Patent
Dynamically determining group of picture size during encoding of video sequence
Reads0
Chats0
TLDR
In this paper, a method for dynamically determining group of picture (GOP) size as a function of picture change activity within a sequence of video frames is presented. But the method is not suitable for the analysis of video sequences.Abstract:
Method, system and computer program product are provided for dynamically determining group of picture (GOP) size as a function of picture change activity within a sequence of video frames. Image statistics on one or more intraframe characteristics of the sequence of video frames is compared to a preset threshold for deciding whether to continue within an existing GOP or to begin a new GOP. A frame of the sequence of video frames is intra-coded, and each of a variable number of subsequent frames is bi-directionally predictive-coded (B). Each B frame subsequent to the I frame is encoded employing forward prediction motion estimation only from the I frame. When a predefined picture degradation occurs, a new GOP is initiated. One example of an intraframe characteristic to be monitored is the number of intra-coded macroblocks within each B coded frame. This number is compared against a threshold number, which may be a percentage of the total number of macroblocks within the frame.read more
Citations
More filters
Patent
Video encoding method
TL;DR: In this paper, the MPEG-4 standard describes four prediction modes: direct prediction, bidirectional prediction, forward prediction, and backward prediction modes, which are used for the encoding of a block on the basis of a past reference frame and a future reference frame.
Patent
Grouping of image frames in video coding
TL;DR: In this paper, the buffer memory is configured to provide a number of image frames corresponding to a discontinuity in the numbering of the image frames, which are used in the decoding process.
Patent
Fast mode decision making for interframe encoding
Peng Yin,Jill Macdonald Boyce +1 more
TL;DR: In this paper, an initial subset of modes is considered and an estimation of the motion for each block in the sub-set is made to establish a best motion vector, and a distortion measure is also made for each subset.
Patent
Method and system for video encoding using a variable number of B frames
TL;DR: In this article, an effective method for dynamically selecting the number of I, P and B frames during video coding is proposed, which yields a variable number of B frames to be coded between any two stored pictures.
Proceedings ArticleDOI
Bidirectionally decodable Wyner-Ziv video coding
TL;DR: A novel bidirectionally decodable Wyner-Ziv video coding scheme which relaxes this inter frame dependency and outperforms H.264 up to 4dB at same bitrate.
References
More filters
Patent
High efficiency coding apparatus
TL;DR: In this article, a high efficiency coding apparatus performs the control so that the amount of generated information does not surpass a transmission capacity of a transmission path when variable-length coding for varying a word length corresponding to a dynamic range.
Patent
Method for jump-reproducing video data of moving picture coded with high efficiency
TL;DR: In this article, a disk stores data groups (GOP) of compressed picture data arranged over sectors, each sector has a 1st and a 2nd field, where the 1st field stores signals not interleaved relative to signals of the second field.
Patent
High efficiency technique for coding a digital video signal
TL;DR: In this article, the authors proposed a high efficiency apparatus for coding digital video data in which the number of bits per picture element in the video data such as a digital video signal or the like is compressed.
Patent
Dual encoding/compression method and system for picture quality/data density enhancement
TL;DR: In this article, a companion processor uses the first statistical data set and optional additional information to compute a set of filter and encoder control settings, which can be changed by the companion processor on a block, frame or GOP basis.
Patent
Real-time encoding of video sequence employing two encoders and statistical analysis
Charles Edward Boice,Barbara A. Hall,John Mark Kaczmarczyk,Agnes Yee Ngai,P Pokurinchakku Stephen +4 more
TL;DR: In this paper, a first encoding subsystem analyzes the sequence of video frames to derive information on at least one characteristic thereof, such as motion statistics, non-motion statistics, scene change statistics, or scene fade statistics.