Data output apparatus and data input apparatus

• US 20050188124A1
• Filed: 02/18/2005
• Published: 08/25/2005
• Est. Priority Date: 02/25/2004
• Status: Active Grant

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Koyama, Shinichi
• Granted Patent: US 7,624,200 B2
• Time in Patent Office: Days
• US Class Current: 710/33
• CPC Class Codes: H04N 5/765 Interface circuits between an apparatus for recording and another apparatus
• CPC Class Codes: H04N 5/772 the recording apparatus and the television camera being placed in the same enclosure
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 9/7921 for more than one processing mode
• CPC Class Codes: H04N 9/8042 involving data reduction

Abstract

A data output apparatus such as a digital video camera and the like comprises: a receiving unit, which receives a command which requests that output means is set into a state locked to a predetermined data format; a setting unit, which sets the output means to a state locked to the predetermined data format in accordance with the command; and a storage unit, which stores information for identifying a control apparatus which transmits the command, wherein once the output means is set to a state locked to the predetermined data format in accordance with the command, and after that, the output means is not set to a state not locked to the predetermined data format in accordance with a command from other than the control apparatus.

Claims

1. A data output apparatus comprising:

a receiving unit, arranged to receive a command which requests that output means is set into a state locked to a predetermined data format;

a setting unit, arranged to set said output means into a state locked to said predetermined data format in accordance with said command; and

a storing unit, arranged to store information for identifying a control apparatus which transmits said command,

wherein once said output means is set into a state locked to said predetermined data format in accordance with said command, said output means is not set into a state not locked to said predetermined data format in accordance with a command from other than said control apparatus.

2. The data output apparatus according to claim 1, wherein said output means is a logical output terminal.

3. The data output apparatus according to claim 1, wherein said output means is an oPCR defined by IEC 61883-1.

4. A control method of controlling a data output apparatus, comprising steps of:

receiving a command which requests that output means is set into a state locked to a predetermined data format;

setting said output means into a state locked to said predetermined data format in accordance with said command;

storing information for identifying a control apparatus which transmits said command in a storage unit; and

avoiding setting said output means into a state not locked to said predetermined data format in accordance with a command from other than said control apparatus, after said output means is set into a state locked to said predetermined data format in accordance with said command.

5. The control method according to claim 4, wherein said output means is a logical output terminal.

6. The control method according to claim 4, wherein said output means is an oPCR defined by IEC 61883-1.

7. A data output apparatus comprising:

a receiving unit, arranged to receive a command which requests that output means is set into a state locked to a predetermined data format;

a setting unit, arranged to set said output means into a state locked to said predetermined data format in accordance with said command; and

a storing unit, arranged to store information for identifying a control apparatus which transmits said command;

wherein once said output means is set into a state locked to said predetermined data format in accordance with said command, said output means is not set into a state locked to a data format other than said predetermined data format in accordance with a command from other than said control apparatus.

8. The data output apparatus according to claim 7, wherein said output means is a logical output terminal.

9. The data output apparatus according to claim 7, wherein said output means is an oPCR defined by IEC 61883-1.

10. A control method of controlling a data output apparatus, comprising steps of:

receiving a command which requests that output means is set into a state locked to a predetermined data format;

setting said output means into a state locked to said predetermined data format in accordance with said command;

storing information for identifying a control apparatus which transmits said command in a storage unit; and

avoiding setting said output means into a state locked to a data format other than said predetermined data format in accordance with a command from other than said control apparatus, after said output means is set into a state locked to said predetermined data format in accordance with said command.

11. The control method according to claim 10, wherein said output means is a logical output terminal.

12. The control method according to claim 10, wherein said output means is an oPCR defined by IEC 61883-1.

13. A data input apparatus comprising:

a receiving unit, arranged to receive a command which requests that input means is set into a state locked to a predetermined data format;

a setting unit, arranged to set said input means into a state locked to said predetermined data format in accordance with said command; and

a storing unit, arranged to store information for identifying a control apparatus which transmits said command;

wherein once said input means is set into a state locked to said predetermined data format in accordance with said command, said input means is not set into a state not locked to said predetermined data format in accordance with a command from other than said control apparatus.

14. The data input apparatus according to claim 13, wherein said input means is a logical input terminal.

15. The data input apparatus according to claim 13, wherein said input means is an iPCR defined by IEC 61883-1.

16. A control method of controlling a data input apparatus, comprising steps of:

receiving a command which requests that input means is set into a state locked to a predetermined data format;

setting said input means into a state locked to said predetermined data format in accordance with said command;

storing information for identifying a control apparatus which transmits said command in a storage unit; and

avoiding setting said input means into a state not locked to said predetermined data format in accordance with a command from other than said control apparatus, after said input means is set into a state locked to said predetermined data format in accordance with said command.

17. The control method according to claim 16, wherein said input means is a logical input terminal.

18. The control method according to claim 16, wherein said input means is an iPCR defined by IEC 61883-1.

19. A data input apparatus comprising:

a receiving unit, arranged to receive a command which requests that input means is set into a state locked to a predetermined data format;

a setting unit, arranged to set said input means into a state locked to said predetermined data format according to said command; and

a storing unit, arranged to store information for identifying a control apparatus which transmits said command;

wherein once said input means is set into a state locked to said predetermined data format in accordance with said command, said input means is not set to a state locked to a data format other than said predetermined data format in accordance with the command from other than said control apparatus.

20. The data input apparatus according to claim 19, wherein said input means is a logical input terminal.

21. The data input apparatus according to claim 19, wherein said input means is an iPCR defined by IEC 61883-1.

22. A control method of controlling a data input apparatus, comprising steps of:

receiving a command which requests that input means is set into a state locked to a predetermined data format;

setting said input means into a state locked to said predetermined data format in accordance with said command;

storing information for identifying a control apparatus which transmits said command in a storage unit; and

avoiding setting said input means into a state locked to a data format other than said predetermined data format in accordance with a command from other than said control apparatus, after said input means is set into a state locked to said predetermined data format in accordance with said command.

23. The control method according to claim 22, wherein said input means is a logical input terminal.

24. The control method according to claim 22, wherein said input means is an iPCR defined by IEC 61883-1.