Constrained Inter Prediction: Removing Dependencies Between Different Data Partitions

Engineering wireless broadband access to IPTV

“…Though partition-A is independent of partitions B and C, CIP should be set in the codec configuration [21] to make partition-B independent of partition-C. (Though reference [21] refers to a proposal to add constrained inter prediction to H.264/AVC, it also describes constrained intra-prediction, which is already a part of the codec standard.) By setting this option, partition-B MBs are no longer predicted from neighbouring inter-coded MBs.…”

“…The current authors have introduced various error resilience measures [19]: different rates and types of Intrarefresh Macroblocks (MBs) [20], Constrained Intra Prediction (CIP) [21] and where necessary, redundant datapartitioned Network Abstraction Layer (NAL) units (codec level packets) [22]. The impact of each of these measures is analyzed in isolation from each other, for Constant BitRate (CBR) as well as Variable BitRate (VBR) streaming.…”

Error Resilient for Multiview Video Transmissions with GOP Analysis

“…I-frames are self-referential and do not require any information from other frames for prediction, so it consists of only intra coded MBs. The H.264 compliant encoder does not need to send empty partitions to the decoder because a standard H.264 decoder will assume missing partitions are empty partitions and are designed to handle the multiview bitstream accordingly [14].…”

Innovations in Video Error Resilience and Concealment

“…In order to decode partition-B and -C, the decoder must know the location from which each MB was predicted, which implies that partitions-B and -C cannot be reconstructed if partition-A is lost. Though partition-A is independent of partitions-B and -C, Constrained Intra Prediction (CIP) should be set [59] to make partition-B independent of partition-C. By setting this option, partition-B MBs are no longer predicted from neighboring inter-coded MBs, the prediction residuals of which reside in partition-C. However, there is some loss of compression efficiency if CIP is turned on.…”

“…However, there is some loss of compression efficiency if CIP is turned on. Because of the profile structuring of H.264/AVC [59], partition-C cannot normally be made independent of partition-B.…”