Method of error processing consisting of the transmission of dummy data if the reception memory is saturated

Claim 2

An apparatus according to claim 1, wherein said memory is utilized in a memory communication mode other than the error correction communication mode.

Claim 3

An apparatus according to claim 1, wherein when a data communication is performed in the error correction communication mode, a free capacity of said memory is detected, and an error correction communication is performed according to the free capacity of said memory.

Claim 4

An apparatus according to claim 1, further comprising means for reading an original, and wherein a storage operation of transmission data to said memory and transmission of data stored in said memory are asynchronously performed.

Claim 5

An apparatus according to claim 1, wherein when a re-send request is input, whether or not data requested to be re-sent are dummy data is detected, and data are re-sent on the basis of the detection result.

Claim 6

An apparatus according to claim 5, wherein when it is determined based on the detection result that data including image data are requested to be re-sent, image data are re-sent from said memory, and when it is determined based on the detection result that the dummy data are requested to be re-sent, dummy data are re-sent by a requested data amount.

Claim 7

A data communication apparatus having an error correction communication mode, comprising: a memory for storing data; and control means for discriminating a free capacity of said memory before a data communication, and controlling a communication sequence of an error correction communication according to the discrimination result, wherein said apparatus has at least first and second error correction communication modes, and said control means selects one of the first and second error correction communication modes according to the discrimination result of the free capacity of said memory, the first error correction communication mode is a mode for, when said memory has a free capacity corresponding to a predetermined data amount to be transmitted in the error correction communication mode, performing a normal error correction communication, and the second error correction communication mode is a mode for, when said memory does not have the free capacity corresponding to the predetermined data amount to be transmitted in the error correction communication mode, transmitting dummy data in addition to data stored in said memory.

Claim 8

An apparatus according to claim 7, wherein when a re-send request is input, said control means detects whether or not data requested to be re-sent are dummy data, and controls a re-send operation of data on the basis of the detection result.

Claim 9

An apparatus according to claim 8, wherein when it is determined based on the detection result that data including image data are requested to be re-sent, image data are re-sent from said memory, and when it is determined based on the detection result that the dummy data are requested to be re-sent, dummy data are re-sent by a requested data amount.

Claim 10

A data communication apparatus having an error correction communication mode in a half-duplex communication, comprising: a data storage memory used in the error correction communication mode; and control means for discriminating a free capacity of said memory before a data communication in the error correction communication mode, and controlling a communication sequence of an error correction communication according to the discrimination result, wherein said apparatus has at least first and second error correction communication modes, and said control means selects one of the first and second error correction communication modes according to the discrimination result of the free capacity of said memory, the first error correction communication mode is a mode for, when said memory has a free capacity corresponding to a predetermined data amount to be transmitted in the error correction communication mode, performing a normal error correction communication, and the second error correction communication mode is a mode for, when said memory does not have the free capacity corresponding to the predetermined data amount to be transmitted in the error correction communication mode, transmitting dummy data in addition to data stored in said memory.

Claim 11

An apparatus according to claim 10, wherein when a re-send request is input, said control means detects whether or not data requested to be re-sent are dummy data, and controls a re-send operation of data on the basis of the detection result.

Claim 12

An apparatus according to claim 11, wherein when it is determined based on the detection result that data including image data are requested to be re-sent, image data are re-sent from said memory, and when it is determined based on the detection result that the dummy data are requested to be re-sent, dummy data are re-sent by a requested data amount.

Claim 13

An apparatus according to claim 10, wherein said memory is used in a memory communication mode other than the error correction communication mode.

Claim 14

An error correction communication method of data in a half-duplex communication, comprising the steps of: discriminating a free capacity of a data storage memory used in an error correction communication before a data communication in the error correction communication mode; and controlling a communication sequence of an error correction communication according to the discrimination result, wherein said method has at least first and second error correction communication modes, and one of the first and second error correction communication modes is selected according to the discrimination result of the free capacity of said memory, the first error correction communication mode is a mode for, when said memory has a free capacity corresponding to a predetermined data amount to be transmitted in the error correction communication mode, performing a normal error correction communication, and the second error correction communication mode is a mode for, when said memory does not have the free capacity corresponding to the predetermined data amount to be transmitted in the error correction communication mode, transmitting dummy data in addition to data stored in said memory.

Claim 15

A data communication apparatus for performing an error correction communication of data in units of blocks each having a predetermined data amount, comprising: a data storage memory used in an error correction communication mode; and control means for discriminating, before a data communication in the error correction communication mode, whether or not a free capacity of said memory is not less than a data amount of one block, and controlling a communication sequence of the error correction communication according to the discrimination result, wherein said apparatus has at least first and second error correction communication modes, and said control means selects one of the first and second error correction communication modes according to the discrimination result of the free capacity of said memory, the first error correction communication mode is a mode for, when said memory has a free capacity not less than the data amount of one block, performing a normal error correction communication, and the second error correction communication mode is a mode for, when said memory does not have the free capacity not less than the data amount of one block, transmitting dummy bits in addition to data stored in said memory.

Claim 16

A data communication method having an error correction mode, comprising the steps of: discriminating a free capacity of a data storage memory used in the error correction communication mode before an error correction communication; and assuring, when a data amount to be transmitted in the error correction communication mode cannot be stored in said memory, the data amount by transmitting dummy data in addition to data stored in said memory.

Claim 17

A method according to claim 16, wherein said memory is utilized in a memory communication mode other than the error correction communication mode.

Claim 18

A method according to claim 16, wherein when a data communication is performed in the error correction communication mode, a free capacity of said memory is detected, and an error correction communication is performed according to the free capacity of said memory.

Claim 19

A method according to claim 16, wherein when a re-send request is input, whether or not data requested to be re-sent are dummy data is detected, and data are re-sent on the basis of the detection result.

Claim 20

A method according to claim 19, wherein when it is determined based on the detection result that data including image data are requested to be re-sent, image data are re-sent from said memory, and when it is determined based on the detection result that the dummy data are requested to be re-sent, dummy data are re-sent by a requested data amount.

Claim 21

A data communication method having an error correction communication mode, comprising the step of: assuring data for one block by generating dummy bits when data are to be transmitted in units of blocks each having a predetermined data amount, and an amount of the data is smaller than the predetermined data amount.

Claim 22

A method according to claim 21, wherein when an error re-send request is input, it is discriminated whether or data requested to be re-sent are dummy bits, and when it is determined that the data requested to be re-sent are dummy bits, dummy bits are re-sent; otherwise, image data are re-sent.

Claim 23

A data communication apparatus having a mode of operation in which it communicates data with error correction coding, the error correction coding being carried out on units of data of a predetermined size, the apparatus when in the said mode of operation taking account of the amount of memory available for storing data in error correction code processing in an at least one of itself and an apparatus with which it is in communication, and if the available amount of memory is less than the size of a said unit of data it communicates with error correction coding in units of data of the predetermined size which units contain an amount of data to be communicated consistent with the available amount of memory together with fill-in data to provide the required data unit size.

Claim 24

A data communication method comprising: determining an amount of available memory; and if the determined amount is insufficient to store the data for a unit of predetermined size in error correction code processing, communicating data with error correction codes in units of the predetermined size which units contain an amount of data to be communicated consistent with the determined amount of available memory together with fill-in data.