal coded data or additional information data, and a decoding processing unit when the data input by the selection information notified from the additional information detection circuit is image signal coded data In the case of additional information, a data selector to send to the additional information control circuit, an additional information control circuit to send additional information to the additional information memory according to the number of data added at the head of the input additional information, and the additional information are stored. The image signal communication system according to claim 1, further comprising: