MOBILE TERMINAL AND METHOD FOR TRANSMITTING VIDEO DATA IN VIDEO TELEPHONY SYSTEM

• US 20090303309A1
• Filed: 06/03/2009
• Published: 12/10/2009
• Est. Priority Date: 06/04/2008
• Status: Abandoned Application

• Current Assignee: Pantech Corporation (Ideahub, Inc.)
• Original Assignee: Pantech Corporation (Ideahub, Inc.)
• Inventors: Kwon, Ohyoon
• Application Number:
  US12/477,556
• Publication Number:
  US 20090303309A1
• Time in Patent Office: Days
• US Class Current: 348/14.20
• CPC Class Codes: H04N 7/147 Communication arrangements, e.g. identifying the communication as a video-communication, intermediate storage of the signals selecting H04Q

Abstract

A method for transmitting video data in a video telephony system includes generating an intra frame at a first interval, transmitting the intra frame to a receiving terminal, and generating the intra frame at a second interval if data transmission with the receiving terminal is possible. The first interval may be shorter than the second interval.

Claims

1. A method for transmitting video data in a video telephony system, comprising:

generating an intra frame at a first interval;

transmitting the intra frame from a calling terminal to a receiving terminal; and

generating the intra frame at a second interval to transmit the generated intra frame to the receiving terminal.

2. The method of claim 1, wherein generating the intra frame at the second interval comprises:

changing a generation interval of the intra frame from the first interval to the second interval, the second interval being different from the first interval; and

generating the intra frame at the second interval.

3. The method of claim 1, wherein the first interval is shorter than the second interval.

4. The method of claim 1, wherein in the first interval, the calling terminal transmits the intra frame to the receiving terminal every two frames.

5. The method of claim 1, wherein in the second interval, the calling terminal transmits the intra frame to the receiving terminal every twenty frames.

6. The method of claim 1, wherein generating the intra frame at the first interval comprises:

generating the intra frame at the first interval after data transmission between the calling terminal and a gateway becomes possible, wherein the gateway relays a communication between the calling terminal and the receiving terminal.

7. The method of claim 1, further comprising:

determining that data transmission with the calling terminal is possible; and

generating the intra frame at the second interval after determining that data transmission with the receiving terminal is possible.

8. The method of claim 7, wherein the calling terminal determines that data transmission with the receiving terminal is possible if video data is received from the receiving terminal.

9. The method of claim 1, wherein:

the calling terminal and the receiving terminal use different protocols.

10. The method of claim 9, wherein:

the calling terminal uses a packet switching based protocol, and the receiving terminal uses a circuit switching based protocol.

11. A computer comprising a computer-readable recording medium and a processor, the computer to execute a program stored on the computer-readable recording medium to implement the method of claim 1.

12. A mobile terminal, comprising:

a video codec to generate an intra frame and an inter frame for performing video telephony;

an image sensor to capture image data;

a display; and

a radio frequency (RF) transceiver to transmit and receive data,

wherein the video codec generates the intra frame at a first interval after determining that video data transmission with a gateway is possible, and generates the intra frame at a second interval after determining that video data transmission with a receiving terminal is possible.

13. The mobile terminal of claim 12, wherein video data transmission with a receiving terminal is determined to be possible if the RF transceiver receives video data from the receiving terminal.

14. The mobile terminal of claim 12, wherein the first interval is shorter than the second interval.

15. The mobile terminal of claim 12, wherein in the first interval, the mobile terminal transmits the intra frame to the receiving terminal every two frames.

16. The mobile terminal of claim 12, wherein in the second interval, the mobile terminal transmits the intra frame to the receiving terminal every twenty frames.