Wireless receiving apparatus and method therefor

• US 6,545,709 B2
• Filed: 09/02/1997
• Issued: 04/08/2003
• Est. Priority Date: 09/02/1996
• Status: Expired due to Term

• Current Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Original Assignee: Canon Ayutthaya Limited (Canon Inc.)
• Inventors: Maeda, Masamine, Takei, Hirofumi
• Primary Examiner(s): Vu, Ngoc-Yen, VU, NGOC YEN T
• Application Number:
  US08/921,570
• Publication Number:
  US 20020057350A1
• Time in Patent Office: 2,044 Days
• Field of Search: H04/N.5228, 348/143, 348/207, 348/207.99, 348/211.99, 348/211.1, 348/211.2, 348/222.1, 348/231.99, 348/231.7, 348/231.9, 348/723, 348/724, 348/725, 348/728, 714/708, 714/701, 382/232, 382/236, 386/95, 386/108-111, 386/113, 386/117
• US Class Current: 348/222.1
• CPC Class Codes: G11B 31/006 with video camera or receiver
• CPC Class Codes: H04N 5/77 between a recording apparatus and a television camera
• CPC Class Codes: H04N 5/775 between a recording apparatus and a television receiver
• CPC Class Codes: H04N 9/8047 using transform coding

Abstract

A wireless reception apparatus detects the reception status of a wireless transmitted information signal and counts the time of continuation of a predetermined inferior reception status according to the result of detection. The wireless reception apparatus further terminates the recording operation of a recording unit in case the counted time of continuation reaches a predetermined value. Such control of the recording operation according to the reception status of the received signal allows to suppress the wasted use of the recording medium and to lower the wasted electric power consumption.

Claims

1. A recording system, comprising:

a wireless receiver that receives image data;

a detector that detects whether a reception status of image data received by said wireless receiver is inferior; and

a recorder that (i) records image data received by said wireless receiver if said detecter does not detect that a reception status of the image data received by said wireless receiver is inferior, (ii) records image data previously stored in a memory in lieu of image data received by said wireless receiver if said detector detects that the reception status of the image data received by said wireless receiver is inferior, and (iii) stops recording of the image data stored in the memory if recording of the image data stored in the memory is continued for a predetermined period of time.

2. A recording system according to claim 1, wherein said detector detects the reception status of the image data by detecting an error condition of the image data.

3. A recording system according to claim 1, wherein said wireless receiver receives image data transmitted from an imaging device.

4. A recording system according to claim 1, wherein the image data stored in the memory is image data previously received by said wireless receiver, before said detector detects that the reception status of image data received by said wireless receiver is inferior.

5. A recording system according to claim 1, further comprising an alarm that generates warning information if recording of the image data stored in the memory is continued for the predetermined period of time.

6. A recording system according to claim 1, wherein said wireless receiver receives image data that is modulated according to a spread spectrum modulation.

7. A recording method, comprising the steps of:

receiving image data by a wireless receiver;

detecting whether a reception status of image data received in the receiving step is inferior;

recording the image data received in the receiving step if in the detecting step the reception status of the image data received in the receiving step is not detected to be inferior;

recording image data previously stored in a memory in lieu of image data received in the receiving step if in said detecting step it is detected that a reception status of image data received in said receiving step is inferior; and

stopping the recording step of recording image data previously stored in the memory if recording of image data previously stored in the memory is continued for a predetermined period of time.

8. A method according to claim 7, wherein said detecting step includes detecting a reception status of image data by detecting an error condition of the image data.

9. A method according to claim 7, wherein said receiving step includes receiving image data transmitted from an imaging device.

10. A method according to claim 7, wherein the image data previously stored in the memory is image data received before it is detected in said detecting step that the reception status of image data received in said receiving step is inferior.

11. A method according to claim 7, further comprising a step of generating warning information if the recording of image data previously stored in the memory is continued for the predetermined period of time.

12. A method according to claim 7, wherein said receiving step includes receiving image data that is modulated according to a spread spectrum modulation.