System and methods for feedback-based data transmission

Abstract

A computer-implemented method includes receiving a feedback message from a receiver of image data. The feedback message includes a reference frame identifier associated with a reference frame correctly received or decoded by the receiver. The method further includes determining a difference between the reference frame identifier and a current frame identifier. The current frame identifier is associated with a current frame to be encoded and the difference indicates a number of frames between the reference frame and the current frame. The method also includes encoding the current frame based at least in part on the difference.

What is claimed is: 
     
         1 . A computer-implemented method, comprising:
 receiving, from a receiver of image data, a feedback message comprising a reference frame identifier, the reference frame identifier being associated with a reference frame correctly received or decoded by the receiver;   determining a difference between the reference frame identifier and a current frame identifier, the current frame identifier being associated with a current frame to be encoded and the difference indicating a number of frames between the reference frame and the current frame; and   encoding the current frame based at least in part on the difference.   
     
     
         2 . The method of  claim 1 , wherein the encoding of the current frame comprises:
 encoding the current frame based at least in part on a comparison between the difference and a predetermined threshold, wherein the predetermined threshold is equal to or greater than a number of frames between adjacent feedback messages indicating an interval between the adjacent feedback messages.   
     
     
         3 . The method of  claim 2 , wherein the difference or the predetermined threshold is a non-negative integer. 
     
     
         4 . The method of  claim 2 , wherein the encoding of the current frame further comprises:
 selecting a coding mode from a plurality of coding modes based at least in part on the comparison, the plurality of coding modes comprising an intraframe coding mode, a short-term interframe coding mode, and a long-term interframe coding mode.   
     
     
         5 . The method of  claim 2 , wherein the encoding of the current frame comprises:
 selecting a short-term interframe coding mode to encode the current frame in response to the difference being less than the predetermined threshold; or   selecting a long-term interframe coding mode or an intraframe coding mode to encode the current frame in response to the difference being greater than or equal to the predetermined threshold.   
     
     
         6 . The method of  claim 1 , further comprising:
 transmitting the encoded current frame to the receiver.   
     
     
         7 . The method of  claim 6 , further comprising:
 packaging the encoded current frame with metadata prior to transmitting the encoded current frame to the receiver.   
     
     
         8 . The method of  claim 7 , 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, a timestamp, a frame rate, a data rate, a resolution, verification data, or an error-detection code. 
     
     
         9 . The method of  claim 1 , wherein the feedback message further comprises a status indicator indicating a receiving status, a transmission status, or a decoding status with respect to the image data, or indicating a malfunction of a hardware or software component of the receiver. 
     
     
         10 . The method of  claim 9 , wherein the encoding of the current frame comprises:
 selecting a coding mode from a plurality of coding modes based at least in part on the status indicator.   
     
     
         11 . The method of  claim 1 , wherein the encoding of the current frame comprises interframe encoding the current frame using the reference frame. 
     
     
         12 . The method of  claim 1 , wherein the feedback message further comprises a timestamp associated with generation or transmission of the feedback message, an interval at which adjacent feedback messages are being sent, or synchronization information for data transmission. 
     
     
         13 . 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 a reference frame identifier, the reference frame identifier being associated with a reference frame correctly received or decoded by the receiver;   determining a difference between the reference frame identifier and a current frame identifier, the current frame identifier being associated with a current frame to be encoded and the difference indicating a number of frames between the reference frame and the current frame; and   encoding the current frame based at least in part on the difference.   
     
     
         14 . The computer system of  claim 13 , wherein the encoding of the current frame comprises:
 encoding the current frame based at least in part on a comparison between the difference and a predetermined threshold, wherein the predetermined threshold is equal to or greater than a number of frames between adjacent feedback messages indicating an interval between the adjacent feedback messages.   
     
     
         15 . The computer system of  claim 14 , wherein the encoding of the current frame further comprises:
 selecting a coding mode from a plurality of coding modes based at least in part on the comparison, the plurality of coding modes comprising an intraframe coding mode, a short-term interframe coding mode, and a long-term interframe coding mode.   
     
     
         16 . The computer system of  claim 14 , wherein the encoding of the current frame further comprises:
 selecting a short-term interframe coding mode to encode the current frame in response to the difference being less than the predetermined threshold; or   selecting a long-term interframe coding mode or an intraframe coding mode to encode the current frame in response to the difference being greater than or equal to the predetermined threshold.   
     
     
         17 . The computer system of  claim 13 , wherein the method further comprises:
 packaging the encoded current frame with metadata, 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, a timestamp, a frame rate, a data rate, a resolution, verification data, or an error-detection code; and   transmitting the packaged encoded current frame to the receiver.   
     
     
         18 . The computer system of  claim 13 , wherein the feedback message further comprises a status indicator indicating a receiving status, a transmission status, or a decoding status with respect to the image data, or indicating a malfunction of a hardware or software component of the receiver. 
     
     
         19 . The computer system of  claim 18 , wherein the encoding of the current frame comprises:
 selecting a coding mode from a plurality of coding modes based at least in part on the status indicator.   
     
     
         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 a reference frame identifier, the reference frame identifier being associated with a reference frame correctly received or decoded by the receiver;   determining a difference between the reference frame identifier and a current frame identifier, the current frame identifier being associated with a current frame to be encoded and the difference indicating a number of frames between the reference frame and the current frame; and   encoding the current frame based at least in part on the difference.