Method of transmitting image data in video telephone mode of a wireless terminal

• US 20070041337A1
• Filed: 03/17/2006
• Published: 02/22/2007
• Est. Priority Date: 08/11/2005
• Status: Active Grant

• Current Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: Kim, Hwan, Kim, Jeong-Hoon, Lim, Chae-Whan
• Granted Patent: US 8,159,970 B2
• Time in Patent Office: Days
• US Class Current: 370/260
• CPC Class Codes: H04N 7/148 Interfacing a video terminal to a particular transmission medium, e.g. ISDN

Abstract

Disclosed is a method of communicating image data to a second communications device from a first communications device while the first communications device is in an image communications mode of operation. The method includes the steps of checking the codecs of the second communications device when receiving an image communication; storing the codecs of the second communications device if the codecs of the first communications device do not match with the codecs of the second communications device; and encoding selected image data using one of the codecs of the second communications device when the encoded selected image data is to be transmitted to the second communications device.

Claims

1. A method of communicating image data to a second communications device from a first communications device while the first communications device is in an image communications mode of operation, comprising the steps of:

checking one or more codecs of the second communications device when receiving an image communication and storing one or more of the codecs of the second communications device; and

encoding selected image data using one of the codecs of the second communications device when the encoded selected image data is to be communicated to the second communications device.

2. A method as defined in claim 1, wherein an optimum codec for maximizing an encoding speed, maximizing a decoding speed, and/or minimizing a size of the encoded data is extracted from the codecs of the second communications device to be stored.

3. A method as defined in claim 2, wherein the optimum codec is at least the first codec of a prioritized list of codecs of the second communications device, wherein the codecs are arranged in order with the first codec being the optimum codec.

4. A method as defined in claim 1, wherein the step of encoding selected image data using one of the codecs of the second communications device comprises the steps of:

determining whether a codec of the selected image data is supported by the second communications device; and

encoding the selected image data using one of the codecs of the second communications device if the codec of the selected image data is not supported by the second communications device.

5. A method as defined in claim 4, wherein the codec used for encoding the selected image data maximizes an encoding speed, maximizes a decoding speed, and/or minimizes a size of the encoded data.

6. A method as defined in claim 1, wherein the first communications device and/or second communications device is a wireless communications device.

7. A method as defined in claim 1, wherein the image data, image communications mode and image communication are video data, video communications mode and video communication, respectively.

8. A method of communicating image data to a second communications device from a first communications device while the first communications device is in an image communications mode of operation, comprising the steps of:

checking the codecs of the second communications device when receiving an image communication;

storing the codecs of the second communications device if the codecs of the first communications device do not match with the codecs of the second communications device; and

encoding selected image data using one of the codecs of the second communications device when the encoded selected image data is to be transmitted to the second communications device.

9. A method as defined in claim 8, wherein an optimum codec for maximizing an encoding speed, maximizing a decoding speed, and/or minimizing a size of the encoded data is extracted from the codecs of the second communications device to be stored.

10. A method as defined in claim 9, wherein the optimum codec is at least the first codec of a prioritized list of codecs of the second communications device, wherein the codecs are arranged in order with the first codec being the optimum codec.

11. A method as defined in claim 8, wherein the step of encoding selected image data using one of the codecs of the second communications device comprises the steps of:

determining whether a codec of the selected image data is supported by the second communications device; and

encoding the selected image data using one of the codecs of the second communications device if the codec of the selected image data is not supported by the second communications device.

12. A method as defined in claim 11, wherein the codec used for encoding the selected image data maximizes an encoding speed, maximizes a decoding speed, and/or minimizes a size of the encoded data.

13. A method as defined in claim 8, wherein the first communications device and/or second communications device is a wireless communications device.

14. A method as defined in claim 8, wherein the image data, image communications mode and image communication are video data, video communications mode and video communication, respectively.

15. A method of communicating image data to a second communications device from a first communications device while the first communications device is in an image communications mode of operation, comprising the steps of:

exchanging codec information with second communications device when receiving an image communication;

comparing the codecs stored in a image codec list of the first communications device with those in a image codec list of the second communications device;

storing one or more of the codecs of the image codec list of the second communications device if the codecs of the image codec list of the first communications device do not match with the codecs of second communications device; and

encoding selected image data using one of the codecs of the second communications device when the encoded selected image data is to be transmitted to the second communications device.

16. A method as defined in claim 15, wherein an optimum codec for maximizing an encoding speed, maximizing a decoding speed, and/or minimizing a size of the encoded data is extracted from the codecs of the second communications device to be stored.

17. A method as defined in claim 16, wherein the optimum codec is at least the first codec of a prioritized list of codecs of the second communications device, wherein the codecs are arranged in order with the first codec being the optimum codec.

18. A method as defined in claim 15, wherein the step of encoding selected image data using one of the codecs of the second communications device comprises the steps of:

determining whether a codec of the selected image data is supported by the second communications device; and

encoding the selected image data using one of the codecs of the second communications device if the codec of the selected image data is not supported by the second communications device.

19. A method as defined in claim 18, wherein the codec used for encoding the selected image data maximizes an encoding speed, maximizes a decoding speed, and/or minimizes a size of the encoded data.

20. A method as defined in claim 15, wherein the first communications device and/or second communications device is a wireless communications device.

21. A method as defined in claim 15, wherein the image data, image communications mode and image communication are video data, video communications mode and video communication, respectively.