Home

Results 81 - 90 of 78,945 for picture. Search took 2.346 seconds.  
Sort by date/Sort by relevance
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: 723668.36 - https://www.itu.int/wftp3/av-a...video-site/9607_She/draft1.doc
Data Source: un
Introduction The purpose of this contribution is to propose a quick error recovery mechanism by introducing a new picture type “Reference Picture (R-picture/R-frame)”. (...) Proposed method The basic idea here is to provide a new picture type, called “Reference Picture (R-picture/R-frame)” for error recovery purpose. (...) Decoder that does not support R-pictures does not need to decode them but just to recognize R-picture’s picture type and skip them.
Language:English
Score: 723663.67 - https://www.itu.int/wftp3/av-a...o-site/0201_Gen/JVT-B076d1.doc
Data Source: un
Introduction The purpose of this contribution is to propose a quick error recovery mechanism by introducing a new picture type “Reference Picture (R-picture/R-frame)”. (...) Proposed method The basic idea here is to provide a new picture type, called “Reference Picture (R-picture/R-frame)” for error recovery purpose. (...) Decoder that does not support R-pictures does not need to decode them but just to recognize R-picture’s picture type and skip them.
Language:English
Score: 723663.67 - https://www.itu.int/wftp3/av-a.../2002_01_Geneva/JVT-B076d1.doc
Data Source: un
S [2], key picture uses the conventional closed loop motion compensation and the reference pictures for the key picture shall be base representation without FGS enhancement. On the contrary, the reference pictures of non-key picture shall be base representation + FGS enhancement. (...) The decoding process regarding key picture is defined as follows. - the reference picture of key picture shall be the pictures marked as “base representation”. ( in sub clause S.8.2.4.2.6 Initialization process for the reference picture list for EP slices in frames and subclause S.8.2.4.2.8 Initialization process for the reference picture list for EB slices in frames ) - after decoding the picture, the decoded picture of key picture is duplicated and the duplicated version is marked as “base representation” and is not updated by following progressive refinement slices. ( in S.8.2.5 Decoded reference picture marking process ) Fig. 1 shows the typical example of the reference pictures for the key picture and non-key picture.
Language:English
Score: 723651.9 - https://www.itu.int/wftp3/av-a...te/2005_07_Poznan/JVT-P079.doc
Data Source: un
Inter-operability with Annex O (Temporal, SNR, and Spatial Scalability mode) Annex U affects the following piture types of Annex O: · B-pictures · EP-pictures tbd. Inter-operability with Annex P (Reference Picture Resampling mode) The Reference Picture Resampling is operated by applying the warping only to the picture in the multi-frame buffer with index 0. (...) The warped picture replaces the decoded picture at the corresponding position in the multi-frame buffer. (...) This shall also be conducted if the Reference Picture Resampling mode is invoked implicitly by the occurrence of a picture header for an INTER coded picture having a picture size which differs from that of the previous encoded picture.
Language:English
Score: 723637.16 - https://www.itu.int/wftp3/av-a...video-site/0005_Osa/q15j50.doc
Data Source: un
Added explanation what to do with picture numbers: "Picture Numbers enable decoders to detect losses of reference pictures." (...) Softened some derogatory remarks about interlaced video. 13. Allowed spare pictures to be specified for B pictures for use as a forward reference picture. (...) For B pictures, Picture Number shall have the same value as that of the most temporally-recent non-B picture in the reference layer of the B picture which precedes the B picture in bitstream order (a picture which is temporally subsequent to the B picture).
Language:English
Score: 723182.47 - https://www.itu.int/wftp3/av-a...tMeeting/AnnW_PostOsaka_r1.doc
Data Source: un
Added explanation what to do with picture numbers: "Picture Numbers enable decoders to detect losses of reference pictures." (...) Softened some derogatory remarks about interlaced video. 13. Allowed spare pictures to be specified for B pictures for use as a forward reference picture. (...) For B pictures, Picture Number shall have the same value as that of the most temporally-recent non-B picture in the reference layer of the B picture which precedes the B picture in bitstream order (a picture which is temporally subsequent to the B picture).
Language:English
Score: 723182.47 - https://www.itu.int/wftp3/av-a...tMeeting/AnnW_PostOsaka_r2.doc
Data Source: un
For example, a decoder capable of decoding 4CIF pictures at 15 pictures per second [actually 15*(1000/1001) pictures per second] should also be able to decode CIF, QCIF and SQCIF pictures at least at 15 pictures per second. (...) For example, an encoder supporting a custom picture format of 256 × 256 should support QCIF and SQCIF picture encoding. 2) An encoder or decoder which supports a custom picture clock frequency for a standard picture format should support a higher or equal frame rate (in pictures per second) at the standard picture clock frequency of 30 Hz [actually 30*(1000/1001) Hz] for the same picture format. For example, if a decoder supports QCIF pictures at 12.5 pictures per second with a 25 Hz picture clock, it should at least be able to decode QCIF pictures at 15 pictures per second at 30 Hz.
Language:English
Score: 722986.2 - https://www.itu.int/wftp3/av-a...video-site/0005_Osa/q15j12.doc
Data Source: un
Picture layer information will be transported in-band, which implies heavy protection such as redundant copies for every slice of a picture (or similar) when transported over unreliable channels. · Group-of-Picture Layer contains information relevant to a group of pictures (GOP). A GOP is defined as a set of pictures that are coded without any dependencies to other pictures. (...) Picture Type variable (small) Picture Type, e.g. I, P, B, … Picture Is it appropriate to have picture types at all, or should this info better go into the slice layer?
Language:English
Score: 722475.34 - https://www.itu.int/wftp3/av-a...deo-site/0104_Aus/VCEG-M74.doc
Data Source: un
The enhanced reference picture selection mode contains a feature called Reference Picture Pruning. (...) PM M -1. If the number of pictures maximally accommodated by the multiple reference picture buffer corresponds to M , the motion estimation when coding picture m , if 0 M , the maximum number of pictures M can be used. (...) If a custom picture clock frequency was not in use for the reference picture, the two MSBs of TRP are zero and the LSBs contain the eight bit TR found in the picture header of the reference picture.
Language:English
Score: 722439.36 - https://www.itu.int/wftp3/av-a...263ppDeterminationModified.doc
Data Source: un