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The two-picture backward prediction sub-mode for B pictures in Enhanced Reference Picture Selection mode (Annex U subclause U.3.1.5.5) is not supported in Profile 8. (...) Decoders should be capable of operation with a smaller picture format at maximum picture rates no lower than the maximum picture rate for which it is capable of operation with a larger standard picture format. (...) For example, a decoder supporting a custom picture format of 720×288 shall support CIF, QCIF and sub-QCIF picture decoding. 2) A decoder for any profile and level defined herein that supports custom picture formats shall support all standard or custom picture formats having both height and width smaller than or equal to those of the maximum supported picture format. 3) A decoder for any profile and level defined herein that supports a minimum picture interval with the standard picture clock frequency of (30 000) / 1001 units per second shall support the same or smaller minimum picture interval for all supported picture formats having both height and width smaller than or equal to those of the maximum picture format at which the minimum picture interval is specified. 4) A decoder for any profile and level defined herein that supports a minimum picture interval and supports custom picture clock frequencies shall support the use of any picture clock frequency with the same or larger picture interval for all supported picture formats having both height and width smaller than or equal to those of the maximum picture format at which the minimum picture interval is specified.
Language:English
Score: 734626.17 - https://www.itu.int/wftp3/av-a...deo-site/0008_Por/q15k51r1.doc
Data Source: un
(In the JVT codec, B pictures can also be stored are referenced in other pictures.) (...) Picture number 7 is assigned to both picture B EL1.1.7 and picture P BL.0.7, as the B picture is not stored in the multi-picture buffer. However, as picture B EL1.1.6 is stored in the multi-picture buffer, the picture number is incremented normally in the picture following it.
Language:English
Score: 734551.86 - https://www.itu.int/wftp3/av-a.../2002_01_Geneva/JVT-B042r1.doc
Data Source: un
(In the JVT codec, B pictures can also be stored are referenced in other pictures.) (...) Picture number 7 is assigned to both picture B EL1.1.7 and picture P BL.0.7, as the B picture is not stored in the multi-picture buffer. However, as picture B EL1.1.6 is stored in the multi-picture buffer, the picture number is incremented normally in the picture following it.
Language:English
Score: 734551.86 - https://www.itu.int/wftp3/av-a...o-site/0201_Gen/JVT-B042r1.doc
Data Source: un
In this annex, a distinction is made between the “decoded picture” and the “displayed picture”. For purposes of this annex, the “displayed picture” is a picture having the same picture format as specified for the current picture by the picture layer of the video bitstream syntax. (...) Instead, a background picture which is either a prior reference picture or is an externally controlled picture is revealed. (...) If the current picture has no temporally-previous reference picture (i.e., if the current picture is a picture of type INTRA or EI), the picture to which the RPB flag bit refers is the picture which would normally have been the reference picture if the current picture were of type INTER or EP as appropriate.
Language:English
Score: 734495.26 - https://www.itu.int/wftp3/av-a...video-site/9910_Red/q15i22.doc
Data Source: un
The process uses the syntax element difference_of_pic_nums_minus1 to signal the picture number of the short-term picture that is to be assigned as a long-term picture. difference_of_pic_nums_minus1 is relative to the picture number of the current picture. (...) The loop is composed by Step 2.1 and Step 2.2. Step 2.1 If picture i is an IDR picture, the candidate picture is the picture we are looking for, break the loop. Step 2.2 If the POC of picture i is less than the POC of the candidate picture , set picture i as the candidate picture .
Language:English
Score: 734495.26 - https://www.itu.int/wftp3/av-a...e/2002_12_Awaji/JVT-F047-L.doc
Data Source: un
According to subclause 8.2.1 of JVT-F100, coded picture boundaries are not detected between a primary coded picture and any redundant coded picture associated with it. (...) Decoded pictures that contain spare units are called spare pictures. target_frame_num identifies the target picture whose spare pictures and units are specified later in the message. (...) These pictures are referred to as the target picture set.
Language:English
Score: 734475.8 - https://www.itu.int/wftp3/av-a...e/2003_03_Pattaya/JVT-G030.doc
Data Source: un
The two-picture backward prediction sub-mode for B pictures in Enhanced Reference Picture Selection mode (Annex U subclause U.3.1.5.5) is not supported in Profile 8. (...) Decoders should be capable of operation with a smaller picture format at maximum picture rates no lower than the maximum picture rate for which it is capable of operation with a larger standard picture format. (...) For example, a decoder supporting a custom picture format of 720×288 shall support CIF, QCIF and sub-QCIF picture decoding. 2) A decoder for any profile and level defined herein that supports custom picture formats shall support all standard or custom picture formats having both height and width smaller than or equal to those of the maximum supported picture format. 3) A decoder for any profile and level defined herein that supports a minimum picture interval with the standard picture clock frequency of (30 000) / 1001 units per second shall support the same or smaller minimum picture interval for all supported picture formats having both height and width smaller than or equal to those of the maximum picture format at which the minimum picture interval is specified. 4) A decoder for any profile and level defined herein that supports a minimum picture interval and supports custom picture clock frequencies shall support the use of any picture clock frequency with the same or larger picture interval for all supported picture formats having both height and width smaller than or equal to those of the maximum picture format at which the minimum picture interval is specified.
Language:English
Score: 734001.9 - https://www.itu.int/wftp3/av-a...deo-site/0008_Por/q15k51r3.doc
Data Source: un
We propose to adopt this method by making the data removal conditional; to remove a complete picture if it is available at a picture period, otherwise the coded data remains in the buffer. (...) Sequence header and group of picture layer data elements which immediately precede a picture are removed at the same time as that picture. (...) This situation is allowed to occur only if neither the picture to be removed nor the previously removed picture is B type.
Language:English
Score: 733784 - https://www.itu.int/wftp3/av-a.../Report_texts/AVC-0553R_a3.rtf
Data Source: un
Currently the standard allows for inclusion of repeated sequence or picture parameter sets anywhere in the sequence including between 2 slices of the same picture. (...) The syntax order of these repeated sequence parameter set NAL Units, if present, shall precede the order of slices and data partitions of the primary coded picture as well as any SEI NAL Units and repeated picture parameter sets.” “ A picture parameter set NAL Unit shall precede in syntax order all NAL Units that refer to that picture parameter set unless the picture parameter set NAL unit contains a duplicate copy of the previous picture parameter set RBSP with the same value of pic_parameter_set_id. (...) We recommend that this restriction be eliminated so that the picture timing SEI can precede ALL pictures. In order to avoid conflict in computation of picture removal time where a picture is preceded by both buffering period SEI and picture timing SEI, we recommend that the removal time computations using either the initial_cpb_removal_delay in buffering period SEI (for decoders that just started the decoding) or cpb_removal_delay in picture timing SEI should result in the same value of picture removal time from the CPB.
Language:English
Score: 733780.3 - https://www.itu.int/wftp3/av-a...e/2003_03_Pattaya/JVT-G039.doc
Data Source: un
PB-frames mode A PB-frame consists of two pictures being coded as one unit. The name PB comes from the name of picture types in Recommendation H.262 where there are P-pictures and B-pictures. Thus a PB-frame consists of one P-picture which is predicted from the previous decoded P-picture and one B-picture which is predicted from both the previous decoded P-picture and the P-picture currently being decoded. The name B-picture was chosen because parts of B-pictures may be bidirectionally predicted from the past and future pictures.
Language:English
Score: 733646.1 - https://www.itu.int/wftp3/av-a...deo-site/9607_She/lbc96263.doc
Data Source: un