Data communication apparatus, data communication system, data communication method and storage medium

• US 7,275,255 B2
• Filed: 08/10/1999
• Issued: 09/25/2007
• Est. Priority Date: 08/11/1998
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Suzuki, Yasutomo, Suda, Hirofumi
• Primary Examiner(s): VU, NGOC K
• Application Number:
  US09/371,537
• Publication Number:
  US 20030134590A1
• Time in Patent Office: 2,968 Days
• Field of Search: 455/6.3,3.1,3.06 348/6,8,552,13-15,17,143,207,211.2,211.3,207.1 725/62,81,78,80,82,141,153 370/401 386/46,112,109,125,131
• US Class Current: 725/80
• CPC Class Codes: H04L 12/40052 High-speed IEEE 1394 serial bus bus transfer protocol on a daisy chain bus using an embedded synchronisation G06F13/426
• CPC Class Codes: H04L 12/40097 Interconnection with other networks LAN interconnection over a bridge based backbone H04L12/462; single bridge functionality H04L12/462
• CPC Class Codes: H04L 12/6418 Hybrid transport
• CPC Class Codes: H04L 69/08 Protocols for interworking; Protocol conversion
• CPC Class Codes: H04L 69/085 specially adapted for interworking of IP-based networks with other networks

Abstract

A communication apparatus includes a wireless communication unit which receives first encoded video data encoded by a first video encoding system from the first apparatus through a wireless network; a decoding unit which decodes the first encoded video data to provide decoded video data; an encoding unit which encodes the decoded video data into second encoded video data using a second video encoding system; and a wired communication unit which transmits the second encoded video data to the second apparatus through a wired network. The first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus. The second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus. The first video encoding system uses a video encoding different from MPEG encoding. The second video encoding system uses MPEG encoding.

Claims

1. A communication system comprising:

a first apparatus in a wireless network;

a second apparatus in a wired network; and

a communication apparatus that includes a wireless communication unit, a decoding unit, an encoding unit, and a wired communication unit,

wherein the wireless communication unit receives first encoded video data encoded by a first video encoding system from the first apparatus through the wireless network,

wherein the decoding unit decodes the first encoded video data received by the wireless communication unit to provide decoded video data,

wherein the encoding unit encodes the decoded video data into second encoded video data using a second video encoding system,

wherein the wired communication unit transmits the second encoded video data to the second apparatus through the wired network,

wherein the first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus, and the second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus, and

wherein the first video encoding system uses a video encoding different from MPEG encoding, and the second video encoding system uses MPEG encoding.

2. A communication system according to claim 1, wherein the first apparatus is a video camera, and the second apparatus is an apparatus adapted to record the second encoded video data on a recording medium.

3. A communication system according to claim 1, wherein the first apparatus is a video camera, and the second apparatus is an apparatus adapted to display the second encoded video data.

4. A communication system according to claim 1, wherein the wired communication unit is adapted to transmit the second encoded video data using an isochronous transfer.

5. A communication system according to claim 1, wherein the first video encoding system uses H.263 and the second video encoding system uses MPEG encoding.

26. A communication system according to claim 5, wherein the MPEG encoding is MPEG1 encoding.

6. A communication apparatus comprising:

a wireless communication unit which receives first encoded video data encoded by a first video encoding system from the first apparatus through a wireless network;

a decoding unit which decodes the first encoded video data received by the wireless communication unit to provide decoded video data;

an encoding unit which encodes the decoded video data into second encoded video data using a second video encoding system; and

a wired communication unit which transmits the second encoded video data to the second apparatus through a wired network,

wherein the first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus, and the second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus, and

wherein the first video encoding system uses a video encoding different from MPEG encoding, and the second video encoding system uses MPEG encoding.

7. A communication apparatus according to claim 6, wherein the first apparatus is a video camera, and the second apparatus is an apparatus adapted to record the second encoded video data on a recording medium.

8. A communication apparatus according to claim 6, wherein the first apparatus is a video camera, and the second apparatus is an apparatus adapted to display the second encoded video data.

9. A communication apparatus according to claim 6, wherein the wired communication unit is adapted to transmit the second encoded video data using an isochronous transfer.

10. A method for controlling a communication apparatus, the communication apparatus including (a) a wireless communication unit which communicates with a first apparatus through a wireless network and (b) a wired communication unit which communicates with a second apparatus through a wired network, the method comprising the steps of:

receiving first encoded video data encoded by a first video encoding system from the first apparatus using the wireless communication unit;

decoding the first encoded video data received in the receiving step to provide decoded video data;

encoding the decoded video data into second encoded video data using a second video encoding system; and

transmitting the second encoded video data to the second apparatus using the wired communication unit,

wherein the first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus, and the second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus, and

wherein the first video encoding system uses a video encoding different from MPEG encoding, and the second video encoding system uses MPEG encoding.

11. A method according to claim 10, wherein the first apparatus is a video camera, and the second apparatus is an apparatus adapted to record the second encoded video data on a recording medium.

12. A method according to claim 10, wherein the first apparatus is a video camera, and the second apparatus is an apparatus adapted to display the second encoded video data.

13. A method according to claim 10, wherein the second encoded video data is transmitted using an isochronous transfer.

14. A communication system comprising:

a first apparatus in a wireless network;

a second apparatus in a wired network; and

a communication apparatus that includes a wireless communication unit, a decoding unit, an encoding unit, and a wired communication unit,

wherein the wired communication unit receives second encoded video data encoded by a second video encoding system from the second apparatus through the wired network,

wherein the decoding unit decodes the second encoded video data received by the wired communication unit to provide decoded video data,

wherein the encoding unit encodes the decoded video data into first encoded video data using a first video encoding system,

wherein the wireless communication unit transmits the first encoded video data to the first apparatus through the wireless network,

wherein the first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus, and the second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus, and

wherein the first video encoding system uses a video encoding different from MPEG encoding, and the second video encoding system uses MPEG encoding.

15. A communication system according to claim 14, wherein the first apparatus is an apparatus adapted to record the first encoded video data on a recording medium, and the second apparatus is an apparatus adapted to reproduce the second encoded video data from a recording medium.

16. A communication system according to claim 14, wherein the first apparatus is an apparatus adapted to display the first encoded video data, and the second apparatus is an apparatus adapted to reproduce the second encoded video data from a recording medium.

17. A communication system according to claim 14, wherein the wired communication unit is adapted to receive the second encoded video data using an isochronous transfer.

18. A communication apparatus comprising:

a wired communication unit which receives second encoded video data encoded by a second video encoding system from the second apparatus through a wired network;

a decoding unit which decodes the second encoded video data received by the wired communication unit to provide decoded video data;

an encoding unit which encodes the decoded video data into first encoded video data using a first video encoding system; and

a wireless communication unit which transmits the first encoded video data to the first apparatus through a wireless network,

wherein the first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus, and the second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus, and

wherein the first video encoding system uses a video encoding different from MPEG encoding, and the second video encoding system uses MPEG encoding.

19. A communication apparatus according to claim 18, wherein the first apparatus is an apparatus adapted to record the first encoded video data on a recording medium, and the second apparatus is an apparatus adapted to reproduce the second encoded video data from a recording medium.

20. A communication apparatus according to claim 18, wherein the first apparatus is an apparatus adapted to display the first encoded video data, and the second apparatus is an apparatus adapted to reproduce the second encoded video data from a recording medium.

21. A communication apparatus according to claim 18, wherein the wired communication unit is adapted to receive the second encoded video data using an isochronous transfer.

22. A method for a communication apparatus, the communication apparatus including (a) a wireless communication unit which communicates with a first apparatus through a wireless network and (b) a wired communication unit which communicates with a second apparatus through a wired network, the method comprising the steps of:

receiving second encoded video data encoded by a second video encoding system from the second apparatus using the wired communication unit;

decoding the second encoded video data received in the receiving step to provide decoded video data;

encoding the decoded video data into first encoded video data using a first video encoding system; and

transmitting the first encoded video data to the first apparatus using the wireless communication unit,

wherein the first video encoding system is suitable for a first communication protocol used between the first apparatus and the communication apparatus, and the second video encoding system is suitable for a second communication protocol used between the second apparatus and the communication apparatus, and

wherein the first video encoding system uses a video encoding different from MPEG encoding, and the second video encoding system uses MPEG encoding.

23. A method according to claim 22, wherein the first apparatus is an apparatus adapted to record the first encoded video data on a recording medium, and the second apparatus is an apparatus adapted to reproduce the second encoded video data from a recording medium.

24. A method according to claim 22, wherein the first apparatus is an apparatus adapted to display the first encoded video data, and the second apparatus is an apparatus adapted to reproduce the second encoded video data from a recording medium.

25. A method according to claim 22, wherein the second encoded video data is received using an isochronous transfer.