公开(公告)号：US20160241878A1

公开(公告)日：2016-08-18

申请号：US14622771

申请日：2015-02-13

Applicant: NETFLIX, Inc

Inventor： Anne AARON ,  Zhonghua MA

IPC: H04N19/65 ,  H04N19/176

Abstract: In one embodiment of the present invention, an encode validator identifies and classifies errors introduced during the parallel chunk-based translation of a source to a corresponding aggregate encode. In operation, upon receiving a source for encoding, a frame difference generator creates a frame difference file for the source. A parallel encoder then distributes per-chunk encoding operations across machines and creates an aggregate encode. The encode validator decodes the aggregate encode and creates a corresponding frame difference file. Subsequently, the encode validator performs phase correlation operations between the two frame difference files to detect errors generated by encoding process faults (i.e., dropping a frame, etc.) while suppressing discrepancies inherent in encoding, such as those attributable to low bit-rate encoding. Advantageously, since the encode validator leverages frame difference files, this indirect verification technique enables efficient debugging of parallel encoding processes in which the complete source is unavailable for post-encode analysis.

Abstract translation: 在本发明的一个实施例中，编码验证器识别并分类在源的基于并行块的转换期间引入的错误到对应的聚合编码。 在操作中，在接收到编码源时，帧差产生器为源创建帧差文件。 并行编码器然后在机器之间分配每个块编码操作，并创建一个聚合编码。 编码验证器解码聚合编码并创建相应的帧差异文件。 随后，编码验证器在两个帧差分文件之间执行相位相关操作，以检测编码处理故障（即，丢帧等）产生的错误，同时抑制编码固有的差异，例如归因于低比特率编码 。 有利的是，由于编码验证器利用帧差分文件，所以这种间接验证技术能够实现并行编码处理的有效调试，其中完整的源不能用于后编码分析。