EP0649252A2
Expired / Lapsed
EP
⏱️ 0.0 years remaining
Video camera using a serial communication between the control and the processing circuits
Assignee: Canon Inc
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Filing: 1994-10-14
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Granted: —
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Expires: 2014-10-14
Abstract
Abstract A video camera is provided with a processing circuit for processing a picked-up image signal outputted from an image sensor, a control circuit for controlling an image pickup action by transferring signals with the processing circuit, a serial communication circuit disposed between the control circuit and the processing circuit for controlling the transfer of signals between the control circuit and the processing circuit. The video camera is also provided with a change-over circuit for changing over an order of transmission of communication data within one unit to be transmitted by the serial communication circuit and/or a speed change-over circuit for changing over the speed of data transmission by effecting the data transmission at different speeds on either side of a buffer disposed midway in the serial communication circuit and arranged to store signal data.
Inventors
- 👤 Hirofumi Suda
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-08 15:14
CPC Classifications
H; H04; H04N; H04N23/00; H04N23/60; H04N23/665
Claims Analysis
Total Claims: 28
Claim 1
Independent Claim
88 words
A video camera comprising: processing means for processing a picked-up image signal outputted from image pickup means; control means for controlling an image pickup action of said image pickup means by transferring signals with said processing means; serial communication means disposed between said control means and said processing means for controlling the transfer of signals between said processing means and said control means; and change-over means for changing over an order of transmission of communication data within one block unit to be transmitted by said serial communication means.
Claim 2
Dependent Claim
48 words
A video camera according to claim 1, wherein said control means is arranged to send, by using said serial communication means, to said processing means, address information and control information indicative of inputting of data and to receive, from said processing means, data formed by said processing means.
Claim 3
Dependent Claim
68 words
A video camera according to claim 2, wherein the address information is provided for selecting from a plurality of functions of said processing means a function to be carried out, the control information is provided for indicating an action to be carried out by the function selected, and the data from said processing means is output data formed as a result of the action of the function selected.
Claim 4
Dependent Claim
27 words
A video camera according to claim 3, wherein said control means is a microcomputer arranged to control the video camera on the basis of said output data.
Claim 5
Dependent Claim
20 words
A video camera according to claim 4, wherein the plurality of functions of said processing means include focus detecting means.
Claim 6
Dependent Claim
20 words
A video camera according to claim 4, wherein the plurality of functions of said processing means include light measuring means.
Claim 7
Dependent Claim
41 words
A video camera according to claim 5, wherein the control information is provided for indicating a focus detecting position within an image plane, and the data from said processing means is a focus detecting signal obtained in the focus detecting position.
Claim 8
Dependent Claim
41 words
A video camera according to claim 6, wherein the control information is provided for indicating a light measuring position within an image plane, and the data from said processing means is a measured light value obtained in the light measuring position.
Claim 9
Dependent Claim
44 words
A video camera according to claim 1, wherein said change-over means is arranged to change over the order of transmission of the communication data between the transmission beginning with the MSB of the data and the transmission beginning with the LSB of the data.
Claim 10
Dependent Claim
130 words
A video camera comprising: processing means for processing a picked-up image signal outputted from image pickup means; control means for controlling an image pickup action of said image pickup means by transferring signals with said processing means; serial communication means disposed between said control means and said processing means for controlling the transfer of signals between said processing means and said control means; buffer means disposed midway in said serial communication means and arranged to store signal data; and speed change-over means for changing over the speed of data transmission by making the speed of data transmission to be effected on the side of said control means relative to said buffer means different from the speed of data transmission to be effected on the side opposite to said control means.
Claim 11
Dependent Claim
48 words
A video camera according to claim 10, wherein said control means is arranged to send, by using said serial communication means, to said processing means, address information and control information indicative of inputting of data and to receive, from said processing means, data formed by said processing means.
Claim 12
Dependent Claim
68 words
A video camera according to claim 11, wherein the address information is provided for selecting from a plurality of functions of said processing means a function to be carried out, the control information is provided for indicating an action to be carried out by the function selected, and the data from said processing means is output data formed as a result of the action of the function selected.
Claim 13
Dependent Claim
27 words
A video camera according to claim 11, wherein said control means is a microcomputer arranged to control the video camera on the basis of said output data.
Claim 14
Dependent Claim
20 words
A video camera according to claim 13, wherein the plurality of functions of said processing means include focus detecting means.
Claim 15
Dependent Claim
20 words
A video camera according to claim 13, wherein the plurality of functions of said processing means include light measuring means.
Claim 16
Dependent Claim
41 words
A video camera according to claim 14, wherein the control information is provided for indicating a focus detecting position within an image plane, and the data from said processing means is a focus detecting signal obtained in the focus detecting position.
Claim 17
Dependent Claim
41 words
A video camera according to claim 15, wherein the control information is provided for indicating a light measuring position within an image plane, and the data from said processing means is a measured light value obtained in the light measuring position.
Claim 18
Dependent Claim
54 words
A video camera according to claim 10, wherein the data transmission to be effected on the side of said control means relative to said buffer means is driven by a clock which differs from a clock by which the data transmission to be effected on the side opposite to said control means is driven.
Claim 19
Dependent Claim
55 words
A video camera according to claim 18, further comprising a first clock provided for the data transmission between said control means and said buffer means, and a second clock provided for the data transmission between said buffer means and said processing means, at least one of said first and second clocks being an external clock.
Claim 20
Dependent Claim
57 words
A signal processing integrated circuit for a video camera, comprising: processing means for processing a picked-up image signal; serial communication means for transferring signals between said processing means and an external control means; and change-over means for changing over an order of transmission of communication data within one unit to be transmitted by said serial communication means.
Claim 21
Dependent Claim
15 words
An integrated circuit according to claim 20, wherein said processing means includes focus detecting means.
Claim 22
Dependent Claim
15 words
An integrated circuit according to claim 20, wherein said processing means includes light measuring means.
Claim 23
Dependent Claim
43 words
An integrated circuit according to claim 20, wherein said change-over means is arranged to change over the order of transmission of communication data between the transmission beginning with the MSB of the data and the transmission beginning with the LSB of the data.
Claim 24
Dependent Claim
80 words
A signal processing integrated circuit for a video camera, comprising: processing means for processing a picked-up image signal; serial communication means for transferring signals between said processing means and an external control means; buffer means disposed midway in said serial communication means and arranged to store signal data; and speed change-over means capable of varying the speed of data transmission between the transmission to be effected before said buffer means and the transmission to be effected after said buffer means.
Claim 25
Dependent Claim
15 words
An integrated circuit according to claim 24, wherein said processing means includes focus detecting means.
Claim 26
Dependent Claim
15 words
An integrated circuit according to claim 24, wherein said processing means includes light measuring means.
Claim 27
Dependent Claim
54 words
An integrated circuit according to claim 24, wherein the data transmission to be effected on the side of said control means relative to said buffer means is driven by a clock which differs from a clock by which the data transmission to be effected on the side opposite to said control means is driven.
Claim 28
Dependent Claim
55 words
An integrated circuit according to claim 27, further comprising a first clock provided for the data transmission between said control means and said buffer means, and a second clock provided for the data transmission between said buffer means and said processing means, at least one of said first and second clocks being an external clock.
References Cited (Backward Citations)
No citation records indexed.
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