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

• US 8,159,970 B2
• Filed: 03/17/2006
• Issued: 04/17/2012
• 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
• Primary Examiner(s): Ngo, Ricky
• Assistant Examiner(s): LIU, BEN H
• Application Number:
  US11/377,680
• Publication Number:
  US 20070041337A1
• Time in Patent Office: 2,223 Days
• Field of Search: 370/260, 370/352, 370/263, 370/435
• US Class Current: 370/254
• 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 codec information of the second communications device when receiving an image communication request, extracting the codec information of the second communications device that is not contained in the first communications device and storing the extracted codec information of the second communications device;

encoding selected image data using the codec information of the second communications device; and

communicating the encoded selected image data to the second communications device;

wherein the selected image data is encoded with a first codec prior to the encoding operation;

wherein the step of encoding selected image data using the codec information of the second communications device comprises the steps of;

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

if the first codec of the selected image data is not supported by the second communications device, selecting a second codec for encoding the selected image data from the codec information of the second communications device for optimizing, with respect to the selected image data, an encoding speed, a decoding speed, and/or a size of encoded data, and encoding the selected image data using the second codec.

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 encoded data is selected as the second codec for encoding the selected image data from the codec information of the second communications device.

3. A method as defined in claim 2, wherein the optimum codec comprises at least a 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 second codec information used for encoding the selected image data maximizes an encoding speed, maximizes a decoding speed, and/or minimizes a size of the encoded data.

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

6. 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.

7. 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 codec information of the second communications device when receiving an image communication request;

extracting the codec information of the second communications device that is not contained in the first communications device and storing the extracted codec information of the second communications device if the codec information of the first communications device does not match with the codec information of the second communications device; and

encoding selected image data using the codec information of the second communications device;

transmitting the encoded selected image data to the second communications device;

wherein the selected image data is encoded with a first codec prior to the encoding operation;

wherein the step of encoding selected image data using the codec information of the second communications device comprises the steps of;

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

if the first codec of the selected image data is not supported by the second communications device, selecting a second codec for encoding the selected image data from the codec information of the second communications device for optimizing, with respect to the selected image data, an encoding speed, a decoding speed, and/or a size of encoded data, and encoding the selected image data using the second codec.

8. A method as defined in claim 7, wherein an optimum codec for maximizing an encoding speed, maximizing a decoding speed, and/or minimizing a size of encoded data is selected as the second codec for encoding the selected image data from the codec information of the second communications device.

9. A method as defined in claim 8, wherein the optimum codec comprises at least a 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.

10. A method as defined in claim 7, wherein the second codec information used for encoding the selected image data maximizes an encoding speed, maximizes a decoding speed, and/or minimizes a size of the encoded data.

11. A method as defined in claim 7, wherein the first communications device and/or second communications device comprises a wireless communications device.

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

13. 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 codec information stored in a image codec list of the first communications device with the codec information in an image codec list of the second communications device;

extracting the codec information in the image codec list of the second communications device that is not contained in of the image codec list of the first communications device and storing the extracted codec information of the second communications device and storing the codec information in the image codec list of the second communications device if the codec information in the image codec list of the first communications device does not match with the codec information in the image codec list of the second communications device; and

encoding selected image data using the codec information in the codec list of the second communications device;

transmitting the encoded selected image data to the second communications device;

wherein the selected image data is encoded with a first codec prior to the encoding operation;

wherein the step of encoding selected image data using the codec information in the image codec list of the second communications device comprises the steps of;

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

if the first codec of the selected image data is not supported by the second communications device, selecting a second codec for encoding the selected image data from the codec information in the image codec list of the second communications device for optimizing, with respect to the selected image data, an encoding speed, a decoding speed, and/or a size of encoded data, and encoding the selected image data using the second codec.

14. A method as defined in claim 13, wherein an optimum codec for maximizing an encoding speed, maximizing a decoding speed, and/or minimizing a size of the encoded data is selected as the second codec for encoding the selected image data from the codec information in the codec list of the second communications device.

15. A method as defined in claim 14, wherein the optimum codec comprises at least a 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.

16. A method as defined in claim 13, wherein the second codec information used for encoding the selected image data maximizes an encoding speed, maximizes a decoding speed, and/or minimizes a size of the encoded data.

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

18. A method as defined in claim 13, wherein the image data, image communications mode and image communication are video data, video communications mode and video communication, respectively.