Data transfer device and data transfer method having a shorter time interval between pieces of final transfer data in a frame image

• US 10,452,583 B2
• Filed: 11/16/2017
• Issued: 10/22/2019
• Est. Priority Date: 06/15/2015
• Status: Active Grant

• Current Assignee: Olympus Corporation
• Original Assignee: Olympus Corporation
• Inventors: Tanaka, Yoshinobu, Ueno, Akira
• Primary Examiner(s): Shyu, Jing-Yih
• Application Number:
  US15/814,879
• Publication Number:
  US 20180081842A1
• Time in Patent Office: 705 Days
• CPC Class Codes: G06F 13/1673 using buffers
• CPC Class Codes: G06F 13/3625 using a time dependent access
• CPC Class Codes: G06F 13/38 Information transfer, e.g. on bus G06F13/14 takes precedence
• CPC Class Codes: G06F 13/4022 using switching circuits, e.g. switching matrix, connection or expansion network G06F13/4009 takes precedence
• CPC Class Codes: G06F 13/42 Bus transfer protocol, e.g. handshake; Synchronisation
• CPC Class Codes: G06F 13/4282 on a serial bus, e.g. I2C bus, SPI bus on daisy chain buses G06F13/4247
• CPC Class Codes: H04N 1/00 Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof

Abstract

A data transfer device including a buffer unit configured to temporarily store transfer data that is transferred to a common bus, a write control unit configured to write input data as the transfer data to the buffer unit, a read control unit configured to read the transfer data from the buffer unit, an interface unit configured to transfer the transfer data to the common bus according to a predetermined bus protocol, the transfer data being read from the buffer unit by the read control unit, and a band-smoothing unit configured to smooth a band of the common bus by switching between the time intervals between pieces of the transfer data based on a position of the transfer data in a frame image, during a period when the transfer data is transferred to the common bus based on a position of the transfer data in a frame image.

Claims

1. A data transfer device, comprising:

a buffer unit configured to temporarily store transfer data that is transferred to a common bus, the transfer data being used for forming a frame image;

a write control unit configured to write input data as the transfer data to the buffer unit;

a read control unit configured to read the transfer data from the buffer unit;

an interface unit configured to transfer the transfer data to the common bus according to a predetermined bus protocol, the transfer data being read from the buffer unit by the read control unit; and

a band-smoothing unit configured to smooth a band of the common bus,

wherein the band-smoothing unit includes a first parameter corresponding to a time interval between pieces of the transfer data when the transfer data except final transfer data included in the frame image is transferred to the common bus, and a second parameter corresponding to the time interval when the final transfer data is transferred to the common bus,

wherein the band-smoothing unit sets the time interval using the first parameter when the position of the transfer data in the frame image is a position of transfer data other than the final transfer data,

wherein the band-smoothing unit sets the time interval using the second parameter when the position of the transfer data in the frame image is a position of the final transfer data; and

wherein the time interval that is set using the second parameter is shorter than the time interval that is set using the first parameter.

2. The data transfer device according to claim 1, further comprising:

a determination unit configured to determine a remaining capacity of the buffer unit,

wherein the band-smoothing unit adjusts the time interval in accordance with the remaining capacity of the buffer unit determined by the determination unit.

3. A data transfer device, comprising:

a buffer unit configured to temporarily store transfer data that is transferred to a common bus, the transfer data being used for forming a frame image;

a write control unit configured to write input data as the transfer data to the buffer unit;

a read control unit configured to read the transfer data from the buffer unit;

an interface unit configured to transfer the transfer data to the common bus according to a predetermined bus protocol, the transfer data being read from the buffer unit by the read control unit;

a band-smoothing unit configured to smooth a band of the common bus by setting a time interval between pieces of final transfer data in the frame image to be shorter than the time interval between pieces of the transfer data except for the final transfer data in the frame image; and

a determination unit configured to determine a remaining capacity of the buffer unit,

wherein the band-smoothing unit adjusts the time interval in accordance with the remaining capacity of the buffer unit determined by the determination unit, and

wherein the band-smoothing unit decreases the time interval as the remaining capacity of the buffer unit is small.

4. A data transfer method, comprising:

temporarily storing transfer data that is transferred to a common bus by a buffer unit, the transfer data being used for forming a frame image;

writing input data as the transfer data to the buffer unit;

reading the transfer data from the buffer unit;

transferring the transfer data to the common bus according to a predetermined bus protocol, the transfer data being read from the buffer unit during; and

smoothing a band of the common bus,

wherein a first parameter corresponding to a time interval between pieces of the transfer data when the transfer data except final transfer data included in the frame image is transferred to the common bus, and a second parameter corresponding to the time interval when the final transfer data is transferred to the common bus are used when smoothing the band of the common bus,

wherein the time interval is set by using the first parameter when the position of the transfer data in the frame image is a position of transfer data other than the final transfer data,

wherein the time interval is set by using the second parameter when the position of the transfer data in the frame image is a position of the final transfer data; and

wherein the time interval that is set using the second parameter is shorter than the time interval that is set using the first parameter.