Heuristic Detection of Potential Digital Media Artifacts and Defects in Digital Media Assets

Abstract

A method, comprises monitoring a encoding process of a source video file performed by an encoder; obtaining an encoding decision parameter used to encode a picture of the source video file during the encoding process; comparing the encoding decision parameter to a threshold; based on the step of comparing, identifying the picture as a candidate picture for a visual defect or coding error; and storing a timestamp of the candidate picture.

1 - 20 : (canceled) 
     
     
         21 : A method of encoding a video content including a plurality of video frames having a first frame and a second frame preceding the first frame, the method comprising:
 performing a first pass of an encoding process of the plurality of video frames that generates encoding information about the first frame based in part on the second frame;   storing, in a first file, the encoding information about the first frame generated by the first pass of the encoding process;   after performing the first pass of the encoding process:
 retrieving the encoding information from the first file; 
 detecting, based on the retrieved encoding information, the first frame as a candidate for encoding a defect; 
 performing, in response to detecting, a second pass of the encoding process of the first frame to generate an encoded first frame; and 
 storing the encoded firm frame in an output file. 
   
     
     
         22 : The method of  claim 21 , wherein the encoding information includes a first amount of change between the first frame and the second frame, and wherein detecting includes comparing the first amount of change with a threshold to determine whether the first frame is likely to contain the defect. 
     
     
         23 : The method of  claim 22 , wherein the first amount of change is an amount change in a color spectrum shift. 
     
     
         24 : The method of  claim 22 , wherein the threshold has a static value. 
     
     
         25 : The method of  claim 22 , wherein the threshold has a dynamic value. 
     
     
         26 : The method of  claim 21 , wherein the encoding information includes a provisional identification of a frame type. 
     
     
         27 : The method of  claim 21 , wherein the encoding information includes a provisional allocation of bits to motion vectors. 
     
     
         28 : The method of  claim 21 , wherein the encoding information includes a residual. 
     
     
         29 : The method of  claim 21 , wherein the encoding information includes a provisional quantization parameter value. 
     
     
         30 : The method of  claim 21 , further comprising:
 generating second encoding information during the second pass of the encoding process; and   storing second encoding information in the output file.   
     
     
         31 : A system for encoding a video content including a plurality of video frames having a first frame and a second frame preceding the first frame, the system comprising:
 a processor; and   a memory;   wherein the processor is configured to:
 perform a first pass of an encoding process of the plurality of video frames that generates encoding information about the first frame based in part on the second frame; 
 store, in a first file, the encoding information about the first frame generated by the first pass of the encoding process; 
 after performing the first pass of the encoding process:
 retrieve the encoding information from the first file; 
 detect, based on the retrieved encoding information, the first frame as a candidate for encoding a defect; 
 perform, in response to detecting, a second pass of the encoding process of the first frame to generate an encoded first frame; and 
 store the encoded firm frame in an output file. 
 
   
     
     
         32 : The system of  claim 31 , wherein the encoding information includes a first amount of change between the first frame and the second frame, and wherein detecting includes comparing the first amount of change with a threshold to determine whether the first frame is likely to contain the defect. 
     
     
         33 : The system of  claim 32 , wherein the first amount of change is an amount change in a color spectrum shift. 
     
     
         34 : The system of  claim 32 , wherein the threshold has a static value. 
     
     
         35 : The system of  claim 32 , wherein the threshold has a dynamic value. 
     
     
         36 : The system of  claim 31 , wherein the encoding information includes a provisional identification of a frame type. 
     
     
         37 : The system of  claim 31 , wherein the encoding information includes a provisional allocation of bits to motion vectors. 
     
     
         38 : The system of  claim 31 , wherein the encoding information includes a residual. 
     
     
         39 : The system of  claim 31 , wherein the encoding information includes a provisional quantization parameter value. 
     
     
         40 : The system of  claim 31 , wherein the processor is further configured to:
 generate second encoding information during the second pass of the encoding process; and   store second encoding information in the output file.