JP2502800B2 - Image communication device - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an image communication apparatus having a recording means having a recording speed slower than a communication speed and having only one encoding / decoding means.

2. Description of the Related Art Conventionally, as shown in FIG.
An NCU 1 for interfacing with, a modem 2 for modulating / demodulating an image signal, a CODEC 3 for encoding / decoding image information, an image memory 4 for storing image information, a printer 5 for recording image information, and an operator specifying a destination. When the printer 5 having a slow recording speed such as an inkjet printer is used as the printer 5, which has an operation panel unit 6 for performing the above and the like, and a reading unit 7 for receiving an original, the NCU 1 receives the data because the printer 5 cannot keep up with the real-time reception. The image information is demodulated by the modem 2 and decoded by the CODEC 3, then further coded by the CODEC 3 and sequentially stored in the image memory 4, and the transmitted image information is decoded by the CODEC 3 after receiving all pages. It is normal that the data is converted into a printout and printed by the printer 5.

However, according to such a configuration, a huge storage means is required to receive all pages of the received image information, which is unknown how many pages are transmitted, and the encoding / decoding means is required. Since there is only one, the encoding / decoding means is occupied by the reception and recording is not possible during reception, and further, since only one encoding / decoding means is provided, a plurality of received images are recorded. While there was a problem, the next reception could not be received.

The present invention has been made in view of the above problems, and has a slower recording speed than a communication speed, and does not require a huge storage means even if it has only one encoding / decoding means, and a receiving operation, An object of the present invention is to provide an image communication device capable of recording operation.

Means for Solving the Problems In order to solve the above-mentioned problems, the present invention provides a method for encoding and decoding received image information by a code decoding means,
The received encoded form is stored in the storage means as it is, the error is checked by the code decoding means at the end of the page, and the image information stored by the code decoding means is decoded except during the error check. It is configured to record as a record.

Action The present invention has the above-described configuration, in which the image information stored by the encoding / decoding means is decoded and recorded except during the error check without using the encoding / decoding means for receiving and storing the image information. In addition, since the receiving and recording can be performed in parallel by one encoding / decoding means, the receiving operation can be performed without requiring a huge storage means.

Embodiments Embodiments of the present invention will be described below with reference to the drawings. First
FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus showing an embodiment of the present invention. 8 is a buffer memory for temporarily storing image information, 9 is an RTC for detecting an RTC signal transmitted together with the image information. Detection unit, 10 is NCU1, modem 2,
A communication control unit that controls the buffer memory 8 and the RTC detection unit 9, 11 is a system control unit that controls the image memory 4 and CODEC 3, and 12 is the transmitted image information of one page reduced to the cut sheet size in the sub-scanning direction. It is a reduction unit. 13 is the reduction section
12. A recording control unit that controls the printer 5. The same members as those in the conventional example use the same members as those in the conventional example.

The reception operation of the facsimile apparatus of the present invention will be described below. 2 is a flow chart showing the operation of the communication control unit 10, FIG. 3 is a flow chart showing the operation of the system control unit 11, and FIGS. 4A, 4B, and 4C are the recording control unit 13, respectively. FIG. 6 is a flowchart showing operations related to print interruption, print start, and print restart.

When a call is received from the partner machine, the line is connected, control signals are exchanged, and the communication mode is set with the partner machine, image information is sent from the partner machine, the image information passes through the NCU1, and the modem 2 The image data is demodulated in step S4, is passed through the buffer memory 8 and the RTC detector 9, and is stored in the image memory 4 as it is in the encoding method sent from the other device (S1a, S1b). The RTC detection unit 9 constantly detects whether or not the image information sent includes an RTC signal indicating the end of one page (S2). When the RTC signal is detected, the communication control unit 10 controls the system. An error check of the image information transmitted to the unit 11 is requested (S3). When there is an error check request, the system control unit 11 confirms with the recording control unit 13 whether a recording operation is in progress. If the previously received image information is being recorded because the recording speed of the printer 5 is slow, or if the previously received image information is being recorded due to line reception, the recording control unit 13
Request print interruption (S5). When there is a print interruption request, the recording control unit 13 interrupts the decoding to the CODEC3 at the time when the decoding of the image information of one line being decoded is finished, and the final line decoded by the CODEC3 is stored, and the decoding operation is performed. Prepare for the resumption of. The reduction unit 12 reduces the decoded image information before the operation of the CODEC 3 is interrupted and transfers it to the printer 5 (S7), and also stores which line the final line is (S8). When the operation related to the recording interruption process is completed,
The recording control unit 13 notifies the system control unit 11 that the recording interruption process has been completed (S9). Upon receiving this completion notification, the system control unit 11 starts error check processing with CODEC3 (S11). When the error check processing for one page is completed, the system control unit 11 notifies the communication control unit 10 of the number of error lines included in the image information for one page (S1
2). The communication control unit 10 informs the transmitting side of the quality of reception by a post message based on the notified error line number (S13). Further, when the system control unit 11 completes the error check process for one page, it notifies the recording control unit 13 of the number of TOTAL lines counted for the reduction process of the checked page (S12). Next, the system control unit 11 shifts to the recording operation when the error check processing is completed.
When the system control unit 11 performs the error check interrupt process, it is determined whether the recording control unit 13 is in the process of recording (whether printing was interrupted in the middle of one page due to the error check interrupt process) (S13). ).

If the printing is not interrupted, the system control unit 11 requests the recording control unit 13 to start printing the received data (S14), instructs the CODEC 3 to restart the decoding process (S15), and controls the recording. The section 13 reduces the received data to be decrypted by the reduction section 12 and transfers it to the printer 5 (S16).
The recording control unit 13 checks whether the transferred recording data is the last line of one page (S17). If the last line cannot be detected, the recording process is continued, and if the last line is detected, the system control is performed. The end of printing is notified to the section 11.

If printing was interrupted, system control unit 11
Requests the recording controller 13 to restart printing the received data (S18), loads the last line already recorded into CODEC3 (S19), and decodes the last line loaded (S2).
0). When the decoding of this final line is completed (S21 YE
S) to resume recording and start decoding on the next line (S2
2), the recording control unit 13 reduces the received data to be decoded by the reduction unit 1
Reduction processing is performed in 2 and the data is transferred to the printer 5 (S23). The recording control unit 13 checks whether the recording data to be transferred is the last line of one page (S24). If the last line cannot be detected, the recording process is continued, and if the last line is detected, the system control is performed. The end of printing is notified to section 11 (S25).

As described above, the printing is performed regardless of whether the printing has been interrupted or not, and the system control unit 11 receives the print end notification from the recording control unit 13 and returns to the standby state.

EFFECTS OF THE INVENTION As is clear from the above description, according to the present invention, the received image information is stored in the storage unit in the received encoding form as it is without being encoded by the encoding / decoding unit. At the end, the encoding / decoding means performs an error check, and the image information stored in the encoding / decoding means is decoded and recorded except during the error check. Since the image information stored by the code decoding means is decoded and recorded except during error checking without using the decoding means, one code decoding means can perform reception and recording in parallel. Therefore, the receiving operation can be performed without requiring a huge storage means.

[Brief description of drawings]

FIG. 1 is a block diagram showing a schematic configuration of a facsimile apparatus showing an embodiment of the present invention, FIG. 2 is a flow chart showing the operation of the communication control unit 5, and FIG. 3 shows the operation of the system control unit 8. FIG. 4 is a flow chart showing FIG.
(B) and (c) are flowcharts showing the operations of the recording controller 13 for interrupting printing, starting printing, and restarting printing, respectively. FIG. 5 is a block diagram showing a schematic configuration of a conventional facsimile apparatus. 1 ... NCU, 2 ... modem, 3 ... CODEC, 4 ... image memory, 5
... printer, 8 ... buffer memory, 9 ... RTC detector, 10
... communication control unit, 11 ... system control unit, 12 ... reduction unit, 13 ...
Recording control unit.

Claims (1)

(57) [Claims] 1. A receiving means for receiving transmitted image information, an RTC detecting means for detecting an RTC signal included in the transmitted image information, and an encoding for receiving the image information from the receiving means. A storage unit for storing the image data as it is, a code decoding unit for decoding the image information stored in the storage unit, a recording unit for recording the image information decoded by the code decoding unit, When the RTC signal is detected, the decoding process for outputting to the recording unit is interrupted, the decoding process for detecting the line error is performed, and the interrupted decoding process is performed after the detection of the line error is completed. An image communication apparatus comprising: a control unit that controls the encoding / decoding unit to restart the encoding / decoding unit.