Patent ID: 9686563
Date: 2017-06-20
CPC Classifications: H04N

Claim:
1. A method of decoding encoded moving picture data for video decoding apparatus to implement backward interframe prediction from a temporally subsequent frame, the method comprising: computer implemented steps performed by a processor of a computer system to implement: decoding the encoded moving picture data into decoded pictures; storing the decoded pictures in a decoded picture buffer, wherein the decoded pictures in the decoded picture buffer comprise at least one reference picture and at least one output queuing picture whose output time for display is yet to come; if a decoded picture is an IDR picture, performing the following steps independently of a memory management control operation (MMCO): if a decoded picture is an IDR picture, making unused for reference the at least one reference picture stored in the decoded picture buffer; if a decoded picture is an IDR picture and a flag associated with the IDR picture is set equal to “1”, emptying the decoded picture buffer without outputting the output queuing picture stored in the decoded picture buffer; and if a decoded picture is an IDR picture and a flag associated with the IDR picture is set equal to “0” deleting only the reference pictures stored in the decoded picture buffer.