SYSTEM AND METHODS FOR FEEDBACK-BASED DATA TRANSMISSION

• US 20190327463A1
• Filed: 06/28/2019
• Published: 10/24/2019
• Est. Priority Date: 12/30/2016
• Status: Active Grant

• Current Assignee: SZ DJI Technology Co., Ltd. (d/b/a DJI) (iFlight Technology Company Limited)
• Original Assignee: SZ DJI Technology Co., Ltd. (d/b/a DJI) (iFlight Technology Company Limited)
• Inventors: ZHAO, Liang, SU, Wenyi, YU, Qingdong, XIAO, Wei, ZHU, Lei, GONG, Ming, MA, Ning, FAN, Wei, CUI, Hao
• Granted Patent: US 10,911,750 B2
• Time in Patent Office: Days
• CPC Class Codes: H04N 19/103 Selection of coding mode or of prediction mode
• CPC Class Codes: H04N 19/107 between spatial and temporal predictive coding, e.g. picture refresh
• CPC Class Codes: H04N 19/164 Feedback from the receiver or from the transmission channel
• CPC Class Codes: H04N 19/172 the region being a picture, frame or field
• CPC Class Codes: H04N 19/89 involving methods or arrangements for detection of transmission errors at the decoder

Abstract

A computer-implemented method includes receiving a feedback message including feedback information from a receiver of image data, obtaining a current frame to be encoded, encoding the current frame based at least in part on the feedback information, and transmitting the encoded current frame to the receiver.

Claims

1. A computer-implemented method, comprising:

receiving, from a receiver of image data, a feedback message comprising feedback information;

obtaining a current frame to be encoded;

encoding the current frame based at least in part on the feedback information; and

transmitting the encoded current frame to the receiver.

2. The method of claim 1, wherein the feedback information comprises a status indicator that indicates a receiving status with respect to the image data.

3. The method of claim 2, wherein encoding the current frame comprises selecting a coding mode from a plurality of coding modes comprising an intraframe coding mode, a short-term coding mode, and a long-term coding mode based at least in part on the status indicator.

4. The method of claim 1, wherein the feedback information comprises a reference frame identifier associated with a reference frame that has been correctly received by the receiver.

5. The method of claim 4, wherein encoding the current frame comprises interframe encoding the current frame using the reference frame.

6. The method of claim 4, wherein encoding the current frame comprises:

determining a difference between a current frame identifier associated with the current frame and the reference frame identifier; and

encoding the current frame based at least in part on a comparison between the difference and a predetermined threshold.

7. The method of claim 6, wherein the current frame is interframe encoded using a short-term reference frame in response to the difference being less than the predetermined threshold and wherein the current frame is interframe encoded using the reference frame in response to the difference being equal to or greater than the predetermined threshold.

8. The method of claim 6, wherein the predetermined threshold is greater than an interval between adjacent feedback messages.

9. The method of claim 1, further comprising, prior to transmitting the encoded current frame to the receiver, packaging the encoded current frame with metadata.

10. The method of claim 9, wherein the metadata comprises at least one of an identifier of the current frame, a type of the encoded current frame, a reference frame offset, or an error-detection code.

19. The computer system of claim 1, wherein the method further comprises packaging metadata with the encoded current frame prior to transmitting the packaged data to the receiver.

11. A computer system, comprising:

a memory that stores one or more computer-executable instructions; and

one or more processors configured to access the memory and execute the computer-executable instructions to perform a method comprising;

receiving, from a receiver of image data, a feedback message comprising feedback information;

obtaining a current frame to be encoded;

encoding the current frame based at least in part on the feedback information; and

transmitting the encoded current frame to the receiver.

12. The computer system of claim 11, wherein the feedback information comprises a status indicator that indicates a receiving status with respect to the image data.

13. The computer system of claim 12, wherein encoding the current frame comprises selecting a coding mode from a plurality of coding modes comprising an intraframe coding mode, a short-term coding mode, and a long-term coding mode based at least in part on the status indicator.

14. The computer system of claim 11, wherein the feedback information comprises a reference frame identifier associated with a reference frame that has been correctly received by the receiver.

15. The computer system of claim 14, wherein encoding the current frame comprises interframe encoding the current frame using the reference frame.

16. The computer system of claim 14, wherein encoding the current frame comprises:

determining a difference between a current frame identifier associated with the current frame and the reference frame identifier; and

encoding the current frame based at least in part on a comparison between the difference and a predetermined threshold.

17. The computer system of claim 16, wherein the current frame is interframe encoded using a short-term reference frame in response to the difference being less than the predetermined threshold and wherein the current frame is interframe encoded using the reference frame in response to the difference being equal to or greater than the predetermined threshold.

18. The computer system of claim 16, wherein the predetermined threshold is greater than an interval between adjacent feedback messages.

20. One or more non-transitory computer-readable storage media storing computer-executable instructions that, when executed by a computing system, configure the computing system to perform a method comprising:

receiving, from a receiver of image data, a feedback message comprising feedback information;

obtaining a current frame to be encoded;

encoding the current frame based at least in part on the feedback information; and

transmitting the encoded current frame to the receiver.